diff options
Diffstat (limited to 'src/mesa/swrast/s_aatriangle.c')
| -rw-r--r-- | src/mesa/swrast/s_aatriangle.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/mesa/swrast/s_aatriangle.c b/src/mesa/swrast/s_aatriangle.c index 93f65b826cc..8235e957e33 100644 --- a/src/mesa/swrast/s_aatriangle.c +++ b/src/mesa/swrast/s_aatriangle.c @@ -1,4 +1,4 @@ -/* $Id: s_aatriangle.c,v 1.12 2001/03/29 16:50:32 brianp Exp $ */ +/* $Id: s_aatriangle.c,v 1.13 2001/04/10 15:46:51 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -92,7 +92,7 @@ do { \ static INLINE GLfloat solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4]) { - GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; + const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; return z; } @@ -107,8 +107,11 @@ solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4]) static INLINE GLfloat solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4]) { - GLfloat z = -plane[2] / (plane[3] + plane[0] * x + plane[1] * y); - return z; + const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y; + if (denom == 0.0F) + return 0.0F; + else + return -plane[2] / denom; } |