/usr/share/gem/examples/data/Toon.frag is in gem-doc 1:0.93.3-13.
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// Fragment shader for cartoon-style shading
//
// Author: Philip Rideout
//
// Copyright (c) 2005 3Dlabs Inc. Ltd.
//
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* Copyright (C) 2002-2006 3Dlabs Inc. Ltd. *
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* All rights reserved. *
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const vec3 DiffuseColor= vec3( 0.1,0.1,0.1);
const vec3 PhongColor = vec3( 0.5,0.5,0.5);
const float Edge= 0.2;
uniform float Phong;
varying vec3 Normal;
void main (void)
{
vec3 color = DiffuseColor;
float f = dot(vec3(0,0,1),Normal);
if (abs(f) < Edge)
color = vec3(0);
if (f > Phong)
color = PhongColor;
gl_FragColor = vec4(color, 1);
}
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