Reference+
Name
HALF_PI
Description
HALF_PI is a mathematical constant with the value 1.5707964. 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().
Examples
float x = width/2; float y = height/2; float d = width * 0.8; size(400,400); arc(x, y, d, d, 0, QUARTER_PI); arc(x, y, d-80, d-80, 0, HALF_PI); arc(x, y, d-160, d-160, 0, PI); arc(x, y, d-240, d-240, 0, TWO_PI);
Related
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