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"\n"
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"\n"
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"void main(void)\n"
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"void main(void)\n"
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"{\n"
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"{\n"
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"	// calculate the reflection\n"
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"	// calculate the reflection\n"
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"	vec3 r = normalize(2.0*dot(-v, n)*n + v);\n"
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"	vec3 r = normalize(2.0*dot(-v, n)*n + v);\n"
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"	vec3 viewer_lightdir = vec3(0, 0, 1.0);\n"
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"   float diff  = dot(n,viewer_lightdir);\n"
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"	\n"
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"	\n"
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"	vec2 r2 = normalize(vec2(r[0], r[2]));\n"
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"	vec2 r2 = normalize(vec2(r[0], r[2]));\n"
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"	vec2 x = vec2(1, 0);\n"
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"	vec2 x = vec2(1, 0);\n"
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"	float angle = acos(dot(r2, x));\n"
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"	float angle = acos(dot(r2, x));\n"
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"	\n"
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"	\n"
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"	// decide if we hit a white or black ring, based on y value\n"
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"	// decide if we hit a white or black ring, based on y value\n"
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"	gl_FragColor = smoothstep(-0.8,0.8,cos(angle*50.0)) * vec4(1.0,1.0,1.0,0.0);\n"
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"	gl_FragColor = diff * vec4(0.5,0.5,0.4,0.0) + smoothstep(0.8, 1.0,cos(13.0*angle)) * vec4(0.5,0.5,0.6,0.0);\n"
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"}\n";
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"}\n";
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const string IsophoteLineRenderer::vss =
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const string IsophoteLineRenderer::vss =
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"varying vec3 n;\n"
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"varying vec3 n;\n"
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"varying vec3 v;\n"
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"varying vec3 v;\n"
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"varying vec3 n;\n"
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"varying vec3 n;\n"
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"varying vec3 v;\n"
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"varying vec3 v;\n"
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"\n"
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"\n"
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"void main(void)\n"
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"void main(void)\n"
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"{\n"
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"{\n"
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"	vec3 l = vec3(0, 1,0);\n"
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"	vec3 viewer_lightdir = vec3(0, 0, 1.0);\n"
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"	vec3 isophote_lightdir = viewer_lightdir;\n"
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"	float angle = acos(dot(n, l));\n"
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"	float angle = acos(dot(n, isophote_lightdir));\n"
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"   float diff  = dot(n,viewer_lightdir);\n"
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"	\n"
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"	\n"
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"	// decide if we hit a white or black ring, based on y value\n"
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"	// decide if we hit a white or black ring, based on y value\n"
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"	gl_FragColor = smoothstep(-0.8, 0.8,cos(angle*80.0)) * vec4(1.0,1.0,1.0,0.0);\n"
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"	gl_FragColor = diff * vec4(0.5,0.5,0.4,0.0) + smoothstep(0.8, 1.0,cos(20.0*angle)) * vec4(0.5,0.5,0.6,0.0);\n"
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"}\n";
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"}\n";
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const string MetallicRenderer::vss =
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const string MetallicRenderer::vss =
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"varying vec3 n;\n"
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"varying vec3 n;\n"
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"varying vec3 v;\n"
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"varying vec3 v;\n"
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"	vec3 e = l;\n"
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"	vec3 e = l;\n"
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"	vec3 r = normalize(2.0*dot(l, n)*n - l);\n"
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"	vec3 r = normalize(2.0*dot(l, n)*n - l);\n"
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"	\n"
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"	\n"
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"	vec4 a = vec4(0.0,0.1,.3,1.0);\n"
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"	vec4 a = vec4(0.0,0.1,.3,1.0);\n"
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"	vec4 d = vec4(0.7,0.7,0.0,1.0) * abs(dot(l, n));\n"
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"	vec4 d = vec4(0.7,0.7,0.0,1.0) * abs(dot(l, n));\n"
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"	float sr = 0.2*smoothstep(0.3,0.95,dot(r, e));\n"
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"	float sr = 0.2*smoothstep(0.2,0.95,dot(r, e));\n"
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"	float sg = 0.1*smoothstep(0.4,0.95,dot(r, e));\n"
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"	float sg = 0.09*smoothstep(0.4,0.95,dot(r, e));\n"
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"	float sb = 0.3*smoothstep(0.9,0.95,dot(r, e));\n"
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"	float sb = 0.07*smoothstep(0.9,0.95,dot(r, e));\n"
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"	\n"
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"	\n"
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"	gl_FragColor =  a + d + vec4(sr,sg,sb,1.0);\n"
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"	gl_FragColor =  a + d + vec4(sr,sg,sb,1.0);\n"
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"}\n";
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"}\n";
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const string GlazedRenderer::vss =
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"varying vec3 n;\n"
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"varying vec3 v;\n"
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"\n"
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"void main(void)\n"
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"{\n"
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"	gl_Position = ftransform();\n"
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"	v = vec3(gl_ModelViewMatrix * gl_Vertex);\n"
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"	n = normalize(gl_NormalMatrix * gl_Normal);\n"
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"}\n"
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"\n";
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const string GlazedRenderer::fss =
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"varying vec3 n;\n"
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"varying vec3 v;\n"
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"\n"
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"vec4 glazed_shader(vec4 mat_col,  vec4 light_col, vec3 light_dir)\n"
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"{\n"
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"	vec3 e = normalize(-v);\n"
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"	vec3 r = normalize(2.0*dot(e, n)*n - e);\n"
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"	float d = max(0.05,dot(light_dir, n));\n"
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"	vec4 diff = mat_col * light_col *d; 	\n"
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"	vec4 refl = smoothstep(0.7,0.75,dot(r,light_dir)) * light_col;\n"
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"	return 0.15*refl + diff;\n"
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"}\n"
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"\n"
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"void main(void)\n"
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"{\n"
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"	vec4 mat_col = vec4(0.9,1.0,0.4,1.0);\n"
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"	\n"
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"	vec3 light0_dir = vec3(0.0,1.0,0.0);\n"
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"	vec4 light0_col = vec4(0.7,0.9,1.0,1.0);\n"
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"	\n"
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"	vec3 light1_dir = vec3(0.0,0.0,1.0);\n"
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"	vec4 light1_col = vec4(1.0,1.0,0.7,1.0);\n"
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"	\n"
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"	gl_FragColor = \n"
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"	0.5*glazed_shader(mat_col, light0_col, light0_dir)+\n"
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"	0.5*glazed_shader(mat_col, light1_col, light1_dir);\n"
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"	\n"
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"	gl_FragColor.a = 1.0;\n"
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"}\n";
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