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Contents
// Copyright (C) 2007 Dave Griffiths
// Copyright (C) 2007 Dave Griffiths
// Licence: GPLv2 (see COPYING)
// Fluxus Shader Library
// ---------------------
// Glossy Specular Reflection Shader
// A more controllable version of blinn shading,
// Useful for ceramic or fluids - from Advanced
// Renderman, thanks to Larry Gritz
#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif
uniform vec3 AmbientColour;
uniform vec3 DiffuseColour;
uniform vec3 SpecularColour;
uniform float AmbientIntensity;
uniform float DiffuseIntensity;
uniform float SpecularIntensity;
uniform float Roughness;
uniform float Sharpness;
varying vec3 N;
varying vec3 P;
varying vec3 V;
varying vec3 L;
void main() {
float w = 0.18*(1.0-Sharpness);
vec3 l = normalize(L);
vec3 n = normalize(N);
vec3 v = normalize(V);
vec3 h = normalize(l+v);
float diffuse = dot(l,n);
float specular = smoothstep(0.72-w,0.72+w,pow(max(0.0,dot(n,h)),1.0/Roughness));
gl_FragColor = vec4(AmbientColour*AmbientIntensity +
DiffuseColour*diffuse*DiffuseIntensity +
SpecularColour*specular*SpecularIntensity,1);
}
Version data entries
10 entries across 10 versions & 1 rubygems