//
// an endless picture scroller
//
// no copyright, january 2007, benn:org
//

String imgFilePath = "mehr.jpg";
int imgWidth = 200; // should match image file width
int imgHeight = 200; // should match image file height
float scrollSpeed = 0.1; // the larger the number, the faster the scrolling

float x;
float y;
PImage img;

void setup()
{
  size(200, 200); // should match image dimensions
  frameRate(50); // we want a lot of frames for smooth scrolling
  img = loadImage(imgFilePath);
}

void draw()
{
  // measure distance of mouse from sketch center and use as
  // accelerator, slow down by a factor
  x = x - (mouseX-width/2) * scrollSpeed;
  y = y - (mouseY-height/2) * scrollSpeed;
  
  // wrap movement around
  if (x < 0) { x = width; } 
  if (x > width) { x = 0; } 
  if (y < 0) { y = height; } 
  if (y > height) { y = 0; }
  
  // draw 4 copies of the image to have no gaps
  image(img, x, y);
  image(img, x, y-height);
  image(img, x-width, y);
  image(img, x-width, y-height);
}