Re: So.....? Houdini question here

[Olivier Jeannel]

Entagma has a tut for that
http://www.entagma.com/rebuilding-the-c4d-spline-wrap-deformer-in-houdini/

2017-03-07 1:16 GMT+01:00 Will Sharkey :

> As with all houdini answers, there are a few ways! Like this simple method:
> http://imgur.com/a/8M7gH
>
> The Lattice sop is set to 'points'. It is transferring the curve
> deformations to the Geo.
>
> On Mon, Mar 6, 2017 at 6:30 PM, Laurence Dodd  wrote:
>
>> So while waiting for sims, I'm digging around and, is it that I'm missing
>> something or or is there really not a simple deform by curve?  I found some
>> on Orbolt, the best one costing $10, but it seems odd that something so
>> basic is missing,
>> Am I being naive?
>>
>> --
>>
>> Laurence Dodd
>> Porkpie Animation
>> E: laure...@porkpie.tv
>> W: www.porkpie.tv
>> M: 07570 702 576
>> T: 01273 278 382
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>
--
Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
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Re: houdini question (and where to ask)

[Christopher Crouzet]

Wow, I shouldn't have wrote that late last night, I completely mixed things
up in my previous post, sorry!

I'll try again! With a ramp, you have the source (input) values on the X
axis, and the target (output) values on the Y axis. If either your source
or target values aren't in the range [0, 1], you can remap them using a
simple float parameter (to use as a simple multiplier if your desired lower
bound is 0), or a float2 parameter to precisely control the desired range.

It seems to be a standard practice in Houdini since they use it for some
built-in nodes, such as the Pyro SHOP.

Andy, the O(N) thing got me thinking and realized that instead of running
the attrib wrangle in detail mode, which uses only a single thread, it'd be
possible to generate say 4 points and, in a point wrangle, let each of
these points process 1/4th of the array, thus effectively running the same
logic on 4 threads! Another attrib wrangle is then needed in post to sum up
the result from each point. Well, in all honesty I don't think there'll
ever be a use case for it :)


On 7 March 2017 at 01:14, Olivier Jeannel  wrote:

> Ok we agree.
>
>
> On Monday, March 6, 2017, Jonathan Moore 
> wrote:
>
>> As far as I understood it Oliver, the spline version of the Houdini Ramp
>> only operates in the zero to one range. You re-fit the values pre/post/ or
>> both to suite your needs.
>>
>>
>>
>> I get that this doesn’t match the UX of FCurves in XSI, but I’ve always
>> understood Ramp’s in Houdini to be more of a lower level discrete element
>> in visual programing terms.
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
>> *Sent:* 06 March 2017 17:31
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list <
>> softimage@listproc.autodesk.com>
>> *Subject:* Re: houdini question (and where to ask)
>>
>>
>>
>> Not sure I get it Christopher (not in front of H)
>>
>> Does your trick actualy change the graph visualy ?
>>
>> In short, can I see the negative x & y values ?
>>
>> On Monday, March 6, 2017, Christopher Crouzet <
>> christopher.crou...@gmail.com> wrote:
>>
>> Indeed, which is why I mentioned the “detail” mode which brings you back
>> to O(N). Not saying that one approach is better than the other though, only
>> that it is possible.
>>
>>
>>
>> On 7 March 2017 at 00:12, Andy Nicholas  wrote:
>>
>> Yep it is possible, but you wouldn't want to do it because each
>> calculation of the maximum value would be running across N points to
>> calculate that. That'd make it an O(N^2) operation, albeit spread over
>> multiple threads.
>>
>> It might seem like a pain to have to do this in advance using an
>> Attribute Promote, but by doing so, it's actually forcing you to work in a
>> more efficient way. Go with it ;)
>>
>>
>>
>> On 06/03/2017 16:32, Christopher Crouzet wrote:
>>
>> It *is* possible to retrieve the maximum value in a VOP since nothing
>> stops anyone from manually iterating through all the points of the
>> geometry. This kind of operation might be more suited in “detail” mode
>> though.
>>
>> Also, having the ramp normalized to the [0, 1] range in both the X and Y
>> axis is usually “workarounded” by adding a float parameter for the
>> amplitude (Y axis) that is used as a global multiplier (making later
>> tweakings convenient!), and a float2 parameter for the target range (X
>> axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
>> range_max)` (which is also convenient for later tweakings!).
>>
>> Now, if you really want to have an actual FCurve, then just create a
>> simple float parameter, add all the keys however you want, then query it in
>> using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the
>> equivalent expression.
>>
>>
>>
>> On 6 March 2017 at 23:29, Jonathan Moore 
>> wrote:
>>
>> Fabricio ,
>>
>>
>>
>> The Attribute Promote help page has approx 15 examples you can load.
>> Hopefully you might find something within the examples to inspires a
>> solution.
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
>> *Sent:* 06 March 2017 15:56
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list <
>> softimage@listproc.autodesk.com>
>>
>>
>> *Subject:* Re: houdini question (and where to ask)
>>
>>
>>
>> You can't get the "get maximum in set" when inside a vop.
>>
>> But, you get those options with the promote attribute sop.
>>
>>
>>
>>
>> On Monday, March 6, 2017, Oscar Juarez  wrote:
>>
>> I would like to be proven wrong, but that would be the way, I mean in
>> your second pointvop you don't need to add another noise, your noise is
>> already saved in an attribute, when you promote just 

Re: So.....? Houdini question here

[Will Sharkey]

As with all houdini answers, there are a few ways! Like this simple method:
http://imgur.com/a/8M7gH

The Lattice sop is set to 'points'. It is transferring the curve
deformations to the Geo.

On Mon, Mar 6, 2017 at 6:30 PM, Laurence Dodd  wrote:

> So while waiting for sims, I'm digging around and, is it that I'm missing
> something or or is there really not a simple deform by curve?  I found some
> on Orbolt, the best one costing $10, but it seems odd that something so
> basic is missing,
> Am I being naive?
>
> --
>
> Laurence Dodd
> Porkpie Animation
> E: laure...@porkpie.tv
> W: www.porkpie.tv
> M: 07570 702 576
> T: 01273 278 382
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>
--
Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
"unsubscribe" in the subject, and reply to confirm.

So.....? Houdini question here

[Laurence Dodd]

So while waiting for sims, I'm digging around and, is it that I'm missing
something or or is there really not a simple deform by curve?  I found some
on Orbolt, the best one costing $10, but it seems odd that something so
basic is missing,
Am I being naive?

-- 

Laurence Dodd
Porkpie Animation
E: laure...@porkpie.tv
W: www.porkpie.tv
M: 07570 702 576
T: 01273 278 382
--
Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
"unsubscribe" in the subject, and reply to confirm.

Re: houdini question (and where to ask)

[Olivier Jeannel]

Ok we agree.


On Monday, March 6, 2017, Jonathan Moore  wrote:

> As far as I understood it Oliver, the spline version of the Houdini Ramp
> only operates in the zero to one range. You re-fit the values pre/post/ or
> both to suite your needs.
>
>
>
> I get that this doesn’t match the UX of FCurves in XSI, but I’ve always
> understood Ramp’s in Houdini to be more of a lower level discrete element
> in visual programing terms.
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com
> 
> [mailto:softimage-boun...@listproc.autodesk.com
> ]
> *On Behalf Of *Olivier Jeannel
> *Sent:* 06 March 2017 17:31
> *To:* Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list  >
> *Subject:* Re: houdini question (and where to ask)
>
>
>
> Not sure I get it Christopher (not in front of H)
>
> Does your trick actualy change the graph visualy ?
>
> In short, can I see the negative x & y values ?
>
> On Monday, March 6, 2017, Christopher Crouzet <
> christopher.crou...@gmail.com
> > wrote:
>
> Indeed, which is why I mentioned the “detail” mode which brings you back
> to O(N). Not saying that one approach is better than the other though, only
> that it is possible.
>
>
>
> On 7 March 2017 at 00:12, Andy Nicholas  wrote:
>
> Yep it is possible, but you wouldn't want to do it because each
> calculation of the maximum value would be running across N points to
> calculate that. That'd make it an O(N^2) operation, albeit spread over
> multiple threads.
>
> It might seem like a pain to have to do this in advance using an Attribute
> Promote, but by doing so, it's actually forcing you to work in a more
> efficient way. Go with it ;)
>
>
>
> On 06/03/2017 16:32, Christopher Crouzet wrote:
>
> It *is* possible to retrieve the maximum value in a VOP since nothing
> stops anyone from manually iterating through all the points of the
> geometry. This kind of operation might be more suited in “detail” mode
> though.
>
> Also, having the ramp normalized to the [0, 1] range in both the X and Y
> axis is usually “workarounded” by adding a float parameter for the
> amplitude (Y axis) that is used as a global multiplier (making later
> tweakings convenient!), and a float2 parameter for the target range (X
> axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
> range_max)` (which is also convenient for later tweakings!).
>
> Now, if you really want to have an actual FCurve, then just create a
> simple float parameter, add all the keys however you want, then query it in
> using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the
> equivalent expression.
>
>
>
> On 6 March 2017 at 23:29, Jonathan Moore 
> wrote:
>
> Fabricio ,
>
>
>
> The Attribute Promote help page has approx 15 examples you can load.
> Hopefully you might find something within the examples to inspires a
> solution.
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [mailto:softimage-bounces@
> listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
> *Sent:* 06 March 2017 15:56
> *To:* Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list 
>
>
> *Subject:* Re: houdini question (and where to ask)
>
>
>
> You can't get the "get maximum in set" when inside a vop.
>
> But, you get those options with the promote attribute sop.
>
>
>
>
> On Monday, March 6, 2017, Oscar Juarez  wrote:
>
> I would like to be proven wrong, but that would be the way, I mean in your
> second pointvop you don't need to add another noise, your noise is already
> saved in an attribute, when you promote just check off delete original and
> you can access the same noise. Also noises have specific output ranges,
> they come in the documentation, so you can always add a fit node to change
> your range to what you need, in the geometry spreadsheet you can also sort
> by value so you can see max and min.
>
>
>
> If you press X with your mouse over the noise output it will add a
> visualization node, you can visualize on the viewport or in the geometry
> spreadsheet the values. I know its not the same but as far as I know their
> is no way to do the same as the get maximum in set node in a vopsop context.
>
>
>
>
>
>
>
> On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon  > wrote:
>
> thanks everyone. The ramp parameter kind of works but as you say, is not
> that user friendly and does not show the points below 0. (that's ok, but I
> wonder if it is possible to write a custom widget in houdini)
>
>
>
> 

RE: houdini question (and where to ask)

[Jonathan Moore]

As far as I understood it Oliver, the spline version of the Houdini Ramp only 
operates in the zero to one range. You re-fit the values pre/post/ or both to 
suite your needs.

