@polygonjs/polygonjs/src/engine/nodes/sop/utils/group/GroupByBoundingBoxHelper.ts

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

import {CADGroupSopNode} from '../../CADGroup';
import {Box3, Vector3} from 'three';
import {CoreEntity} from '../../../../../core/geometry/CoreEntity';
import {CoreEntitySelectionState, updateSelectionState} from './GroupCommon';

const bbox = new Box3();
const bboxHalfSize = new Vector3();
const entityPosition = new Vector3();

export class GroupByBoundingBoxHelper {
	constructor(private node: CADGroupSopNode) {}
	evalForEntities(allEntities: CoreEntity[], selectionStates: CoreEntitySelectionState) {
		bboxHalfSize.copy(this.node.pv.boundingBoxSize).multiplyScalar(0.5);
		bbox.min.copy(this.node.pv.boundingBoxCenter).sub(bboxHalfSize);
		bbox.max.copy(this.node.pv.boundingBoxCenter).add(bboxHalfSize);

		for (const entity of allEntities) {
			entity.position(entityPosition);
			updateSelectionState(selectionStates, entity, bbox.containsPoint(entityPosition));
		}
	}
}