/**
* Constructor. Creates the basic set of bone's data.
*
* @param boneStructure the bone's structure
* @param parent bone's parent (null if the bone is the root bone)
* @param objectToArmatureMatrix object-to-armature transformation matrix
* @param bonesPoseChannels a map of pose channels for each bone OMA
* @param blenderContext the blender context
* @throws BlenderFileException an exception is thrown when problem with blender data reading
* occurs
*/
private BoneContext(
Structure boneStructure,
BoneContext parent,
Matrix4f objectToArmatureMatrix,
final Map<Long, Structure> bonesPoseChannels,
BlenderContext blenderContext)
throws BlenderFileException {
this.parent = parent;
this.boneStructure = boneStructure;
boneName = boneStructure.getFieldValue("name").toString();
ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
armatureMatrix = objectHelper.getMatrix(boneStructure, "arm_mat", true);
fixUpAxis = blenderContext.getBlenderKey().isFixUpAxis();
this.computeRestMatrix(objectToArmatureMatrix);
List<Structure> childbase =
((Structure) boneStructure.getFieldValue("childbase")).evaluateListBase(blenderContext);
for (Structure child : childbase) {
this.children.add(
new BoneContext(child, this, objectToArmatureMatrix, bonesPoseChannels, blenderContext));
}
poseChannel = bonesPoseChannels.get(boneStructure.getOldMemoryAddress());
blenderContext.setBoneContext(boneStructure.getOldMemoryAddress(), this);
}
@Override
public void performBakingOperation() {
Bone owner = blenderContext.getBoneContext(ownerOMA).getBone();
Bone target = null;
if (targetArmatureOMA != null) { // first make sure the target is loaded
ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
try {
objectHelper.toObject(
(Structure)
blenderContext.getLoadedFeature(
targetArmatureOMA, LoadedFeatureDataType.LOADED_STRUCTURE),
blenderContext);
} catch (BlenderFileException e) {
LOGGER.warning(
"Problems occured during target object loading. The constraint "
+ name
+ " will not be applied.");
return;
}
BoneContext boneContext = blenderContext.getBoneByName(subtargetName);
target = boneContext.getBone();
this.targetOMA = boneContext.getBoneOma();
}
this.prepareTracksForApplyingConstraints();
AnimData animData = blenderContext.getAnimData(ownerOMA);
if (animData != null) {
for (Animation animation : animData.anims) {
Transform ownerTransform = constraintHelper.getBoneTransform(ownerSpace, owner);
Transform targetTransform =
target != null ? constraintHelper.getBoneTransform(targetSpace, target) : null;
BoneTrack boneTrack = constraintHelper.getTrack(owner, animData.skeleton, animation);
BoneTrack targetTrack =
target != null ? constraintHelper.getTrack(target, animData.skeleton, animation) : null;
constraintDefinition.bake(
ownerTransform, targetTransform, boneTrack, targetTrack, this.ipo);
}
}
}
/**
* This method builds the bone. It recursively builds the bone's children.
*
* @param bones a list of bones where the newly created bone will be added
* @param boneOMAs the map between bone and its old memory address
* @param blenderContext the blender context
* @return newly created bone
*/
public Bone buildBone(List<Bone> bones, Map<Bone, Long> boneOMAs, BlenderContext blenderContext) {
Long boneOMA = boneStructure.getOldMemoryAddress();
bone = new Bone(boneName);
bones.add(bone);
boneOMAs.put(bone, boneOMA);
blenderContext.addLoadedFeatures(boneOMA, boneName, boneStructure, bone);
Matrix4f pose = this.restMatrix.clone();
ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
Vector3f poseLocation = pose.toTranslationVector();
Quaternion rotation = pose.toRotationQuat();
Vector3f scale = objectHelper.getScale(pose);
bone.setBindTransforms(poseLocation, rotation, scale);
for (BoneContext child : children) {
bone.addChild(child.buildBone(bones, boneOMAs, blenderContext));
}
this.computePoseTransform();
return bone;
}
/**
* This constructor reads animation data from the object structore. The stored data is the
* AnimData and additional data is armature's OMA.
*
* @param objectStructure the structure of the object
* @param modifierStructure the structure of the modifier
* @param blenderContext the blender context
* @throws BlenderFileException this exception is thrown when the blender file is somehow
* corrupted
*/
public ArmatureModifier(
Structure objectStructure, Structure modifierStructure, BlenderContext blenderContext)
throws BlenderFileException {
if (this.validate(modifierStructure, blenderContext)) {
Pointer pArmatureObject = (Pointer) modifierStructure.getFieldValue("object");
if (pArmatureObject.isNotNull()) {
ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
ArmatureHelper armatureHelper = blenderContext.getHelper(ArmatureHelper.class);
Structure armatureObject =
pArmatureObject.fetchData(blenderContext.getInputStream()).get(0);
this.armatureObjectOMA = armatureObject.getOldMemoryAddress();
// read skeleton
// changing bones matrices so that they fit the current object
Structure armatureStructure =
((Pointer) armatureObject.getFieldValue("data"))
.fetchData(blenderContext.getInputStream())
.get(0);
Structure bonebase = (Structure) armatureStructure.getFieldValue("bonebase");
List<Structure> bonesStructures = bonebase.evaluateListBase(blenderContext);
for (Structure boneStructure : bonesStructures) {
BoneTransformationData rootBoneTransformationData =
armatureHelper.readBoneAndItsChildren(boneStructure, null, blenderContext);
armatureHelper.addBoneDataRoot(rootBoneTransformationData);
}
Matrix4f armatureObjectMatrix = objectHelper.getTransformationMatrix(armatureObject);
Matrix4f inverseMeshObjectMatrix =
objectHelper.getTransformationMatrix(objectStructure).invert();
Matrix4f additionalRootBoneTransformation =
inverseMeshObjectMatrix.multLocal(armatureObjectMatrix);
Bone[] bones =
armatureHelper.buildBonesStructure(Long.valueOf(0L), additionalRootBoneTransformation);
// read mesh indexes
Structure meshStructure =
((Pointer) objectStructure.getFieldValue("data"))
.fetchData(blenderContext.getInputStream())
.get(0);
this.meshOMA = meshStructure.getOldMemoryAddress();
this.readVerticesWeightsData(objectStructure, meshStructure, blenderContext);
// read animations
ArrayList<Animation> animations = new ArrayList<Animation>();
List<FileBlockHeader> actionHeaders =
blenderContext.getFileBlocks(Integer.valueOf(FileBlockHeader.BLOCK_AC00));
if (actionHeaders != null) { // it may happen that the model has armature with no actions
for (FileBlockHeader header : actionHeaders) {
Structure actionStructure = header.getStructure(blenderContext);
String actionName = actionStructure.getName();
BoneTrack[] tracks = armatureHelper.getTracks(actionStructure, blenderContext);
// determining the animation time
float maximumTrackLength = 0;
for (BoneTrack track : tracks) {
float length = track.getLength();
if (length > maximumTrackLength) {
maximumTrackLength = length;
}
}
Animation boneAnimation = new Animation(actionName, maximumTrackLength);
boneAnimation.setTracks(tracks);
animations.add(boneAnimation);
}
}
animData = new AnimData(new Skeleton(bones), animations);
}
}
}