@polygonjs/polygonjs/src/engine/functions/_GetObjectHoveredState.ts

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

// import {Ref} from '@vue/reactivity';
// import {Object3D, Intersection} from 'three';
// import {isBooleanTrue} from '../../core/Type';
// import {RaycasterUpdateOptions} from '../scene/utils/events/PointerEventsController';
// import {ObjectNamedFunction0, ObjectNamedFunction4} from './_Base';

// const _intersectionByObject: WeakMap<Object3D, Intersection[]> = new Map();
// const _lastIntersectionStateByObject: Map<Object3D, boolean> = new Map();
// const raycastUpdateOptions: RaycasterUpdateOptions = {
// 	pointsThreshold: 0.1,
// 	lineThreshold: 0.1,
// };

// function _getObjectHoveredIntersections(object3D: Object3D): Intersection[] {
// 	let intersections = _intersectionByObject.get(object3D);
// 	if (!intersections) {
// 		intersections = [];
// 		_intersectionByObject.set(object3D, intersections);
// 	}
// 	return intersections;
// }
// export class getObjectHoveredIntersection extends ObjectNamedFunction0 {
// 	static override type() {
// 		return 'getObjectHoveredIntersection';
// 	}
// 	func(object3D: Object3D): Intersection {
// 		return _getObjectHoveredIntersections(object3D)[0];
// 	}
// }

// export class getObjectHoveredState extends ObjectNamedFunction4<[boolean, number, number, Ref<Intersection | null>]> {
// 	static override type() {
// 		return 'getObjectHoveredState';
// 	}
// 	func(
// 		object3D: Object3D,
// 		traverseChildren: boolean,
// 		pointsThreshold: number,
// 		lineThreshold: number,
// 		intersectionRef: Ref<Intersection | null>
// 	): boolean {
// 		const pointerEventsController = this.scene.eventsDispatcher.pointerEventsController;
// 		const raycaster = pointerEventsController.raycaster();
// 		raycastUpdateOptions.pointsThreshold = pointsThreshold;
// 		raycastUpdateOptions.lineThreshold = lineThreshold;
// 		pointerEventsController.updateRaycast(raycastUpdateOptions);

// 		const intersections = _getObjectHoveredIntersections(object3D);
// 		intersections.length = 0;
// 		raycaster.value.intersectObject(object3D, isBooleanTrue(traverseChildren), intersections);
// 		const firstIntersection = intersections[0];
// 		intersectionRef.value = firstIntersection || null;
// 		const newHoveredState = firstIntersection != null;
// 		return newHoveredState;
// 	}
// }