如何将唯一 ID 嵌入模型构建器并加载多个模型？

Question

我有一些关于 modelBuilder 和 AggregateSelection 的问题。

当我使用场景构建器加载一些模型时，我可以将唯一 ID 嵌入到模型中吗？ dbId 似乎只适用于网格。

是否可以加载多个SceneBuilder模型？. （不仅仅是模型构建器中的一些对象）。我想制作一个可以单击对象并能够移动它的工具。但是发生的是模型构建器中的所有对象都移动了。

 addBox(dbId, position, rotation) {
 this.viewer
   .loadExtension("Autodesk.Viewing.SceneBuilder")
   .then((builder) => {
     this.sceneBuilder = builder;
     return this.sceneBuilder.addNewModel({
       modelNameOverride: "box",
       conserveMemory: false,
     });
   })
   .then((builder) => {
     console.log("model builder created");
     let modelBuilder = builder;
     const box = new THREE.BoxGeometry(1, 1, 1);
     const boxBuff = new THREE.BufferGeometry().fromGeometry(box);
     this.box = new THREE.Mesh(boxBuff, this.globalMaterial);
     this.box.dbId = dbId;
     modelBuilder.addMesh(this.box);
   });
}

 addSphere(dbId, position, rotation) {
 this.viewer
   .loadExtension("Autodesk.Viewing.SceneBuilder")
   .then((builder) => {
     this.sceneBuilder = builder;
     return this.sceneBuilder.addNewModel({
       modelNameOverride: "sphere",
       conserveMemory: false,
     });
   })
   .then((builder) => {
     let modelBuilder = builder;
     console.log("model builder created");
     let modelBuilder = builder;
     const sphere = new THREE.SphereGeometry(0.5, 32, 16);
     const sphereBuff = new THREE.BufferGeometry().fromGeometry(sphere);
     this.sphere = new THREE.Mesh(boxBuff, this.globalMaterial);
     this.sphere.dbId = dbId;
     modelBuilder.addMesh(this.sphere);
   });

}

Answer 1

根据用于生成 Forge 模型的种子 CAD 软件，externalId 属性可能已经包含合适的唯一 ID。

Unique IDs for Forge Viewer Elements 上的文章从 Revit 的角度对此进行了解释。

Answer 2

无法将自定义 ID 分配给使用 SceneBuilder 扩展创建的实际模型（Forge Viewer 会自动为所有模型分配序列号），但您可以分配使用 mesh.dbId 属性.

完全按照您在代码片段中所做的那样，为单个 meshes 自定义 dbID

顺便说一句。您可以使用 ModelBuilder#changeFragmentTransform 方法轻松操作模型中的单个网格。以下两个函数向查看器插入一个长方体和一个球体，这些对象中的每一个都将以不同的方式进行动画处理：

async function addBoxModel(viewer, dbid, position = new THREE.Vector3(0, 0, 0), orientation = new THREE.Quaternion(0, 0, 0, 1), scale = new THREE.Vector3(1, 1, 1)) {
    const sceneBuilder = await viewer.loadExtension('Autodesk.Viewing.SceneBuilder');
    const modelBuilder = await sceneBuilder.addNewModel({
        modelNameOverride: 'box',
        conserveMemory: false
    });
    const mesh = new THREE.Mesh(
        new THREE.BufferGeometry().fromGeometry(new THREE.BoxGeometry(10, 10, 10)),
        new THREE.MeshPhongMaterial({ color: new THREE.Color(1, 0, 0) })
    );
    mesh.matrix = new THREE.Matrix4().compose(position, orientation, scale);
    mesh.dbId = dbid;
    modelBuilder.addMesh(mesh);

    // Animate the object, rotating it around the Z axis
    let angle = 0;
    setInterval(() => {
        const offset = new THREE.Vector3(100.0 * Math.cos(angle), 100.0 * Math.sin(angle), 0.0);
        const matrix = new THREE.Matrix4().compose(offset.add(position), orientation, scale);
        modelBuilder.changeFragmentTransform(mesh, matrix);
        viewer.impl.invalidate(true, true, true);
        angle += Math.PI / 50;
    }, 100);
}

async function addSphereModel(viewer, dbid, position = new THREE.Vector3(0, 0, 0), orientation = new THREE.Quaternion(0, 0, 0, 1), scale = new THREE.Vector3(1, 1, 1)) {
    const sceneBuilder = await viewer.loadExtension('Autodesk.Viewing.SceneBuilder');
    const modelBuilder = await sceneBuilder.addNewModel({
        modelNameOverride: 'box',
        conserveMemory: false
    });
    const mesh = new THREE.Mesh(
        new THREE.BufferGeometry().fromGeometry(new THREE.SphereGeometry(10.0, 16, 16)),
        new THREE.MeshPhongMaterial({ color: new THREE.Color(0, 1, 0) })
    );
    mesh.matrix = new THREE.Matrix4().compose(position, orientation, scale);
    mesh.dbId = dbid;
    modelBuilder.addMesh(mesh);

    // Animate the object, rotating it around the X axis
    let angle = 0;
    setInterval(() => {
        const offset = new THREE.Vector3(0.0, 100.0 * Math.cos(angle), 100.0 * Math.sin(angle));
        const matrix = new THREE.Matrix4().compose(offset.add(position), orientation, scale);
        modelBuilder.changeFragmentTransform(mesh, matrix);
        viewer.impl.invalidate(true, true, true);
        angle += Math.PI / 50;
    }, 100);
}

如何将唯一 ID 嵌入模型构建器并加载多个模型？

How to embed unique Id to modelBuilder and load multiple model?

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