* Jim Wilson -- Wednesday 04 August 2004 02:55:
Melchior FRANZ said:
[...]
When I noticed that the skids didn't work correctly, I found this VRP bug.
I shifted the model so that the VRP would agree with the YASim origin
and changed the view look-at point accordingly. This fixed the skid
Melchior,
This stuff can get confusing, and I hate to reopen a big can of worms,
and I didn't really pay attention to the JSBsim VRP discussion a while back.
With YAsim you can pick any point as the (0,0,0) point and reference all
your dimensions and positions from there. YAsim handles this
Curtis L. Olson wrote:
Melchior,
This stuff can get confusing, and I hate to reopen a big can of worms,
and I didn't really pay attention to the JSBsim VRP discussion a while
back.
With YAsim you can pick any point as the (0,0,0) point and reference all
your dimensions and positions from
Curt quipped:
If you want to use the same 3d model for multiple FDM configurations
which choose different reference points, then that makes life a lot
harder. I think that is what the JSBsim VRP is for.
I had to laugh when reading these two sentences together. It sort of read ( to me )
Is there a way to create new instances of AIAircraft or
another kind on the fly, just by adding some nodes in
the property tree, or running a command from the telnet
interface, that is, without modifying the source code ?
Is there something planned in this direction ?
Thanks,
-Fred
* Curtis L. Olson -- Wednesday 04 August 2004 13:58:
[...]
Where you might be getting confused is with the view system. If (0,0,0)
is the nose, then all the external views will center around the nose.
[...]
You wrote pretty much the same as Jim, but you obviously didn't read my
response to
Curtis L. Olson wrote:
Hopefully David can answer the implimentation details, but I would like
to point out that in many situations your code can do the expensive
string lookup once at init time, cache the pointer to the node, and from
then on, just use the cached node pointer to read/write the
It's been a long time since I worked on the property system code, and other
people have hacked on it since I've been there, but basically, Curt's right.
Here's a quick overview:
THANK YOU, David! I am just finishing up (this very minute) the loose ends on my
presentation and this information
Is there a way to create new instances of AIAircraft or
another kind on the fly, just by adding some nodes in
the property tree, or running a command from the telnet
interface, that is, without modifying the source code ?
Is there something planned in this direction ?
Now there are two ways
Dave Perry wrote:
1. I updated CVS last night and the changes to the J3 Cub make it
impossible to do a full-stall 3 point landing. 2. It is not true that a
wheel landing should end with applying full down elevator. In fact, you
want to be almost at zero decent rate when the mains touch and
Melchior FRANZ said:
I know. But still, YASim's origin (the nose) is the (unchangeable) VRP, or what
JSBSim calls VRP, right? And the 3D model would also have to be moved such
that the nose is at YASim's 0/0/0, too. But the bo105 does only turn around the
CG if the main *rotor axis* wrongly
Jon Berndt said:
Curt quipped:
If you want to use the same 3d model for multiple FDM configurations
which choose different reference points, then that makes life a lot
harder. I think that is what the JSBsim VRP is for.
I had to laugh when reading these two sentences together. It
* Jim Wilson -- Wednesday 04 August 2004 15:28:
Melchior FRANZ said:
The only difference is JSBSim has the extra feature of specifying the VRP
which is an offset from where 0,0,0 ends up being specified. It saved
changing all the entries for existing flight model configs that had 0,0,0 at
The following is information for all those folks who need
to _selectively_ read looong postings (Hi Arnt !) ;-)
---
Topics in this posting: (Parsing instructions)
1) The first part is about Ron suggesting a specific
FlightGear
Melchior FRANZ wrote:
* Curtis L. Olson -- Wednesday 04 August 2004 13:58:
[...]
Where you might be getting confused is with the view system. If (0,0,0)
is the nose, then all the external views will center around the nose.
[...]
You wrote pretty much the same as Jim, but you obviously
* Curtis L. Olson -- Wednesday 04 August 2004 16:37:
Could this be a bug in the helicopter specific dynamics of YAsim?
Possibly. It could also be a bug in the bo105 yasim config (one that
isn't obvious to me).
That is a relatively new addition and wasn't written by Andy. Can you
reproduce
Melchior FRANZ
Sent: 04 August 2004 14:49
To: [EMAIL PROTECTED]
Subject: [Flightgear-devel] Re: yasim + bo105 + vrp + @#%$#@ == argh!
* Jim Wilson -- Wednesday 04 August 2004 15:28:
Melchior FRANZ said:
The only difference is JSBSim has the extra feature of
specifying the
VRP
* Vivian Meazza -- Wednesday 04 August 2004 16:50:
Well, I don't know. I've just flown it using a recent CVS download. It
looked really good to me. The point of yaw seemed to be just about at the
rotor hub.
Yes, the version from CVS *seems* to behave right. But it has the 3d model
placed
On Tue, 3 Aug 2004 17:48:20 -, Jim wrote in message
[EMAIL PROTECTED]:
Arnt Karlsen said:
On Mon, 02 Aug 2004 16:08:52 +0200, Boris wrote in message
[EMAIL PROTECTED]:
A short message for Arnt !
..Winston Churchill had a great way of having bureaucrats trim
their
On Tue, 03 Aug 2004 18:30:25 +0200, Boris wrote in message
[EMAIL PROTECTED]:
Arnt Karlsen wrote:
On Mon, 02 Aug 2004 16:08:52 +0200, Boris wrote in message
[EMAIL PROTECTED]:
A short message for Arnt !
