declare onStart:()

in packages/layers/flyline/src/Grid.ts [59:135]
71 lines of code
15 McCabe index (conditional complexity)

	declare onStart: () => void
	declare onEnd: () => void
	declare onLand: () => void

	constructor(config) {
		this.conf = { ...confDefault, ...config }
		if (this.conf.type === 'empty') {
			return this
		}
		if (this.conf.type !== 'custom') {
			if (!this.conf.pointStart) {
				console.error('lack of pointStart')
			}
			if (!this.conf.pointEnd) {
				console.error('lack of pointEnd')
			}
		}

		/** @QianXun 头尾调换位置，让飞线的头和color的头一致 */
		if (this.conf.pointStart && this.conf.pointEnd) {
			this.conf.pointStart = transToVector3(this.conf.pointStart)
			this.conf.pointEnd = transToVector3(this.conf.pointEnd)
		}

		this.onStart = this.conf.onStart
		this.onEnd = this.conf.onEnd
		this.onLand = this.conf.onLand

		if (this.conf.type === 'onPlane') {
			this.points = getGrid2Bezier(
				this.conf.pointStart,
				this.conf.pointEnd,
				this.conf.segment,
				this.conf.minHeight,
				this.conf.maxHeight,
				this.conf.baseH,
				this.conf.incline
			)
		} else if (this.conf.type === 'onSphere' || this.conf.type === 'onShpere') {
			this.points = getGrid2BezierAddSlerp(
				this.conf.pointStart,
				this.conf.pointEnd,
				this.conf.segment,
				this.conf.radius,
				this.conf.minHeight,
				this.conf.maxHeight
			)
		} else if (this.conf.type === 'linear') {
			this.points = []
			for (let i = 0; i < this.conf.segment; i++) {
				const p = this.conf.pointStart.clone().lerp(this.conf.pointEnd, i / (this.conf.segment - 1))
				this.points[i * 3 + 0] = p.x
				this.points[i * 3 + 1] = p.y
				this.points[i * 3 + 2] = p.z
			}
		} else if (this.conf.type === 'sandwich') {
			this.points = getGrid2BezierMonotone(
				this.conf.pointStart,
				this.conf.pointEnd,
				this.conf.segment,
				this.conf.tension
			)
		} else if (this.conf.type === 'custom') {
			this.points = this.conf.points // 不生成轨道
			this.points = dimReduce(this.points)
			if (this.points.length / 3 !== this.conf.segment) {
				console.warn(`路径长度(${this.points.length / 3})与配置(${this.conf.segment})不符`)
				this.conf.segment = this.points.length / 3
			}
		} else {
			console.error('轨道生成器参数错误, type: ', this.conf.type)
		}

		this.padding = 0
		this.pointsBuffer = new this.conf.bufferType(this.points)
		this.updateBufferPadding(this.conf.padding)
	}