(function() {(function() {Represents a rectangular region of an image Useful for spritesheets and animations
Luv.Graphics.Sprite = Luv.Class('Luv.Graphics.Sprite', {The constructor expects an image and the coordinates of the sprite's Bounding box.
init: function(image, left,top,width,height) {
this.image = image;
this.left = left;
this.top = top;
this.width = width;
this.height = height;
},
toString : function() {
return [
'instance of Luv.Graphics.Sprite(',
this.image, ', ',
this.left, ', ', this.top, ', ', this.width, ', ', this.height, ')'
].join("");
},
getImage : function() { return this.image; },
getWidth : function() { return this.width; },
getHeight : function() { return this.height; },
getDimensions : function() {
return { width: this.width, height: this.height };
},
getCenter : function() {
return { x: this.width / 2, y: this.height / 2 };
},
getBoundingBox : function() {
return { left: this.left, top: this.top, width: this.width, height: this.height };
},drawInCanvas makes Sprites drawable. It draws only the parts of the image that include the sprite, and nothing else.
drawInCanvas: function(graphics, x, y) {
if(!this.image.isLoaded()) {
throw new Error("Attepted to draw a prite of a non loaded image: " + this);
}
graphics.ctx.drawImage(this.image.source, this.left, this.top, this.width, this.height, x, y, this.width, this.height);
}
});
}());