###### (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.

## Header File

Defined in [SDL_rect.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_rect.h)

## Syntax

```c
void SDL_UnionRect(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`. |

## Version

This function is available since SDL 2.0.0.

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[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryRect](CategoryRect)