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| author | Loic Blot <loic.blot@unix-experience.fr> | 2015-01-15 23:11:56 +1000 |
|---|---|---|
| committer | Craig Robbins <kde.psych@gmail.com> | 2015-01-15 23:12:45 +1000 |
| commit | 148fffb0f23fa437c67639ff3cc69177fb71d76a (patch) | |
| tree | a121b619c9ebf6a087148a6426cfc0f2d3f9ede0 /client/shaders/water_surface_shader/opengl_fragment.glsl | |
| parent | bd0d7865909d2c7f3f2b0b1ba4900d763642af35 (diff) | |
| download | minetest-148fffb0f23fa437c67639ff3cc69177fb71d76a.tar.gz minetest-148fffb0f23fa437c67639ff3cc69177fb71d76a.tar.bz2 minetest-148fffb0f23fa437c67639ff3cc69177fb71d76a.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..7ef30cc52 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; } |