Why MeshMatcapMaterial is renderer as MeshBasicMaterial?

Questions
1

Hello.
In examples(link or link) meshes are rendered correct (illuminates with shadow) but in my snippet, the mesh is rendered without lights or shadows (flat). How to reach results in examples?

// Simple three.js example

import * as THREE from "https://cdn.skypack.dev/three@0.136.0/build/three.module.js";
import { OrbitControls } from "https://cdn.skypack.dev/three@0.136.0/examples/jsm/controls/OrbitControls.js";

var mesh, renderer, scene, camera, controls;

init();
animate();
const API = {
   color: 0xffffff, // sRGB
   exposure: 1.0
   };
function init() {

    // renderer
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setClearColor( 0xffffff, 1 );
    renderer.toneMapping = THREE.ACESFilmicToneMapping;
    renderer.outputEncoding = THREE.sRGBEncoding;
    document.body.appendChild( renderer.domElement );

    // scene
    scene = new THREE.Scene();
    
    // camera
    camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 10000 );
    camera.position.set( 40, 40, 40 );

    // controls
    controls = new OrbitControls( camera, renderer.domElement );
    
    // ambient
    scene.add( new THREE.AmbientLight( 0x222222 ) );
    
    // light
    var light = new THREE.DirectionalLight( 0xffffff, 1 );
    light.position.set( 20,20, 0 );
    scene.add( light );
    
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );
    let size = 200;
    let divisions = 10;

    var gridHelper = new THREE.GridHelper(size, divisions);
    scene.add(gridHelper);

    // geometry
    var geometry = new THREE.SphereGeometry( 15, 12, 8 );
    
    // material
    var material = new THREE.MeshMatcapMaterial( {
        color: 0xc8c8c8, 
        flatShading: true
        } );
    
    // mesh
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    
}

function animate() {

    requestAnimationFrame( animate );
    
    //controls.update();

    renderer.render( scene, camera );
    mesh.rotation.y += 0.01;

}

window.addEventListener( 'resize', onWindowResize, false );

function onWindowResize(){

    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize( window.innerWidth, window.innerHeight );
}

Jsfiddle.
Screenshot:

Π‘Π½ΠΈΠΌΠΎΠΊ экрана ΠΎΡ‚ 2022-02-15 23-55-29
Π‘Π½ΠΈΠΌΠΎΠΊ экрана ΠΎΡ‚ 2022-02-15 23-55-291920Γ—1080 133 KB

2

you haven’t set any matcap texture.

my example : MeshMatcapMaterial - Three.js Tutorials (sbcode.net)
official docs : MeshMatcapMaterial – three.js docs (threejs.org)

1 Like
3

This is r137 feature (in fact, I would like to know how to turn it off, lol), and you use r136

edit: found corresponding PR