# SDL_GetRectUnion Calculate the union of two rectangles. ## Header File Defined in [<SDL3/SDL_rect.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_rect.h) ## Syntax ```c bool SDL_GetRectUnion(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *result); ``` ## Function Parameters | | | | | ---------------------------- | ---------- | ------------------------------------------------------------------------------------- | | const [SDL_Rect](SDL_Rect) * | **A** | an [SDL_Rect](SDL_Rect) structure representing the first rectangle. | | const [SDL_Rect](SDL_Rect) * | **B** | an [SDL_Rect](SDL_Rect) structure representing the second rectangle. | | [SDL_Rect](SDL_Rect) * | **result** | an [SDL_Rect](SDL_Rect) structure filled in with the union of rectangles `A` and `B`. | ## Return Value (bool) Returns true on success or false on failure; call [SDL_GetError](SDL_GetError)() for more information. ## Version This function is available since SDL 3.2.0. ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryRect](CategoryRect)