// Copyright (C) 2014 Jérôme Leclercq
// This file is part of the "Nazara Engine - Utility module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#include <Nazara/Utility/Joint.hpp>
#include <Nazara/Utility/Skeleton.hpp>
#include <Nazara/Utility/Debug.hpp>

NzJoint::NzJoint(NzSkeleton* skeleton) :
m_skeleton(skeleton),
m_skinningMatrixUpdated(false)
{
}

NzJoint::NzJoint(const NzJoint& joint) :
NzNode(joint),
m_inverseBindMatrix(joint.m_inverseBindMatrix),
m_name(joint.m_name),
m_skeleton(joint.m_skeleton),
m_skinningMatrixUpdated(false)
{
}

void NzJoint::EnsureSkinningMatrixUpdate() const
{
	if (!m_skinningMatrixUpdated)
		UpdateSkinningMatrix();
}

const NzMatrix4f& NzJoint::GetInverseBindMatrix() const
{
	return m_inverseBindMatrix;
}

NzString NzJoint::GetName() const
{
	return m_name;
}

NzSkeleton* NzJoint::GetSkeleton()
{
	return m_skeleton;
}

const NzSkeleton* NzJoint::GetSkeleton() const
{
	return m_skeleton;
}

const NzMatrix4f& NzJoint::GetSkinningMatrix() const
{
	if (!m_skinningMatrixUpdated)
		UpdateSkinningMatrix();

	return m_skinningMatrix;
}

void NzJoint::SetInverseBindMatrix(const NzMatrix4f& matrix)
{
	m_inverseBindMatrix = matrix;
	m_skinningMatrixUpdated = false;
}

void NzJoint::SetName(const NzString& name)
{
	m_name = name;

	m_skeleton->InvalidateJointMap();
}

void NzJoint::InvalidateNode()
{
	NzNode::InvalidateNode();

	m_skinningMatrixUpdated = false;
}

void NzJoint::UpdateSkinningMatrix() const
{
	if (!m_transformMatrixUpdated)
		UpdateTransformMatrix();

	m_skinningMatrix.Set(m_inverseBindMatrix);
	m_skinningMatrix.ConcatenateAffine(m_transformMatrix);
	m_skinningMatrixUpdated = true;
}