Autodesk forge 向Forge Viewer添加场景灯光

我想为我的Forge Viewer场景添加几个额外的灯光，但我找不到任何关于如何实现这一点的示例，我的尝试到目前为止都没有成功

我知道这篇文章：。这不是我要寻找的，我不想创建新的灯光预设，我想保留选定的灯光预设，并在模型周围添加额外的灯光，使其更加明亮

通过挖掘代码，我发现了以下功能：

  this.initLights = function ()
  {
    this.dir_light1 = new three__WEBPACK_IMPORTED_MODULE_30__["DirectionalLight"](_defaultDirLightColor, _defaultLightIntensity);
    this.dir_light1.position.copy(_lightDirDefault);
    this.highlight_dir_light1 = new three__WEBPACK_IMPORTED_MODULE_30__["DirectionalLight"](_defaultDirLightColor, _defaultLightIntensity);
    this.highlight_dir_light1.intensity = 1;
    this.highlight_dir_light1.position.copy(_lightDirDefault);

    //Note this color will be overridden by various light presets
    this.amb_light = new three__WEBPACK_IMPORTED_MODULE_30__["AmbientLight"](_defaultAmbientColor);
    this.highlight_amb_light = new three__WEBPACK_IMPORTED_MODULE_30__["AmbientLight"](_defaultAmbientColor);

    // Set this list only once, so that we're not constantly creating and deleting arrays each frame.
    // See https://www.scirra.com/blog/76/how-to-write-low-garbage-real-time-javascript for why.
    // use this.no_lights empty array if no lights are needed.
    this.lights = [this.dir_light1, this.amb_light];
    this.highlight_lights = [this.highlight_dir_light1, this.highlight_amb_light];

    //We do not add the lights to any scene, because we need to use them
    //in multiple scenes during progressive render.
    //this.scene.add(this.amb_light);

    // Attach the light to the camera, so that the light direction is applied in view-space.
    // Note:
    //
    //  1. For directional lights, the direction where the light comes from is determined by
    //     lightPosition - targetPosition, both in in world-space.
    //  2. The default target of dir lights is the world origin.
    //  3. Transforming the light object only affects the light position, but has no effect on the target.
    //
    // The goal is to rotate the lightDir with the camera, but keep it independent
    // of the camera position. Due to 3. above, we must also attach the light's target object to the camera.
    // Otherwise, the camera position would incorrectly be added to the light direction.
    this.camera.add(this.dir_light1);
    this.camera.add(this.dir_light1.target);
    this.camera.add(this.highlight_dir_light1);
    this.camera.add(this.highlight_dir_light1.target);

    _lightsInitialized = true;
  };

因此，我尝试按如下方式创建灯光，但没有成功：(

---

LMV使用自定义光源，因此需要将任何额外光源添加到

viewer.impl.lights

中才能生效：

const myExtraLight = new THREE.DirectionalLight(0xFF0000, 1.0);
viewer.impl.lights.push(myExtraLight)

注意：在您发布的查看器源代码中，光源也添加到渲染的灯光阵列中：

this.lights = [this.dir_light1, this.amb_light];

---

这似乎没有效果，我添加了一束红光（10），所以我希望看到我的模型以某种方式被照亮一点…这实际上是可行的，我的坏，但在我的模型中差异不明显。我只能注意到金属表面上微小的彩色光反射。。。

this.lights = [this.dir_light1, this.amb_light];