rotation - Check if point is inside a rotated rectangle (with different rectangle origins) -

how can check if point inside rotaded rectangle when rectangle can have different origins? i'm using now:

struct point  {     float x;     float y; };  struct rectangle {     float x;     float y;     float w;     float h;     float origin;     float rotation; // in degrees };  bool contains(const rectangle& rect, const point& point) {     float c = std::cos(toradians(-rect.rotation));     float s = std::sin(toradians(-rect.rotation));      float x  = rect.x;     float y  = rect.y;     float w  = rect.w;     float h  = rect.h;      float rotx = x + c * (point.x - x) - s * (point.y - y);     float roty = y + s * (point.x - x) + c * (point.y - y);      float lx = x - w / 2.f;     float rx = x + w / 2.f;     float ty = y - h / 2.f;     float = y + h / 2.f;      return lx <= rotx && rotx <= rx && ty <= roty && roty <= by; } 

code work when origin @ center of rectangle not in other origins (that have tested). how can make works when origin example @ top-left corner of rectangle?