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- //This file is automatically rebuilt by the Cesium build process.
- export default "/**\n\
- * Adjusts the saturation of a color.\n\
- * \n\
- * @name czm_saturation\n\
- * @glslFunction\n\
- * \n\
- * @param {vec3} rgb The color.\n\
- * @param {float} adjustment The amount to adjust the saturation of the color.\n\
- *\n\
- * @returns {float} The color with the saturation adjusted.\n\
- *\n\
- * @example\n\
- * vec3 greyScale = czm_saturation(color, 0.0);\n\
- * vec3 doubleSaturation = czm_saturation(color, 2.0);\n\
- */\n\
- vec3 czm_saturation(vec3 rgb, float adjustment)\n\
- {\n\
- // Algorithm from Chapter 16 of OpenGL Shading Language\n\
- const vec3 W = vec3(0.2125, 0.7154, 0.0721);\n\
- vec3 intensity = vec3(dot(rgb, W));\n\
- return mix(intensity, rgb, adjustment);\n\
- }\n\
- ";
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