@polygonjs/polygonjs/src/engine/nodes/obj/utils/helpers/SpotLightHelper.ts

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

// import {SpotLightObjNode} from '../../SpotLight';
// import {BaseLightHelper} from './_BaseLightHelper';
// import {SpotLight} from 'three';
// import {BufferGeometry} from 'three';
// import {Float32BufferAttribute} from 'three';
// import {LineBasicMaterial} from 'three';
// import {LineSegments} from 'three';
// import {Vector3} from 'three';
// import {Mesh} from 'three';
// import {Object3D} from 'three';

// interface UpdateConeObjectOptions {
// 	sizeMult: number;
// 	distance: number;
// 	angle: number;
// }
// export class SpotLightHelper extends BaseLightHelper<Mesh, SpotLight, SpotLightObjNode> {
// 	createObject() {
// 		return new Mesh();
// 	}
// 	private _cone = new LineSegments();
// 	private _line_material = new LineBasicMaterial({fog: false});

// 	static buildConeGeometry() {
// 		const geometry = new BufferGeometry();

// 		const positions = [0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, -1, 1];

// 		for (let i = 0, j = 1, l = 32; i < l; i++, j++) {
// 			const p1 = (i / l) * Math.PI * 2;
// 			const p2 = (j / l) * Math.PI * 2;

// 			positions.push(Math.cos(p1), Math.sin(p1), 1, Math.cos(p2), Math.sin(p2), 1);
// 		}

// 		geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
// 		return geometry;
// 	}
// 	private static _matrix_scale = new Vector3();
// 	static updateConeObject(object: Object3D, options: UpdateConeObjectOptions) {
// 		const coneLength = (options.distance ? options.distance : 1000) * options.sizeMult;
// 		const coneWidth = coneLength * Math.tan(options.angle);

// 		this._matrix_scale.set(coneWidth, coneWidth, coneLength);
// 		object.matrix.identity();
// 		object.matrix.makeRotationX(Math.PI * 0.5);
// 		object.matrix.scale(this._matrix_scale);
// 	}

// 	protected buildHelper() {
// 		this._cone.geometry = SpotLightHelper.buildConeGeometry();
// 		this._cone.material = this._line_material;
// 		this._cone.matrixAutoUpdate = false;

// 		this.object.add(this._cone);
// 	}

// 	update() {
// 		SpotLightHelper.updateConeObject(this._cone, {
// 			sizeMult: this.node.pv.helperSize,
// 			distance: this.node.light.distance,
// 			angle: this.node.light.angle,
// 		});

// 		this._line_material.color.copy(this.node.light.color);
// 	}
// }