@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 { NodeMaterialBlock } from "../nodeMaterialBlock.js";
import { NodeMaterialBlockConnectionPointTypes } from "../Enums/nodeMaterialBlockConnectionPointTypes.js";
import { NodeMaterialBlockTargets } from "../Enums/nodeMaterialBlockTargets.js";
import { RegisterClass } from "../../../Misc/typeStore.js";
/**
* Block used to get a random number
*/
export class RandomNumberBlock extends NodeMaterialBlock {
/**
* Creates a new RandomNumberBlock
* @param name defines the block name
*/
constructor(name) {
super(name, NodeMaterialBlockTargets.Neutral);
this.registerInput("seed", NodeMaterialBlockConnectionPointTypes.AutoDetect);
this.registerOutput("output", NodeMaterialBlockConnectionPointTypes.Float);
this._inputs[0].addExcludedConnectionPointFromAllowedTypes(NodeMaterialBlockConnectionPointTypes.Vector2 |
NodeMaterialBlockConnectionPointTypes.Vector3 |
NodeMaterialBlockConnectionPointTypes.Vector4 |
NodeMaterialBlockConnectionPointTypes.Color3 |
NodeMaterialBlockConnectionPointTypes.Color4);
}
/**
* Gets the current class name
* @returns the class name
*/
getClassName() {
return "RandomNumberBlock";
}
/**
* Gets the seed input component
*/
get seed() {
return this._inputs[0];
}
/**
* Gets the output component
*/
get output() {
return this._outputs[0];
}
/**
* Initialize the block and prepare the context for build
* @param state defines the state that will be used for the build
*/
initialize(state) {
// eslint-disable-next-line @typescript-eslint/no-floating-promises
this._initShaderSourceAsync(state.shaderLanguage);
}
async _initShaderSourceAsync(shaderLanguage) {
this._codeIsReady = false;
if (shaderLanguage === 1 /* ShaderLanguage.WGSL */) {
await import("../../../ShadersWGSL/ShadersInclude/helperFunctions.js");
}
else {
await import("../../../Shaders/ShadersInclude/helperFunctions.js");
}
this._codeIsReady = true;
this.onCodeIsReadyObservable.notifyObservers(this);
}
_buildBlock(state) {
super._buildBlock(state);
const output = this._outputs[0];
const comments = `//${this.name}`;
state._emitFunctionFromInclude("helperFunctions", comments);
state.compilationString += state._declareOutput(output) + ` = getRand(${this.seed.associatedVariableName}.xy);\n`;
return this;
}
}
let _Registered = false;
/**
* Register side effects for randomNumberBlock.
* Safe to call multiple times; only the first call has an effect.
*/
export function RegisterRandomNumberBlock() {
if (_Registered) {
return;
}
_Registered = true;
RegisterClass("BABYLON.RandomNumberBlock", RandomNumberBlock);
}
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