void ccHObject::applyGLTransformation_recursive(ccGLMatrix* trans/*=NULL*/)
{
ccGLMatrix* _trans = NULL;
if (m_glTransEnabled)
{
if (!trans)
{
//if no transformation is provided (by father)
//we initiate it with the current one
trans = _trans = new ccGLMatrix(m_glTrans);
}
else
{
*trans *= m_glTrans;
}
}
if (trans)
{
applyGLTransformation(*trans);
notifyGeometryUpdate();
}
for (Container::iterator it = m_children.begin(); it!=m_children.end(); ++it)
(*it)->applyGLTransformation_recursive(trans);
if (_trans)
delete _trans;
if (m_glTransEnabled)
resetGLTransformation();
}
void ccHObject::applyGLTransformation_recursive(const ccGLMatrix* transInput/*=NULL*/)
{
ccGLMatrix transTemp;
const ccGLMatrix* transToApply = transInput;
if (m_glTransEnabled)
{
if (!transInput)
{
//if no transformation is provided (by father)
//we initiate it with the current one
transToApply = &m_glTrans;
}
else
{
transTemp = *transInput * m_glTrans;
transToApply = &transTemp;
}
}
if (transToApply)
{
applyGLTransformation(*transToApply);
notifyGeometryUpdate();
}
for (Container::iterator it = m_children.begin(); it!=m_children.end(); ++it)
(*it)->applyGLTransformation_recursive(transToApply);
if (m_glTransEnabled)
resetGLTransformation();
}
//==================================================applyGLTransformation_recursive======================================//
void ccHObject::applyGLTransformation_recursive(ccGLMatrix* trans/*=NULL*/)
{
ccGLMatrix* _trans = NULL;
if (m_glTransEnabled){
if (!trans) {
//if no transformation is provided (by father)
//we initiate it with the current one
trans = _trans = new ccGLMatrix(m_glTrans);
}
else{
//将trans 作用到m_glTrans
*trans *= m_glTrans;
}
}
//将trans作用到该物体，并提醒相互依赖的物体进行升级
if (trans){
applyGLTransformation(*trans);
notifyGeometryUpdate();
}
//对于每一个子物体，进行递归变换
for (Container::iterator it = m_children.begin(); it!=m_children.end(); ++it)
(*it)->applyGLTransformation_recursive(trans);
if (_trans)
delete _trans;
//变换完成后，进行禁止变换，对于递归函数非常重要
if (m_glTransEnabled)
resetGLTransformation();
}
