/**
 * A built-in GLSL floating-point constant for <code>1/2pi</code>.
 *
 * @alias czm_oneOverTwoPi
 * @glslConstant
 *
 * @see CesiumMath.ONE_OVER_TWO_PI
 *
 * @example
 * // GLSL declaration
 * const float czm_oneOverTwoPi = ...;
 *
 * // Example
 * float pi = 2.0 * czm_oneOverTwoPi;
 */
const float czm_oneOverTwoPi = 0.15915494309189535;