|
mataps, Newbie
Posted: 20 April 2013 07:33 AM Total Posts: 9
Hello away3d team,
Im trying to animate my md5 mesh manually, as my starting point I want to copy the SkeletonJoint’s orientation and translation to JointPose, but I came accross the issue where I could’nt find anything useful from SkeletonJoints properties. So my initial thought is that SkeletonJoints stored the orientation and translation in the inverseBindPose property, but when I tried to decompose it my model got screwed. Im not very good in Math and English so I think it’s better if i show my code  .
private function onAssetComplete(event:AssetEvent):void
{
if (event.asset.assetType == AssetType.ANIMATION_SET)
{
animationSet = event.asset as SkeletonAnimationSet;
//build the animator
animator = new SkeletonAnimator(animationSet, skeleton);
//build the skeletonPose for custom animation
skeletonPose = new SkeletonPose();
//create a jointPose for each joint ( clone :D );
for(var i:int = 0; i < skeleton.joints.length; i++)
{
var jointPose:JointPose = new JointPose();
jointPose.name = skeleton.joints[i].name;
var matrix3D:Matrix3D = new Matrix3D();
matrix3D.copyRawDataFrom(skeleton.joints[i].inverseBindPose);
matrix3D.invert();
var decomposedMatrix:Vector.<Vector3D> = matrix3D.decompose(Orientation3D.QUATERNION);
jointPose.translation.copyFrom(decomposedMatrix[0]);
jointPose.orientation.fromMatrix(matrix3D);
skeletonPose.jointPoses.push(jointPose);
}
//create a new clip and add it to animationSet
var skeletonClip:SkeletonClipNode = new SkeletonClipNode();
skeletonClip.stitchFinalFrame = true;
//add 2 frames since it will throw an error only 1 frame is added
skeletonClip.addFrame(skeletonPose, 1000);
skeletonClip.addFrame(skeletonPose, 1000);
skeletonClip.name = "myAnim";
//finally add the clip to the animationSet :)
animationSet.addAnimation(skeletonClip);
mesh.animator = animator;
animator.play("myAnim");
}
}
I’ve searched google and other posts and I always find people struggling on this king of issue but nothing works for them. Hope that you will kindly answer my question. Thanks
|
CbbK, Newbie
Posted: 22 April 2013 05:30 PM Total Posts: 13
[ # 1 ]
Hi mataps, I’m working on the exact same topic and I also have problems with it, did you find a way to control the Skeleton programaticaly?
|
mataps, Newbie
Posted: 26 April 2013 08:15 AM Total Posts: 9
[ # 2 ]
Hello CbbK, I still struggling with this problem. From reading the md5 specs, I found out that md5 stores skeleton coordinates in global position so I’m thinking of finding a way to convert global coordinates to Mesh’s local and I think in that way I can obtain the correct orientation and translation. But, for now the only workaround that i’m using is, making an animation of the skin’s default Pose (ie. steady Pose) and importing it to away3d, and by loading the steady animation I’m able to get the skeleton’s correct Pose. I hope that helps :D, if you find the way around this. Please do share it with this forum so that it would be easy for other newbies to find the solution :D. Thanks!
|
|
mataps, Newbie
Posted: 26 April 2013 09:21 AM Total Posts: 9
[ # 4 ]
Ok, we’re on the same track as of now :D ...but i’m looking forward in converting skeleton/joint’s orientation and translation manually (ie. without having to load an existing animation to get the Skeleton’s pose). I hope that make sense .
|
CbbK, Newbie
Posted: 26 April 2013 09:47 AM Total Posts: 13
[ # 5 ]
That’s great then, I hope you can help each other
Just to know, what’s the final goal you’re trying to achieve? For me, I’m trying to do make the skeleton’s arms point at a dynamic position, like Tomb Raider first of it’s name, you have Lara’s animation holding her guns and her arms moving with her target.
I saw the SkeletonDifferenceNode, i don’t realy understand how it works and didn’t have much time to try, but I’ll try to combine 2 animations : first would be “holding the gun”, the other “pointAt”. What I don’t know is how I must fill the SkeletonPose in the “pointAt” Node, I’ll try to fill it with null JointPose, or JointPose with 0 translation 0 rotation for all Joint that should not be animated, and hope that Away3D will do skeletonPose = skeletonPose(“holding the gun”) + skeletonPose(“pointAt”).
|
CbbK, Newbie
Posted: 26 April 2013 11:23 AM Total Posts: 13
[ # 6 ]
And it worked like a charm! :D
The solution to my problem was exactly skeletonPose = skeletonPose(“holding the gun”) + skeletonPose(“pointAt”). I didn’t use the SkeletonDifferenceNode as it may have a different purpose (interpolate between 2 states).
Instead I wrote 2 classes : SkeletonAdditiveNode and SkeletonAdditiveState (attached)
Used like that :
_skeletonAimAtNode = new AimAtSkeletonClipNode();
_skeletonAdditiveNode = new SkeletonAdditiveNode();
_skeletonAdditiveNode.leftOperand = _animationSet.getAnimation(WALK_ANIM);
_skeletonAdditiveNode.rightOperand = _skeletonAimAtNode;
_skeletonAdditiveNode.name = AIM_ANIM;
_animationSet.addAnimation(_skeletonAdditiveNode);
_animator.play(AIM_ANIM, _stateTransition);
It does the addition of my AimAtSkeletonClipNode (which creates a Pose with the required translation and orientation changes) and the WALK_ANIM.
File Attachments
|
SuperSam, Sr. Member
Posted: 26 April 2013 09:04 PM Total Posts: 102
[ # 7 ]
That’s pretty interesting ! And it’s very nice to post what you’ve done so far, thanks, that helps to get a better grab on the framework.
Unfortunately your attachments won’t download, they’re a blank page. :/
|
CbbK, Newbie
Posted: 26 April 2013 10:14 PM Total Posts: 13
[ # 8 ]
I updated the attachment. I hope it’ll help you.
|
mataps, Newbie
Posted: 27 April 2013 03:31 PM Total Posts: 9
[ # 9 ]
Thank you so much for your help. What I want to achieve is something like skeleton debugger UI, that will display all the bones and will try to control it with click and drag(ie. something like 3d software does) and add some frames, I noticed also SkeletonDifference class and I think it is used by Away3d bone animation interpolation thing . Anyway I hope I can do an experiment with your code. I will try this out as soon as I finish doing my current project. I will post some updates here on what I’ve figured out so far. And hopefully i’ll be able to share my code with you guys :D. Cheers!
|
