@babylonjs/core
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JavaScript
import { RichTypeBoolean } from "../../../flowGraphRichTypes.js";
import { RegisterClass } from "../../../../Misc/typeStore.js";
import { FlowGraphExecutionBlockWithOutSignal } from "../../../flowGraphExecutionBlockWithOutSignal.js";
import { Logger } from "../../../../Misc/logger.js";
/**
* A block that executes a branch while a condition is true.
*/
export class FlowGraphWhileLoopBlock extends FlowGraphExecutionBlockWithOutSignal {
constructor(
/**
* the configuration of the block
*/
config) {
super(config);
this.config = config;
this.condition = this.registerDataInput("condition", RichTypeBoolean);
this.executionFlow = this._registerSignalOutput("executionFlow");
this.completed = this._registerSignalOutput("completed");
// unregister "out" signal
this._unregisterSignalOutput("out");
}
_execute(context, _callingSignal) {
let conditionValue = this.condition.getValue(context);
if (this.config?.doWhile && !conditionValue) {
this.executionFlow._activateSignal(context);
}
let i = 0;
while (conditionValue) {
this.executionFlow._activateSignal(context);
++i;
if (i >= FlowGraphWhileLoopBlock.MaxLoopCount) {
Logger.Warn("FlowGraphWhileLoopBlock: Max loop count reached. Breaking.");
break;
}
conditionValue = this.condition.getValue(context);
}
// out is not triggered - completed is triggered
this.completed._activateSignal(context);
}
getClassName() {
return "FlowGraphWhileLoopBlock" /* FlowGraphBlockNames.WhileLoop */;
}
}
/**
* The maximum number of iterations allowed in a loop.
* This can be set to avoid an infinite loop.
*/
FlowGraphWhileLoopBlock.MaxLoopCount = 1000;
RegisterClass("FlowGraphWhileLoopBlock" /* FlowGraphBlockNames.WhileLoop */, FlowGraphWhileLoopBlock);
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