 

I get that this doesn’t match the UX of FCurves in XSI, but I’ve always 
understood Ramp’s in Houdini to be more of a lower level discrete element in 
visual programing terms.

 

From: softimage-boun...@listproc.autodesk.com 
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Olivier Jeannel
Sent: 06 March 2017 17:31
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list 

Subject: Re: houdini question (and where to ask)

 

Not sure I get it Christopher (not in front of H) 

Does your trick actualy change the graph visualy ?

In short, can I see the negative x & y values ?

On Monday, March 6, 2017, Christopher Crouzet  > wrote:

Indeed, which is why I mentioned the “detail” mode which brings you back to 
O(N). Not saying that one approach is better than the other though, only that 
it is possible.

 

On 7 March 2017 at 00:12, Andy Nicholas  > wrote:

Yep it is possible, but you wouldn't want to do it because each calculation of 
the maximum value would be running across N points to calculate that. That'd 
make it an O(N^2) operation, albeit spread over multiple threads.

It might seem like a pain to have to do this in advance using an Attribute 
Promote, but by doing so, it's actually forcing you to work in a more efficient 
way. Go with it ;)





On 06/03/2017 16:32, Christopher Crouzet wrote:

It is possible to retrieve the maximum value in a VOP since nothing stops 
anyone from manually iterating through all the points of the geometry. This 
kind of operation might be more suited in “detail” mode though.

Also, having the ramp normalized to the [0, 1] range in both the X and Y axis 
is usually “workarounded” by adding a float parameter for the amplitude (Y 
axis) that is used as a global multiplier (making later tweakings convenient!), 
and a float2 parameter for the target range (X axis) that is then remapped 
using `fit("my_ramp", 0.0, 1.0, range_min, range_max)` (which is also 
convenient for later tweakings!).

Now, if you really want to have an actual FCurve, then just create a simple 
float parameter, add all the keys however you want, then query it in using 
`chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the equivalent 
expression.

 

On 6 March 2017 at 23:29, Jonathan Moore  > wrote:

Fabricio , 

 

The Attribute Promote help page has approx 15 examples you can load. Hopefully 
you might find something within the examples to inspires a solution.

 

From: softimage-boun...@listproc.autodesk.com 
  
[mailto:softimage-boun...@listproc.autodesk.com 
 ] On 
Behalf Of Olivier Jeannel
Sent: 06 March 2017 15:56
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list 
  
 >


Subject: Re: houdini question (and where to ask)

 

You can't get the "get maximum in set" when inside a vop.

But, you get those options with the promote attribute sop.

 


On Monday, March 6, 2017, Oscar Juarez  > wrote:

I would like to be proven wrong, but that would be the way, I mean in your 
second pointvop you don't need to add another noise, your noise is already 
saved in an attribute, when you promote just check off delete original and you 
can access the same noise. Also noises have specific output ranges, they come 
in the documentation, so you can always add a fit node to change your range to 
what you need, in the geometry spreadsheet you can also sort by value so you 
can see max and min. 

 

If you press X with your mouse over the noise output it will add a 
visualization node, you can visualize on the viewport or in the geometry 
spreadsheet the values. I know its not the same but as far as I know their is 
no way to do the same as the get maximum in set node in a vopsop context.

 

 

 

On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon  > wrote:

thanks everyone. The ramp parameter kind of works but as you say, is not that 
user friendly and does not show the points below 0. (that's ok, but I wonder if 
it is possible to write a custom widget in houdini)

 

anyway, the thing I could not get right just yet is that sort of "get maximum 
in 

Re: houdini question (and where to ask)

[Andy Nicholas]

Yep, I understood what you were getting at, I just wanted to make it 
clear for those who are still learning all this :)


On 06/03/2017 17:20, Christopher Crouzet wrote:
Indeed, which is why I mentioned the “detail” mode which brings you 
back to O(N). Not saying that one approach is better than the other 
though, only that it is possible.



On 7 March 2017 at 00:12, Andy Nicholas > wrote:


Yep it is possible, but you wouldn't want to do it because each
calculation of the maximum value would be running across N points
to calculate that. That'd make it an O(N^2) operation, albeit
spread over multiple threads.

It might seem like a pain to have to do this in advance using an
Attribute Promote, but by doing so, it's actually forcing you to
work in a more efficient way. Go with it ;)



On 06/03/2017 16:32, Christopher Crouzet wrote:

It /is/ possible to retrieve the maximum value in a VOP since
nothing stops anyone from manually iterating through all the
points of the geometry. This kind of operation might be more
suited in “detail” mode though.

Also, having the ramp normalized to the [0, 1] range in both the
X and Y axis is usually “workarounded” by adding a float
parameter for the amplitude (Y axis) that is used as a global
multiplier (making later tweakings convenient!), and a float2
parameter for the target range (X axis) that is then remapped
using `fit("my_ramp", 0.0, 1.0, range_min, range_max)` (which is
also convenient for later tweakings!).

Now, if you really want to have an actual FCurve, then just
create a simple float parameter, add all the keys however you
want, then query it in using `chf("my_param",
the_time_in_seconds)` in VEX/VOP, or using the equivalent expression.


On 6 March 2017 at 23:29, Jonathan Moore
> wrote:

Fabricio ,

The Attribute Promote help page has approx 15 examples you
can load. Hopefully you might find something within the
examples to inspires a solution.

*From:*softimage-boun...@listproc.autodesk.com

[mailto:softimage-boun...@listproc.autodesk.com
] *On Behalf
Of *Olivier Jeannel
*Sent:* 06 March 2017 15:56
*To:* Official Softimage Users Mailing List.
https://groups.google.com/forum/#!forum/xsi_list

>


*Subject:* Re: houdini question (and where to ask)

You can't get the "get maximum in set" when inside a vop.

But, you get those options with the promote attribute sop.


On Monday, March 6, 2017, Oscar Juarez
> wrote:

I would like to be proven wrong, but that would be the
way, I mean in your second pointvop you don't need to add
another noise, your noise is already saved in an
attribute, when you promote just check off delete
original and you can access the same noise. Also noises
have specific output ranges, they come in the
documentation, so you can always add a fit node to change
your range to what you need, in the geometry spreadsheet
you can also sort by value so you can see max and min.

If you press X with your mouse over the noise output it
will add a visualization node, you can visualize on the
viewport or in the geometry spreadsheet the values. I
know its not the same but as far as I know their is no
way to do the same as the get maximum in set node in a
vopsop context.

On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon
 wrote:

thanks everyone. The ramp parameter kind of works but
as you say, is not that user friendly and does not
show the points below 0. (that's ok, but I wonder if
it is possible to write a custom widget in houdini)

anyway, the thing I could not get right just yet is
that sort of "get maximum in set" thing. Sorry for
using ICE language, I'm trying to be open minded
here, so please tell me if that`s not the correct
mindset.

so on this graph:

Imagem inline 1

...how could I get the maximum value of the output
noise node and compare to a single point output of
the same node?

From what I can tell, I'd have to:

Re: houdini question (and where to ask)

[Olivier Jeannel]

Not sure I get it Christopher (not in front of H)
Does your trick actualy change the graph visualy ?
In short, can I see the negative x & y values ?

On Monday, March 6, 2017, Christopher Crouzet 
wrote:

> Indeed, which is why I mentioned the “detail” mode which brings you back
> to O(N). Not saying that one approach is better than the other though, only
> that it is possible.
>
>
> On 7 March 2017 at 00:12, Andy Nicholas  > wrote:
>
>> Yep it is possible, but you wouldn't want to do it because each
>> calculation of the maximum value would be running across N points to
>> calculate that. That'd make it an O(N^2) operation, albeit spread over
>> multiple threads.
>>
>> It might seem like a pain to have to do this in advance using an
>> Attribute Promote, but by doing so, it's actually forcing you to work in a
>> more efficient way. Go with it ;)
>>
>>
>>
>> On 06/03/2017 16:32, Christopher Crouzet wrote:
>>
>> It *is* possible to retrieve the maximum value in a VOP since nothing
>> stops anyone from manually iterating through all the points of the
>> geometry. This kind of operation might be more suited in “detail” mode
>> though.
>>
>> Also, having the ramp normalized to the [0, 1] range in both the X and Y
>> axis is usually “workarounded” by adding a float parameter for the
>> amplitude (Y axis) that is used as a global multiplier (making later
>> tweakings convenient!), and a float2 parameter for the target range (X
>> axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
>> range_max)` (which is also convenient for later tweakings!).
>>
>> Now, if you really want to have an actual FCurve, then just create a
>> simple float parameter, add all the keys however you want, then query it in
>> using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the
>> equivalent expression.
>>
>>
>> On 6 March 2017 at 23:29, Jonathan Moore > > wrote:
>>
>>> Fabricio ,
>>>
>>>
>>>
>>> The Attribute Promote help page has approx 15 examples you can load.
>>> Hopefully you might find something within the examples to inspires a
>>> solution.
>>>
>>>
>>>
>>> *From:* softimage-boun...@listproc.autodesk.com
>>> 
>>> [mailto:softimage-boun...@listproc.autodesk.com
>>> ]
>>> *On Behalf Of *Olivier Jeannel
>>> *Sent:* 06 March 2017 15:56
>>> *To:* Official Softimage Users Mailing List.
>>> https://groups.google.com/forum/#!forum/xsi_list <
>>> softimage@listproc.autodesk.com
>>> >
>>>
>>> *Subject:* Re: houdini question (and where to ask)
>>>
>>>
>>>
>>> You can't get the "get maximum in set" when inside a vop.
>>>
>>> But, you get those options with the promote attribute sop.
>>>
>>>
>>>
>>>
>>> On Monday, March 6, 2017, Oscar Juarez >> > wrote:
>>>
>>> I would like to be proven wrong, but that would be the way, I mean in
>>> your second pointvop you don't need to add another noise, your noise is
>>> already saved in an attribute, when you promote just check off delete
>>> original and you can access the same noise. Also noises have specific
>>> output ranges, they come in the documentation, so you can always add a fit
>>> node to change your range to what you need, in the geometry spreadsheet you
>>> can also sort by value so you can see max and min.
>>>
>>>
>>>
>>> If you press X with your mouse over the noise output it will add a
>>> visualization node, you can visualize on the viewport or in the geometry
>>> spreadsheet the values. I know its not the same but as far as I know their
>>> is no way to do the same as the get maximum in set node in a vopsop context.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon 
>>> wrote:
>>>
>>> thanks everyone. The ramp parameter kind of works but as you say, is not
>>> that user friendly and does not show the points below 0. (that's ok, but I
>>> wonder if it is possible to write a custom widget in houdini)
>>>
>>>
>>>
>>> anyway, the thing I could not get right just yet is that sort of "get
>>> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
>>> minded here, so please tell me if that`s not the correct mindset.
>>>
>>>
>>>
>>> so on this graph:
>>>
>>>
>>>
>>> [image: Imagem inline 1]
>>>
>>>
>>>
>>> ...how could I get the maximum value of the output noise node and
>>> compare to a single point output of the same node?
>>>
>>>
>>>
>>> From what I can tell, I'd have to:
>>>
>>>
>>>
>>> 1- create this pointvop node with a turbnoise, then store the output
>>> noise into an attribute (via bindexport?)

