27 lines
1.2 KiB
C
27 lines
1.2 KiB
C
float shadowFactor( const Light light, float def );
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void lambert() {
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const vec3 F0 = mix(vec3(0.04), surface.material.albedo.rgb, surface.material.metallic);
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const vec3 Lo = normalize( -surface.position.world );
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const float cosLo = max(0.0, dot(surface.normal.world, Lo));
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for ( uint i = 0; i < lights.length(); ++i ) {
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const Light light = lights[i];
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if ( light.power <= LIGHT_POWER_CUTOFF ) continue;
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const vec3 Lp = light.position;
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// const vec3 Liu = light.position - surface.position.world;
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const vec3 Liu = vec3(ubo.eyes[surface.pass].view * vec4(light.position, 1)) - surface.position.eye;
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const float La = 1.0 / (PI * pow(length(Liu), 2.0));
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const float Ls = shadowFactor( light, 0.0 );
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if ( light.power * La * Ls <= LIGHT_POWER_CUTOFF ) continue;
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const vec3 Li = normalize(Liu);
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const vec3 Lr = light.color.rgb * light.power * La * Ls;
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// const float cosLi = abs(dot(surface.normal.world, Li));
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const float cosLi = max(0.0, dot(surface.normal.eye, Li));
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const vec3 diffuse = surface.material.albedo.rgb;
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const vec3 specular = vec3(0);
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surface.fragment.rgb += (diffuse + specular) * Lr * cosLi;
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surface.fragment.a += light.power * La * Ls;
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}
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} |