I'm learning Processing, so I am reading some example scripts as a way to learn the language etc. I've come upon this one, and for some reason I can't seem to figure out the logic behind it. Any help would be greatly appreciated.
/**
* Simple Real-Time Slit-Scan Program.
* By Golan Levin.
*
* This demonstration depends on the canvas height being equal
* to the video capture height. If you would prefer otherwise,
* consider using the image copy() function rather than the
* direct pixel-accessing approach I have used here.
*
* Created December 2006.
* Updated June 2007 by fry.
*/
import processing.video.*;
Capture video;
int videoSliceX;
int drawPositionX;
void setup() {
size(600, 240, P2D);
// Uses the default video input, see the reference if this causes an error
video = new Capture(this, 320, 240, 30);
videoSliceX = video.width / 2;
drawPositionX = width - 1;
background(0);
}
void draw() {
if (video.available()) {
video.read();
video.loadPixels();
// Copy a column of pixels from the middle of the video
