Objects with Mesh lambert material not being generated while rendering graphics with three.js

问题

Well I just started learning three.js which is totally totally totally new to me. So I am writing these series of hello world kinda scrips.Well I wrote the script below to generate a cube with MeshBasicMaterial (Well this is just an exact copy of a tutorial given in a blog)

        var scene = new THREE.Scene(); 
        var camera = new THREE.PerspectiveCamera(75, 640/340, 0.1, 1000); 
        var renderer = new THREE.WebGLRenderer(); 

        renderer.setSize(640, 340); 
        document.body.appendChild(renderer.domElement);

        var geometry = new THREE.CubeGeometry(1,1,1); 
        var material = new THREE.MeshBasicMaterial({color: 0xD43001});
        var cube = new THREE.Mesh(geometry, material); 


        scene.add(cube); 
        camera.position.z = 5; 

        var render = function (){

                requestAnimationFrame(render); 

                cube.rotation.x += 0.1; 
                cube.rotation.y += 0.1; 

                renderer.render(scene, camera); 

            };

            render();

The script above generates a cube which rotates continuously now when I change the material of the cube from

var material = new THREE.MeshBasicMaterial({color: 0xD43001});

to

var material = new THREE.MeshLambertMaterial({color: 0xD43001});

nothing gets displayed. WHat exctly am I missing?

UPDATE

So i had to add a light source to display an object made out of mesh lambert material.When I added a point light the object got displayed.

回答1:

This is because MeshBasicMaterial does not react to lighting but has a constant colour.

A MeshLambertMaterial however, does react to lighting, so without light, you cannot see it! The same goes for MeshPhongMaterial.

来源：https://stackoverflow.com/questions/21215585/objects-with-mesh-lambert-material-not-being-generated-while-rendering-graphics