The light in the Three.js

The following is the Three.js 90 version of the study notes, the subsequent three.js API changes I do not know, for reference only

There are several types of light in Three.js:

Ambientlight	Ambient light
DirectionalLight	Parallel light
Hemispherelight	Hemisphere light
Pointlight	Point Light
Rectarealight	Rectangular area Light
SpotLight	Concentrator

Ambient light

Ambient light illuminates all objects in the scene, but it does not have a direction, so the object does not appear shaded.

var light = new three. Ambientlight (0x404040); Scene.add (light);

Light spot in rectangular region of light with parallel light hemisphere light

The light in the Three.js