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@luma.gl/shadertools

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Shader module system for luma.gl

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const fs = "uniform float strength;\n\nvec4 ink_sampleColor(sampler2D texture, vec2 texSize, vec2 texCoord) {\n vec2 dx = vec2(1.0 / texSize.x, 0.0);\n vec2 dy = vec2(0.0, 1.0 / texSize.y);\n vec4 color = texture2D(texture, texCoord);\n float bigTotal = 0.0;\n float smallTotal = 0.0;\n vec3 bigAverage = vec3(0.0);\n vec3 smallAverage = vec3(0.0);\n for (float x = -2.0; x <= 2.0; x += 1.0) {\n for (float y = -2.0; y <= 2.0; y += 1.0) {\n vec3 sample = texture2D(texture, texCoord + dx * x + dy * y).rgb;\n bigAverage += sample;\n bigTotal += 1.0;\n if (abs(x) + abs(y) < 2.0) {\n smallAverage += sample;\n smallTotal += 1.0;\n }\n }\n }\n vec3 edge = max(vec3(0.0), bigAverage / bigTotal - smallAverage / smallTotal);\n float power = strength * strength * strength * strength * strength;\n return vec4(color.rgb - dot(edge, edge) * power * 100000.0, color.a);\n}\n"; const uniforms = { strength: { value: 0.25, min: 0, softMax: 1 } }; export const ink = { name: 'ink', uniforms, fs, passes: [{ sampler: true }] }; //# sourceMappingURL=ink.js.map