void AnimSkeleton::buildSkeletonFromJoints(const std::vector<FBXJoint>& joints) {
_joints = joints;
// build a cache of bind poses
_absoluteBindPoses.reserve(joints.size());
_relativeBindPoses.reserve(joints.size());
// build a chache of default poses
_absoluteDefaultPoses.reserve(joints.size());
_relativeDefaultPoses.reserve(joints.size());
_relativePreRotationPoses.reserve(joints.size());
_relativePostRotationPoses.reserve(joints.size());
// iterate over FBXJoints and extract the bind pose information.
for (int i = 0; i < (int)joints.size(); i++) {
// build pre and post transforms
glm::mat4 preRotationTransform = _joints[i].preTransform * glm::mat4_cast(_joints[i].preRotation);
glm::mat4 postRotationTransform = glm::mat4_cast(_joints[i].postRotation) * _joints[i].postTransform;
_relativePreRotationPoses.push_back(AnimPose(preRotationTransform));
_relativePostRotationPoses.push_back(AnimPose(postRotationTransform));
// build relative and absolute default poses
glm::mat4 relDefaultMat = glm::translate(_joints[i].translation) * preRotationTransform * glm::mat4_cast(_joints[i].rotation) * postRotationTransform;
AnimPose relDefaultPose(relDefaultMat);
_relativeDefaultPoses.push_back(relDefaultPose);
int parentIndex = getParentIndex(i);
if (parentIndex >= 0) {
_absoluteDefaultPoses.push_back(_absoluteDefaultPoses[parentIndex] * relDefaultPose);
} else {
_absoluteDefaultPoses.push_back(relDefaultPose);
}
// build relative and absolute bind poses
if (_joints[i].bindTransformFoundInCluster) {
// Use the FBXJoint::bindTransform, which is absolute model coordinates
// i.e. not relative to it's parent.
AnimPose absoluteBindPose(_joints[i].bindTransform);
_absoluteBindPoses.push_back(absoluteBindPose);
if (parentIndex >= 0) {
AnimPose inverseParentAbsoluteBindPose = _absoluteBindPoses[parentIndex].inverse();
_relativeBindPoses.push_back(inverseParentAbsoluteBindPose * absoluteBindPose);
} else {
_relativeBindPoses.push_back(absoluteBindPose);
}
} else {
// use default transform instead
_relativeBindPoses.push_back(relDefaultPose);
if (parentIndex >= 0) {
_absoluteBindPoses.push_back(_absoluteBindPoses[parentIndex] * relDefaultPose);
} else {
_absoluteBindPoses.push_back(relDefaultPose);
}
}
}
}
void AnimSkeleton::buildSkeletonFromJoints(const std::vector<FBXJoint>& joints, const AnimPose& geometryOffset) {
_joints = joints;
// build a cache of bind poses
_absoluteBindPoses.reserve(joints.size());
_relativeBindPoses.reserve(joints.size());
// iterate over FBXJoints and extract the bind pose information.
for (size_t i = 0; i < joints.size(); i++) {
if (_joints[i].bindTransformFoundInCluster) {
// Use the FBXJoint::bindTransform, which is absolute model coordinates
// i.e. not relative to it's parent.
AnimPose absoluteBindPose(_joints[i].bindTransform);
_absoluteBindPoses.push_back(absoluteBindPose);
int parentIndex = getParentIndex(i);
if (parentIndex >= 0) {
AnimPose inverseParentAbsoluteBindPose = _absoluteBindPoses[parentIndex].inverse();
_relativeBindPoses.push_back(inverseParentAbsoluteBindPose * absoluteBindPose);
} else {
_relativeBindPoses.push_back(absoluteBindPose);
}
} else {
// use FBXJoint's local transform, instead
glm::mat4 rotTransform = glm::mat4_cast(_joints[i].preRotation * _joints[i].rotation * _joints[i].postRotation);
glm::mat4 relBindMat = glm::translate(_joints[i].translation) * _joints[i].preTransform * rotTransform * _joints[i].postTransform;
AnimPose relBindPose(relBindMat);
_relativeBindPoses.push_back(relBindPose);
int parentIndex = getParentIndex(i);
if (parentIndex >= 0) {
_absoluteBindPoses.push_back(_absoluteBindPoses[parentIndex] * relBindPose);
} else {
_absoluteBindPoses.push_back(relBindPose);
}
}
}
// now we want to normalize scale from geometryOffset to all poses.
