@babylonjs/viewer/dist/chunks/flowGraphThrottleBlock-CltsuEhW.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 { f as RichTypeNumber } from './declarationMapper-rcGCdcDP.esm.js';
import { b as FlowGraphExecutionBlockWithOutSignal } from './KHR_interactivity-Bmb38TjL.esm.js';
import { R as RegisterClass } from './index-FzOfPXLV.esm.js';
import './objectModelMapping-CJnQ6at_.esm.js';

/**
 * 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 */;
    }
}
RegisterClass("FlowGraphThrottleBlock" /* FlowGraphBlockNames.Throttle */, FlowGraphThrottleBlock);

export { FlowGraphThrottleBlock };
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