diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2005-01-17 16:16:35 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2005-01-17 16:16:35 +0000 |
| commit | ea28a5b5b30658771ce3da210e534d449be56805 (patch) | |
| tree | 320c5fc7dbd5e69fcfc3c56f67c85c554e107adc /src/mesa/swrast | |
| parent | 730fabd67ab86c6ab13b4b66de3f640a172e8e76 (diff) | |
use FABSF(fogCoord) to fix fog calculation problem (Soju Matsumoto)
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_fog.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mesa/swrast/s_fog.c b/src/mesa/swrast/s_fog.c index 613759d1c1..0af9cd8f28 100644 --- a/src/mesa/swrast/s_fog.c +++ b/src/mesa/swrast/s_fog.c @@ -2,7 +2,7 @@ * Mesa 3-D graphics library * Version: 6.3 * - * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -109,7 +109,7 @@ _swrast_fog_rgba_span( const GLcontext *ctx, struct sw_span *span ) GLuint i; for (i = 0; i < span->end; i++) { GLfloat f, oneMinusF; - f = (fogEnd - fogCoord / w) * fogScale; + f = (fogEnd - FABSF(fogCoord) / w) * fogScale; f = CLAMP(f, 0.0F, 1.0F); oneMinusF = 1.0F - f; rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog); @@ -130,7 +130,7 @@ _swrast_fog_rgba_span( const GLcontext *ctx, struct sw_span *span ) GLuint i; for (i = 0; i < span->end; i++) { GLfloat f, oneMinusF; - f = (GLfloat) exp(density * fogCoord / w); + f = (GLfloat) exp(density * FABSF(fogCoord) / w); f = CLAMP(f, 0.0F, 1.0F); oneMinusF = 1.0F - f; rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog); |