@babylonjs/core
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Getting started? Play directly with the Babylon.js API using our [playground](https://playground.babylonjs.com/). It also contains a lot of samples to learn how to use it.
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JavaScript
/** This file must only contain pure code and pure imports */
import { NodeParticleBlockConnectionPointTypes } from "../../Enums/nodeParticleBlockConnectionPointTypes.js";
import { NodeParticleBlock } from "../../nodeParticleBlock.js";
import { _ConnectAtTheEnd } from "../../../Queue/executionQueue.js";
import { RegisterClass } from "../../../../Misc/typeStore.js";
/**
* Block used to update the direction of a particle
*/
export class UpdateDirectionBlock extends NodeParticleBlock {
/**
* Create a new UpdateDirectionBlock
* @param name defines the block name
*/
constructor(name) {
super(name);
this.registerInput("particle", NodeParticleBlockConnectionPointTypes.Particle);
this.registerInput("direction", NodeParticleBlockConnectionPointTypes.Vector3);
this.registerOutput("output", NodeParticleBlockConnectionPointTypes.Particle);
}
/**
* Gets the particle component
*/
get particle() {
return this._inputs[0];
}
/**
* Gets the direction input component
*/
get direction() {
return this._inputs[1];
}
/**
* Gets the output component
*/
get output() {
return this._outputs[0];
}
/**
* Gets the current class name
* @returns the class name
*/
getClassName() {
return "UpdateDirectionBlock";
}
/**
* Builds the block
* @param state defines the current build state
*/
_build(state) {
const system = this.particle.getConnectedValue(state);
this.output._storedValue = system;
if (!this.direction.isConnected) {
return;
}
const processDirection = (particle) => {
state.particleContext = particle;
state.systemContext = system;
particle.direction.copyFrom(this.direction.getConnectedValue(state));
};
const directionProcessing = {
process: processDirection,
previousItem: null,
nextItem: null,
};
if (system._updateQueueStart) {
_ConnectAtTheEnd(directionProcessing, system._updateQueueStart);
}
else {
system._updateQueueStart = directionProcessing;
}
}
}
let _Registered = false;
/**
* Register side effects for updateDirectionBlock.
* Safe to call multiple times; only the first call has an effect.
*/
export function RegisterUpdateDirectionBlock() {
if (_Registered) {
return;
}
_Registered = true;
RegisterClass("BABYLON.UpdateDirectionBlock", UpdateDirectionBlock);
}
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