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