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Reference for Processing version 1.0+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

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 February 26, 2009 08:28:43pm PST