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| author | Loic Blot <loic.blot@unix-experience.fr> | 2015-01-16 20:53:14 +1000 |
|---|---|---|
| committer | Craig Robbins <kde.psych@gmail.com> | 2015-01-16 20:54:04 +1000 |
| commit | 46821f11566efa1da2ba74c9e95794d9e50d6812 (patch) | |
| tree | 8f6b92c6805787b64d70e008f98138089afa6905 /client/shaders/water_surface_shader/opengl_fragment.glsl | |
| parent | 5e58a954910d9a9a3368bee71ab3aa0b3baf7c3a (diff) | |
| download | minetest-46821f11566efa1da2ba74c9e95794d9e50d6812.tar.gz minetest-46821f11566efa1da2ba74c9e95794d9e50d6812.tar.bz2 minetest-46821f11566efa1da2ba74c9e95794d9e50d6812.zip | |
Optimize bumpmapping mathematics
OpenGL_vertex:
* bufferize a duplicate calcul
* Factorize vertexes
Diffstat (limited to 'client/shaders/water_surface_shader/opengl_fragment.glsl')
| -rw-r--r-- | client/shaders/water_surface_shader/opengl_fragment.glsl | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/client/shaders/water_surface_shader/opengl_fragment.glsl b/client/shaders/water_surface_shader/opengl_fragment.glsl index 2a1cbc568..6dc96eb48 100644 --- a/client/shaders/water_surface_shader/opengl_fragment.glsl +++ b/client/shaders/water_surface_shader/opengl_fragment.glsl @@ -87,7 +87,12 @@ vec4 base = texture2D(baseTexture, uv).rgba; vec3 E = normalize(eyeVec); float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); float diffuse = dot(E,bump.xyz); - color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb; + /* Mathematic optimization + * Original: color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb; + * This optimization save 2 multiplications (orig: 4 multiplications + 3 additions + * end: 2 multiplications + 3 additions) + */ + color = (0.05 + diffuse + 0.2 * specular) * base.rgb; } else { color = base.rgb; } |