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Documentation→Reference→Constants

Name

PI

Description

PI is a mathematical constant with the value 3.1415927. It is the ratio of the circumference of a circle to its diameter. It is useful in combination with the trigonometric functions sin() and cos().

Examples

  • size(400, 400);
float x = width/2;
float y = height/2;
float d = width * 0.8;
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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