export_video.pde

/**
 *  Simple animation to illustrate Processing.org HD video export using FFmpeg
 *  See this post for complete details
 *  http://owenmundy.com/blog/2013/01/use-processing-and-ffmpeg-to-export-hd-video/
 *  2013 Owen Mundy owenmundy.com
 */

float xtheta = 0.0;
float ytheta = 0.0;
int r = 170;
int g = 101;
int b = 220;
int rn = 1;
int gn = 2;
int bn = -1;
int i = 0;

void setup() {
  size(1920,1080, OPENGL);
}
void draw() {
  lights();
  background(255);
  noStroke();
  if(r <= 160 || r >= 255 ) { rn*=-1; }
  if(g <= 160 || g >= 255 ) { gn*=-1; }
  if(b <= 160 || b >= 255 ) { bn*=-1; }
  r += rn;
  g += gn;
  b += bn;
  fill(r, g, b);
  translate (width/2, height/2);
  rotateX(xtheta);
  rotateY(ytheta);
  rectMode(CENTER);
  rect(0, 0, width/2, height/2);
  xtheta += .01;
  ytheta += .02;
  saveFile(i++); 
}
// export filenames w/leading zeros
void saveFile(int i) {
  String istr = i+"";
  if (i < 10) { istr = "00000" + i; }
  else if (i < 100) { istr = "0000" + i; }
  else if (i < 1000) { istr = "000" + i; }
  else if (i < 10000) { istr = "00" + i; }
  else if (i < 100000) { istr = "0" + i; }
  save("p_"+ istr +".jpg");
}