RE: houdini question (and where to ask)

[Jonathan Moore]

I also read over on the SideFX forums that they purposely created separate
calls for Point, Vertex, Primitive, Volume VOP's and Wrangles as a pure UX
thing. They're all effectively Attribute VOP's/Wrangles (which is made clear
in the new H16 network editor) but they can only act on one type of
attribute at any one time (set via the Run Over parameter in the
Wrangle/VOP).

-Original Message-
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Gerbrand Nel
Sent: 06 March 2017 17:12
To: Official Softimage Users Mailing List.
https://groups.google.com/forum/#!forum/xsi_list

Subject: Re: houdini question (and where to ask)

On that subject; What is the real difference between using a attrib vop, and
a point vop?
I always just use the attrib vop, but mostly because I have no idea what the
difference is?
G
On 2017/03/06 6:32 PM, Christopher Crouzet wrote:
> This kind of operation might be more suited in "detail" mode though.


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Re: houdini question (and where to ask)

[Christopher Crouzet]

Indeed, which is why I mentioned the “detail” mode which brings you back to
O(N). Not saying that one approach is better than the other though, only
that it is possible.


On 7 March 2017 at 00:12, Andy Nicholas  wrote:

> Yep it is possible, but you wouldn't want to do it because each
> calculation of the maximum value would be running across N points to
> calculate that. That'd make it an O(N^2) operation, albeit spread over
> multiple threads.
>
> It might seem like a pain to have to do this in advance using an Attribute
> Promote, but by doing so, it's actually forcing you to work in a more
> efficient way. Go with it ;)
>
>
>
> On 06/03/2017 16:32, Christopher Crouzet wrote:
>
> It *is* possible to retrieve the maximum value in a VOP since nothing
> stops anyone from manually iterating through all the points of the
> geometry. This kind of operation might be more suited in “detail” mode
> though.
>
> Also, having the ramp normalized to the [0, 1] range in both the X and Y
> axis is usually “workarounded” by adding a float parameter for the
> amplitude (Y axis) that is used as a global multiplier (making later
> tweakings convenient!), and a float2 parameter for the target range (X
> axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
> range_max)` (which is also convenient for later tweakings!).
>
> Now, if you really want to have an actual FCurve, then just create a
> simple float parameter, add all the keys however you want, then query it in
> using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or using the
> equivalent expression.
>
>
> On 6 March 2017 at 23:29, Jonathan Moore 
> wrote:
>
>> Fabricio ,
>>
>>
>>
>> The Attribute Promote help page has approx 15 examples you can load.
>> Hopefully you might find something within the examples to inspires a
>> solution.
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
>> *Sent:* 06 March 2017 15:56
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list <
>> softimage@listproc.autodesk.com>
>>
>> *Subject:* Re: houdini question (and where to ask)
>>
>>
>>
>> You can't get the "get maximum in set" when inside a vop.
>>
>> But, you get those options with the promote attribute sop.
>>
>>
>>
>>
>> On Monday, March 6, 2017, Oscar Juarez  wrote:
>>
>> I would like to be proven wrong, but that would be the way, I mean in
>> your second pointvop you don't need to add another noise, your noise is
>> already saved in an attribute, when you promote just check off delete
>> original and you can access the same noise. Also noises have specific
>> output ranges, they come in the documentation, so you can always add a fit
>> node to change your range to what you need, in the geometry spreadsheet you
>> can also sort by value so you can see max and min.
>>
>>
>>
>> If you press X with your mouse over the noise output it will add a
>> visualization node, you can visualize on the viewport or in the geometry
>> spreadsheet the values. I know its not the same but as far as I know their
>> is no way to do the same as the get maximum in set node in a vopsop context.
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon 
>> wrote:
>>
>> thanks everyone. The ramp parameter kind of works but as you say, is not
>> that user friendly and does not show the points below 0. (that's ok, but I
>> wonder if it is possible to write a custom widget in houdini)
>>
>>
>>
>> anyway, the thing I could not get right just yet is that sort of "get
>> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
>> minded here, so please tell me if that`s not the correct mindset.
>>
>>
>>
>> so on this graph:
>>
>>
>>
>> [image: Imagem inline 1]
>>
>>
>>
>> ...how could I get the maximum value of the output noise node and compare
>> to a single point output of the same node?
>>
>>
>>
>> From what I can tell, I'd have to:
>>
>>
>>
>> 1- create this pointvop node with a turbnoise, then store the output
>> noise into an attribute (via bindexport?)
>>
>> 2- up one level -> drop an attrib promote (detail), set to maximum
>>
>> 3- drop another pointvop node with another noise node inside (same
>> parameters) and compare the result noise to that found on the atrib promote
>> node??
>>
>>
>>
>> I'm 99% sure this is totally wrong...how would you go about that single
>> task specifically?
>>
>>
>>
>> and finally, thanks for the suggestions on houdini forums and discord.
>> will try both (although I pretty much like this list =) )
>>
>>
>>
>>
>>
>> 2017-03-06 15:17 GMT+01:00 gareth bell :
>>
>> yeah - the lack of handles is frustrating
>> --
>>
>> *From:* softimage-boun...@listproc.autodesk.com <
>> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel 

Re: houdini question (and where to ask)

[Andy Nicholas]

There's no difference between the Attribute VOP and Point VOP, but it 
can be handy to express intention to other users between modifying 
points, versus attributes in general.

On 06/03/2017 17:12, Gerbrand Nel wrote:
> On that subject; What is the real difference between using a attrib vop,
> and a point vop?
> I always just use the attrib vop, but mostly because I have no idea what
> the difference is?
> G
> On 2017/03/06 6:32 PM, Christopher Crouzet wrote:
>> This kind of operation might be more suited in “detail” mode though.
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
> "unsubscribe" in the subject, and reply to confirm.

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Re: houdini question (and where to ask)

[Andy Nicholas]

Yep it is possible, but you wouldn't want to do it because each 
calculation of the maximum value would be running across N points to 
calculate that. That'd make it an O(N^2) operation, albeit spread over 
multiple threads.


It might seem like a pain to have to do this in advance using an 
Attribute Promote, but by doing so, it's actually forcing you to work in 
a more efficient way. Go with it ;)



On 06/03/2017 16:32, Christopher Crouzet wrote:
It /is/ possible to retrieve the maximum value in a VOP since nothing 
stops anyone from manually iterating through all the points of the 
geometry. This kind of operation might be more suited in “detail” mode 
though.


Also, having the ramp normalized to the [0, 1] range in both the X and 
Y axis is usually “workarounded” by adding a float parameter for the 
amplitude (Y axis) that is used as a global multiplier (making later 
tweakings convenient!), and a float2 parameter for the target range (X 
axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min, 
range_max)` (which is also convenient for later tweakings!).


Now, if you really want to have an actual FCurve, then just create a 
simple float parameter, add all the keys however you want, then query 
it in using `chf("my_param", the_time_in_seconds)` in VEX/VOP, or 
using the equivalent expression.



On 6 March 2017 at 23:29, Jonathan Moore > wrote:


Fabricio ,

The Attribute Promote help page has approx 15 examples you can
load. Hopefully you might find something within the examples to
inspires a solution.

*From:*softimage-boun...@listproc.autodesk.com

[mailto:softimage-boun...@listproc.autodesk.com
] *On Behalf Of
*Olivier Jeannel
*Sent:* 06 March 2017 15:56
*To:* Official Softimage Users Mailing List.
https://groups.google.com/forum/#!forum/xsi_list

>


*Subject:* Re: houdini question (and where to ask)

You can't get the "get maximum in set" when inside a vop.

But, you get those options with the promote attribute sop.


On Monday, March 6, 2017, Oscar Juarez > wrote:

I would like to be proven wrong, but that would be the way, I
mean in your second pointvop you don't need to add another
noise, your noise is already saved in an attribute, when you
promote just check off delete original and you can access the
same noise. Also noises have specific output ranges, they come
in the documentation, so you can always add a fit node to
change your range to what you need, in the geometry
spreadsheet you can also sort by value so you can see max and
min.

If you press X with your mouse over the noise output it will
add a visualization node, you can visualize on the viewport or
in the geometry spreadsheet the values. I know its not the
same but as far as I know their is no way to do the same as
the get maximum in set node in a vopsop context.

On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon
 wrote:

thanks everyone. The ramp parameter kind of works but as
you say, is not that user friendly and does not show the
points below 0. (that's ok, but I wonder if it is possible
to write a custom widget in houdini)

anyway, the thing I could not get right just yet is that
sort of "get maximum in set" thing. Sorry for using ICE
language, I'm trying to be open minded here, so please
tell me if that`s not the correct mindset.

so on this graph:

Imagem inline 1

...how could I get the maximum value of the output noise
node and compare to a single point output of the same node?

From what I can tell, I'd have to:

1- create this pointvop node with a turbnoise, then store
the output noise into an attribute (via bindexport?)

2- up one level -> drop an attrib promote (detail), set to
maximum

3- drop another pointvop node with another noise node
inside (same parameters) and compare the result noise to
that found on the atrib promote node??

I'm 99% sure this is totally wrong...how would you go
about that single task specifically?

and finally, thanks for the suggestions on houdini forums
and discord. will try both (although I pretty much like
this list =) )

2017-03-06 15:17 GMT+01:00 gareth bell
:

Re: houdini question (and where to ask)

[Gerbrand Nel]

On that subject; What is the real difference between using a attrib vop, 
and a point vop?
I always just use the attrib vop, but mostly because I have no idea what 
the difference is?
G
On 2017/03/06 6:32 PM, Christopher Crouzet wrote:
> This kind of operation might be more suited in “detail” mode though.


