//This file is automatically rebuilt by the Cesium build process.
|
export default "/**\n\
|
* Approximately computes spherical coordinates given a normal.\n\
|
* Uses approximate inverse trigonometry for speed and consistency,\n\
|
* since inverse trigonometry can differ from vendor-to-vendor and when compared with the CPU.\n\
|
*\n\
|
* @name czm_approximateSphericalCoordinates\n\
|
* @glslFunction\n\
|
*\n\
|
* @param {vec3} normal arbitrary-length normal.\n\
|
*\n\
|
* @returns {vec2} Approximate latitude and longitude spherical coordinates.\n\
|
*/\n\
|
vec2 czm_approximateSphericalCoordinates(vec3 normal) {\n\
|
// Project into plane with vertical for latitude\n\
|
float latitudeApproximation = czm_fastApproximateAtan(sqrt(normal.x * normal.x + normal.y * normal.y), normal.z);\n\
|
float longitudeApproximation = czm_fastApproximateAtan(normal.x, normal.y);\n\
|
return vec2(latitudeApproximation, longitudeApproximation);\n\
|
}\n\
|
";
|
