FGFS-4.1/OpenSceneGraph
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Added AlphaFunc support into osgVolume::AlphaFuncProperty.

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This commit is contained in:
Robert Osfield
2009-01-20 12:39:26 +00:00
parent 8a971d96d2
commit 87cd4530f5
11 changed files with 51 additions and 19 deletions
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6
src/osgVolume/Shaders/volume_tf_frag.cpp
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@@ -2,7 +2,7 @@ char volume_tf_frag[] = "uniform sampler3D baseTexture;\n"
"uniform sampler1D tfTexture;\n"
"uniform float sampleDensity;\n"
"uniform float transparency;\n"
"uniform float alphaCutOff;\n"
"uniform float AlphaFuncValue;\n"
"\n"
"varying vec4 cameraPos;\n"
"varying vec4 vertexPos;\n"
@@ -77,7 +77,7 @@ char volume_tf_frag[] = "uniform sampler3D baseTexture;\n"
" vec4 color = texture1D( tfTexture, v);\n"
"\n"
" float r = color[3]*transparency;\n"
" if (r>alphaCutOff)\n"
" if (r>AlphaFuncValue)\n"
" {\n"
" fragColor.xyz = fragColor.xyz*(1.0-r)+color.xyz*r;\n"
" fragColor.w += r;\n"
@@ -95,7 +95,7 @@ char volume_tf_frag[] = "uniform sampler3D baseTexture;\n"
" fragColor.w *= transparency;\n"
"\n"
" if (fragColor.w>1.0) fragColor.w = 1.0; \n"
" if (fragColor.w<alphaCutOff) discard;\n"
" if (fragColor.w<AlphaFuncValue) discard;\n"
" \n"
" gl_FragColor = fragColor;\n"
"}\n"