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added divide by zero check

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This commit is contained in:
Brian Paul 2001-01-03 22:56:23 +00:00
parent d14fce03f0
commit 1c768645c5
1 changed files with 5 additions and 2 deletions
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7
src/mesa/tnl/t_vb_fog.c
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@ -1,4 +1,4 @@
/* $Id: t_vb_fog.c,v 1.1 2000/12/26 05:09:33 keithw Exp $ */
/* $Id: t_vb_fog.c,v 1.2 2001/01/03 22:56:23 brianp Exp $ */
/*
* Mesa 3-D graphics library
@ -68,7 +68,10 @@ static void make_win_fog_coords( GLcontext *ctx, GLvector1f *out,
switch (ctx->Fog.Mode) {
case GL_LINEAR:
d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
if (ctx->Fog.Start == ctx->Fog.End)
d = 1.0F;
else
d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride))
data[i] = (end - ABSF(*v)) * d;
break;