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
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
PITWO_PIHALF_PI
Updated on February 26, 2009 08:28:43pm PST
Processing was initiated by Ben Fry and Casey Reas. It is developed by a small team of volunteers.