CCAffineTransform CCNode::parentToNodeTransform(void)
{
if ( m_bIsInverseDirty ) {
m_tInverse = CCAffineTransformInvert(this->nodeToParentTransform());
m_bIsInverseDirty = false;
}
return m_tInverse;
}
void TransformHelp::transformFromParent(Node &node, const Node &parentNode)
{
nodeToMatrix(node, helpMatrix1);
nodeToMatrix(parentNode, helpMatrix2);
helpMatrix2 = CCAffineTransformInvert(helpMatrix2);
helpMatrix1 = CCAffineTransformConcat(helpMatrix1, helpMatrix2);
matrixToNode(helpMatrix1, node);
}
void TransformHelp::transformFromParentWithoutScale(Node &node, const Node &parentNode)
{
helpParentNode.copy(&parentNode);
helpParentNode.scaleX = 1;
helpParentNode.scaleY = 1;
nodeToMatrix(node, helpMatrix1);
nodeToMatrix(helpParentNode, helpMatrix2);
helpMatrix2 = CCAffineTransformInvert(helpMatrix2);
helpMatrix1 = CCAffineTransformConcat(helpMatrix1, helpMatrix2);
matrixToNode(helpMatrix1, node);
}
CCAffineTransform CCNode::worldToNodeTransform(void)
{
return CCAffineTransformInvert(this->nodeToWorldTransform());
}
