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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | //This file is automatically rebuilt by the Cesium build process.
export default "/**\n\
* Packs a depth value into a vec4 that can be represented by unsigned bytes.\n\
*\n\
* @name czm_packDepth\n\
* @glslFunction\n\
*\n\
* @param {float} depth The floating-point depth.\n\
* @returns {vec4} The packed depth.\n\
*/\n\
vec4 czm_packDepth(float depth)\n\
{\n\
// See Aras Pranckevičius' post Encoding Floats to RGBA\n\
// http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/\n\
vec4 enc = vec4(1.0, 255.0, 65025.0, 16581375.0) * depth;\n\
enc = fract(enc);\n\
enc -= enc.yzww * vec4(1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0, 0.0);\n\
return enc;\n\
}\n\
";
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