--
Softimage Mailing List.
To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with 
"unsubscribe" in the subject, and reply to confirm.

Re: houdini question (and where to ask)

[Christopher Crouzet]

It *is* possible to retrieve the maximum value in a VOP since nothing stops
anyone from manually iterating through all the points of the geometry. This
kind of operation might be more suited in “detail” mode though.

Also, having the ramp normalized to the [0, 1] range in both the X and Y
axis is usually “workarounded” by adding a float parameter for the
amplitude (Y axis) that is used as a global multiplier (making later
tweakings convenient!), and a float2 parameter for the target range (X
axis) that is then remapped using `fit("my_ramp", 0.0, 1.0, range_min,
range_max)` (which is also convenient for later tweakings!).

Now, if you really want to have an actual FCurve, then just create a simple
float parameter, add all the keys however you want, then query it in
using `chf("my_param",
the_time_in_seconds)` in VEX/VOP, or using the equivalent expression.


On 6 March 2017 at 23:29, Jonathan Moore  wrote:

> Fabricio ,
>
>
>
> The Attribute Promote help page has approx 15 examples you can load.
> Hopefully you might find something within the examples to inspires a
> solution.
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [mailto:softimage-bounces@
> listproc.autodesk.com] *On Behalf Of *Olivier Jeannel
> *Sent:* 06 March 2017 15:56
> *To:* Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list 
>
> *Subject:* Re: houdini question (and where to ask)
>
>
>
> You can't get the "get maximum in set" when inside a vop.
>
> But, you get those options with the promote attribute sop.
>
>
>
>
> On Monday, March 6, 2017, Oscar Juarez  wrote:
>
> I would like to be proven wrong, but that would be the way, I mean in your
> second pointvop you don't need to add another noise, your noise is already
> saved in an attribute, when you promote just check off delete original and
> you can access the same noise. Also noises have specific output ranges,
> they come in the documentation, so you can always add a fit node to change
> your range to what you need, in the geometry spreadsheet you can also sort
> by value so you can see max and min.
>
>
>
> If you press X with your mouse over the noise output it will add a
> visualization node, you can visualize on the viewport or in the geometry
> spreadsheet the values. I know its not the same but as far as I know their
> is no way to do the same as the get maximum in set node in a vopsop context.
>
>
>
>
>
>
>
> On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon 
> wrote:
>
> thanks everyone. The ramp parameter kind of works but as you say, is not
> that user friendly and does not show the points below 0. (that's ok, but I
> wonder if it is possible to write a custom widget in houdini)
>
>
>
> anyway, the thing I could not get right just yet is that sort of "get
> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
> minded here, so please tell me if that`s not the correct mindset.
>
>
>
> so on this graph:
>
>
>
> [image: Imagem inline 1]
>
>
>
> ...how could I get the maximum value of the output noise node and compare
> to a single point output of the same node?
>
>
>
> From what I can tell, I'd have to:
>
>
>
> 1- create this pointvop node with a turbnoise, then store the output noise
> into an attribute (via bindexport?)
>
> 2- up one level -> drop an attrib promote (detail), set to maximum
>
> 3- drop another pointvop node with another noise node inside (same
> parameters) and compare the result noise to that found on the atrib promote
> node??
>
>
>
> I'm 99% sure this is totally wrong...how would you go about that single
> task specifically?
>
>
>
> and finally, thanks for the suggestions on houdini forums and discord.
> will try both (although I pretty much like this list =) )
>
>
>
>
>
> 2017-03-06 15:17 GMT+01:00 gareth bell :
>
> yeah - the lack of handles is frustrating
> --
>
> *From:* softimage-boun...@listproc.autodesk.com <
> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel <
> facialdel...@gmail.com>
> *Sent:* 06 March 2017 14:05:17
> *To:* Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list
> *Subject:* Re: houdini question (and where to ask)
>
>
>
> yep but it has no handles
>
> and try to make négative values, it takes them but wont show on the curve
> as it has a 0,1 space.
>
> Unless i'm wrong (which i'd love to be)
>
>
>
> Le 6 mars 2017 14:36, "Olivier Jeannel"  a écrit :
>
> in vop, bind and bind export node will get an set datas.
>
> Ramp Parameters is sort of fcurve.
>
> It's a bit weak in terms of curve manipulation, but does the job.
>
> It has 2 modes rgb (ramp) and spline.
>
> If you use several ramps in the same vop, name them with different name or
> they might not export.
>
>
>
> Le 6 mars 2017 14:28, "Fabricio Chamon"  a 

RE: houdini question (and where to ask)

[Jonathan Moore]

Fabricio , 

 

The Attribute Promote help page has approx 15 examples you can load. Hopefully 
you might find something within the examples to inspires a solution.

 

From: softimage-boun...@listproc.autodesk.com 
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Olivier Jeannel
Sent: 06 March 2017 15:56
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list 

Subject: Re: houdini question (and where to ask)

 

You can't get the "get maximum in set" when inside a vop.

But, you get those options with the promote attribute sop.

 


On Monday, March 6, 2017, Oscar Juarez  > wrote:

I would like to be proven wrong, but that would be the way, I mean in your 
second pointvop you don't need to add another noise, your noise is already 
saved in an attribute, when you promote just check off delete original and you 
can access the same noise. Also noises have specific output ranges, they come 
in the documentation, so you can always add a fit node to change your range to 
what you need, in the geometry spreadsheet you can also sort by value so you 
can see max and min. 

 

If you press X with your mouse over the noise output it will add a 
visualization node, you can visualize on the viewport or in the geometry 
spreadsheet the values. I know its not the same but as far as I know their is 
no way to do the same as the get maximum in set node in a vopsop context.

 

 

 

On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon  > wrote:

thanks everyone. The ramp parameter kind of works but as you say, is not that 
user friendly and does not show the points below 0. (that's ok, but I wonder if 
it is possible to write a custom widget in houdini)

 

anyway, the thing I could not get right just yet is that sort of "get maximum 
in set" thing. Sorry for using ICE language, I'm trying to be open minded here, 
so please tell me if that`s not the correct mindset.

 

so on this graph:

 



 

...how could I get the maximum value of the output noise node and compare to a 
single point output of the same node?

 

>From what I can tell, I'd have to:

 

1- create this pointvop node with a turbnoise, then store the output noise into 
an attribute (via bindexport?) 

2- up one level -> drop an attrib promote (detail), set to maximum

3- drop another pointvop node with another noise node inside (same parameters) 
and compare the result noise to that found on the atrib promote node??

 

I'm 99% sure this is totally wrong...how would you go about that single task 
specifically?

 

and finally, thanks for the suggestions on houdini forums and discord. will try 
both (although I pretty much like this list =) )

 

 

2017-03-06 15:17 GMT+01:00 gareth bell  >:

yeah - the lack of handles is frustrating

  _  

From:  
 
softimage-boun...@listproc.autodesk.com < 
 
softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel < 
 facialdel...@gmail.com>
Sent: 06 March 2017 14:05:17
To: Official Softimage Users Mailing List.  
 
https://groups.google.com/forum/#!forum/xsi_list
Subject: Re: houdini question (and where to ask) 

 

yep but it has no handles  

and try to make négative values, it takes them but wont show on the curve as it 
has a 0,1 space.

Unless i'm wrong (which i'd love to be)

 

Le 6 mars 2017 14:36, "Olivier Jeannel"  > a écrit :

in vop, bind and bind export node will get an set datas. 

Ramp Parameters is sort of fcurve.

It's a bit weak in terms of curve manipulation, but does the job. 

It has 2 modes rgb (ramp) and spline.

If you use several ramps in the same vop, name them with different name or they 
might not export.

 

Le 6 mars 2017 14:28, "Fabricio Chamon"  > a écrit :

..sorry, hit send too soon. 

 

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with global point 
data?

 

Question #2: any nodes that resemble a fCurve node, like we have in ICE? if 
not, what is the alternative?

 

and finally, I can see this list is becoming more and more houdini-esque than 
ever..but, what is the best place to ask beginner questions like the above? 
houdini foruns, houdini list, odForce...

 

thanks!

 

2017-03-06 14:23 GMT+01:00 

Re: houdini question (and where to ask)

[Oscar Juarez]

I would like to be proven wrong, but that would be the way, I mean in your
second pointvop you don't need to add another noise, your noise is already
saved in an attribute, when you promote just check off delete original and
you can access the same noise. Also noises have specific output ranges,
they come in the documentation, so you can always add a fit node to change
your range to what you need, in the geometry spreadsheet you can also sort
by value so you can see max and min.

If you press X with your mouse over the noise output it will add a
visualization node, you can visualize on the viewport or in the geometry
spreadsheet the values. I know its not the same but as far as I know their
is no way to do the same as the get maximum in set node in a vopsop context.



On Mon, Mar 6, 2017 at 3:57 PM, Fabricio Chamon  wrote:

> thanks everyone. The ramp parameter kind of works but as you say, is not
> that user friendly and does not show the points below 0. (that's ok, but I
> wonder if it is possible to write a custom widget in houdini)
>
> anyway, the thing I could not get right just yet is that sort of "get
> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
> minded here, so please tell me if that`s not the correct mindset.
>
> so on this graph:
>
> [image: Imagem inline 1]
>
> ...how could I get the maximum value of the output noise node and compare
> to a single point output of the same node?
>
> From what I can tell, I'd have to:
>
> 1- create this pointvop node with a turbnoise, then store the output noise
> into an attribute (via bindexport?)
> 2- up one level -> drop an attrib promote (detail), set to maximum
> 3- drop another pointvop node with another noise node inside (same
> parameters) and compare the result noise to that found on the atrib promote
> node??
>
> I'm 99% sure this is totally wrong...how would you go about that single
> task specifically?
>
> and finally, thanks for the suggestions on houdini forums and discord.
> will try both (although I pretty much like this list =) )
>
>
> 2017-03-06 15:17 GMT+01:00 gareth bell :
>
>> yeah - the lack of handles is frustrating
>> --
>> *From:* softimage-boun...@listproc.autodesk.com <
>> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel <
>> facialdel...@gmail.com>
>> *Sent:* 06 March 2017 14:05:17
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list
>> *Subject:* Re: houdini question (and where to ask)
>>
>> yep but it has no handles
>> and try to make négative values, it takes them but wont show on the curve
>> as it has a 0,1 space.
>> Unless i'm wrong (which i'd love to be)
>>
>> Le 6 mars 2017 14:36, "Olivier Jeannel"  a
>> écrit :
>>
>>> in vop, bind and bind export node will get an set datas.
>>> Ramp Parameters is sort of fcurve.
>>> It's a bit weak in terms of curve manipulation, but does the job.
>>> It has 2 modes rgb (ramp) and spline.
>>> If you use several ramps in the same vop, name them with different name
>>> or they might not export.
>>>
>>> Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :
>>>
 ..sorry, hit send too soon.

