如何在 Autodesk Forge 中对缓冲区几何对象进行分组答案

【问题标题】：How to group Buffer Geometry Object in Autodesk Forge如何在 Autodesk Forge 中对缓冲区几何对象进行分组
【发布时间】：2021-10-27 02:31:15
【问题描述】：

我想知道是否可以从场景构建器中添加一组模型组。最初我使用了一个 overlay.addMesh，但我想与我创建的自定义对象进行交互。不幸的是，该对象必须是一个分组。这是我的代码。我的查看器上没有显示任何内容。

this.sceneBuilder = await this.viewer.loadExtension(
  "Autodesk.Viewing.SceneBuilder"
);
this.modelBuilder = await this.sceneBuilder.addNewModel({
  modelNameOverride: "Beacon",
  conserveMemory: false,
});
const sphereGeometry = new THREE.BufferGeometry().fromGeometry(
  new THREE.SphereGeometry(5, 8, 8)
);
const sphereMaterial = new THREE.MeshPhongMaterial({
  color: new THREE.Color(0.647, 0.165, 0.165),
});

this.meshBeacon = new THREE.Mesh(sphereGeometry, sphereMaterial);
this.meshBeacon2 = new THREE.Mesh(sphereGeometry, sphereMaterial);
this.meshBeacon.matrix = new THREE.Matrix4().compose(
  position1,
  quaternion,
  scale
);
this.meshBeacon2.matrix = new THREE.Matrix4().compose(
  position2,
  quaternion,
  scale
);

this.group = new THREE.Group();
this.group.add(this.meshBeacon);
this.group.add(this.meshBeacon2);
console.log(this.group);
this.group.dbId = 666666;
this.modelBuilder.addMesh(this.group);

【问题讨论】：

标签： three.js autodesk-forge autodesk-viewer buffer-geometry

【解决方案1】：

我们需要先创建单个几何体。全部由这段代码完成。

let modelGeometry = new THREE.Geometry();
const globalMaterial = new THREE.MeshBasicMaterial({ color: 0xff0000 });
const head = new THREE.SphereGeometry(0.5, 32, 16);
const body = new THREE.SphereGeometry(0.5, 32, 16);
const textGeometry = new THREE.TextGeometry("text ID", {
  font: "monaco",
  size: 1,
  height: 0,
  curveSegments: 3,
});

textGeometry.computeBoundingBox();
const textMaterial = new THREE.MeshBasicMaterial({ color: 0xff0000 });

const workerId = new THREE.Mesh(textGeometry, textMaterial);

const headMesh = new THREE.Mesh(head, globalMaterial);
const bodyMesh = new THREE.Mesh(body, globalMaterial);
headMesh.matrix.setPosition(new THREE.Vector3(0, 0, 3));
bodyMesh.matrix.scale(new THREE.Vector3(1, 1, 4));
// bodyMesh.matrix.scale(new THREE.Vector3(0.1, 0.1, 0.1));
modelGeometry.merge(headMesh.geometry, headMesh.matrix);
modelGeometry.merge(bodyMesh.geometry, bodyMesh.matrix);
modelGeometry.merge(workerId.geometry, workerId.matrix);

【讨论】：