private initLights()

in backup/renderers/renderer-gsi-gl2/src/GSIGL2Renderer.ts [580:669]
89 lines of code
21 McCabe index (conditional complexity)

	private initLights() {
		if (this.props.lights) {
			// gltf to three
			if (this.props.lights.ambientLight) {
				const name = 'AmbientLight'
				let aLight: THREE.AmbientLight = this.lights.getObjectByName(name) as THREE.AmbientLight
				if (!aLight) {
					aLight = new THREE.AmbientLight()
					this.lights.add(aLight)
				}
				if (this.props.lights.ambientLight.color) {
					aLight.color = new THREE.Color(colorToString(this.props.lights.ambientLight.color))
				}

				aLight.intensity = this.props.lights.ambientLight.intensity ?? 1.0
				aLight.name = name
				aLight.matrixAutoUpdate = false
			}
			if (this.props.lights.directionalLights) {
				const dLights = this.props.lights.directionalLights
				dLights.forEach((item, index) => {
					const name = 'DirectionalLight.' + index
					let dlight: THREE.DirectionalLight = this.lights.getObjectByName(
						name
					) as THREE.DirectionalLight
					if (!dlight) {
						dlight = new THREE.DirectionalLight()
						this.lights.add(dlight)
					}
					if (item.color) {
						dlight.color = new THREE.Color(colorToString(item.color))
					}
					if (item.position) {
						dlight.position.copy(item.position as THREE.Vector3)
					}
					dlight.intensity = item.intensity ?? 1.0
					dlight.matrixAutoUpdate = false
					dlight.name = name
					dlight.updateMatrix()
					dlight.updateMatrixWorld(true)
				})
				// Remove
				this.lights.children.forEach((item) => {
					const type = item.name.split('.')[0]
					const i = item.name.split('.')[1]
					if (i === undefined) return
					const index = parseInt(i)
					if (isNaN(index)) return
					if (type === 'DirectionalLight' && index >= dLights.length) {
						this.lights.remove(item)
					}
				})
			}
			if (this.props.lights.pointLights) {
				const pLights = this.props.lights.pointLights
				pLights.forEach((item, index) => {
					const name = 'PointLight.' + index
					let plight: THREE.PointLight = this.lights.getObjectByName(name) as THREE.PointLight
					if (!plight) {
						plight = new THREE.PointLight()
						this.lights.add(plight)
					}
					if (item.color) {
						plight.color = new THREE.Color(colorToString(item.color))
					}
					if (item.position) {
						plight.position.copy(item.position as THREE.Vector3)
					}
					plight.intensity = item.intensity ?? 1.0
					plight.distance = item.range ?? 0.0
					plight.decay = 2 // physical
					plight.name = name
					plight.matrixAutoUpdate = false
					plight.updateMatrix()
					plight.updateMatrixWorld(true)
				})
				// Remove
				this.lights.children.forEach((item) => {
					const type = item.name.split('.')[0]
					const i = item.name.split('.')[1]
					if (i === undefined) return
					const index = parseInt(i)
					if (isNaN(index)) return
					if (type === 'PointLight' && index >= pLights.length) {
						this.lights.remove(item)
					}
				})
			}
		}
	}