 Question #1: are there any equivalents to ICE "get ... in set"? or or
 do I have to iterate and store values for later comparision? In other
 words: what is the best or recommended workflow to compare single point
 data with global point data?

 Question #2: any nodes that resemble a fCurve node, like we have in
 ICE? if not, what is the alternative?

 and finally, I can see this list is becoming more and more
 houdini-esque than ever..but, what is the best place to ask beginner
 questions like the above? houdini foruns, houdini list, odForce...

 thanks!

 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :

> Hi, I'm slowly getting into houdini and this is my first attempt to
> port a really simple ridged fractal deformer made in ICE to houdini (using
> pointvop).
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or
> do I have to iterate and store values for later comparision? In other
> words: what is the best or recommended workflow to compare single point
> data with
>


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 Softimage Mailing List.
 To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
 with "unsubscribe" in the subject, and reply to confirm.

>>>
>> --
>> Softimage Mailing List.
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>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
>
> --
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> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>
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To unsubscribe, 

Re: houdini question (and where to ask)

[Rob Chapman]

still also climbing the houdini mountain looking up from the foothills...
but I wonder if this would be a perfect opportunity for a specific wrangle
node  - whether that be Point, VEX, SOP or attribute I have literally no
idea :D

On 6 March 2017 at 14:57, Fabricio Chamon  wrote:

> thanks everyone. The ramp parameter kind of works but as you say, is not
> that user friendly and does not show the points below 0. (that's ok, but I
> wonder if it is possible to write a custom widget in houdini)
>
> anyway, the thing I could not get right just yet is that sort of "get
> maximum in set" thing. Sorry for using ICE language, I'm trying to be open
> minded here, so please tell me if that`s not the correct mindset.
>
> so on this graph:
>
> [image: Imagem inline 1]
>
> ...how could I get the maximum value of the output noise node and compare
> to a single point output of the same node?
>
> From what I can tell, I'd have to:
>
> 1- create this pointvop node with a turbnoise, then store the output noise
> into an attribute (via bindexport?)
> 2- up one level -> drop an attrib promote (detail), set to maximum
> 3- drop another pointvop node with another noise node inside (same
> parameters) and compare the result noise to that found on the atrib promote
> node??
>
> I'm 99% sure this is totally wrong...how would you go about that single
> task specifically?
>
> and finally, thanks for the suggestions on houdini forums and discord.
> will try both (although I pretty much like this list =) )
>
>
> 2017-03-06 15:17 GMT+01:00 gareth bell :
>
>> yeah - the lack of handles is frustrating
>> --
>> *From:* softimage-boun...@listproc.autodesk.com <
>> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel <
>> facialdel...@gmail.com>
>> *Sent:* 06 March 2017 14:05:17
>> *To:* Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list
>> *Subject:* Re: houdini question (and where to ask)
>>
>> yep but it has no handles
>> and try to make négative values, it takes them but wont show on the curve
>> as it has a 0,1 space.
>> Unless i'm wrong (which i'd love to be)
>>
>> Le 6 mars 2017 14:36, "Olivier Jeannel"  a
>> écrit :
>>
>>> in vop, bind and bind export node will get an set datas.
>>> Ramp Parameters is sort of fcurve.
>>> It's a bit weak in terms of curve manipulation, but does the job.
>>> It has 2 modes rgb (ramp) and spline.
>>> If you use several ramps in the same vop, name them with different name
>>> or they might not export.
>>>
>>> Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :
>>>
 ..sorry, hit send too soon.

 Question #1: are there any equivalents to ICE "get ... in set"? or or
 do I have to iterate and store values for later comparision? In other
 words: what is the best or recommended workflow to compare single point
 data with global point data?

 Question #2: any nodes that resemble a fCurve node, like we have in
 ICE? if not, what is the alternative?

 and finally, I can see this list is becoming more and more
 houdini-esque than ever..but, what is the best place to ask beginner
 questions like the above? houdini foruns, houdini list, odForce...

 thanks!

 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :

> Hi, I'm slowly getting into houdini and this is my first attempt to
> port a really simple ridged fractal deformer made in ICE to houdini (using
> pointvop).
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or
> do I have to iterate and store values for later comparision? In other
> words: what is the best or recommended workflow to compare single point
> data with
>


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>>>
>> --
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>>
>
>
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Re: houdini question (and where to ask)

[Gerbrand Nel]

don't forget the houdini mailing list.
https://lists.sidefx.com/mailman/listinfo/sidefx-houdini-list
sidefx-houdini-l...@sidefx.com
G
On 2017/03/06 4:57 PM, Fabricio Chamon wrote:
> nd finally, thanks for the suggestions on houdini forums and discord. 
> will try both (although I pretty much like this list =) )
>

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Re: houdini question (and where to ask)

[Tim Bolland]

I would love to know this too, I find the whole per-point/detail workflow kind 
of restricting. How is this actually working in ICE? Is everything being run 
per-point, including the so called globals? And in fact we only get shown a 
single value for feedback purposes?


Cheers,


Tim


From: softimage-boun...@listproc.autodesk.com 
 on behalf of Jonathan Moore 

Sent: 06 March 2017 15:08
To: 'Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list'
Subject: RE: houdini question (and where to ask)


Don’t forget Odforce. I’ve always found that community really helpful (speedy 
too).





From: softimage-boun...@listproc.autodesk.com 
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Fabricio Chamon
Sent: 06 March 2017 14:58
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list 

Subject: Re: houdini question (and where to ask)



thanks everyone. The ramp parameter kind of works but as you say, is not that 
user friendly and does not show the points below 0. (that's ok, but I wonder if 
it is possible to write a custom widget in houdini)



anyway, the thing I could not get right just yet is that sort of "get maximum 
in set" thing. Sorry for using ICE language, I'm trying to be open minded here, 
so please tell me if that`s not the correct mindset.



so on this graph:



[Imagem inline 1]



...how could I get the maximum value of the output noise node and compare to a 
single point output of the same node?



>From what I can tell, I'd have to:



1- create this pointvop node with a turbnoise, then store the output noise into 
an attribute (via bindexport?)

2- up one level -> drop an attrib promote (detail), set to maximum

3- drop another pointvop node with another noise node inside (same parameters) 
and compare the result noise to that found on the atrib promote node??



I'm 99% sure this is totally wrong...how would you go about that single task 
specifically?



and finally, thanks for the suggestions on houdini forums and discord. will try 
both (although I pretty much like this list =) )





2017-03-06 15:17 GMT+01:00 gareth bell 
>:

yeah - the lack of handles is frustrating



From: 
softimage-boun...@listproc.autodesk.com
 
>
 on behalf of Olivier Jeannel 
>
Sent: 06 March 2017 14:05:17
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list
Subject: Re: houdini question (and where to ask)



yep but it has no handles

and try to make négative values, it takes them but wont show on the curve as it 
has a 0,1 space.

Unless i'm wrong (which i'd love to be)



Le 6 mars 2017 14:36, "Olivier Jeannel" 
> a écrit :

in vop, bind and bind export node will get an set datas.

Ramp Parameters is sort of fcurve.

It's a bit weak in terms of curve manipulation, but does the job.

It has 2 modes rgb (ramp) and spline.

If you use several ramps in the same vop, name them with different name or they 
might not export.



Le 6 mars 2017 14:28, "Fabricio Chamon" 
> a écrit :

..sorry, hit send too soon.



Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with global point 
data?



Question #2: any nodes that resemble a fCurve node, like we have in ICE? if 
not, what is the alternative?



and finally, I can see this list is becoming more and more houdini-esque than 
ever..but, what is the best place to ask beginner questions like the above? 
houdini foruns, houdini list, odForce...



thanks!



2017-03-06 14:23 GMT+01:00 Fabricio Chamon 
>:

Hi, I'm slowly getting into houdini and this is my first attempt to port a 
really simple ridged fractal deformer made in ICE to houdini (using pointvop).



Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with



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RE: houdini question (and where to ask)

[Jonathan Moore]

Don’t forget Odforce. I’ve always found that community really helpful (speedy 
too).

 

 

From: softimage-boun...@listproc.autodesk.com 
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Fabricio Chamon
Sent: 06 March 2017 14:58
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list 

Subject: Re: houdini question (and where to ask)

 

thanks everyone. The ramp parameter kind of works but as you say, is not that 
user friendly and does not show the points below 0. (that's ok, but I wonder if 
it is possible to write a custom widget in houdini)

 

anyway, the thing I could not get right just yet is that sort of "get maximum 
in set" thing. Sorry for using ICE language, I'm trying to be open minded here, 
so please tell me if that`s not the correct mindset.

 

so on this graph:

 



 

...how could I get the maximum value of the output noise node and compare to a 
single point output of the same node?

 

>From what I can tell, I'd have to:

 

1- create this pointvop node with a turbnoise, then store the output noise into 
an attribute (via bindexport?) 

2- up one level -> drop an attrib promote (detail), set to maximum

3- drop another pointvop node with another noise node inside (same parameters) 
and compare the result noise to that found on the atrib promote node??

 

I'm 99% sure this is totally wrong...how would you go about that single task 
specifically?

 

and finally, thanks for the suggestions on houdini forums and discord. will try 
both (although I pretty much like this list =) )

 

 

2017-03-06 15:17 GMT+01:00 gareth bell  >:

yeah - the lack of handles is frustrating

  _  

From: softimage-boun...@listproc.autodesk.com 
  
 > on behalf of Olivier Jeannel 
 >
Sent: 06 March 2017 14:05:17
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list
Subject: Re: houdini question (and where to ask) 

 

yep but it has no handles  

and try to make négative values, it takes them but wont show on the curve as it 
has a 0,1 space.

Unless i'm wrong (which i'd love to be)

 

Le 6 mars 2017 14:36, "Olivier Jeannel"  > a écrit :

in vop, bind and bind export node will get an set datas. 

Ramp Parameters is sort of fcurve.

It's a bit weak in terms of curve manipulation, but does the job. 

It has 2 modes rgb (ramp) and spline.

If you use several ramps in the same vop, name them with different name or they 
might not export.

 

Le 6 mars 2017 14:28, "Fabricio Chamon"  > a écrit :

..sorry, hit send too soon. 

 

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with global point 
data?

