minetest/minetest
1
0
Fork 0
mirror of https://github.com/minetest/minetest.git synced 2025-07-04 00:40:24 +02:00
Code Issues Releases Wiki Activity

Optimize bumpmapping mathematics

Browse Source
This commit is contained in:
Loic Blot
2015-01-12 11:19:53 +01:00
parent c367f7301a
commit acb22b4597
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
client/shaders/water_surface_shader/opengl_fragment.glsl
View File

@ -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;
}