# SDL_RectEmptyFloat

Determine whether a floating point rectangle takes no space.

## Header File

Defined in [<SDL3/SDL_rect.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_rect.h)

## Syntax

```c
SDL_FORCE_INLINE bool SDL_RectEmptyFloat(const SDL_FRect *r);
```

## Function Parameters

|                                |       |                        |
| ------------------------------ | ----- | ---------------------- |
| const [SDL_FRect](SDL_FRect) * | **r** | the rectangle to test. |

## Return Value

(bool) Returns true if the rectangle is "empty", false otherwise.

## Remarks

A rectangle is considered "empty" for this function if `r` is NULL, or if
`r`'s width and/or height are < 0.0f.

Note that this is a forced-inline function in a header, and not a public
API function available in the SDL library (which is to say, the code is
embedded in the calling program and the linker and dynamic loader will not
be able to find this function inside SDL itself).

## Thread Safety

It is safe to call this function from any thread.

## Version

This function is available since SDL 3.2.0.

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

