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