Rendering stuff

gistfile1.txt

function GameDisplay(ctx, renderer)
{
  this.objects = new Array();
  this.renderer = renderer;
	
  this.addObject = function(object)
  {
    objects.push(Object);
  }
	
  this.updateDisplay= function()
  {
    for(var i in objects)
    {
      this.renderer.draw(objects[i]);
    }
  }
}

function RendererRegistry()
{
  this.renderers = {};
  
  this.registerObjectRenderer = function(objectType, renderer){
    this.renderers[objectType] = renderer;
  };
  
  this.draw = function(object){
    if(!this.renderers[typeof(object)]){
      throw new Error('no renderer registered for type'+typeof(object));
    }
    
    this.renderers[typeof(object)].draw(object);
  };
}