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 | ## HALF_PI (1.57079...) |
---|---|

Examples | float f = 0.0; beginShape(POLYGON); while(f < HALF_PI) { vertex(width/2 + cos(f)*40, height/2 + sin(f)*40); f += PI/12.0; } endShape(); |

Description | HALF_PI is a mathematical constant with the value 1.57079632679489661923. 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(). |

Usage | Web & Application |

Related | PI TWO_PI QUARTER_PI |