varying vec3 N; varying vec3 L; varying vec3 V; varying vec2 T; varying vec3 P; uniform sampler2D NormalMap; void main() { vec3 bump = normalize(texture2D(NormalMap,T).xyz*2.0-1.0)-vec3(0,0,1); vec3 n = normalize(N); vec3 bn = normalize(N+bump*2.0); vec3 l = normalize(L); vec3 v = normalize(V); float HighlightSize=0.1; float ShadowSize=0.2; float OutlineWidth=0.2; vec4 MidColour=mix(vec4(0.171,0.273,0.336,1), gl_FrontMaterial.diffuse, smoothstep(-2.0,2.0,P.y)); vec4 HighlightColour=MidColour*1.3; vec4 ShadowColour=MidColour*0.6; MidColour.a=1.0; HighlightColour.a=1.0; ShadowColour.a=1.0; float lambert = dot(l,bn); vec4 colour = MidColour; if (lambert > 1.0-HighlightSize) colour = HighlightColour; if (lambert < ShadowSize) colour = ShadowColour; if (dot(n,v) < OutlineWidth) colour = vec4(0,0,0,1); // add linear fog //float fog_factor = clamp((gl_Fog.end - gl_FogFragCoord) * gl_Fog.scale, 0.0, 1.0); //gl_FragColor = mix(gl_Fog.color, colour, fog_factor); gl_FragColor = vec4(colour.rgb,1); }