Very cool! So amazing to see this in Softimage! :)
Regards,
Simon
On 3 May 2012 09:55, Ahmidou Lyazidi <ahmidou....@gmail.com> wrote:
> Hi Jo, and thanks for the snipet!
> I already have a structure not that far, but my problem is elsewhere. The
> fcurves's tangents interpretation in 3d is not a simple mapping of the X,Y
> values.
> I also had to deal with fcurves that don't have necessary three keys a the
> same time but only one or two, so I don't have all the information to draw
> the tangents as they should be.
> But I think I'm near the solution, I just have to restructure some part of
> my code to make it more efficient and test :)
>
> Best regards
> A.
>
> 2012/4/30 jo benayoun <jobenay...@gmail.com>
>
>> Hi Ahmidou,
>> looks quite nice ! :)
>>
>> For your problem, I would go in c by reproducing a kinda structure that
>> mimic FCurves ones like the following.
>>
>> """
>> struct bezfragments {
>> double cps[4][3];
>> uint_t interp;
>> };
>>
>> struct motionpath {
>> constchar_t *source;
>> ushort_t color[3];
>> uint_t flags;
>> uint_t nbezfragments;
>> struct bezfragments *[1];
>> };
>> """
>>
>> A MotionPath as a FCurve is a fixed length array of bezier curves with
>> some extra informations like the object which is the source, the color of
>> the path and some other flags for ui convenience (selection mode, ...).
>> You have the choice to represent your bezier segments by pairing control
>> points by 3 or by 4, I dont think it makes a huge difference.
>> This system coupled with a "MotionPathManager" will avoid you to have to
>> query the softimage API each time you need to redraw your viewport as your
>> datas are cached in memory.
>> Also, by subscripting to any event like "siOnValueChange", you will be
>> able to rebuild a motion path targeting just what you need. Also a good
>> point for perfs.
>> Anyways .... Here is a little pysnippet (I dont have the possibility to
>> write it in C right now) ! It should I hope answer to your first question !
>> :)
>>
>> jo
>>
>>
>> """
>> # Im quite sure gmail will eat my indent efforts so take care about that !
>> # Each key for each params must have a buddy on the others axes.
>> # Create a cube, animate its pos's being sure a key is set at the same
>> frame for the three axes.
>> #
>>
>> import random
>>
>>
>> class BezFragment(object):
>> cpoints = tuple()
>> interp = int()
>>
>> class MotionPath(object):
>> source = str()
>> color = tuple()
>> bezfragments = tuple()
>>
>>
>> def build_axis_data(param):
>> keys = tuple(param.Source.Keys)
>> res = list()
>> bfrag = None
>> i = 0
>>
>> while i < (len(keys)-1):
>> cp = list()
>>
>> key = keys[i]
>> nextkey = keys[i+1]
>> cp.append(round(key.Value, 1))
>> cp.append(round(key.Time, 1))
>> cp.append(round(key.Value + key.LeftTanX, 1))
>> cp.append(round(key.Time + key.LeftTanY, 1))
>> cp.append(round(nextkey.Value - key.RightTanY, 1))
>> cp.append(round(nextkey.Time - key.RightTanX, 1))
>> cp.append(round(nextkey.Value, 1))
>> cp.append(round(nextkey.Time, 1))
>>
>> bfrag = BezFragment()
>> res.append(bfrag)
>> bfrag.interp = key.Interpolation
>> bfrag.cpoints = tuple(cp)
>>
>> i += 1
>>
>> return tuple(res)
>>
>>
>> def build_motion_path(siobj):
>> x = build_axis_data(siobj.Kinematics.Local.posx)
>> y = build_axis_data(siobj.Kinematics.Local.posy)
>> z = build_axis_data(siobj.Kinematics.Local.posz)
>>
>> mp = MotionPath()
>> mp.source = siobj.FullName
>> mp.color = (random.randint(120, 255), random.randint(120, 255),
>> random.randint(120, 255),
>> )
>> mp.bezfragments = tuple(zip(x, y, z))
>> return mp
>>
>>
>> def log_bezfragment(bfrag):
>> msg = "{0}:({1}, {2})---o ({3}, {4}) ({5}, {6})o---({7}, {8})\n" \
>> " \______________________________________/"
>> print msg.format("", *bfrag.cpoints)
>> return None
>>
>>
>> def log_obj_motionpath():
>> for obj in Application.Selection:
>> mp = build_motion_path(obj)
>>
>> print "source: {0}".format(mp.source)
>> print "mp-color: {0}".format(mp.color)
>> for bezf in mp.bezfragments:
>> print "\ncp"
>> for xyz in bezf:
>> log_bezfragment(xyz)
>> return None
>>
>>
>> log_obj_motionpath()
>>
>> """
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> 2012/4/30 Ahmidou Lyazidi <ahmidou....@gmail.com>
>>
>>> I think I got it :)
>>>
>>>
>>> 2012/4/30 Halim Negadi <hneg...@gmail.com>
>>>
>>>> Looks awesome Ahmidou, can't wait to play with it.
>>>> Cheers,
>>>> H.
>>>>
>>>>
>>>> On Mon, Apr 30, 2012 at 4:44 PM, Ahmidou Lyazidi <ahmidou....@gmail.com
>>>> > wrote:
>>>>
>>>>> Well, as soon as I have resolved the tangent handle stuff :) I'm sure
>>>>> it's simple, but I can't get it...
>>>>>
>>>>>
>>>>> 2012/4/30 Philip Melancon <philip.melan...@modusfx.com>
>>>>>
>>>>>> This is looking amazing, do you have an idea of when/how you plan to
>>>>>> release this nice little piece of animation goodness? I know that the
>>>>>> animators I work with would kill for something like this!
>>>>>>
>>>>>> Philip Melancon
>>>>>> Lead Crowd TD
>>>>>> Modus FX
>>>>>>
>>>>>>
>>>>>> On 4/30/2012 10:30 AM, Xavier Lapointe wrote:
>>>>>>
>>>>>> Whoa, this is awesome.
>>>>>>
>>>>>> I feel some animators out there are probably jubilating right now
>>>>>> :)
>>>>>>
>>>>>> No virus found in this message.
>>>>>> Checked by AVG - www.avg.com
>>>>>> Version: 2012.0.1913 / Virus Database: 2411/4969 - Release Date:
>>>>>> 04/30/12
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Ahmidou Lyazidi
>>>>> Director | TD | CG artist
>>>>> http://vimeo.com/ahmidou/videos
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Ahmidou Lyazidi
>>> Director | TD | CG artist
>>> http://vimeo.com/ahmidou/videos
>>>
>>>
>>
>
>
> --
> Ahmidou Lyazidi
> Director | TD | CG artist
> http://vimeo.com/ahmidou/videos
>
>
