constructor()

in packages/core/gsi/src/polaris/PolarisGSI.ts [110:202]
77 lines of code
10 McCabe index (conditional complexity)

	constructor(props: PolarisGSIProps) {
		const mergedProps = {
			...defaultPolarisGSIProps,
			...props,
		}
		super(mergedProps)

		this.matrixProcessor = mergedProps.matrixProcessor
		this.boundingProcessor = mergedProps.boundingProcessor
		this.graphProcessor = mergedProps.graphProcessor
		this.cullingProcessor = mergedProps.cullingProcessor

		this.view = {
			html: new HtmlView(),
			gsi: new GSIView(),
		}
		for (const key in this.view) {
			this.view[key].init(this)
		}

		/**
		 * init html / canvas
		 */
		const container = mergedProps.container as HTMLDivElement

		// render html view
		this.view.html.element
		this.view.html.element.style.position = 'relative'
		this.view.html.element.style.width = this.width + 'px'
		this.view.html.element.style.height = this.height + 'px'
		this.view.html.element.style.overflow = 'hidden'
		this.view.html.element.className = 'polaris-wrapper'
		container.appendChild(this.view.html.element)
		this.addEventListener('dispose', () => this.view.html.element.remove())

		// pointer 事件
		this._initPointerEvents()

		// 相机控制事件
		if (mergedProps.cameraControl) {
			if (isTouchDevice) {
				this.cameraControl = new TouchControl({
					camera: this.cameraProxy,
					element: this.view.html.element as HTMLElement,
				})
			} else {
				this.cameraControl = new PointerControl({
					camera: this.cameraProxy,
					element: this.view.html.element as HTMLElement,
				})
			}
			this.cameraControl.scale = 1.0 / (this.ratio ?? 1.0)

			this.addEventListener('dispose', () => this.cameraControl?.dispose())
		}

		/**
		 * Props listener
		 */

		// Responsive for container resize
		this.watchProps(
			['autoResize'],
			() => {
				const autoResize = this.getProp('autoResize')
				if (autoResize) {
					if (!this._resizeListener) {
						this._resizeListener = setInterval(() => {
							const width = container.clientWidth
							const height = container.clientHeight
							if (width !== this.width || height !== this.height) {
								this.resize(width, height, this.ratio)
							}
						}, 200)
					}
				} else if (this._resizeListener) {
					clearInterval(this._resizeListener)
					this._resizeListener = undefined
				}
			},
			true
		)

		// static props (shall not change these props)
		this.watchProps(
			['matrixProcessor', 'boundingProcessor', 'graphProcessor', 'cullingProcessor'],
			(e) => {
				const msg = `Do not modify static props: [${e.changedKeys.join(',')}]`
				this.dispatchEvent({ type: 'error', error: new Error(msg) })
				console.error(msg)
			}
		)
	}