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wzjs 2025/8/21 21:47:17

做网站关键词,最新营销模式,企业网站优化问题,武汉网页制作速成班把模型投影到工程图要用什么模块当工程图的画板，最后要导出dxf的 three是怎么读取他的3d数据的 mesh不是三角形吗怎么渲染出四边形面的我想看到三角形的边怎么设置 ai让我干嘛我就干嘛 static getAllEdges(face: { positions: Float32Array; indices: Uint16Array …

把模型投影到工程图要用什么模块当工程图的画板，最后要导出dxf的

three是怎么读取他的3d数据的

mesh不是三角形吗怎么渲染出四边形面的

我想看到三角形的边怎么设置

~~ai让我干嘛我就干嘛~~

    static getAllEdges(face: { positions: Float32Array; indices: Uint16Array | Uint32Array }) {const pointsMap = new Map<string, { count: number; points: number[] }>();for (let i = 0; i < face.indices.length; i += 3) {this.addEdge(pointsMap, face, face.indices[i], face.indices[i + 1]);this.addEdge(pointsMap, face, face.indices[i + 1], face.indices[i + 2]);this.addEdge(pointsMap, face, face.indices[i + 2], face.indices[i]);}return {outlineEdges: new Float32Array(Array.from(pointsMap.values()).filter((v) => v.count === 1).flatMap((entry) => entry.points),),sharedEdges: new Float32Array(Array.from(pointsMap.values()).filter((v) => v.count > 1).flatMap((entry) => entry.points),),};}

    private generateShape() {const mesh = this.geometryNode.mesh;if (mesh?.faces?.positions.length) {this.initFaces(mesh.faces);// 获取所有边const allEdges = MeshUtils.getAllEdges(mesh.faces);// 创建并添加共享边if (allEdges.sharedEdges.length > 0) {const sharedEdgesMeshData: EdgeMeshData = {positions: allEdges.sharedEdges,groups: [],lineType: LineType.Solid,lineWidth: 0.5,color: 0x888888,};const buff = ThreeGeometryFactory.createEdgeBufferGeometry(sharedEdgesMeshData);const sharedEdgesMaterial = new LineMaterial({linewidth: sharedEdgesMeshData.lineWidth,color: 0xff0000,polygonOffset: true,polygonOffsetFactor: -3,polygonOffsetUnits: -3,});const sharedEdges = new LineSegments2(buff, sharedEdgesMaterial);this.add(sharedEdges);}}if (mesh?.edges?.positions.length) this.initEdges(mesh.edges);}