@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.
111 lines • 3.62 kB
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 { FlowMap } from "../../../flowMap.js";
import { RegisterClass } from "../../../../Misc/typeStore.js";
/**
* Block used to update particle position based on a flow map
*/
export class UpdateFlowMapBlock extends NodeParticleBlock {
/**
* Create a new UpdateFlowMapBlock
* @param name defines the block name
*/
constructor(name) {
super(name);
this.registerInput("particle", NodeParticleBlockConnectionPointTypes.Particle);
this.registerInput("flowMap", NodeParticleBlockConnectionPointTypes.Texture);
this.registerInput("strength", NodeParticleBlockConnectionPointTypes.Float, true, 1);
this.registerOutput("output", NodeParticleBlockConnectionPointTypes.Particle);
}
/**
* Gets the particle component
*/
get particle() {
return this._inputs[0];
}
/**
* Gets the flowMap input component
*/
get flowMap() {
return this._inputs[1];
}
/**
* Gets the strength input component
*/
get strength() {
return this._inputs[2];
}
/**
* Gets the output component
*/
get output() {
return this._outputs[0];
}
/**
* Gets the current class name
* @returns the class name
*/
getClassName() {
return "UpdateFlowMapBlock";
}
/**
* Builds the block
* @param state defines the current build state
*/
_build(state) {
const system = this.particle.getConnectedValue(state);
const scene = state.scene;
const flowMapTexture = this.flowMap.connectedPoint?.ownerBlock;
let flowMap = null;
if (flowMapTexture) {
state.registerBuildPromise((async () => {
let textureContent;
try {
textureContent = await flowMapTexture.extractTextureContentAsync();
}
catch {
return;
}
if (!textureContent) {
return;
}
flowMap = new FlowMap(textureContent.width, textureContent.height, textureContent.data);
})());
}
const processFlowMap = (particle) => {
if (!flowMap) {
return;
}
const matrix = scene.getTransformMatrix();
const strength = this.strength.getConnectedValue(state);
flowMap._processParticle(particle, strength * system._tempScaledUpdateSpeed, matrix);
};
const flowMapProcessing = {
process: processFlowMap,
previousItem: null,
nextItem: null,
};
if (system._updateQueueStart) {
_ConnectAtTheEnd(flowMapProcessing, system._updateQueueStart);
}
else {
system._updateQueueStart = flowMapProcessing;
}
this.output._storedValue = system;
}
}
let _Registered = false;
/**
* Register side effects for updateFlowMapBlock.
* Safe to call multiple times; only the first call has an effect.
*/
export function RegisterUpdateFlowMapBlock() {
if (_Registered) {
return;
}
_Registered = true;
RegisterClass("BABYLON.UpdateFlowMapBlock", UpdateFlowMapBlock);
}
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