Vojtěch Šokala
41 lines
1.2 KiB
GLSL
41 lines
1.2 KiB
GLSL
#version 150 core
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uniform mat4 uTransform;
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uniform vec4 uColor;
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uniform int uSkyLight;
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uniform int uBlockLight;
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uniform sampler2D uLightMap;
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uniform float uNorthShading;
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uniform float uSouthShading;
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uniform float uEastShading;
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uniform float uWestShading;
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uniform float uTopShading;
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uniform float uBottomShading;
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in vec3 vPosition;
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out vec4 fColor;
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void main()
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{
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gl_Position = uTransform * vec4(vPosition, 1.0);
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float blockLight = (float(uBlockLight)+0.5) / 16.0;
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float skyLight = (float(uSkyLight)+0.5) / 16.0;
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vec4 lightColor = vec4(texture(uLightMap, vec2(blockLight, skyLight)).xyz, 1.0);
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fColor = lightColor * uColor;
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// apply directional shading
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if (gl_VertexID >= 0 && gl_VertexID < 4) { fColor.rgb *= uNorthShading; }
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else if (gl_VertexID >= 4 && gl_VertexID < 8) { fColor.rgb *= uSouthShading; }
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else if (gl_VertexID >= 8 && gl_VertexID < 12) { fColor.rgb *= uWestShading; }
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else if (gl_VertexID >= 12 && gl_VertexID < 16) { fColor.rgb *= uEastShading; }
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else if (gl_VertexID >= 16 && gl_VertexID < 20) { fColor.rgb *= uBottomShading; }
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else if (gl_VertexID >= 20 && gl_VertexID < 24) { fColor.rgb *= uTopShading; }
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} |