 

Question #2: any nodes that resemble a fCurve node, like we have in ICE? if 
not, what is the alternative?

 

and finally, I can see this list is becoming more and more houdini-esque than 
ever..but, what is the best place to ask beginner questions like the above? 
houdini foruns, houdini list, odForce...

 

thanks!

 

2017-03-06 14:23 GMT+01:00 Fabricio Chamon  >:

Hi, I'm slowly getting into houdini and this is my first attempt to port a 
really simple ridged fractal deformer made in ICE to houdini (using pointvop).  

 

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with 

 


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  with "unsubscribe" in the 
subject, and reply to confirm.


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  with "unsubscribe" in the 
subject, and reply to confirm.

 

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Re: houdini question (and where to ask)

[Fabricio Chamon]

thanks everyone. The ramp parameter kind of works but as you say, is not
that user friendly and does not show the points below 0. (that's ok, but I
wonder if it is possible to write a custom widget in houdini)

anyway, the thing I could not get right just yet is that sort of "get
maximum in set" thing. Sorry for using ICE language, I'm trying to be open
minded here, so please tell me if that`s not the correct mindset.

so on this graph:

[image: Imagem inline 1]

...how could I get the maximum value of the output noise node and compare
to a single point output of the same node?

>From what I can tell, I'd have to:

1- create this pointvop node with a turbnoise, then store the output noise
into an attribute (via bindexport?)
2- up one level -> drop an attrib promote (detail), set to maximum
3- drop another pointvop node with another noise node inside (same
parameters) and compare the result noise to that found on the atrib promote
node??

I'm 99% sure this is totally wrong...how would you go about that single
task specifically?

and finally, thanks for the suggestions on houdini forums and discord. will
try both (although I pretty much like this list =) )


2017-03-06 15:17 GMT+01:00 gareth bell :

> yeah - the lack of handles is frustrating
> --
> *From:* softimage-boun...@listproc.autodesk.com <
> softimage-boun...@listproc.autodesk.com> on behalf of Olivier Jeannel <
> facialdel...@gmail.com>
> *Sent:* 06 March 2017 14:05:17
> *To:* Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list
> *Subject:* Re: houdini question (and where to ask)
>
> yep but it has no handles
> and try to make négative values, it takes them but wont show on the curve
> as it has a 0,1 space.
> Unless i'm wrong (which i'd love to be)
>
> Le 6 mars 2017 14:36, "Olivier Jeannel"  a écrit :
>
>> in vop, bind and bind export node will get an set datas.
>> Ramp Parameters is sort of fcurve.
>> It's a bit weak in terms of curve manipulation, but does the job.
>> It has 2 modes rgb (ramp) and spline.
>> If you use several ramps in the same vop, name them with different name
>> or they might not export.
>>
>> Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :
>>
>>> ..sorry, hit send too soon.
>>>
>>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>>> I have to iterate and store values for later comparision? In other words:
>>> what is the best or recommended workflow to compare single point data with
>>> global point data?
>>>
>>> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
>>> if not, what is the alternative?
>>>
>>> and finally, I can see this list is becoming more and more houdini-esque
>>> than ever..but, what is the best place to ask beginner questions like the
>>> above? houdini foruns, houdini list, odForce...
>>>
>>> thanks!
>>>
>>> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :
>>>
 Hi, I'm slowly getting into houdini and this is my first attempt to
 port a really simple ridged fractal deformer made in ICE to houdini (using
 pointvop).

 Question #1: are there any equivalents to ICE "get ... in set"? or or
 do I have to iterate and store values for later comparision? In other
 words: what is the best or recommended workflow to compare single point
 data with

>>>
>>>
>>> --
>>> Softimage Mailing List.
>>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>>> with "unsubscribe" in the subject, and reply to confirm.
>>>
>>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>
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Re: houdini question (and where to ask)

[Tim Bolland]

I find the Discord chatroom a great place for information and general Houdini 
info. You should be able to join with the below link.

https://discordapp.com/invite/b8U5Hdy



From: softimage-boun...@listproc.autodesk.com 
 on behalf of Fabricio Chamon 

Sent: 06 March 2017 13:27
To: softimage@listproc.autodesk.com
Subject: Re: houdini question (and where to ask)

..sorry, hit send too soon.

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with global point 
data?

Question #2: any nodes that resemble a fCurve node, like we have in ICE? if 
not, what is the alternative?

and finally, I can see this list is becoming more and more houdini-esque than 
ever..but, what is the best place to ask beginner questions like the above? 
houdini foruns, houdini list, odForce...

thanks!

2017-03-06 14:23 GMT+01:00 Fabricio Chamon 
>:
Hi, I'm slowly getting into houdini and this is my first attempt to port a 
really simple ridged fractal deformer made in ICE to houdini (using pointvop).

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with

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Re: houdini question (and where to ask)

[gareth bell]

yeah - the lack of handles is frustrating


From: softimage-boun...@listproc.autodesk.com 
 on behalf of Olivier Jeannel 

Sent: 06 March 2017 14:05:17
To: Official Softimage Users Mailing List. 
https://groups.google.com/forum/#!forum/xsi_list
Subject: Re: houdini question (and where to ask)

yep but it has no handles
and try to make négative values, it takes them but wont show on the curve as it 
has a 0,1 space.
Unless i'm wrong (which i'd love to be)

Le 6 mars 2017 14:36, "Olivier Jeannel" 
> a écrit :
in vop, bind and bind export node will get an set datas.
Ramp Parameters is sort of fcurve.
It's a bit weak in terms of curve manipulation, but does the job.
It has 2 modes rgb (ramp) and spline.
If you use several ramps in the same vop, name them with different name or they 
might not export.

Le 6 mars 2017 14:28, "Fabricio Chamon" 
> a écrit :
..sorry, hit send too soon.

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with global point 
data?

Question #2: any nodes that resemble a fCurve node, like we have in ICE? if 
not, what is the alternative?

and finally, I can see this list is becoming more and more houdini-esque than 
ever..but, what is the best place to ask beginner questions like the above? 
houdini foruns, houdini list, odForce...

thanks!

2017-03-06 14:23 GMT+01:00 Fabricio Chamon 
>:
Hi, I'm slowly getting into houdini and this is my first attempt to port a 
really simple ridged fractal deformer made in ICE to houdini (using pointvop).

Question #1: are there any equivalents to ICE "get ... in set"? or or do I have 
to iterate and store values for later comparision? In other words: what is the 
best or recommended workflow to compare single point data with


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Re: houdini question (and where to ask)

[Olivier Jeannel]

yep but it has no handles
and try to make négative values, it takes them but wont show on the curve
as it has a 0,1 space.
Unless i'm wrong (which i'd love to be)

Le 6 mars 2017 14:36, "Olivier Jeannel"  a écrit :

> in vop, bind and bind export node will get an set datas.
> Ramp Parameters is sort of fcurve.
> It's a bit weak in terms of curve manipulation, but does the job.
> It has 2 modes rgb (ramp) and spline.
> If you use several ramps in the same vop, name them with different name or
> they might not export.
>
> Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :
>
>> ..sorry, hit send too soon.
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>> global point data?
>>
>> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
>> if not, what is the alternative?
>>
>> and finally, I can see this list is becoming more and more houdini-esque
>> than ever..but, what is the best place to ask beginner questions like the
>> above? houdini foruns, houdini list, odForce...
>>
>> thanks!
>>
>> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :
>>
>>> Hi, I'm slowly getting into houdini and this is my first attempt to port
>>> a really simple ridged fractal deformer made in ICE to houdini (using
>>> pointvop).
>>>
>>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>>> I have to iterate and store values for later comparision? In other words:
>>> what is the best or recommended workflow to compare single point data with
>>>
>>
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
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Re: houdini question (and where to ask)

[Jonathan Moore]

I prefer the ramp in Houdini as it has a couple of hidden tricks within the
interface. Hopefully the screen grabs explains all but the things I like
are the ability the make UI larger for more sensitive tweaks and the the
extensive interpolation modes.






On 6 March 2017 at 13:36, Olivier Jeannel  wrote:

> in vop, bind and bind export node will get an set datas.
> Ramp Parameters is sort of fcurve.
> It's a bit weak in terms of curve manipulation, but does the job.
> It has 2 modes rgb (ramp) and spline.
> If you use several ramps in the same vop, name them with different name or
> they might not export.
>
> Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :
>
>> ..sorry, hit send too soon.
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>> global point data?
>>
>> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
>> if not, what is the alternative?
>>
>> and finally, I can see this list is becoming more and more houdini-esque
>> than ever..but, what is the best place to ask beginner questions like the
>> above? houdini foruns, houdini list, odForce...
>>
>> thanks!
>>
>> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :
>>
>>> Hi, I'm slowly getting into houdini and this is my first attempt to port
>>> a really simple ridged fractal deformer made in ICE to houdini (using
>>> pointvop).
>>>
>>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>>> I have to iterate and store values for later comparision? In other words:
>>> what is the best or recommended workflow to compare single point data with
>>>
>>
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
> --
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> with "unsubscribe" in the subject, and reply to confirm.
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Re: houdini question (and where to ask)

[Olivier Jeannel]

in vop, bind and bind export node will get an set datas.
Ramp Parameters is sort of fcurve.
It's a bit weak in terms of curve manipulation, but does the job.
It has 2 modes rgb (ramp) and spline.
If you use several ramps in the same vop, name them with different name or
they might not export.

Le 6 mars 2017 14:28, "Fabricio Chamon"  a écrit :

> ..sorry, hit send too soon.
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or do I
> have to iterate and store values for later comparision? In other words:
> what is the best or recommended workflow to compare single point data with
> global point data?
>
> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
> if not, what is the alternative?
>
> and finally, I can see this list is becoming more and more houdini-esque
> than ever..but, what is the best place to ask beginner questions like the
> above? houdini foruns, houdini list, odForce...
>
> thanks!
>
> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :
>
>> Hi, I'm slowly getting into houdini and this is my first attempt to port
>> a really simple ridged fractal deformer made in ICE to houdini (using
>> pointvop).
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>>
>
>
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> Softimage Mailing List.
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Re: houdini question (and where to ask)

[Oscar Juarez]

For your second question, the equivalent for an fcurve node would be the
ramp parameter node, set to float values. You have to go up one level to
adjust the actual fcurve.

And for your last question, I might not be that helpful but in the SideFx
forums there is a forum specially for softimage users which might be a good
place to ask about equivalent tools between softimage and houdini. I find
it that asking houdini questions here keeps also things moving, but some
people might not like it.

cheers.



