Program: 84020
Project: 84020
Buggy source:
/** 
 * Send a PImage to four Rainbowduino Device arranged as cube The image gets resized and converted to a Rainbowduino compatible format.
 * @param addrTopLeft the address of the top left rainbowduino
 * @param addrTopRight the address of the top right rainbowduino
 * @param addrBottomLeft the address of the bottom left rainbowduino
 * @param addrBottomRight the address of the bottom right rainbowduino
 * @param data
 * @return true if send was successful
 */
public boolean sendRgbFrame(byte addrTopLeft,byte addrTopRight,byte addrBottomLeft,byte addrBottomRight,PImage data){
  PImage topLeftImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage topRightImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage bottomLeftImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage bottomRightImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  data.loadPixels();
  topLeftImg.copy(data,0,0,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  topRightImg.copy(data,data.width / 2,0,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  bottomLeftImg.copy(data,0,data.width / 2,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  bottomRightImg.copy(data,data.width / 2,data.width / 2,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  data.updatePixels();
  topLeftImg.loadPixels();
  int[] resizedImageTopLeft=RainbowduinoHelper.resizeImage(topLeftImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,topLeftImg.width,topLeftImg.height);
  topLeftImg.updatePixels();
  topRightImg.loadPixels();
  int[] resizedImageTopRight=RainbowduinoHelper.resizeImage(topRightImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,topRightImg.width,topRightImg.height);
  topRightImg.updatePixels();
  bottomLeftImg.loadPixels();
  int[] resizedImageBottomLeft=RainbowduinoHelper.resizeImage(bottomLeftImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,bottomLeftImg.width,bottomLeftImg.height);
  bottomLeftImg.updatePixels();
  bottomRightImg.loadPixels();
  int[] resizedImageBottomRight=RainbowduinoHelper.resizeImage(bottomRightImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,bottomRightImg.width,bottomRightImg.height);
  bottomRightImg.updatePixels();
  boolean btl=sendFrame(addrTopLeft,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageTopLeft));
  boolean btr=sendFrame(addrTopRight,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageTopRight));
  boolean bbl=sendFrame(addrBottomLeft,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageBottomLeft));
  boolean bbr=sendFrame(addrBottomRight,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageBottomRight));
  return btl && btr && bbl&& bbr;
}

Fixed version (ground truth):
/** 
 * Send a PImage to four Rainbowduino Device arranged as cube The image gets resized and converted to a Rainbowduino compatible format.
 * @param addrTopLeft the address of the top left rainbowduino
 * @param addrTopRight the address of the top right rainbowduino
 * @param addrBottomLeft the address of the bottom left rainbowduino
 * @param addrBottomRight the address of the bottom right rainbowduino
 * @param data
 * @return true if send was successful
 */
public boolean sendRgbFrame(byte addrTopLeft,byte addrTopRight,byte addrBottomLeft,byte addrBottomRight,PImage data){
  PImage topLeftImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage topRightImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage bottomLeftImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  PImage bottomRightImg=new PImage(data.width / 2,data.height / 2,PApplet.RGB);
  data.loadPixels();
  topLeftImg.copy(data,0,0,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  topRightImg.copy(data,data.width / 2,0,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  bottomLeftImg.copy(data,0,data.height / 2,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  bottomRightImg.copy(data,data.width / 2,data.height / 2,data.width / 2,data.height / 2,0,0,data.width / 2,data.height / 2);
  data.updatePixels();
  topLeftImg.loadPixels();
  int[] resizedImageTopLeft=RainbowduinoHelper.resizeImage(topLeftImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,topLeftImg.width,topLeftImg.height);
  topLeftImg.updatePixels();
  topRightImg.loadPixels();
  int[] resizedImageTopRight=RainbowduinoHelper.resizeImage(topRightImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,topRightImg.width,topRightImg.height);
  topRightImg.updatePixels();
  bottomLeftImg.loadPixels();
  int[] resizedImageBottomLeft=RainbowduinoHelper.resizeImage(bottomLeftImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,bottomLeftImg.width,bottomLeftImg.height);
  bottomLeftImg.updatePixels();
  bottomRightImg.loadPixels();
  int[] resizedImageBottomRight=RainbowduinoHelper.resizeImage(bottomRightImg.pixels,NR_OF_LED_HORIZONTAL,NR_OF_LED_VERTICAL,bottomRightImg.width,bottomRightImg.height);
  bottomRightImg.updatePixels();
  boolean btl=sendFrame(addrTopLeft,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageTopLeft));
  boolean btr=sendFrame(addrTopRight,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageTopRight));
  boolean bbl=sendFrame(addrBottomLeft,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageBottomLeft));
  boolean bbr=sendFrame(addrBottomRight,RainbowduinoHelper.convertRgbToRainbowduino(resizedImageBottomRight));
  return btl && btr && bbl&& bbr;
}