import core from '../core';
/**
* The ParticleContainer class is a really fast version of the Container built solely for speed,
* so use when you need a lot of sprites or particles. The tradeoff of the ParticleContainer is that advanced
* functionality will not work. ParticleContainer implements only the basic object transform (position, scale, rotation).
* Any other functionality like tinting, masking, etc will not work on sprites in this batch.
*
* It's extremely easy to use :
*
* ```js
* let container = new ParticleContainer();
*
* for (let i = 0; i < 100; ++i)
* {
* let sprite = new PIXI.Sprite.fromImage("myImage.png");
* container.addChild(sprite);
* }
* ```
*
* And here you have a hundred sprites that will be renderer at the speed of light.
*
* @class
* @extends PIXI.Container
* @memberof PIXI.particles
* @param [maxSize=15000] {number} The maximum number of particles that can be renderer by the container.
* @param [properties] {object} The properties of children that should be uploaded to the gpu and applied.
* @param [properties.scale=false] {boolean} When true, scale be uploaded and applied.
* @param [properties.position=true] {boolean} When true, position be uploaded and applied.
* @param [properties.rotation=false] {boolean} When true, rotation be uploaded and applied.
* @param [properties.uvs=false] {boolean} When true, uvs be uploaded and applied.
* @param [properties.alpha=false] {boolean} When true, alpha be uploaded and applied.
* @param [batchSize=15000] {number} Number of particles per batch.
*/
class ParticleContainer extends core.Container
{
constructor(maxSize, properties, batchSize)
{
super();
batchSize = batchSize || 15000; //CONST.SPRITE_BATCH_SIZE; // 2000 is a nice balance between mobile / desktop
maxSize = maxSize || 15000;
// Making sure the batch size is valid
// 65535 is max vertex index in the index buffer (see ParticleRenderer)
// so max number of particles is 65536 / 4 = 16384
const maxBatchSize = 16384;
if (batchSize > maxBatchSize) {
batchSize = maxBatchSize;
}
if (batchSize > maxSize) {
batchSize = maxSize;
}
/**
* Set properties to be dynamic (true) / static (false)
*
* @member {boolean[]}
* @private
*/
this._properties = [false, true, false, false, false];
/**
* @member {number}
* @private
*/
this._maxSize = maxSize;
/**
* @member {number}
* @private
*/
this._batchSize = batchSize;
/**
* @member {WebGLBuffer}
* @private
*/
this._glBuffers = [];
/**
* @member {number}
* @private
*/
this._bufferToUpdate = 0;
/**
* @member {boolean}
*
*/
this.interactiveChildren = false;
/**
* The blend mode to be applied to the sprite. Apply a value of `PIXI.BLEND_MODES.NORMAL` to reset the blend mode.
*
* @member {number}
* @default PIXI.BLEND_MODES.NORMAL
* @see PIXI.BLEND_MODES
*/
this.blendMode = core.BLEND_MODES.NORMAL;
/**
* Used for canvas renderering. If true then the elements will be positioned at the nearest pixel. This provides a nice speed boost.
*
* @member {boolean}
* @default true;
*/
this.roundPixels = true;
this.baseTexture = null;
this.setProperties(properties);
}
/**
* Sets the private properties array to dynamic / static based on the passed properties object
*
* @param properties {object} The properties to be uploaded
*/
setProperties(properties)
{
if ( properties ) {
this._properties[0] = 'scale' in properties ? !!properties.scale : this._properties[0];
this._properties[1] = 'position' in properties ? !!properties.position : this._properties[1];
this._properties[2] = 'rotation' in properties ? !!properties.rotation : this._properties[2];
this._properties[3] = 'uvs' in properties ? !!properties.uvs : this._properties[3];
this._properties[4] = 'alpha' in properties ? !!properties.alpha : this._properties[4];
}
}
/**
* Updates the object transform for rendering
*
* @private
*/
updateTransform()
{
// TODO don't need to!
