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| author | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-17 22:00:45 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2004-02-17 22:00:45 +0000 |
| commit | 4e41eb1061834c9ed1c0702efdb887197043dc55 (patch) | |
| tree | 52040341cd8c81fe8ec7c0370145ca175d789599 /progs/demos/arbfplight.c | |
| parent | 09da0b8e6621a831e3eeb9381430f2bed18a22ad (diff) | |
| download | external_mesa3d-4e41eb1061834c9ed1c0702efdb887197043dc55.zip external_mesa3d-4e41eb1061834c9ed1c0702efdb887197043dc55.tar.gz external_mesa3d-4e41eb1061834c9ed1c0702efdb887197043dc55.tar.bz2 | |
compute fog coord in eye space, not clip space
Diffstat (limited to 'progs/demos/arbfplight.c')
| -rw-r--r-- | progs/demos/arbfplight.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c index 369da2a..14d7d3e 100644 --- a/progs/demos/arbfplight.c +++ b/progs/demos/arbfplight.c @@ -102,6 +102,7 @@ static void Key( unsigned char key, int x, int y ) (void) y; switch (key) { case ' ': + case 'a': Anim = !Anim; if (Anim) glutIdleFunc(Idle); @@ -224,6 +225,7 @@ static void Init( void ) "!!ARBvp1.0\n" "ATTRIB pos = vertex.position; \n" "ATTRIB norm = vertex.normal; \n" + "PARAM modelview[4] = { state.matrix.modelview }; \n" "PARAM modelviewProj[4] = { state.matrix.mvp }; \n" "PARAM invModelview[4] = { state.matrix.modelview.invtrans }; \n" @@ -240,8 +242,8 @@ static void Init( void ) "DP3 result.texcoord[0].w, norm, invModelview[3]; \n" #if DO_FRAGMENT_FOG - "# compute fog coordinate\n" - "DP4 result.fogcoord, pos, modelviewProj[2]; \n" + "# compute fog coordinate = vertex eye-space Z coord (negated)\n" + "DP4 result.fogcoord, -pos, modelview[2]; \n" #endif "END\n"; ; @@ -360,7 +362,7 @@ static void Init( void ) glFogi(GL_FOG_MODE, GL_LINEAR); glFogfv(GL_FOG_COLOR, fogColor); glFogf(GL_FOG_START, 5.0); - glFogf(GL_FOG_END, 10.0); + glFogf(GL_FOG_END, 25.0); glEnable(GL_FOG); } #endif |