//This file is automatically rebuilt by the Cesium build process.
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export default "/**\n\
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* Computes the luminance of a color. \n\
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*\n\
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* @name czm_luminance\n\
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* @glslFunction\n\
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*\n\
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* @param {vec3} rgb The color.\n\
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* \n\
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* @returns {float} The luminance.\n\
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*\n\
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* @example\n\
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* float light = czm_luminance(vec3(0.0)); // 0.0\n\
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* float dark = czm_luminance(vec3(1.0)); // ~1.0 \n\
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*/\n\
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float czm_luminance(vec3 rgb)\n\
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{\n\
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// Algorithm from Chapter 10 of Graphics Shaders.\n\
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const vec3 W = vec3(0.2125, 0.7154, 0.0721);\n\
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return dot(rgb, W);\n\
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}\n\
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";
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