# SDL_ALPHA_TRANSPARENT_FLOAT A fully transparent floating point alpha value. ## Header File Defined in [<SDL3/SDL_pixels.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_pixels.h) ## Syntax ```c #define SDL_ALPHA_TRANSPARENT_FLOAT 0.0f ``` ## Version This macro is available since SDL 3.2.0. ## See Also - [SDL_ALPHA_OPAQUE_FLOAT](SDL_ALPHA_OPAQUE_FLOAT) ---- [CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryPixels](CategoryPixels)