Influenced by a previous experiment done in ActionScript, I tried to avoid the mootools fx animation,library and created a 2D camera to pan the length of a horizontal rectangle.

Create 10 identical clips and arrange them one after the other horizontally.  Create a camera object and compute its position through the slider. Ultimately this is created to understand the movement of 2D cameras along the X axis.

The following equation moves each element's X position to synch with the camera's x value, this creates the illusion of a traveling camera. The variable "dir" is the direction, you can either go left or right. Interact with slider to see it in action.

	// Find next position according to Camera
	x = dir*(oCamera.dx - el.x);
	// Position
	el.setStyle('left',x);