QUARTER_PI (0.78539...)

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 QUARTER_PI is a mathematical constant with the value 0.7853982. It is one quarter the ratio of the circumference of a circle to its diameter. It is useful in combination with the trigonometric functions sin() and cos().
Related PI (3.14159...)
TWO_PI (6.28318...)
TAU (6.28318...)
HALF_PI (1.57079...)
Updated on Fri Aug 16 21:51:57 2019.
Creative Commons License