On Mon, Mar 6, 2017 at 2:27 PM, Fabricio Chamon  wrote:

> ..sorry, hit send too soon.
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or do I
> have to iterate and store values for later comparision? In other words:
> what is the best or recommended workflow to compare single point data with
> global point data?
>
> Question #2: any nodes that resemble a fCurve node, like we have in ICE?
> if not, what is the alternative?
>
> and finally, I can see this list is becoming more and more houdini-esque
> than ever..but, what is the best place to ask beginner questions like the
> above? houdini foruns, houdini list, odForce...
>
> thanks!
>
> 2017-03-06 14:23 GMT+01:00 Fabricio Chamon :
>
>> Hi, I'm slowly getting into houdini and this is my first attempt to port
>> a really simple ridged fractal deformer made in ICE to houdini (using
>> pointvop).
>>
>> Question #1: are there any equivalents to ICE "get ... in set"? or or do
>> I have to iterate and store values for later comparision? In other words:
>> what is the best or recommended workflow to compare single point data with
>>
>
>
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> with "unsubscribe" in the subject, and reply to confirm.
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Re: houdini question (and where to ask)

[Fabricio Chamon]

..sorry, hit send too soon.

Question #1: are there any equivalents to ICE "get ... in set"? or or do I
have to iterate and store values for later comparision? In other words:
what is the best or recommended workflow to compare single point data with
global point data?

Question #2: any nodes that resemble a fCurve node, like we have in ICE? if
not, what is the alternative?

and finally, I can see this list is becoming more and more houdini-esque
than ever..but, what is the best place to ask beginner questions like the
above? houdini foruns, houdini list, odForce...

thanks!

2017-03-06 14:23 GMT+01:00 Fabricio Chamon :

> Hi, I'm slowly getting into houdini and this is my first attempt to port a
> really simple ridged fractal deformer made in ICE to houdini (using
> pointvop).
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or do I
> have to iterate and store values for later comparision? In other words:
> what is the best or recommended workflow to compare single point data with
>
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Re: houdini question (and where to ask)

[Oscar Juarez]

As far as I know inside the pointvop  context you can't do it, but you have
the attribpromote nodes, that let you promote point attributes to detail
for example and get the maximum value or minimum or whatever you need. You
save it to another attribute which you can then access on the pointvop
context.

On Mon, Mar 6, 2017 at 2:23 PM, Fabricio Chamon  wrote:

> Hi, I'm slowly getting into houdini and this is my first attempt to port a
> really simple ridged fractal deformer made in ICE to houdini (using
> pointvop).
>
> Question #1: are there any equivalents to ICE "get ... in set"? or or do I
> have to iterate and store values for later comparision? In other words:
> what is the best or recommended workflow to compare single point data with
>
> --
> Softimage Mailing List.
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> with "unsubscribe" in the subject, and reply to confirm.
>
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houdini question (and where to ask)

[Fabricio Chamon]

Hi, I'm slowly getting into houdini and this is my first attempt to port a
really simple ridged fractal deformer made in ICE to houdini (using
pointvop).

Question #1: are there any equivalents to ICE "get ... in set"? or or do I
have to iterate and store values for later comparision? In other words:
what is the best or recommended workflow to compare single point data with
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Re: A gem of a tutorial

[Chris Marshall]

OK Thanks Olivier


On 6 March 2017 at 11:09, Olivier Jeannel  wrote:

> Objects in houdini are just like drawers or directories that you just
> browse through.
> Everything has an adress that you point to, even the ports (opinput) of
> nodes or the contexts (obj, shop, etc...).
>
>
> Le 6 mars 2017 11:49, "Chris Marshall"  a
> écrit :
>
>> ok thanks
>>
>>
>> On 6 March 2017 at 10:45, Oscar Juarez  wrote:
>>
>>> The geometry SOP is just a container, it is a node that lives in the
>>> Object context of Houdini, much like any object in Softimage. When you dive
>>> inside this node, it would be like going inside the construction stack of
>>> softimage, every node inside could be thought as an operator in the
>>> construction stack. It is not exactly the same but it helps to see it like
>>> that.
>>>
>>> He deletes immediately the node, because the default node that comes
>>> with the geometry is the file SOP which allows you to load external
>>> geometry, since he is creating geometry from scratch he doesn't really need
>>> it.
>>>
>>> Hope it helps.
>>>
>>> On Mon, Mar 6, 2017 at 11:31 AM, Chris Marshall <
>>> chrismarshal...@gmail.com> wrote:
>>>
 Hi
 I've been watching this tutorial, which is pretty amazing, and trying
 to get to grips with some of the Houdini workflows here. The first thing he
 does is creates a GeoSop? But then goes into that node and deletes the
 contents. Can anyone just briefly explain what the logic is behind what the
 geosop node is and why the first thing you'd do is remove what's been
 created by default?

 Thanks
 Chris


 On 27 February 2017 at 22:49, Sven Constable 
 wrote:

> And I should have said "impressive", not "impressing". Sorry.
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [mailto:
> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sven Constable
> *Sent:* Monday, February 27, 2017 11:28 PM
> *To:* 'Official Softimage Users Mailing List.
> https://groups.google.com/forum/#!forum/xsi_list'
> *Subject:* RE: A gem of a tutorial
>
>
>
> I didn't watch many Houdini tutorials. This is the most impressing
> one, I've seen so far. Even the techniques are common in some way, the way
> they easily work together is mindblowing.
>
>
>
> Sven
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [
> mailto:softimage-boun...@listproc.autodesk.com
> ] *On Behalf Of *Tim Bolland
> *Sent:* Monday, February 27, 2017 1:05 PM
> *To:* softimage@listproc.autodesk.com
> *Subject:* A gem of a tutorial
>
>
>
> http://www.entagma.com/modeling-and-rendering-a-quartz-cryst
> al-in-houdini-16/
>
>
>
>
>
> I'm sold.
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>



 --
 Chris Marshall
 Mint Motion Limited
 029 20 37 27 57
 07730 533 115
 www.mintmotion.co.uk
 www.dot3d.com



 --
 Softimage Mailing List.
 To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
 with "unsubscribe" in the subject, and reply to confirm.

>>>
>>>
>>> --
>>> Softimage Mailing List.
>>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>>> with "unsubscribe" in the subject, and reply to confirm.
>>>
>>
>>
>>
>> --
>> Chris Marshall
>> Mint Motion Limited
>> 029 20 37 27 57
>> 07730 533 115
>> www.mintmotion.co.uk
>> www.dot3d.com
>>
>>
>>
>> --
>> Softimage Mailing List.
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>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
> --
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> with "unsubscribe" in the subject, and reply to confirm.
>



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029 20 37 27 57
07730 533 115
www.mintmotion.co.uk
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Re: A gem of a tutorial

[Olivier Jeannel]

Objects in houdini are just like drawers or directories that you just
browse through.
Everything has an adress that you point to, even the ports (opinput) of
nodes or the contexts (obj, shop, etc...).


Le 6 mars 2017 11:49, "Chris Marshall"  a écrit :

> ok thanks
>
>
> On 6 March 2017 at 10:45, Oscar Juarez  wrote:
>
>> The geometry SOP is just a container, it is a node that lives in the
>> Object context of Houdini, much like any object in Softimage. When you dive
>> inside this node, it would be like going inside the construction stack of
>> softimage, every node inside could be thought as an operator in the
>> construction stack. It is not exactly the same but it helps to see it like
>> that.
>>
>> He deletes immediately the node, because the default node that comes with
>> the geometry is the file SOP which allows you to load external geometry,
>> since he is creating geometry from scratch he doesn't really need it.
>>
>> Hope it helps.
>>
>> On Mon, Mar 6, 2017 at 11:31 AM, Chris Marshall <
>> chrismarshal...@gmail.com> wrote:
>>
>>> Hi
>>> I've been watching this tutorial, which is pretty amazing, and trying to
>>> get to grips with some of the Houdini workflows here. The first thing he
>>> does is creates a GeoSop? But then goes into that node and deletes the
>>> contents. Can anyone just briefly explain what the logic is behind what the
>>> geosop node is and why the first thing you'd do is remove what's been
>>> created by default?
>>>
>>> Thanks
>>> Chris
>>>
>>>
>>> On 27 February 2017 at 22:49, Sven Constable 
>>> wrote:
>>>
 And I should have said "impressive", not "impressing". Sorry.



 *From:* softimage-boun...@listproc.autodesk.com [mailto:
 softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sven Constable
 *Sent:* Monday, February 27, 2017 11:28 PM
 *To:* 'Official Softimage Users Mailing List.
 https://groups.google.com/forum/#!forum/xsi_list'
 *Subject:* RE: A gem of a tutorial



 I didn't watch many Houdini tutorials. This is the most impressing one,
 I've seen so far. Even the techniques are common in some way, the way they
 easily work together is mindblowing.



 Sven



 *From:* softimage-boun...@listproc.autodesk.com [
 mailto:softimage-boun...@listproc.autodesk.com
 ] *On Behalf Of *Tim Bolland
 *Sent:* Monday, February 27, 2017 1:05 PM
 *To:* softimage@listproc.autodesk.com
 *Subject:* A gem of a tutorial



 http://www.entagma.com/modeling-and-rendering-a-quartz-cryst
 al-in-houdini-16/





 I'm sold.

 --
 Softimage Mailing List.
 To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
 with "unsubscribe" in the subject, and reply to confirm.

>>>
>>>
>>>
>>> --
>>> Chris Marshall
>>> Mint Motion Limited
>>> 029 20 37 27 57
>>> 07730 533 115
>>> www.mintmotion.co.uk
>>> www.dot3d.com
>>>
>>>
>>>
>>> --
>>> Softimage Mailing List.
>>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>>> with "unsubscribe" in the subject, and reply to confirm.
>>>
>>
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
>
>
> --
> Chris Marshall
> Mint Motion Limited
> 029 20 37 27 57
> 07730 533 115
> www.mintmotion.co.uk
> www.dot3d.com
>
>
>
> --
> Softimage Mailing List.
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RE: Need help - Scene crashing on the farm - renders in the UI

[Morten Bartholdy]

Thanks Holger,

So what you are saying that some combination of content, overrrides and delta 
data is throwing Arnold off, or XSI off?

I made referenced models local but it still crashes.

I think I have narrowed the problem down to a particular version of my 
environment by using a backup of an older version which renders fine.

Weird thing is my new environment renders fine in its own scene, but not in the 
production scene with passes and overrides.

Tough one, but thanks for the insight.

