###### (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development version.) # SDL_UnionRect Calculate the union of two rectangles. ## Syntax ```c void SDL_UnionRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result); ``` ## Function Parameters | | | | -------------- | ------------------------------------------------------------------------------------ | | **A** | an [SDL_Rect](SDL_Rect) structure representing the first rectangle | | **B** | an [SDL_Rect](SDL_Rect) structure representing the second rectangle | | **result** | an [SDL_Rect](SDL_Rect) structure filled in with the union of rectangles `A` and `B` | ## Version This function is available since SDL 2.0.0. ---- [CategoryAPI](CategoryAPI)