..Winston Churchill had a great way of having bureaucrats trim
their
Melchior FRANZ
Sent: 04 August 2004 16:05
To: [EMAIL PROTECTED]
Subject: [Flightgear-devel] Re: yasim + bo105 + vrp + @#%$#@ == argh!
* Vivian Meazza -- Wednesday 04 August 2004 16:50:
Well, I don't know. I've just flown it using a recent CVS
download. It
looked really good to me.
On Wednesday 04 August 2004 14:41, Frederic Bouvier wrote:
Is there a way to create new instances of AIAircraft or
another kind on the fly, just by adding some nodes in
the property tree, or running a command from the telnet
interface, that is, without modifying the source code ?
Is there
* Vivian Meazza -- Wednesday 04 August 2004 19:15:
Yes, see what you mean, but I think we went through all this with fixed wing
aircraft. But once fully airborne, it's perfect. Weird. Is it trying to
rotate about a skid?
No, same when airborne, just harder to see. You better use the
Melchior FRANZ said:
Did you put the target offset in the right place, in the right file?
I think so, yes. (Well, I hope so, at least. :-)
Can you post what you have, with the model fixed and the target-offsets in, etc?
Best,
Jim
___
Durk Talsma wrote:
On Wednesday 04 August 2004 14:41, Frederic Bouvier wrote:
Is there a way to create new instances of AIAircraft or
another kind on the fly, just by adding some nodes in
the property tree, or running a command from the telnet
interface, that is, without modifying the
The idea would be to control the AI traffics ( creation, animation and
deletion ) from an external program with the telnet interface.
Someone ask me if it is possible lately, and I think he is prepared
to do the required changes. I already suggested him to design new
commands for
On Wednesday 04 August 2004 20:54, Frederic Bouvier wrote:
The idea would be to control the AI traffics ( creation, animation and
deletion ) from an external program with the telnet interface.
Someone ask me if it is possible lately, and I think he is prepared
to do the required changes. I
* Jim Wilson -- Wednesday 04 August 2004 20:49:
Can you post what you have, with the model fixed and the target-offsets in, etc?
Was already as attached to my first reply to Curt's message as diff.
I'll send it again privately, just in case. :-)
m.
Melchior FRANZ wrote
Sent: 04 August 2004 19:22
To: [EMAIL PROTECTED]
Cc: Maik Justus
Subject: [Flightgear-devel] Re: yasim + bo105 + vrp + @#%$#@ == argh!
* Vivian Meazza -- Wednesday 04 August 2004 19:15:
Yes, see what you mean, but I think we went through all this with
fixed
The sender would like to recall the message, [Flightgear-devel] CVS - problem.attachment: winmail.dat___
Flightgear-devel mailing list
[EMAIL PROTECTED]
http://mail.flightgear.org/mailman/listinfo/flightgear-devel
2f585eeea02e2c79d7b1d8c4963bae2d
Vivian Meazza wrote:
The sender would like to recall the message, [Flightgear-devel] CVS - problem.
Next time just attach a string to the message before you click send,
then you can pull it back later if you need to. Most modern mail
clients allow you to add attachments.
Regards,
Curt.
--
* Vivian Meazza -- Wednesday 04 August 2004 22:35:
I think all views are fine, although view 2 is a bit disconcerting or even a
bit disorientating. This seems to be a view-based issue. I'm convinced that
the aircraft is rotating appoximately around it's cofg.
This is *not* a view-based issue.
Melchior FRANZ wrote:
* Vivian Meazza -- Wednesday 04 August 2004 22:35:
I think all views are fine, although view 2 is a bit disconcerting or even a
bit disorientating. This seems to be a view-based issue. I'm convinced that
the aircraft is rotating appoximately around it's cofg.
This is
* Curtis L. Olson -- Wednesday 04 August 2004 22:58:
Perhaps you could export some of the FDM data (position, orientation,
etc.) into a text file and graph it. If you approached the problem
carefully, you should be able to get to the bottom of exactly what is
going on.
Good idea. I'll try
On Wed, 4 Aug 2004 23:04:16 +0200
Melchior FRANZ [EMAIL PROTECTED] wrote:
Good idea. I'll try that. Thanks.
Get some sleep, first !!
:-)
Jon
___
Flightgear-devel mailing list
[EMAIL PROTECTED]
http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Curtis L. Olson
Sent: 04 August 2004 21:43
To: FlightGear developers discussions
Subject: Re: Recall: [Flightgear-devel] CVS - problem
Vivian Meazza wrote:
The sender would like to recall the message,
[Flightgear-devel] CVS -
problem.
Next time just attach a string to the
* Jon S Berndt -- Wednesday 04 August 2004 23:12:
On Wed, 4 Aug 2004 23:04:16 +0200
Melchior FRANZ [EMAIL PROTECTED] wrote:
Good idea. I'll try that. Thanks.
Get some sleep, first !!
Hehe ... OK. It won't be a lot of fun, anyway. I should trace both
origin and CG in lon/lat. Have to
Melchior FRANZ said:
* Jim Wilson -- Wednesday 04 August 2004 20:49:
Can you post what you have, with the model fixed and the target-offsets
in, etc?
attached
m.
That looks fine (at least from pitch and roll angles). It is off a little
bit because the model offsets (in the
http://www.airandspacemagazine.com/asm/web/site/QT/menu.html
___
Flightgear-devel mailing list
[EMAIL PROTECTED]
http://mail.flightgear.org/mailman/listinfo/flightgear-devel
2f585eeea02e2c79d7b1d8c4963bae2d
39 matches
Mail list logo
