CVPapers - Computer Vision Resource. OpenCV 2.1 C Reference. OPENCV_cpp_ref. Html5 - Is it possible to use OpenCV or similar library in Javascript. CXCORE Reference Manual. CvPoint 2D point with integer coordinates typedef struct CvPoint { int x; /* x-coordinate, usually zero-based */ int y; /* y-coordinate, usually zero-based */ } CvPoint; /* the constructor function */ inline CvPoint cvPoint( int x, int y ); /* conversion from CvPoint2D32f */ inline CvPoint cvPointFrom32f( CvPoint2D32f point ); CvPoint2D32f 2D point with floating-point coordinates typedef struct CvPoint2D32f { float x; /* x-coordinate, usually zero-based */ float y; /* y-coordinate, usually zero-based */ } CvPoint2D32f; /* the constructor function */ inline CvPoint2D32f cvPoint2D32f( double x, double y ); /* conversion from CvPoint */ inline CvPoint2D32f cvPointTo32f( CvPoint point ); CvPoint3D32f 3D point with floating-point coordinates CvPoint2D64f 2D point with double precision floating-point coordinates CvPoint3D64f 3D point with double precision floating-point coordinates CvSize pixel-accurate size of a rectangle CvSize2D32f sub-pixel accurate size of a rectangle CvRect CvScalar CvTermCriteria CvMat.