这是我的对象的构造函数:
<code>class Something {
constructor(mesh = undefined, material = undefined) {
this.mesh = undefined;
material = material;
this.gui = undefined;
if (mesh) {
this.mesh_opacity = 1;
this.created = true;
this.mesh = new THREE.Mesh(mesh.geometry, new THREE.MeshPhongMaterial({
// wireframe: true,
transparent : true,
opacity: this.mesh_opacity,
color : 0xffffff
}));
}
</code>
我将此对象添加到场景中,在我的界面中,我有一个滑块,我可以使用此函数更改对象的不透明度:
<code><script type="text/javascript">
$('#slider').on('change', function(){
val = $("#slider").val();
scene.something.mesh_opacity = val;
scene.something.material = new THREE.MeshPhongMaterial({
transparent : true,
opacity: val,
color : 0xffffff
});
scene.something.material.needsUpdate = true;
})
</script></code>
但在我的场景中,我没有看到任何更新。如何立即更新场景中不透明度的变化?
答案 0 :(得分:3)
Opacity的值介于0.0 - 1.0
之间。您需要将滑块中的值(通常为0 - 100
)除以100.如下所示:
val = $("#slider").val() / 100;
其他选项,如prisoner849所述,是手动设置滑块值:
<input type="range" id="slider" min="0" max="1" step="0.01" value="0.5" class="slider">
允许您直接获取值:
val = $("#slider").val();
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(
45,
window.innerWidth / window.innerHeight,
1,
100
);
var renderer = new THREE.WebGLRenderer();
var light = new THREE.PointLight(0xcccccc, 1);
light.castShadows = true;
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var geometry = new THREE.SphereGeometry(1, 20, 20);
var material = new THREE.MeshPhongMaterial({
transparent: true,
opacity: 1,
color: 0xffffff
});
var sphere = new THREE.Mesh(geometry, material);
scene.add(sphere);
scene.add(light);
camera.position.z = 5;
light.position.x = 5;
light.position.y = 5;
light.position.z = 5;
document.getElementById("slider").addEventListener("change", function() {
sphere.material.opacity = document.getElementById("slider").value;
});
var render = function() {
requestAnimationFrame(render);
renderer.render(scene, camera);
};
render();
body {
margin: 0;
overflow: hidden;
}
canvas {
width: 100%;
height: 100%
}
.slider {
position: absolute;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/87/three.min.js"></script>
<input type="range" id="slider" min="0" max="1" step="0.01" value="0.5" class="slider">
此外,您不需要每次都创建新材质(它会降低整个渲染过程的速度)。您应该直接编辑应用的材料,如下所示:
scene.something.material.opacity = val;
R87