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add Two APIs to Node. 

1. add getNodeToParentTransform(Node* ancestor)

2. add getNodeToParentAffineTransform(Node* ancestor)
This commit is contained in:
andyque 2015-07-20 10:03:15 +08:00
parent 0ea8dca299
commit c4d8ebc780
2 changed files with 47 additions and 14 deletions
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38
cocos/2d/CCNode.cpp
View File

@ -1761,6 +1761,28 @@ AffineTransform Node::getNodeToParentAffineTransform() const
return ret;
}
Mat4 Node::getNodeToParentTransform(Node* ancestor) const
{
Mat4 t(this->getNodeToParentTransform());
for (Node *p = _parent; p != nullptr && p != ancestor ; p = p->getParent())
{
t = p->getNodeToParentTransform() * t;
}
return t;
}
AffineTransform Node::getNodeToParentAffineTransform(Node* ancestor) const
{
AffineTransform t(this->getNodeToParentAffineTransform());
for (Node *p = _parent; p != nullptr && p != ancestor; p = p->getParent())
t = AffineTransformConcat(t, p->getNodeToParentAffineTransform());
return t;
}
const Mat4& Node::getNodeToParentTransform() const
{
if (_transformDirty)
@ -1916,24 +1938,12 @@ const Mat4& Node::getParentToNodeTransform() const
AffineTransform Node::getNodeToWorldAffineTransform() const
{
AffineTransform t(this->getNodeToParentAffineTransform());
for (Node *p = _parent; p != nullptr; p = p->getParent())
t = AffineTransformConcat(t, p->getNodeToParentAffineTransform());
return t;
return this->getNodeToParentAffineTransform(nullptr);
}
Mat4 Node::getNodeToWorldTransform() const
{
Mat4 t(this->getNodeToParentTransform());
for (Node *p = _parent; p != nullptr; p = p->getParent())
{
t = p->getNodeToParentTransform() * t;
}
return t;
return this->getNodeToParentTransform(nullptr);
}
AffineTransform Node::getWorldToNodeAffineTransform() const

23
cocos/2d/CCNode.h
View File

@ -1488,6 +1488,29 @@ public:
virtual const Mat4& getNodeToParentTransform() const;
virtual AffineTransform getNodeToParentAffineTransform() const;
/**
* Returns the matrix that transform the node's (local) space coordinates into the parent's space coordinates.
* The matrix is in Pixels.
* Note: If acenstor is not a valid ancestor of the node, the API would return the same value as @see getNodeToWorldTransform
*
* @param ancestor The parent's node pointer.
* @since v3.7
* @return The transformation matrix.
*/
virtual Mat4 getNodeToParentTransform(Node* ancestor) const;
/**
* Returns the affline transform matrix that transform the node's (local) space coordinates into the parent's space coordinates.
* The matrix is in Pixels.
*
* Note: If acenstor is not a valid ancestor of the node, the API would return the same value as @see getNodeToWorldAffineTransform
*
* @param ancestor The parent's node pointer.
* @since v3.7
* @return The affline transformation matrix.
*/
virtual AffineTransform getNodeToParentAffineTransform(Node* ancestor) const;
/**
* Sets the transformation matrix manually.
*