diff options
Diffstat (limited to 'progs/demos/engine.c')
| -rw-r--r-- | progs/demos/engine.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/progs/demos/engine.c b/progs/demos/engine.c index 393cd95988..6040a2f103 100644 --- a/progs/demos/engine.c +++ b/progs/demos/engine.c @@ -16,6 +16,10 @@ #include "trackball.h" +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + #define DEG_TO_RAD(DEG) ((DEG) * M_PI / 180.0) #define TEXTURE_FILE "../images/reflect.rgb" |