ilikecats/stk-code_catmod
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Follow more closely Crysis subsurface scatt.

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This commit is contained in:
Vincent Lejeune 2014-04-01 23:35:32 +02:00
parent f41b737913
commit 5573ee4e34
1 changed files with 11 additions and 5 deletions
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16
data/shaders/grass_pass2.frag
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@ -15,12 +15,18 @@ void main(void)
vec2 texc = gl_FragCoord.xy / screen;
float z = texture(dtex, texc).x;
vec4 xpos = 2.0 * vec4(texc, z, 1.0) - 1.0f;
xpos = invproj * xpos;
xpos /= xpos.w;
vec3 eyedir = normalize(xpos.xyz);
vec4 xpos = 2.0 * vec4(texc, z, 1.0) - 1.0f;
xpos = invproj * xpos;
xpos /= xpos.w;
vec3 eyedir = normalize(xpos.xyz);
// Inspired from http://http.developer.nvidia.com/GPUGems3/gpugems3_ch16.html
float fEdotL = max(0., dot(SunDir, eyedir));
float fPowEdotL = pow(fEdotL, 4.);
float fLdotNBack = max(0., - dot(nor, SunDir) * 0.6 + 0.4);
float scattering = mix(fPowEdotL, fLdotNBack, .5);
float scattering = max(0., - dot(nor, SunDir) * dot(SunDir, eyedir));
vec4 color = texture(Albedo, uv);
if (color.a < 0.5) discard;
vec3 LightFactor = scattering + getLightFactor(1.);