c++ - What's the difference between camShift and cvCamShift? -

the camshift function of opencv c++ interface don't have output parameter cvconnectedcomp* comp , cvbox2d* box=null. can these information if use c++ interface camshift ? can please tell me how ? thanks.

c++: rotatedrect camshift(inputarray probimage, rect& window, termcriteria criteria);  c: int cvcamshift(const cvarr* prob_image, cvrect window, cvtermcriteria criteria, cvconnectedcomp* comp, cvbox2d* box=null ); 

i don't think can retrieve connected component information; however, returns information need rotatedrect. according opencv documentation:

the function implements camshift object tracking algorithm [bradski98]. first, finds object center using meanshift() , adjusts window size , finds optimal rotation. function returns rotated rectangle structure includes object position, size, , orientation. next position of search window can obtained rotatedrect::boundingrect().

rotatedrect object has following structure:

class rotatedrect { public:     // constructors     rotatedrect();     rotatedrect(const point2f& _center, const size2f& _size, float _angle);     rotatedrect(const cvbox2d& box);     // returns minimal up-right rectangle contains rotated rectangle     rect boundingrect() const;     // backward conversion cvbox2d     operator cvbox2d() const;     // mass center of rectangle     point2f center;     // size     size2f size;     // rotation angle in degrees     float angle; };