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Name

QUARTER_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().

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);
    Image output for example 1

Related

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