@babylonjs/viewer/dist/chunks/flowGraphThrottleBlock-BqC1Nbi0.esm.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

import { d as RichTypeNumber } from './declarationMapper-CqO08-WM.esm.js';
import { c as FlowGraphExecutionBlockWithOutSignal } from './KHR_interactivity-CEwUaqxQ.esm.js';
import { u as RegisterClass } from './index-MZPybX0H.esm.js';
import './objectModelMapping-De5EKNEZ.esm.js';
import './spotLight.pure-CRdZC6Ci.esm.js';

/** This file must only contain pure code and pure imports */
/**
 * A block that throttles the execution of its output flow.
 */
class FlowGraphThrottleBlock extends FlowGraphExecutionBlockWithOutSignal {
    constructor(config) {
        super(config);
        this.reset = this._registerSignalInput("reset");
        this.duration = this.registerDataInput("duration", RichTypeNumber);
        this.lastRemainingTime = this.registerDataOutput("lastRemainingTime", RichTypeNumber, NaN);
    }
    _execute(context, callingSignal) {
        if (callingSignal === this.reset) {
            this.lastRemainingTime.setValue(NaN, context);
            context._setExecutionVariable(this, "lastRemainingTime", NaN);
            context._setExecutionVariable(this, "timestamp", 0);
            return;
        }
        // in seconds
        const durationValue = this.duration.getValue(context);
        if (durationValue <= 0 || isNaN(durationValue) || !isFinite(durationValue)) {
            return this._reportError(context, "Invalid duration in Throttle block");
        }
        const lastRemainingTime = context._getExecutionVariable(this, "lastRemainingTime", NaN);
        // Using Date.now() to get ms since epoch. not using performance.now() because its precision is not needed here
        const currentTime = Date.now();
        if (isNaN(lastRemainingTime)) {
            this.lastRemainingTime.setValue(0, context);
            context._setExecutionVariable(this, "lastRemainingTime", 0);
            context._setExecutionVariable(this, "timestamp", currentTime);
            // according to glTF interactivity specs
            return this.out._activateSignal(context);
        }
        else {
            const elapsedTime = currentTime - context._getExecutionVariable(this, "timestamp", 0);
            // duration is in seconds, so we need to multiply by 1000
            const durationInMs = durationValue * 1000;
            if (durationInMs <= elapsedTime) {
                this.lastRemainingTime.setValue(0, context);
                context._setExecutionVariable(this, "lastRemainingTime", 0);
                context._setExecutionVariable(this, "timestamp", currentTime);
                return this.out._activateSignal(context);
            }
            else {
                const remainingTime = durationInMs - elapsedTime;
                // output is in seconds
                this.lastRemainingTime.setValue(remainingTime / 1000, context);
                context._setExecutionVariable(this, "lastRemainingTime", remainingTime);
            }
        }
    }
    /**
     * @returns class name of the block.
     */
    getClassName() {
        return "FlowGraphThrottleBlock" /* FlowGraphBlockNames.Throttle */;
    }
}
let _Registered = false;
/**
 * Register side effects for flowGraphThrottleBlock.
 * Safe to call multiple times; only the first call has an effect.
 */
function RegisterFlowGraphThrottleBlock() {
    if (_Registered) {
        return;
    }
    _Registered = true;
    RegisterClass("FlowGraphThrottleBlock" /* FlowGraphBlockNames.Throttle */, FlowGraphThrottleBlock);
}

/**
 * Re-exports pure implementation and applies runtime side effects.
 * Import flowGraphThrottleBlock.pure for tree-shakeable, side-effect-free usage.
 */
RegisterFlowGraphThrottleBlock();

export { FlowGraphThrottleBlock, RegisterFlowGraphThrottleBlock };
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