Cheers
Morten






> Den 6. marts 2017 klokken 11:48 skrev Schoenberger :
> 
> 
> 
> 
>  |> 1. Crash was caused by a NULL pointer memory access.
>  |> 2. 'A heap has been corrupted.'
> I am sorry, but it won't probably help you to know.
> They have a bug in the software accessing the memory.
> 1. They have assigned a random memory segment for a variable, but the 
> application did never tell Windows to assign a part of the
> memory.
> 2. Different kind of memory.
> 
> 
> >but the scene doesn't render the problem might lie somewhere in ref model 
> >deltas or overrrides in passes.
> Delete as many other passes as you can, try to delete deltas, delete 
> overrrides, delete ref models.
> This way you can find out which combination of ref model/delta/pass overrides 
> is responsible.
> 
> 
> Holger Schönberger
> technical director
> The day has 24 hours, if that does not suffice, I will take the night
> 
> 
> 
> 
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Re: A gem of a tutorial

[Chris Marshall]

ok thanks


On 6 March 2017 at 10:45, Oscar Juarez  wrote:

> The geometry SOP is just a container, it is a node that lives in the
> Object context of Houdini, much like any object in Softimage. When you dive
> inside this node, it would be like going inside the construction stack of
> softimage, every node inside could be thought as an operator in the
> construction stack. It is not exactly the same but it helps to see it like
> that.
>
> He deletes immediately the node, because the default node that comes with
> the geometry is the file SOP which allows you to load external geometry,
> since he is creating geometry from scratch he doesn't really need it.
>
> Hope it helps.
>
> On Mon, Mar 6, 2017 at 11:31 AM, Chris Marshall  > wrote:
>
>> Hi
>> I've been watching this tutorial, which is pretty amazing, and trying to
>> get to grips with some of the Houdini workflows here. The first thing he
>> does is creates a GeoSop? But then goes into that node and deletes the
>> contents. Can anyone just briefly explain what the logic is behind what the
>> geosop node is and why the first thing you'd do is remove what's been
>> created by default?
>>
>> Thanks
>> Chris
>>
>>
>> On 27 February 2017 at 22:49, Sven Constable 
>> wrote:
>>
>>> And I should have said "impressive", not "impressing". Sorry.
>>>
>>>
>>>
>>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sven Constable
>>> *Sent:* Monday, February 27, 2017 11:28 PM
>>> *To:* 'Official Softimage Users Mailing List.
>>> https://groups.google.com/forum/#!forum/xsi_list'
>>> *Subject:* RE: A gem of a tutorial
>>>
>>>
>>>
>>> I didn't watch many Houdini tutorials. This is the most impressing one,
>>> I've seen so far. Even the techniques are common in some way, the way they
>>> easily work together is mindblowing.
>>>
>>>
>>>
>>> Sven
>>>
>>>
>>>
>>> *From:* softimage-boun...@listproc.autodesk.com [
>>> mailto:softimage-boun...@listproc.autodesk.com
>>> ] *On Behalf Of *Tim Bolland
>>> *Sent:* Monday, February 27, 2017 1:05 PM
>>> *To:* softimage@listproc.autodesk.com
>>> *Subject:* A gem of a tutorial
>>>
>>>
>>>
>>> http://www.entagma.com/modeling-and-rendering-a-quartz-cryst
>>> al-in-houdini-16/
>>>
>>>
>>>
>>>
>>>
>>> I'm sold.
>>>
>>> --
>>> Softimage Mailing List.
>>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>>> with "unsubscribe" in the subject, and reply to confirm.
>>>
>>
>>
>>
>> --
>> Chris Marshall
>> Mint Motion Limited
>> 029 20 37 27 57
>> 07730 533 115
>> www.mintmotion.co.uk
>> www.dot3d.com
>>
>>
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>



-- 
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Mint Motion Limited
029 20 37 27 57
07730 533 115
www.mintmotion.co.uk
www.dot3d.com
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RE: Need help - Scene crashing on the farm - renders in the UI

[Schoenberger]

 |> 1. Crash was caused by a NULL pointer memory access.
 |> 2. 'A heap has been corrupted.'
I am sorry, but it won't probably help you to know.
They have a bug in the software accessing the memory.
1. They have assigned a random memory segment for a variable, but the 
application did never tell Windows to assign a part of the
memory.
2. Different kind of memory.


>but the scene doesn't render the problem might lie somewhere in ref model 
>deltas or overrrides in passes.
Delete as many other passes as you can, try to delete deltas, delete 
overrrides, delete ref models.
This way you can find out which combination of ref model/delta/pass overrides 
is responsible.


Holger Schönberger
technical director
The day has 24 hours, if that does not suffice, I will take the night




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Re: A gem of a tutorial

[Oscar Juarez]

The geometry SOP is just a container, it is a node that lives in the Object
context of Houdini, much like any object in Softimage. When you dive inside
this node, it would be like going inside the construction stack of
softimage, every node inside could be thought as an operator in the
construction stack. It is not exactly the same but it helps to see it like
that.

He deletes immediately the node, because the default node that comes with
the geometry is the file SOP which allows you to load external geometry,
since he is creating geometry from scratch he doesn't really need it.

Hope it helps.

On Mon, Mar 6, 2017 at 11:31 AM, Chris Marshall 
wrote:

> Hi
> I've been watching this tutorial, which is pretty amazing, and trying to
> get to grips with some of the Houdini workflows here. The first thing he
> does is creates a GeoSop? But then goes into that node and deletes the
> contents. Can anyone just briefly explain what the logic is behind what the
> geosop node is and why the first thing you'd do is remove what's been
> created by default?
>
> Thanks
> Chris
>
>
> On 27 February 2017 at 22:49, Sven Constable 
> wrote:
>
>> And I should have said "impressive", not "impressing". Sorry.
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [mailto:
>> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Sven Constable
>> *Sent:* Monday, February 27, 2017 11:28 PM
>> *To:* 'Official Softimage Users Mailing List.
>> https://groups.google.com/forum/#!forum/xsi_list'
>> *Subject:* RE: A gem of a tutorial
>>
>>
>>
>> I didn't watch many Houdini tutorials. This is the most impressing one,
>> I've seen so far. Even the techniques are common in some way, the way they
>> easily work together is mindblowing.
>>
>>
>>
>> Sven
>>
>>
>>
>> *From:* softimage-boun...@listproc.autodesk.com [
>> mailto:softimage-boun...@listproc.autodesk.com
>> ] *On Behalf Of *Tim Bolland
>> *Sent:* Monday, February 27, 2017 1:05 PM
>> *To:* softimage@listproc.autodesk.com
>> *Subject:* A gem of a tutorial
>>
>>
>>
>> http://www.entagma.com/modeling-and-rendering-a-quartz-
>> crystal-in-houdini-16/
>>
>>
>>
>>
>>
>> I'm sold.
>>
>> --
>> Softimage Mailing List.
>> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
>> with "unsubscribe" in the subject, and reply to confirm.
>>
>
>
>
> --
> Chris Marshall
> Mint Motion Limited
> 029 20 37 27 57
> 07730 533 115
> www.mintmotion.co.uk
> www.dot3d.com
>
>
>
> --
> Softimage Mailing List.
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Re: A gem of a tutorial

[Chris Marshall]

Hi
I've been watching this tutorial, which is pretty amazing, and trying to
get to grips with some of the Houdini workflows here. The first thing he
does is creates a GeoSop? But then goes into that node and deletes the
contents. Can anyone just briefly explain what the logic is behind what the
geosop node is and why the first thing you'd do is remove what's been
created by default?

Thanks
Chris


On 27 February 2017 at 22:49, Sven Constable 
wrote:

> And I should have said "impressive", not "impressing". Sorry.
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [mailto:softimage-bounces@
> listproc.autodesk.com] *On Behalf Of *Sven Constable
> *Sent:* Monday, February 27, 2017 11:28 PM
> *To:* 'Official Softimage Users Mailing List. https://groups.google.com/
> forum/#!forum/xsi_list'
> *Subject:* RE: A gem of a tutorial
>
>
>
> I didn't watch many Houdini tutorials. This is the most impressing one,
> I've seen so far. Even the techniques are common in some way, the way they
> easily work together is mindblowing.
>
>
>
> Sven
>
>
>
> *From:* softimage-boun...@listproc.autodesk.com [mailto:softimage-bounces@
> listproc.autodesk.com ] *On
> Behalf Of *Tim Bolland
> *Sent:* Monday, February 27, 2017 1:05 PM
> *To:* softimage@listproc.autodesk.com
> *Subject:* A gem of a tutorial
>
>
>
> http://www.entagma.com/modeling-and-rendering-a-
> quartz-crystal-in-houdini-16/
>
>
>
>
>
> I'm sold.
>
> --
> Softimage Mailing List.
> To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com
> with "unsubscribe" in the subject, and reply to confirm.
>



-- 
Chris Marshall
Mint Motion Limited
029 20 37 27 57
07730 533 115
www.mintmotion.co.uk
www.dot3d.com
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Need help - Scene crashing on the farm - renders in the UI

[Morten Bartholdy]

I am bumping this one in the hope someone can share some insight on what to 
look for.

I have almost rebuilt the scene, ie. removing all referenced items and 
reimported them and redone all partitioning in various passes, but it still 
crashes on the farm and with xsibatch on a workstation, while rendering in the 
UI render region.

Some additional info:

Softimage crashes if I try merging the scene in to an empty scene.

I can render the various assets being referenced in from their master scenes.

I get two different error messages when crashing for different passes, ie. the 
product and the env:

Product pass (env primary rays off):

R163|  Royal Render checks the return code of the 
executable 
R164|  Executable returned -1073741819 (0x c005) as exit code for frame 
8.
R165| Error: Renderer or plugin contains a bug. Crash was caused by a NULL 
pointer memory access.
R166|  Executable crashed 

env pass (product primary rays off):

R161| +++03.04. 13:52.10 Render Executable done 
+++
R162|  Royal Render checks the return code of the 
executable 
R163|  Executable returned -1073740940 (0x c374) as exit code for frame 
0.
R164|   'A heap has been corrupted.'
R165|  Executable crashed 

Does someone know what these might mean:

1. Crash was caused by a NULL pointer memory access.

2. 'A heap has been corrupted.'

I have never seen them before, and if I had an inkling of an idea what might 
cause them it might be easier to pinpoint the cause of the crash.

I would have liked to avoid rebuilding the scene from scratch redoing passes 
and overrrides, but since the assets individually seem fine, but the scene 
doesn't render the problem might lie somewhere in ref model deltas or 
overrrides in passes.

Thanks.
Morten
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