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Cycles: Add a "Normal" input socket to the Layer Weight node + GLSL drawing code.

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Patch by lichtwerk (Philipp Oeser).

Differential Revision: http://developer.blender.org/D28
This commit is contained in:
Thomas Dinges
2013-11-22 00:33:28 +01:00
parent a08750addf
commit bd5da19d86
4 changed files with 37 additions and 9 deletions
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18
source/blender/gpu/shaders/gpu_shader_material.glsl
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@@ -2159,6 +2159,24 @@ void node_fresnel(float ior, vec3 N, vec3 I, out float result)
result = fresnel_dielectric(normalize(I), N, (gl_FrontFacing)? eta: 1.0/eta);
}
/* layer_weight */
void node_layer_weight(float blend, vec3 N, vec3 I, out float fresnel, out float facing)
{
/* fresnel */
float eta = max(1.0 - blend, 0.00001);
fresnel = fresnel_dielectric(normalize(I), N, (gl_FrontFacing)? 1.0/eta : eta );
/* facing */
facing = abs(dot(normalize(I), N));
if(blend != 0.5) {
blend = clamp(blend, 0.0, 0.99999);
blend = (blend < 0.5)? 2.0*blend: 0.5/(1.0 - blend);
facing = pow(facing, blend);
}
facing = 1.0 - facing;
}
/* gamma */
void node_gamma(vec4 col, float gamma, out vec4 outcol)