Orillusion

目前Web端的相关数字孪生项目大部分都是用threejs 实现的，建议先考虑threejs， webgpu 可参考的案例相对较少

自动生成管路，你需要自定义shader, 根据管道的形状参数，或者说是sharp, 以及要生成管子的顶点密度，构建自己的输入顶点参数， 在WebGPU和WebGL中是没有GeomtryShader的，在vertex shader中构建管子的三角面，基本思路就是这样的，或者通过compute shader计算

@猪子 在 LitMaterial 与 PhysicMaterial 两个材质有什么区别？似乎都是PBR材质 中说：

PhysicMaterial

确实官方没有提供任何案例

LitMaterial 与 PhysicMaterial 两个材质有什么区别？似乎都是PBR材质

public initDefault() {
        console.time('texture')
        this.normalTexture = this.createTexture(32, 32, 255 * 0.5, 255 * 0.5, 255.0, 255.0, 'default-normalTexture');
        this.maskTexture = this.createTexture(32, 32, 255, 255 * 0.5, 255.0, 255.0, 'default-maskTexture');
        this.whiteTexture = this.createTexture(32, 32, 255, 255, 255, 255, 'default-whiteTexture');
        this.blackTexture = this.createTexture(32, 32, 0, 0, 0, 255.0, 'default-blackTexture');
        this.redTexture = this.createTexture(32, 32, 255, 0, 0, 255.0, 'default-redTexture');
        this.blueTexture = this.createTexture(32, 32, 0, 0, 255, 255.0, 'default-blueTexture');
        this.greenTexture = this.createTexture(32, 32, 0, 255, 0, 255, 'default-greenTexture');
        this.yellowTexture = this.createTexture(32, 32, 0, 255, 255, 255.0, 'default-yellowTexture');
        this.grayTexture = this.createTexture(32, 32, 128, 128, 128, 255.0, 'default-grayTexture');

        let brdf = new BRDFLUTGenerate();
        let brdf_texture = brdf.generateBRDFLUTTexture();
        let BRDFLUT = brdf_texture.name = 'BRDFLUT';
        this.addTexture(BRDFLUT, brdf_texture);

        this.defaultSky = new HDRTextureCube();
        this.defaultSky.createFromTexture(128, this.blackTexture);

        Reference.getInstance().attached(this.defaultSky, this);
        Reference.getInstance().attached(brdf_texture, this);

        Reference.getInstance().attached(this.normalTexture, this);
        Reference.getInstance().attached(this.maskTexture, this);
        Reference.getInstance().attached(this.whiteTexture, this);
        Reference.getInstance().attached(this.blackTexture, this);
        Reference.getInstance().attached(this.redTexture, this);
        Reference.getInstance().attached(this.blueTexture, this);
        Reference.getInstance().attached(this.greenTexture, this);
        Reference.getInstance().attached(this.yellowTexture, this);
        Reference.getInstance().attached(this.grayTexture, this);
        this.defaultGUITexture = new GUITexture(this.whiteTexture);
        this.defaultGUISprite = new GUISprite(this.defaultGUITexture);
        this.defaultGUISprite.trimSize.set(4, 4)

        this.defaultMaterial = new LitMaterial();
        console.timeEnd('texture')
    }

测试的结果是 9毫秒

老师，想获得该系列培训的PPT，在哪里可以下载到？

// 新建对象
const obj = new Object3D();
// 为对象添 MeshRenderer
let mr = obj.addComponent(MeshRenderer);
// 设置几何体
mr.geometry = new BoxGeometry(5, 5, 5);
// 设置材质
mr.material = new LitMaterial();

这段代码中，BoxGeometry 与 LitMaterial 可以也作为组件的方式加入，例如：

// 新建对象
const obj = new Object3D();
// 为对象添 MeshRenderer
let mr = obj.addComponent(MeshRenderer);
// 设置几何体
let geo = mr.addComponentnew(BoxGeometry);
geo.init(5, 5, 5);
// 设置材质
let mat = mr.addComponentnew(LitMaterial);

目前web端通用的格式是GLTF/GLB格式，FBX格式，或者USDZ格式