1     /**
2         The base class for all elements that appear in the game.
3         @author <a href="mailto:matthewcasperson@gmail.com">Matthew Casperson</a>
4         @class
5     */
6     function VisualGameObject()
7     {
8         /**
9             The image that will be displayed by this object
10            @type Image
11        */
12        this.image = null;
13
14        /**
15            Draws this element to the back buffer
16            @param dt Time in seconds since the last frame
17          @param context The context to draw to
18          @param xScroll The global scrolling value of the x axis  
19          @param yScroll The global scrolling value of the y axis  
20        */
21        this.draw = function(/**Number*/ dt, /**CanvasRenderingContext2D*/ context, /**Number*/ xScroll, /**Number*/ yScroll)
22        {
23            context.drawImage(this.image, this.x - xScroll, this.y - yScroll);
24        }
25
26        /**
27            Initialises this object
28            @param image The image to be displayed
29          @param x The position on the X axis
30            @param y The position on the Y axis
31          @param z The depth
32        */
33        this.startupVisualGameObject = function(/**Image*/ image, /**Number*/ x, /**Number*/ y, /**Number*/ z)
34        {
35            this.startupGameObject(x, y, z);
36            this.image = image;
37            return this;
38        }
39
40        /**
41            Clean this object up
42        */
43        this.shutdownVisualGameObject = function()
44        {
45            this.shutdownGameObject();
46            this.image = null;
47        }
48
49        this.collisionArea = function()
50        {
51            return new Rectangle().startupRectangle(this.x, this.y, this.image.width, this.image.height);
52        }
53    }
54    VisualGameObject.prototype = new GameObject;