polygonjs-engine/src/engine/nodes/sop/Delay.ts

node-based webgl 3D engine https://polygonjs.com

/**
 * Simple delay
 *
 * @remarks
 * This node outputs the exact same geometry as its input, but does so with a delay. This can be useful when some operations are not meant to run immediately.
 *
 */
import {TypedSopNode} from './_Base';
import {NodeParamsConfig, ParamConfig} from '../utils/params/ParamsConfig';
import {InputCloneMode} from '../../poly/InputCloneMode';
import {CoreGroup} from '../../../core/geometry/Group';
class DelaySopParamsConfig extends NodeParamsConfig {
	/** @param duration in milliseconds */
	duration = ParamConfig.INTEGER(1000, {
		range: [0, 1000],
		rangeLocked: [true, false],
	});
}
const ParamsConfig = new DelaySopParamsConfig();

export class DelaySopNode extends TypedSopNode<DelaySopParamsConfig> {
	params_config = ParamsConfig;
	static type() {
		return 'delay';
	}

	initializeNode() {
		this.io.inputs.setCount(1);
		this.io.inputs.initInputsClonedState(InputCloneMode.ALWAYS);
	}

	cook(inputs_contents: CoreGroup[]) {
		const core_group = inputs_contents[0];
		const c = () => {
			this.setCoreGroup(core_group);
		};
		setTimeout(c, Math.max(this.pv.duration, 0));
	}
}