Scripting Animation Layers

[André Adam <a_adam(at)49games.de>]

Heya,

what are people's experiences with scripting Animation Layers? I'm just 
in the middle of designing an offset system and have to plot IK driven 
animation on top of an FK layer.

*Any* attempt to do a simple SaveKey() inside of a cycle fails 
miserably, the plottet offsets make no sense at all. *However*, if I 
move the timeline manually (oPlayCtrl.Parameters("Current").Value = 
blabla) and call a Refresh() from within the cycle, it works. This must 
be the most ugly code ever; is this a bug, really meant to work like 
this or me not getting something? To my understanding the offset keys 
are solved through the interface?

Thanks in advance if anybody has a little bit of experience to share 
with this new feature's internals. Oh, and a bit of repro code below...

Cheers!

   -André


//1: Build and animate a skeleton:

//Create Skeleton
Create2DSkeleton(0, 0, 0, 0, 1, -3, 0, 90, 0, 4);
AppendBone("eff", 0, 0, -6);
//Key FK Animation
SaveKey("bone.kine.local.rotx,bone.kine.local.roty,bone.kine.local.rotz,bone1.kine.local.rotx,bone1.kine.local.roty,bone1.kine.local.rotz", 
1);
Rotate("bone", 50, 0, 0, siRelative, siGlobal, siObj, siXYZ);
Rotate("bone1", -100, 0, 0, siRelative, siGlobal, siObj, siXYZ);
SaveKey("bone.kine.local.rotx,bone.kine.local.roty,bone.kine.local.rotz,bone1.kine.local.rotx,bone1.kine.local.roty,bone1.kine.local.rotz", 
100);
//Key Effector, overriding the FK animation
SaveKey("eff.kine.local.posx,eff.kine.local.posy,eff.kine.local.posz", 1);
Translate("eff", 3, -1.5, 3, siRelative, siGlobal, siObj, siXYZ);
SaveKey("eff.kine.local.posx,eff.kine.local.posy,eff.kine.local.posz", 100);
AddAnimationLayer("Scene_Root");
SelectObj("bone,bone1");

//2.: Trying to plot the delta between FK and IK the straight forward 
way, does not work:

function fPlotRotationOffsets(cObjs, aInOut){
 var cKeyParams = new ActiveXObject("XSI.Collection");
 var eObjs = new Enumerator(cObjs);
 while(!eObjs.atEnd()){
   cKeyParams.Add(eObjs.item().RotX);
   cKeyParams.Add(eObjs.item().RotY);
   cKeyParams.Add(eObjs.item().RotZ);
   eObjs.moveNext();
 }
 for(var i=aInOut[0]; i<aInOut[1]+1; i++){
   SaveKey(cKeyParams.GetAsText(), i, null, -1, -1, false);
 }
}
fPlotRotationOffsets(Selection, new Array(1,100));

//3.: I have to do this instead:

function fPlotRotationOffsets(cObjs, aInOut){
 var cKeyParams = new ActiveXObject("XSI.Collection");
 var eObjs = new Enumerator(cObjs);
 while(!eObjs.atEnd()){
   cKeyParams.Add(eObjs.item().RotX);
   cKeyParams.Add(eObjs.item().RotY);
   cKeyParams.Add(eObjs.item().RotZ);
   eObjs.moveNext();
 }
 var oPlayCtrl = ActiveProject.Properties.Find("PlayControl");
 for(var i=aInOut[0]; i<aInOut[1]+1; i++){
   oPlayCtrl.Parameters("Current").Value = i; //Bad!
   Refresh(); //Even worse!
   SaveKey(cKeyParams.GetAsText());
 }
}
fPlotRotationOffsets(Selection, new Array(1,100))














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