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<h1 class="file-heading">File: src\gameobjects\Sprite.ts</h1>
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<pre class="code prettyprint linenums">
/**
* The GameObject namespace holds classes which are designed to be added to a State (either directly, or as an ancestor of a Group) and are the Objects that are used when wanting to render anything visual onto the current State. Each GameObject is a representation of a particular item in a game and as such has information that corresponds to that item (like where they are in the 'GameWorld', the scale of the GameObject, who their parent is, e.t.c). For Example: If you wanted to have a massive background image then you can use the StaticImage GameObject, as that is a relatively light-weight object). Or if you had Player with an Animation, which user's could interactive with, then you would use a Sprite, which is more robust.
*
* @module Kiwi
* @submodule GameObjects
* @main GameObjects
*/
module Kiwi.GameObjects {
/**
* A Sprite is a general purpose GameObject that contains majority of the functionality that is needed/would be wanted and as such should be used only when you are wanting a GameObject with a lot of interaction. When creating a Sprite you pass to it as TextureAtlas (for the image you want to render), now if that Texture Atlas isn't a SINGLE_IMAGE then the Sprite will have an AnimationManager Component to handle any SpriteSheet animations you need.
*
* @class Sprite
* @namespace Kiwi.GameObjects
* @extends Kiwi.Entity
* @constructor
* @param state {Kiwi.State} The state that this sprite belongs to
* @param atlas {Kiwi.Textures.TextureAtlas} The texture you want to apply to this entity
* @param [x=0] {Number} The sprites initial coordinates on the x axis.
* @param [y=0] {Number} The sprites initial coordinates on the y axis.
* @param [enableInput=false] {boolean} If the input component should be enabled or not.
* @return {Sprite}
*/
export class Sprite extends Kiwi.Entity {
constructor(state: Kiwi.State, atlas: Kiwi.Textures.TextureAtlas, x: number = 0, y: number = 0, enableInput: boolean = false) {
super(state, x, y);
if (Kiwi.Utils.Common.isString(atlas)) {
atlas = this.state.textures[ <any>atlas ];
}
//Texture atlas error check
if (typeof atlas == "undefined") {
Kiwi.Log.error('A Texture Atlas was not passed when instantiating a new Sprite.', '#sprite', '#texture');
this.visible = false;
this.active = false;
return;
}
if (this.game.renderOption === Kiwi.RENDERER_WEBGL) {
this.glRenderer = this.game.renderer.requestSharedRenderer("TextureAtlasRenderer");
}
this.atlas = atlas;
this.name = this.atlas.name;
this.cellIndex = this.atlas.cellIndex;
//may need to add an optional other cell frame index here
this.width = atlas.cells[this.cellIndex].w;
this.height = atlas.cells[this.cellIndex].h;
this.transform.rotPointX = this.width / 2;
this.transform.rotPointY = this.height / 2;
//Create the components needed
this.box = this.components.add(new Kiwi.Components.Box(this, x, y, this.width, this.height));
this.input = this.components.add(new Kiwi.Components.Input(this, this.box, enableInput));
//Check to see if this sprite could be animated or not
if (this.atlas.type === Kiwi.Textures.TextureAtlas.SINGLE_IMAGE) {
this.animation = null;
this._isAnimated = false;
} else {
this.animation = this.components.add(new Kiwi.Components.AnimationManager(this));
this._isAnimated = true;
}
}
/**
* Returns the type of object that this is.
* @method objType
* @return {string} "Sprite"
* @public
*/
public objType():string {
return "Sprite";
}
/**
* Indicates whether or not this sprite is animated or not.
* This sprite will not be animated if the texture used is a SINGLE_IMAGE.
* @property _isAnimated
* @type boolean
* @private
*/
private _isAnimated: boolean;
/**
* The animation component that allows you to create a animation with spritesheets/texture atlas's.
* Note: If the atlas that was added is of type Kiwi.Textures.TextureAtlas.SINGLE_IMAGE then no animation component will be created.
* @property animation
* @type Kiwi.Components.AnimationManager
* @public
*/
public animation: Kiwi.Components.AnimationManager;
/**
* The box component that controls the bounding box around this Game Object
* @property box
* @type Kiwi.Components.Box
* @public
*/
public box: Kiwi.Components.Box;
/**
* The Input component controls the user interaction with this Game Object
* @property input
* @type Kiwi.Components.Input
* @public
*/
public input: Kiwi.Components.Input;
/**
* Called by parent when its update loop gets executed.
* @method update
* @public
*/
public update() {
super.update();
if (this._isAnimated) {
this.width = this.atlas.cells[this.cellIndex].w;
this.height = this.atlas.cells[this.cellIndex].h;
}
}
/**
* Renders the GameObject using Canvas.
* @method render
* @param {Kiwi.Camera} camera
* @public
*/
public render(camera:Kiwi.Camera) {
super.render(camera);
//if it is would even be visible.
if (this.alpha > 0) {
var ctx: CanvasRenderingContext2D = this.game.stage.ctx;
ctx.save();
if (this.alpha > 0 && this.alpha <= 1) {
ctx.globalAlpha = this.alpha;
}
//get entity/view matrix
var t: Kiwi.Geom.Transform = this.transform;
var m: Kiwi.Geom.Matrix = t.getConcatenatedMatrix();
ctx.transform(m.a, m.b, m.c, m.d, m.tx, m.ty);
var cell = this.atlas.cells[this.cellIndex];
ctx.drawImage(this.atlas.image, cell.x, cell.y, cell.w, cell.h, -t.rotPointX, -t.rotPointY, cell.w, cell.h);
ctx.restore();
}
}
/**
* Renders the GameObject using WebGL.
* @method renderGL
* @param {WebGLRenderingContext} gl
* @param {Kiwi.Camera} camera
* @param {Object} params
* @public
*/
public renderGL(gl: WebGLRenderingContext, camera: Kiwi.Camera, params: any = null) {
(<Kiwi.Renderers.TextureAtlasRenderer>this.glRenderer).addToBatch(gl, this, camera);
}
}
}
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