Reference for Processing version 1.5. 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...)
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

Updated on August 30, 2010 04:29:39pm EDT