SkeletonJoint getJoint(Element jointNode, boolean isRootNode) {
SkeletonJoint joint = new SkeletonJoint();
joint.name = jointNode.getAttribute("id");
if (!isRootNode) {
Element matrixElement = jointNode.getChildByName("matrix");
if (matrixElement != null) {
Matrix4 m = getMatrix(matrixElement);
m.getTranslation(joint.position);
m.getRotation(joint.rotation);
// TODO: get scale from matrix
}
}
Array<Element> nodes = jointNode.getChildrenByName("node");
for (int i = 0; i < nodes.size; i++) {
SkeletonJoint child = getJoint(nodes.get(i), false);
if (!isRootNode) {
child.parent = joint;
}
joint.children.add(child);
}
return joint;
}
private Skeleton generateSkeleton(
com.badlogic.gdx.graphics.g3d.loaders.ogre.skeleton.Skeleton ogreSkel) {
List<Bone> bones = ogreSkel.getBones().getBone();
List<SkeletonJoint> joints = new ArrayList<SkeletonJoint>();
Map<String, SkeletonJoint> nameToJoint = new HashMap<String, SkeletonJoint>();
for (int i = 0; i < bones.size(); i++) {
Bone bone = bones.get(i);
SkeletonJoint joint = new SkeletonJoint();
joint.name = bone.name;
joint.position.set(bone.position.x, bone.position.y, bone.position.z);
joint.rotation.setFromAxis(
bone.rotation.axis.x,
bone.rotation.axis.y,
bone.rotation.axis.z,
MathUtils.radiansToDegrees * bone.rotation.angle);
if (bone.scale != null) {
if (bone.scale.factor == 0) joint.scale.set(bone.scale.x, bone.scale.y, bone.scale.z);
else joint.scale.set(bone.scale.factor, bone.scale.factor, bone.scale.factor);
}
joints.add(joint);
nameToJoint.put(joint.name, joint);
}
List<Boneparent> hierarchy = ogreSkel.getBonehierarchy().getBoneparent();
for (int i = 0; i < hierarchy.size(); i++) {
Boneparent link = hierarchy.get(i);
SkeletonJoint joint = nameToJoint.get(link.getBone());
SkeletonJoint parent = nameToJoint.get(link.getParent());
parent.children.add(joint);
joint.parent = parent;
}
Skeleton skel = new Skeleton();
for (int i = 0; i < joints.size(); i++) {
SkeletonJoint joint = joints.get(i);
if (joint.parent == null) skel.hierarchy.add(joint);
}
skel.buildFromHierarchy();
List<Animation> animations = ogreSkel.getAnimations().getAnimation();
for (int i = 0; i < animations.size(); i++) {
Animation animation = animations.get(i);
SkeletonKeyframe[][] perJointkeyFrames = new SkeletonKeyframe[skel.bindPoseJoints.size][];
List<Track> tracks = animation.getTracks().getTrack();
if (tracks.size() != perJointkeyFrames.length)
throw new IllegalArgumentException("Number of tracks does not equal number of joints");
Matrix4 rotation = new Matrix4();
Matrix4 transform = new Matrix4();
for (int j = 0; j < tracks.size(); j++) {
Track track = tracks.get(j);
String jointName = track.getBone();
int jointIndex = skel.namesToIndices.get(jointName);
if (perJointkeyFrames[jointIndex] != null)
throw new IllegalArgumentException(
"Track for bone "
+ jointName
+ " in animation "
+ animation.name
+ " already defined!");
SkeletonKeyframe[] jointKeyFrames =
new SkeletonKeyframe[track.getKeyframes().getKeyframe().size()];
perJointkeyFrames[jointIndex] = jointKeyFrames;
for (int k = 0; k < track.getKeyframes().getKeyframe().size(); k++) {
Keyframe keyFrame = track.getKeyframes().getKeyframe().get(k);
SkeletonKeyframe jointKeyframe = new SkeletonKeyframe();
jointKeyframe.timeStamp = keyFrame.time;
jointKeyframe.position.set(
keyFrame.translate.x, keyFrame.translate.y, keyFrame.translate.z);
if (keyFrame.scale != null) {
if (keyFrame.scale.factor == 0)
jointKeyframe.scale.set(keyFrame.scale.x, keyFrame.scale.y, keyFrame.scale.z);
else
jointKeyframe.scale.set(
keyFrame.scale.factor, keyFrame.scale.factor, keyFrame.scale.factor);
}
jointKeyframe
.rotation
.setFromAxis(
keyFrame.rotate.axis.x,
keyFrame.rotate.axis.y,
keyFrame.rotate.axis.z,
MathUtils.radiansToDegrees * keyFrame.rotate.angle)
.nor();
jointKeyframe.parentIndex = skel.bindPoseJoints.get(jointIndex).parentIndex;
jointKeyFrames[k] = jointKeyframe;
rotation.set(jointKeyframe.rotation);
rotation.trn(jointKeyframe.position);
transform.set(skel.sceneMatrices.get(jointIndex));
transform.mul(rotation);
if (jointKeyframe.parentIndex != -1) {
rotation.set(skel.offsetMatrices.get(jointKeyframe.parentIndex)).mul(transform);
transform.set(rotation);
}
transform.getTranslation(jointKeyframe.position);
transform.getRotation(jointKeyframe.rotation);
}
}
for (int j = 0; j < perJointkeyFrames.length; j++) {
if (perJointkeyFrames[j] == null)
throw new IllegalArgumentException("No track for bone " + skel.jointNames.get(j));
}
skel.animations.put(
animation.name,
new SkeletonAnimation(animation.name, animation.length, perJointkeyFrames));
}
return skel;
}