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 | ### 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

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