我是 Three Js 的新手，當我按下 html 頁面上的按鈕時，我不知道如何更改材質的顏色。您有什么建議嗎？我將在此處附上代碼這是我聲明我的材料的方式：  var color2= new THREE.Color(0xff0000)  var customMaterial = new THREE.ShaderMaterial(    {      uniforms: {        p: { type: "f", value: 2 },        glowColor: { type: "c", value: color2 },       },      vertexShader: $('#vertexShader').text,      fragmentShader: $('#fragmentShader').text,      side: THREE.DoubleSide,      blending: THREE.AdditiveBlending,         transparent: true,      depthWrite: false    });這是我更新顏色的方法：function render() {renderer.render(scene, camera);document.getElementById("colore").onclick= function(){  console.log("prova caramella");  var customMaterial = new THREE.ShaderMaterial(    {      uniforms: {        p: { type: "f", value: 2 },        glowColor: { type: "c", value: new THREE.Color(0x00ff00) },       },      vertexShader: $('#vertexShader').text,      fragmentShader: $('#fragmentShader').text,      side: THREE.DoubleSide,      blending: THREE.AdditiveBlending,         transparent: true,      depthWrite: false    });    customMaterial.needsUpdate = true }最后，這就是我將材質鏈接到 3D 模型的方式：function petali2(){var loaderpetali = new THREE.ColladaLoader();loaderpetali.load('petali3.dae', function (collada) {petali = collada.scene;petali.traverse( function ( child ) {  if (child instanceof THREE.Mesh) {    console.log(child);    child.material = customMaterial;   }} );petali.scale.x = 2;petali.scale.y = 2;petali.scale.z = 2;//flower = dae;scene.add(petali);});}