void SkeletonModel::setJointStates(QVector<JointState> states) {
Model::setJointStates(states);
// Determine the default eye position for avatar scale = 1.0
int headJointIndex = _geometry->getFBXGeometry().headJointIndex;
if (0 <= headJointIndex && headJointIndex < _jointStates.size()) {
glm::vec3 leftEyePosition, rightEyePosition;
getEyeModelPositions(leftEyePosition, rightEyePosition);
glm::vec3 midEyePosition = (leftEyePosition + rightEyePosition) / 2.0f;
int rootJointIndex = _geometry->getFBXGeometry().rootJointIndex;
glm::vec3 rootModelPosition;
getJointPosition(rootJointIndex, rootModelPosition);
_defaultEyeModelPosition = midEyePosition - rootModelPosition;
_defaultEyeModelPosition.z = -_defaultEyeModelPosition.z;
// Skeleton may have already been scaled so unscale it
_defaultEyeModelPosition = _defaultEyeModelPosition / _scale;
}
// the SkeletonModel override of updateJointState() will clear the translation part
// of its root joint and we need that done before we try to build shapes hence we
// recompute all joint transforms at this time.
for (int i = 0; i < _jointStates.size(); i++) {
updateJointState(i);
}
clearShapes();
if (_enableShapes) {
buildShapes();
}
}
void SkeletonModel::initJointStates(QVector<JointState> states) {
Model::initJointStates(states);
// Determine the default eye position for avatar scale = 1.0
int headJointIndex = _geometry->getFBXGeometry().headJointIndex;
if (0 <= headJointIndex && headJointIndex < _jointStates.size()) {
glm::vec3 leftEyePosition, rightEyePosition;
getEyeModelPositions(leftEyePosition, rightEyePosition);
glm::vec3 midEyePosition = (leftEyePosition + rightEyePosition) / 2.0f;
int rootJointIndex = _geometry->getFBXGeometry().rootJointIndex;
glm::vec3 rootModelPosition;
getJointPosition(rootJointIndex, rootModelPosition);
_defaultEyeModelPosition = midEyePosition - rootModelPosition;
_defaultEyeModelPosition.z = -_defaultEyeModelPosition.z;
// Skeleton may have already been scaled so unscale it
_defaultEyeModelPosition = _defaultEyeModelPosition / _scale;
}
// the SkeletonModel override of updateJointState() will clear the translation part
// of its root joint and we need that done before we try to build shapes hence we
// recompute all joint transforms at this time.
for (int i = 0; i < _jointStates.size(); i++) {
updateJointState(i);
}
clearShapes();
if (_enableShapes) {
buildShapes();
}
Extents meshExtents = getMeshExtents();
_headClipDistance = -(meshExtents.minimum.z / _scale.z - _defaultEyeModelPosition.z);
_headClipDistance = std::max(_headClipDistance, DEFAULT_NEAR_CLIP);
_owningAvatar->rebuildSkeletonBody();
emit skeletonLoaded();
}
void SkeletonModel::stretchArm(int jointIndex, const glm::vec3& position) {
// find out where the hand is pointing
glm::quat handRotation;
getJointRotation(jointIndex, handRotation, true);
const FBXGeometry& geometry = _geometry->getFBXGeometry();
glm::vec3 forwardVector(jointIndex == geometry.rightHandJointIndex ? -1.0f : 1.0f, 0.0f, 0.0f);
glm::vec3 handVector = handRotation * forwardVector;
// align elbow with hand
const FBXJoint& joint = geometry.joints.at(jointIndex);
if (joint.parentIndex == -1) {
return;
}
glm::quat elbowRotation;
getJointRotation(joint.parentIndex, elbowRotation, true);
applyRotationDelta(joint.parentIndex, rotationBetween(elbowRotation * forwardVector, handVector), false);
// set position according to normal length
float scale = extractUniformScale(_scale);
glm::vec3 handPosition = position - _translation;
glm::vec3 elbowPosition = handPosition - handVector * joint.distanceToParent * scale;
// set shoulder orientation to point to elbow
const FBXJoint& parentJoint = geometry.joints.at(joint.parentIndex);
if (parentJoint.parentIndex == -1) {
return;
}
glm::quat shoulderRotation;
getJointRotation(parentJoint.parentIndex, shoulderRotation, true);
applyRotationDelta(parentJoint.parentIndex, rotationBetween(shoulderRotation * forwardVector,
elbowPosition - extractTranslation(_jointStates.at(parentJoint.parentIndex).transform)), false);
// update the shoulder state
updateJointState(parentJoint.parentIndex);
// adjust the elbow's local translation
setJointTranslation(joint.parentIndex, elbowPosition);
}
