diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2000-12-15 16:42:30 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2000-12-15 16:42:30 +0000 |
| commit | 74e2dd38ed2d4be3454683c3b3f6959738ef235a (patch) | |
| tree | fb7c6378cc3205bdcae414c65c9286cdcd4c4315 /src/mesa/swrast/s_fog.c | |
| parent | 783d7dfcbf40f727c85915b3e5ea5ff6682eaa48 (diff) | |
minor fog clean-ups (Klaus Niederkrueger)
Diffstat (limited to 'src/mesa/swrast/s_fog.c')
| -rw-r--r-- | src/mesa/swrast/s_fog.c | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/src/mesa/swrast/s_fog.c b/src/mesa/swrast/s_fog.c index 919d70e099..747edee779 100644 --- a/src/mesa/swrast/s_fog.c +++ b/src/mesa/swrast/s_fog.c @@ -1,4 +1,4 @@ -/* $Id: s_fog.c,v 1.4 2000/12/13 17:35:43 brianp Exp $ */ +/* $Id: s_fog.c,v 1.5 2000/12/15 16:42:30 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -48,17 +48,17 @@ _mesa_fog_rgba_pixels( const GLcontext *ctx, const GLfixed fog[], GLchan rgba[][4] ) { - GLfixed rFog = ctx->Fog.Color[0] * CHAN_MAXF; - GLfixed gFog = ctx->Fog.Color[1] * CHAN_MAXF; - GLfixed bFog = ctx->Fog.Color[2] * CHAN_MAXF; + GLchan rFog = FLOAT_TO_CHAN(ctx->Fog.Color[0]); + GLchan gFog = FLOAT_TO_CHAN(ctx->Fog.Color[1]); + GLchan bFog = FLOAT_TO_CHAN(ctx->Fog.Color[2]); GLuint i; - for (i=0;i<n;i++) { + for (i = 0; i < n; i++) { GLfixed f = CLAMP(fog[i], 0, FIXED_ONE); GLfixed g = FIXED_ONE - f; - rgba[i][0] = (f*rgba[i][0] + g*rFog) >> FIXED_SHIFT; - rgba[i][1] = (f*rgba[i][1] + g*gFog) >> FIXED_SHIFT; - rgba[i][2] = (f*rgba[i][2] + g*bFog) >> FIXED_SHIFT; + rgba[i][0] = (f * rgba[i][0] + g * rFog) >> FIXED_SHIFT; + rgba[i][1] = (f * rgba[i][1] + g * gFog) >> FIXED_SHIFT; + rgba[i][2] = (f * rgba[i][2] + g * bFog) >> FIXED_SHIFT; } } @@ -136,14 +136,14 @@ _mesa_win_fog_coords_from_z( const GLcontext *ctx, case GL_LINEAR: { GLfloat fogEnd = ctx->Fog.End; - GLfloat fogScale = (GLfloat) FIXED_ONE / (ctx->Fog.End - - ctx->Fog.Start); + GLfloat fogScale = 1.0F / (ctx->Fog.End - ctx->Fog.Start); if (ortho) { for (i=0;i<n;i++) { GLfloat ndcz = ((GLfloat) z[i] - tz) * szInv; GLfloat eyez = (ndcz - p14) / p10; - if (eyez < 0.0) eyez = -eyez; - fogcoord[i] = (GLint) ((fogEnd - eyez) * fogScale); + if (eyez < 0.0) + eyez = -eyez; + fogcoord[i] = FloatToFixed((fogEnd - eyez) * fogScale); } } else { @@ -151,8 +151,9 @@ _mesa_win_fog_coords_from_z( const GLcontext *ctx, for (i=0;i<n;i++) { GLfloat ndcz = ((GLfloat) z[i] - tz) * szInv; GLfloat eyez = p14 / (ndcz + p10); - if (eyez < 0.0) eyez = -eyez; - fogcoord[i] = (GLint) ((fogEnd - eyez) * fogScale); + if (eyez < 0.0) + eyez = -eyez; + fogcoord[i] = FloatToFixed((fogEnd - eyez) * fogScale); } } } @@ -162,7 +163,8 @@ _mesa_win_fog_coords_from_z( const GLcontext *ctx, for (i=0;i<n;i++) { GLfloat ndcz = ((GLfloat) z[i] - tz) * szInv; GLfloat eyez = (ndcz - p14) / p10; - if (eyez < 0.0) eyez = -eyez; + if (eyez < 0.0) + eyez = -eyez; fogcoord[i] = FloatToFixed(exp( -ctx->Fog.Density * eyez )); } } @@ -171,7 +173,8 @@ _mesa_win_fog_coords_from_z( const GLcontext *ctx, for (i=0;i<n;i++) { GLfloat ndcz = ((GLfloat) z[i] - tz) * szInv; GLfloat eyez = p14 / (ndcz + p10); - if (eyez < 0.0) eyez = -eyez; + if (eyez < 0.0) + eyez = -eyez; fogcoord[i] = FloatToFixed(exp( -ctx->Fog.Density * eyez )); } } |