//image transformations
//ethan dale
//math, programming & art CCA SP2011 

PImage img;

void setup() {

size(600,100);
img = loadImage("motorcycle.png");
}

void draw(){

  for (int i=0; i < width; i += 170) {
  image(img, i, 0);
  imageFlip(img, 200,500, "h2");
 
  }
  
  imageFlip(img, 200,500, "h2");
  imageFlip(img, 200,500, "v");
  imageFlip(img, 200,500, "v2");
  for (int i=85; i < width; i += 170) {
  image(img, i, 0);
  noLoop();
 
  }
}





//imageFlip function by nick lally
//paste function at the bottom of your sketch, and use like this: imageFlip(imageName,x,y,"mode")
//modes are "v", "v2", "h", "h2"
//"v" mirrors vertically, "v2" mirrors top half vertically
//"h" mirrors horizontally, "h2" mirrors left half horizontally
void imageFlip(PImage imageName, int xPos, int yPos, String mode){
  //"v2" flips the top half of the image across the x-axis
  if(mode == "v2"){
    imageName.loadPixels();
    for(int i = 0; i < imageName.height; i++){
      for(int j = 1; j < imageName.width; j++){
        imageName.pixels[(imageName.height - 1 - i)*(imageName.width) + j] = imageName.pixels[i*(imageName.width) + j];
      }
    }
    imageName.updatePixels();
    image(imageName,xPos,yPos);
  
  //"v" flips the entire image across the x-axis
  }else if(mode == "v"){
    imageName.loadPixels();
    int tempImage[] = new int[imageName.width*imageName.height];
    for(int i = 0; i < imageName.width*imageName.height; i++){
     tempImage[i] = imageName.pixels[i];
    }
    
    for(int i = 0; i < imageName.height; i++){
      for(int j = 1; j < imageName.width; j++){
        imageName.pixels[(imageName.height - 1 - i)*(imageName.width) + j] = tempImage[i*(imageName.width) + j];
      }
    }
    imageName.updatePixels();
    image(imageName,xPos,yPos);
    
  //"h2" flips the left half of the image across the y-axis  
  }else if(mode == "h2"){
    imageName.loadPixels();
    for(int i = 0; i < imageName.height; i++){
      for(int j = 1; j < imageName.width; j++){
        imageName.pixels[i*imageName.width + j] = imageName.pixels[(i+1)*(imageName.width) - j];
      }
    }
    imageName.updatePixels();
    image(imageName,xPos,yPos);  
  
  //"h" flips the entire image across the y-axis  
  }else if(mode == "h"){
    imageName.loadPixels();
    int tempImage[] = new int[imageName.width*imageName.height];
    for(int i = 0; i < imageName.width*imageName.height; i++){
     tempImage[i] = imageName.pixels[i];
    }
    for(int i = 0; i < imageName.height; i++){
      for(int j = 1; j < imageName.width; j++){
        imageName.pixels[(i+1)*(imageName.width) - j] = tempImage[i*imageName.width + j];
      }
    }
    imageName.updatePixels();
    image(imageName,xPos,yPos); 
  } else {
    println("No mirror direction specified!");
    println("Use v, v2, h, or h2 for the 4th argument");
  }  
}