Bone3D* MeshSkin::getRootBone() const
{
Bone3D* root = nullptr;
if (_skinBones.size())
{
root = _skinBones.at(0);
while (root->getParentBone()) {
root = root->getParentBone();
}
}
return root;
}
void Mesh::calculateAABB()
{
if (_meshIndexData)
{
_aabb = _meshIndexData->getAABB();
if (_skin)
{
//get skin root
Bone3D* root = nullptr;
Mat4 invBindPose;
if (_skin->_skinBones.size())
{
root = _skin->_skinBones.at(0);
while (root) {
auto parent = root->getParentBone();
bool parentInSkinBone = false;
for (const auto& bone : _skin->_skinBones) {
if (bone == parent)
{
parentInSkinBone = true;
break;
}
}
if (!parentInSkinBone)
break;
root = parent;
}
}
if (root)
{
_aabb.transform(root->getWorldMat() * _skin->getInvBindPose(root));
}
}
}
}