35 lines
1007 B
Plaintext
35 lines
1007 B
Plaintext
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#version 300 es
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precision highp float;
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precision highp sampler2D;
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in vec2 texCoord;
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out vec4 fragColor;
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uniform sampler2D tex;
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vec3 color_map(float v)
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{
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float logv = log(abs(v))/log(10.0);
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float f = floor(logv + 7.0);
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float i = floor(4.0*(logv + 7.0 - f));
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if(f < 0.0) return vec3(0.0);
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if(f < 1.0) return mix(vec3(1.0, 0.0, 0.0), vec3(1.0), i/4.0);
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if(f < 2.0) return mix(vec3(0.0, 1.0, 0.0), vec3(1.0), i/4.0);
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if(f < 3.0) return mix(vec3(0.0, 0.0, 1.0), vec3(1.0), i/4.0);
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if(f < 4.0) return mix(vec3(1.0, 1.0, 0.0), vec3(1.0), i/4.0);
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if(f < 5.0) return mix(vec3(1.0, 0.0, 1.0), vec3(1.0), i/4.0);
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if(f < 6.0) return mix(vec3(0.0, 1.0, 1.0), vec3(1.0), i/4.0);
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if(f < 7.0) return mix(vec3(1.0, 0.5, 0.0), vec3(1.0), i/4.0);
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if(f < 8.0) return mix(vec3(1.0, 1.0, 1.0), vec3(1.0), i/4.0);
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return vec3(1.0);
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}
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void main()
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{
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ivec2 pixelCoord = ivec2(floor(texCoord.xy * vec2(textureSize(tex, 0).xy)));
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float f = texelFetch(tex, pixelCoord, 0).x;
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fragColor = vec4(color_map(f), 1.0);
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}
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