/* Esoteric Software SPINE wrapper for pixi.js */
spine.Bone.yDown = true;
PIXI.AnimCache = {};
/**
* Supporting class to load images from spine atlases as per spine spec.
*
* @class SpineTextureLoader
* @uses EventTarget
* @constructor
* @param basePath {String} Tha base path where to look for the images to be loaded
* @param crossorigin {Boolean} Whether requests should be treated as crossorigin
*/
PIXI.SpineTextureLoader = function(basePath, crossorigin)
{
PIXI.EventTarget.call(this);
this.basePath = basePath;
this.crossorigin = crossorigin;
this.loadingCount = 0;
};
/* constructor */
PIXI.SpineTextureLoader.prototype = PIXI.SpineTextureLoader;
/**
* Starts loading a base texture as per spine specification
*
* @method load
* @param page {spine.AtlasPage} Atlas page to which texture belongs
* @param file {String} The file to load, this is just the file path relative to the base path configured in the constructor
*/
PIXI.SpineTextureLoader.prototype.load = function(page, file)
{
page.rendererObject = PIXI.BaseTexture.fromImage(this.basePath + '/' + file, this.crossorigin);
if (!page.rendererObject.hasLoaded)
{
var scope = this;
++scope.loadingCount;
page.rendererObject.addEventListener('loaded', function(){
--scope.loadingCount;
scope.dispatchEvent({
type: 'loadedBaseTexture',
content: scope
});
});
}
};
/**
* Unloads a previously loaded texture as per spine specification
*
* @method unload
* @param texture {BaseTexture} Texture object to destroy
*/
PIXI.SpineTextureLoader.prototype.unload = function(texture)
{
texture.destroy(true);
};
/**
* A class that enables the you to import and run your spine animations in pixi.
* Spine animation data needs to be loaded using the PIXI.AssetLoader or PIXI.SpineLoader before it can be used by this class
* See example 12 (http://www.goodboydigital.com/pixijs/examples/12/) to see a working example and check out the source
*
* @class Spine
* @extends DisplayObjectContainer
* @constructor
* @param url {String} The url of the spine anim file to be used
*/
PIXI.Spine = function (url) {
PIXI.DisplayObjectContainer.call(this);
this.spineData = PIXI.AnimCache[url];
if (!this.spineData) {
throw new Error('Spine data must be preloaded using PIXI.SpineLoader or PIXI.AssetLoader: ' + url);
}
this.skeleton = new spine.Skeleton(this.spineData);
this.skeleton.updateWorldTransform();
this.stateData = new spine.AnimationStateData(this.spineData);
this.state = new spine.AnimationState(this.stateData);
this.slotContainers = [];
for (var i = 0, n = this.skeleton.drawOrder.length; i < n; i++) {
var slot = this.skeleton.drawOrder[i];
var attachment = slot.attachment;
var slotContainer = new PIXI.DisplayObjectContainer();
this.slotContainers.push(slotContainer);
this.addChild(slotContainer);
if (attachment instanceof spine.RegionAttachment)
{
var spriteName = attachment.rendererObject.name;
var sprite = this.createSprite(slot, attachment);
slot.currentSprite = sprite;
slot.currentSpriteName = spriteName;
slotContainer.addChild(sprite);
}
else if (attachment instanceof spine.MeshAttachment)
{
var mesh = this.createMesh(slot, attachment);
slot.currentMesh = mesh;
slot.currentMeshName = attachment.name;
slotContainer.addChild(mesh);
}
else
{
continue;
}
}
this.autoUpdate = true;
};
PIXI.Spine.prototype = Object.create(PIXI.DisplayObjectContainer.prototype);
PIXI.Spine.prototype.constructor = PIXI.Spine;
/**
* If this flag is set to true, the spine animation will be autoupdated every time
* the object id drawn. The down side of this approach is that the delta time is
* automatically calculated and you could miss out on cool effects like slow motion,
* pause, skip ahead and the sorts. Most of these effects can be achieved even with
* autoupdate enabled but are harder to achieve.