// This will ensure our bone translations will be in meters, even if the model was authored with some other unit of mesure.
for (auto& absPose : _absoluteBindPoses) {
absPose.trans = (geometryOffset * absPose).trans;
absPose.scale = vec3(1, 1, 1);
}
// re-compute relative poses based on the modified absolute poses.
for (size_t i = 0; i < _relativeBindPoses.size(); i++) {
int parentIndex = getParentIndex(i);
if (parentIndex >= 0) {
_relativeBindPoses[i] = _absoluteBindPoses[parentIndex].inverse() * _absoluteBindPoses[i];
} else {
_relativeBindPoses[i] = _absoluteBindPoses[i];
}
}
}
void AnimSkeleton::buildSkeletonFromJoints(const std::vector<FBXJoint>& joints) {
_joints = joints;
// build a cache of bind poses
_absoluteBindPoses.reserve(joints.size());
_relativeBindPoses.reserve(joints.size());
// build a chache of default poses
_absoluteDefaultPoses.reserve(joints.size());
_relativeDefaultPoses.reserve(joints.size());
_relativePreRotationPoses.reserve(joints.size());
_relativePostRotationPoses.reserve(joints.size());
// iterate over FBXJoints and extract the bind pose information.
for (int i = 0; i < (int)joints.size(); i++) {
// build pre and post transforms
glm::mat4 preRotationTransform = _joints[i].preTransform * glm::mat4_cast(_joints[i].preRotation);
glm::mat4 postRotationTransform = glm::mat4_cast(_joints[i].postRotation) * _joints[i].postTransform;
_relativePreRotationPoses.push_back(AnimPose(preRotationTransform));
_relativePostRotationPoses.push_back(AnimPose(postRotationTransform));
// build relative and absolute default poses
glm::mat4 relDefaultMat = glm::translate(_joints[i].translation) * preRotationTransform * glm::mat4_cast(_joints[i].rotation) * postRotationTransform;
AnimPose relDefaultPose(relDefaultMat);
_relativeDefaultPoses.push_back(relDefaultPose);
int parentIndex = getParentIndex(i);
if (parentIndex >= 0) {
_absoluteDefaultPoses.push_back(_absoluteDefaultPoses[parentIndex] * relDefaultPose);
} else {
_absoluteDefaultPoses.push_back(relDefaultPose);
}
// build relative and absolute bind poses
if (_joints[i].bindTransformFoundInCluster) {
// Use the FBXJoint::bindTransform, which is absolute model coordinates
// i.e. not relative to it's parent.
AnimPose absoluteBindPose(_joints[i].bindTransform);
_absoluteBindPoses.push_back(absoluteBindPose);
if (parentIndex >= 0) {
AnimPose inverseParentAbsoluteBindPose = _absoluteBindPoses[parentIndex].inverse();
_relativeBindPoses.push_back(inverseParentAbsoluteBindPose * absoluteBindPose);
} else {
_relativeBindPoses.push_back(absoluteBindPose);
}
} else {
// use default transform instead
_relativeBindPoses.push_back(relDefaultPose);
if (parentIndex >= 0) {
_absoluteBindPoses.push_back(_absoluteBindPoses[parentIndex] * relDefaultPose);
} else {
_absoluteBindPoses.push_back(relDefaultPose);
}
}
}
// build mirror map.
_nonMirroredIndices.clear();
_mirrorMap.reserve(_joints.size());
for (int i = 0; i < (int)joints.size(); i++) {
if (_joints[i].name.endsWith("tEye")) {
// HACK: we don't want to mirror some joints so we remember their indices
// so we can restore them after a future mirror operation
_nonMirroredIndices.push_back(i);
}
int mirrorJointIndex = -1;
if (_joints[i].name.startsWith("Left")) {
QString mirrorJointName = QString(_joints[i].name).replace(0, 4, "Right");
mirrorJointIndex = nameToJointIndex(mirrorJointName);
} else if (_joints[i].name.startsWith("Right")) {
QString mirrorJointName = QString(_joints[i].name).replace(0, 5, "Left");
mirrorJointIndex = nameToJointIndex(mirrorJointName);
}
if (mirrorJointIndex >= 0) {
_mirrorMap.push_back(mirrorJointIndex);
} else {
_mirrorMap.push_back(i);
}
}
}
