【Interactive 3D Graphics】Exercise: Diffuse Material

开始先说说MeshLambertMaterial和MeshBasicMaterial。

MeshBasicMaterial:A material for drawing geometries in a simple shaded (flat or wireframe) way.
MeshLambertMaterial:A material for non-shiny (Lambertian) surfaces, evaluated per vertex.
MeshLambertMaterial比MeshBasicMaterial多了一些属性，比如ambient、emissive

function createBall() {
	// Do not change the color itself, change the material and use the ambient and diffuse components.
	//var material = new THREE.MeshBasicMaterial( { color: 0xFFFF00, shading: THREE.FlatShading ,wireframeLinecap:"round",wireframe:true} );
	var material=new THREE.MeshLambertMaterial({color:0x800000,ambient:0x000080,emissive:0x000000,shading: THREE.FlatShading});
	var sphere = new THREE.Mesh( new THREE.SphereGeometry( 400, 64, 32 ), material );
	return sphere;
}