A built-in GLSL floating-point constant for
1/2pi.Example
// GLSL declaration const float czm_oneOverTwoPi = ...; // Example float pi = 2.0 * czm_oneOverTwoPi;
1/2pi.// GLSL declaration const float czm_oneOverTwoPi = ...; // Example float pi = 2.0 * czm_oneOverTwoPi;