Name

HALF_PI
Examples 
x = width/2
y = height/2
d = width * 0.8
arc(x, y, d, d, 0, QUARTER_PI)
arc(x, y, d - 20, d - 20, 0, HALF_PI)
arc(x, y, d - 40, d - 40, 0, PI)
arc(x, y, d - 60, d - 60, 0, TWO_PI)
Description HALF_PI is a mathematical constant with the value 1.57079632679489661923. It is half the ratio of the circumference of a circle to its diameter. It is useful in combination with the trigonometric functions sin() and cos().
Syntax

    
    
    
    
    
        
Related
                    PI

                    TWO_PI

                    TAU

                    QUARTER_PI

            



                
                

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