Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.

Name | ## QUARTER_PI (0.78539...) |
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Examples | float angle = 0.0; beginShape(POLYGON); vertex(width/2, height/2); while(angle QUARTER_PI) { vertex(width/2 + cos(angle)*40, height/2 + sin(angle)*40); angle += PI/12.0; } endShape(CLOSE); |

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(). |

Usage | Web & Application |

Related | PI TWO_PI HALF_PI |