# Unigine::ConcaveConvexCompare Class (CPP) **Header:** #include The structure is used to compare convex shapes volumes. It can be passed to sort functions as a comparison method. ## ConcaveConvexCompare Class ### Members --- ## int operator() ( const Convex* c0 , const Convex* c1 ) Compares the volume of two convex shapes. ### Arguments - *const Convex** **c0** - First shape. - *const Convex** **c1** - Second shape. ### Return value 1 if the first shape's volume is greater than the second shape's volume; otherwise 0.