Re: Plotting keyframe faster....

[Julien Stiegler <julien.stiegler(at)free.fr>]

Hello Andy,

yes i did something like this with a startParticle , endParticle and 
increment variables.
Each frame adding 3 float keys on 5000 objects is ... 15000 keyframes it 
is alredy slowing down xsi from the first frame.
So i could do it particle chunks not time chunks but i could also take 
just 1 of 2 particles.
Finally i had to reduce by half the n° of particles using this 
increment, even though i didn't keep anythin in memory between frames.
Because in fact xsi particle system is pretty fast, and big number of 
animated objects, pretty slow..

best regards

Andy Jones wrote:

> I think the usual solution to not being able to allocate a big enough 
> array for something like this is to break it up into chunks.  So, 
> instead of frame-by-frame, you do, like 100 frames-by-100 frames.  So, 
> you'd just keep the text file open, read 100 lines into the array, put 
> them on the curve, read the next 100 lines, put them on the curve, 
> etc.  A little more coding, but it should be workable.
>
> - Andy
>
> Julien Stiegler wrote:
>
> > Salut Guillaume,
> >
> > using array is fast like the PlotParticle script.
> > But it takes too much memory to store the whole sequence in an array 
> > in one row.
> > I had to bake a 500 frame simulation with 5000 fish and had to write 
> > a frame by frame script because PlotParticle (array based) script 
> > would crash (due to memory)
> >
> > Anyway there is so many keyframes to store, it's really slow....
> >
> > best regards.
> >
> >
> > Guillaume Laforge wrote:
> >
> > > Hi Raffaele,
> > >
> > > I made a test with object model and it looks really fast.
> > >
> > > Code Snipet :
> > > for(var i=0; i<100; i++)
> > > {
> > >     // Create a null
> > >     var nullobj = ActiveSceneRoot.AddNull();
> > >
> > >     //position
> > >     var posxArray = [0,5,10,50];
> > >     var posyArray = [0,7,9,500];
> > >     var poszArray = [0,15,9,12];
> > >
> > >     CreateCurveThenAddKeys( nullobj.posx, posxArray );
> > >     CreateCurveThenAddKeys( nullobj.posy, posyArray );
> > >     CreateCurveThenAddKeys( nullobj.posz, posyArray );
> > > }
> > >
> > > function CreateCurveThenAddKeys( channel, arrayValues )
> > > {
> > >     // Create empty fcurves
> > >     var fcurve = channel.AddFCurve();
> > >
> > >     // Define the number of keys
> > >     var nbkeys = arrayValues.length ;
> > >
> > >     // Start editing the fcurve
> > >     fcurve.BeginEdit();
> > >
> > >     // Add keys to the fcurve
> > >     for ( var i=0; i<nbkeys; i++ )
> > >     {
> > >        fcurve.AddKey( i, arrayValues[i] );
> > >     }
> > >
> > >     //End editing the fcurves and put the undo event onto     // the 
> > > undo/redo stack
> > >     fcurve.EndEdit();
> > >     
> > >     return fcurve;
> > > }
> > >
> > >
> > >
> > > Cheers
> > >
> > > --
> > > Guillaume Laforge | La Maison
> > >
> > >
> > >
> > > On Tue, 24 Jul 2007 14:31:10 -0400 (EDT), Raffaele Scaduto-Medola 
> > > <raffaele(at)inch.com> wrote:
> > >  
> > >
> > > > Hello all,
> > > >
> > > > I was wondering if anyone on the list might have run into this problem
> > > > before.
> > > > I am trying to apply some x,y,z position values to a set of nulls, and
> > > > keyframe that set of nulls. Unfortunately, the technique I am using 
> > > > now
> > > > (with JScript is still slow). But I was wondering if anyone might 
> > > > have a
> > > > faster "object" based approach to applying and keyframing data onto a
> > > > group of null (or any objects).
> > > >
> > > > Right now I use
> > > >
> > > > var $o_obj = ActiveSceneRoot.findChild("null128") ;
> > > >
> > > > //============================================== set x,y,z position
> > > > $o_obj.Kinematics.Global.Parameters("posx").value = $valueX ;
> > > > $o_obj.Kinematics.Global.Parameters("posy").value = $valueY ;
> > > > $o_obj.Kinematics.Global.Parameters("posz").value = $valueZ ;
> > > >
> > > > //============================================== save the keyframe
> > > > savekeyOnKeyable($o_obj, $frame );
> > > >
> > > >
> > > > The problem is I have to do 266 of this operation for 300-500 frames.
> > > > If anyone knows a faster technique I could use, any hints and 
> > > > sample code
> > > > would be much appreciated.
> > > >
> > > >
> > > >
> > > > THX
> > > > RSM
> > > >
> > > > _____________________________________________________
> > > > Raffaele Scaduto-Mendola - www.turbolinea.com
> > > >                raffaele(at)turbolinea.com
> > > > -
> > > >   
> > >
> > >
> > >
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> > >
> > >
> > >  
>
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