void AnimationSystem::MatrixPaletteGeneration()
{
// todo: can be easly run in parallel.
for( u32 i = 0; i < m_controllers.Count(); ++i )
{
AnimController& controller = m_controllers[i];
AnimHierarchy* hierarchy = controller.GetHierarchy();
Skeleton* skeleton = controller.GetSkeleton();
Matrix4x4* palette = controller.GetSkinningPalette();
// we need inverse matrix of root node's world transformation to calculate model-space palette.
Matrix4x4 parentInvMatrix = hierarchy->GetNode(0).GetWorldTransformation();
parentInvMatrix.InverseIt();
for( u16 j = 0; j < hierarchy->GetNodeCount(); ++j )
{
// creating skinning palette.
// K = (Bj_M)^-1 * Cj_M
// palette matrix is inverse bind pose in model-space multiplied by current pose in model-space.
// world-space matrix
palette[j] = hierarchy->GetNode(j).GetWorldTransformation();
// world-space -> model-space
palette[j] = parentInvMatrix * palette[j];
// skinning palette matrix ( model-space * inverse bind pose )
palette[j] *= skeleton->GetInvBindPose(j);
}
}
}