*
* @property autoUpdate
* @type { Boolean }
* @default true
*/
Object.defineProperty(PIXI.Spine.prototype, 'autoUpdate', {
get: function()
{
return (this.updateTransform === PIXI.Spine.prototype.autoUpdateTransform);
},
set: function(value)
{
this.updateTransform = value ? PIXI.Spine.prototype.autoUpdateTransform : PIXI.DisplayObjectContainer.prototype.updateTransform;
}
});
/**
* Update the spine skeleton and its animations by delta time (dt)
*
* @method update
* @param dt {Number} Delta time. Time by which the animation should be updated
*/
PIXI.Spine.prototype.update = function(dt)
{
this.state.update(dt);
this.state.apply(this.skeleton);
this.skeleton.updateWorldTransform();
var drawOrder = this.skeleton.drawOrder;
for (var i = 0, n = drawOrder.length; i < n; i++) {
var slot = drawOrder[i];
var attachment = slot.attachment;
var slotContainer = this.slotContainers[i];
var type = attachment.type;
if (type === spine.AttachmentType.region)
{
if (attachment.rendererObject)
{
if (!slot.currentSpriteName || slot.currentSpriteName !== attachment.name)
{
var spriteName = attachment.rendererObject.name;
if (slot.currentSprite !== undefined)
{
slot.currentSprite.visible = false;
}
slot.sprites = slot.sprites || {};
if (slot.sprites[spriteName] !== undefined)
{
slot.sprites[spriteName].visible = true;
}
else
{
var sprite = this.createSprite(slot, attachment);
slotContainer.addChild(sprite);
}
slot.currentSprite = slot.sprites[spriteName];
slot.currentSpriteName = spriteName;
}
}
var bone = slot.bone;
slotContainer.position.x = bone.worldX + attachment.x * bone.m00 + attachment.y * bone.m01;
slotContainer.position.y = bone.worldY + attachment.x * bone.m10 + attachment.y * bone.m11;
slotContainer.scale.x = bone.worldScaleX;
slotContainer.scale.y = bone.worldScaleY;
slotContainer.rotation = -(slot.bone.worldRotation * spine.degRad);
slot.currentSprite.tint = PIXI.rgb2hex([slot.r,slot.g,slot.b]);
}
else if (type === spine.AttachmentType.skinnedmesh)
{
if (!slot.currentMeshName || slot.currentMeshName !== attachment.name)
{
var meshName = attachment.name;
if (slot.currentMesh !== undefined)
{
slot.currentMesh.visible = false;
}
slot.meshes = slot.meshes || {};
if (slot.meshes[meshName] !== undefined)
{
slot.meshes[meshName].visible = true;
}
else
{
var mesh = this.createMesh(slot, attachment);
slotContainer.addChild(mesh);
}
slot.currentMesh = slot.meshes[meshName];
slot.currentMeshName = meshName;
}
attachment.computeWorldVertices(slot.bone.skeleton.x, slot.bone.skeleton.y, slot, slot.currentMesh.vertices);
}
else
{
slotContainer.visible = false;
continue;
}
slotContainer.visible = true;
slotContainer.alpha = slot.a;
}
};
/**
* When autoupdate is set to yes this function is used as pixi's updateTransform function
*
* @method autoUpdateTransform
* @private
*/
PIXI.Spine.prototype.autoUpdateTransform = function () {
this.lastTime = this.lastTime || Date.now();
var timeDelta = (Date.now() - this.lastTime) * 0.001;
this.lastTime = Date.now();
this.update(timeDelta);
PIXI.DisplayObjectContainer.prototype.updateTransform.call(this);
};
/**
* Create a new sprite to be used with spine.RegionAttachment
*
* @method createSprite
* @param slot {spine.Slot} The slot to which the attachment is parented
* @param attachment {spine.RegionAttachment} The attachment that the sprite will represent
* @private
*/
PIXI.Spine.prototype.createSprite = function (slot, attachment) {
var descriptor = attachment.rendererObject;
var baseTexture = descriptor.page.rendererObject;
var spriteRect = new PIXI.Rectangle(descriptor.x,
descriptor.y,
descriptor.rotate ? descriptor.height : descriptor.width,
descriptor.rotate ? descriptor.width : descriptor.height);
var spriteTexture = new PIXI.Texture(baseTexture, spriteRect);
var sprite = new PIXI.Sprite(spriteTexture);
var baseRotation = descriptor.rotate ? Math.PI * 0.5 : 0.0;
sprite.scale.set(descriptor.width / descriptor.originalWidth, descriptor.height / descriptor.originalHeight);
sprite.rotation = baseRotation - (attachment.rotation * spine.degRad);
sprite.anchor.x = sprite.anchor.y = 0.5;
slot.sprites = slot.sprites || {};
slot.sprites[descriptor.name] = sprite;
return sprite;
};
PIXI.Spine.prototype.createMesh = function (slot, attachment) {
var descriptor = attachment.rendererObject;
var baseTexture = descriptor.page.rendererObject;
var texture = new PIXI.Texture(baseTexture);
var strip = new PIXI.Strip(texture);
strip.drawMode = PIXI.Strip.DrawModes.TRIANGLES;
strip.padding = 5;
strip.vertices = new PIXI.Float32Array(attachment.uvs.length);
strip.uvs = attachment.uvs;
strip.indices = attachment.triangles;
slot.meshes[attachment.name] = strip;
return strip;
};