this.displayObjectUpdateTransform();
// PIXI.Container.prototype.updateTransform.call( this );
}
/**
* Renders the container using the WebGL renderer
*
* @param renderer {PIXI.WebGLRenderer} The webgl renderer
* @private
*/
renderWebGL(renderer)
{
if (!this.visible || this.worldAlpha <= 0 || !this.children.length || !this.renderable)
{
return;
}
if(!this.baseTexture)
{
this.baseTexture = this.children[0]._texture.baseTexture;
if(!this.baseTexture.hasLoaded)
{
this.baseTexture.once('update', () => this.onChildrenChange(0));
}
}
renderer.setObjectRenderer( renderer.plugins.particle );
renderer.plugins.particle.render( this );
}
/**
* Set the flag that static data should be updated to true
*
* @private
*/
onChildrenChange(smallestChildIndex)
{
const bufferIndex = Math.floor(smallestChildIndex / this._batchSize);
if (bufferIndex < this._bufferToUpdate) {
this._bufferToUpdate = bufferIndex;
}
}
/**
* Renders the object using the Canvas renderer
*
* @param renderer {PIXI.CanvasRenderer} The canvas renderer
* @private
*/
renderCanvas(renderer)
{
if (!this.visible || this.worldAlpha <= 0 || !this.children.length || !this.renderable)
{
return;
}
const context = renderer.context;
const transform = this.worldTransform;
let isRotated = true;
let positionX = 0;
let positionY = 0;
let finalWidth = 0;
let finalHeight = 0;
const compositeOperation = renderer.blendModes[this.blendMode];
if (compositeOperation !== context.globalCompositeOperation)
{
context.globalCompositeOperation = compositeOperation;
}
context.globalAlpha = this.worldAlpha;
this.displayObjectUpdateTransform();
for (let i = 0; i < this.children.length; ++i)
{
const child = this.children[i];
if (!child.visible)
{
continue;
}
const frame = child.texture.frame;
context.globalAlpha = this.worldAlpha * child.alpha;
if (child.rotation % (Math.PI * 2) === 0)
{
// this is the fastest way to optimise! - if rotation is 0 then we can avoid any kind of setTransform call
if (isRotated)
{
context.setTransform(
transform.a,
transform.b,
transform.c,
transform.d,
transform.tx * renderer.resolution,
transform.ty * renderer.resolution
);
isRotated = false;
}
positionX = ((child.anchor.x) * (-frame.width * child.scale.x) + child.position.x + 0.5);
positionY = ((child.anchor.y) * (-frame.height * child.scale.y) + child.position.y + 0.5);
finalWidth = frame.width * child.scale.x;
finalHeight = frame.height * child.scale.y;
}
else
{
if (!isRotated)
{
isRotated = true;
}
child.displayObjectUpdateTransform();
const childTransform = child.worldTransform;
if (renderer.roundPixels)
{
context.setTransform(
childTransform.a,
childTransform.b,
childTransform.c,
childTransform.d,
(childTransform.tx * renderer.resolution) | 0,
(childTransform.ty * renderer.resolution) | 0
);
}
else
{
context.setTransform(
childTransform.a,
childTransform.b,
childTransform.c,
childTransform.d,
childTransform.tx * renderer.resolution,
childTransform.ty * renderer.resolution
);
}
positionX = ((child.anchor.x) * (-frame.width) + 0.5);
positionY = ((child.anchor.y) * (-frame.height) + 0.5);
finalWidth = frame.width;
finalHeight = frame.height;
}
const resolution = child.texture.baseTexture.resolution;
context.drawImage(
child.texture.baseTexture.source,
frame.x * resolution,
frame.y * resolution,
frame.width * resolution,
frame.height * resolution,
positionX * resolution,
positionY * resolution,
finalWidth * resolution,
finalHeight * resolution
);
}
}
/**
* Destroys the container
*
*/
destroy() {
super.destroy(arguments);
if (this._buffers) {
for (let i = 0; i < this._buffers.length; ++i) {
this._buffers[i].destroy();
}
}
this._properties = null;
this._buffers = null;
}
}
export default ParticleContainer;
