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Diffstat (limited to 'progs/glsl/twoside.c')
| -rw-r--r-- | progs/glsl/twoside.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/progs/glsl/twoside.c b/progs/glsl/twoside.c index a57484f96c..ce155d64e9 100644 --- a/progs/glsl/twoside.c +++ b/progs/glsl/twoside.c @@ -16,6 +16,9 @@ #include <GL/glut.h> #include "shaderutil.h" +#ifndef M_PI +#define M_PI 3.1415926535 +#endif static GLint WinWidth = 300, WinHeight = 300; static char *FragProgFile = NULL; |