[ObjectARX]-创建多边形网格

完整的实现代码：

static void AAAMyGroupMyCommand () {
		// Put your command code here

		acutPrintf(_T("\\nHello World!"));

		//创建一个简单的多边形网格
		AcGePoint3dArray ptArr;
		ptArr.setLogicalLength(8);
		for (int i = 0; i < 8; i++) //在X-Y平面上产生8个点
		{
			ptArr[i].set((double)(i / 2), (double)(i % 2), 0.0);

		}

		//默认构造函数。构造一个带有线型生成off的开放折线，并初始化开始和结束宽度到0.0，凸起到0.0，仰角到0.0，类型到AcDb::k2dSimplePoly，法线到(0,0,1)，厚度到0.0。
		AcDb2dPolyline *pNewPline = new AcDb2dPolyline(AcDb::k2dSimplePoly, ptArr, 0.0, Adesk::kTrue);
		pNewPline->setColorIndex(100);

		//没有任何参数的多边形网格构造函数
		AcDbPolygonMesh *pMesh = new AcDbPolygonMesh();
		pMesh->setMSize(2);  //设置多边形在M方向上的顶点数为2
		pMesh->setNSize(8);  //设置多边形在N方向上的顶点数为8
		pMesh->makeMClosed();  //这个函数设置多边形在M方向上闭合。
		pMesh->makeNClosed();  //这个函数设置多边形在N方向上闭合。

		AcDbVoidPtrArray arr;
		arr.append(pMesh);

		//获得指向块表的指针
		AcDbBlockTable *pBlockTable;
		acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);

		//获得指向块表记录(模型空间)的指针
		AcDbBlockTableRecord *pBlockTableRecord;
		pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
		pBlockTable->close();

		AcDbObjectId plineObjId;
		//将pNewPline添加到数据库和块表记录中。如果操作成功，则将plineObjId设置为新添加实体的AcDbObjectId。
		pBlockTableRecord->appendAcDbEntity(plineObjId, pNewPline);

		AcDbObjectIterator *pVertIter = pNewPline->vertexIterator();//创建一个新的AcDbObjectIterator集，用于在折线的顶点上迭代
		AcDb2dVertex *pVertex;
		AcGePoint3d location;
		AcDbObjectId vertexObjId;
		for (int vertexNumber = 0; !pVertIter->done(); vertexNumber++, pVertIter->step())
		{
			vertexObjId = pVertIter->objectId();
			acdbOpenObject(pVertex, vertexObjId, AcDb::kForRead);//指向打开对象的输出指针pVertex,输入要打开对象的对象ID:vertexObjId
			location = pVertex->position();
			pVertex->close();

			//AcDbPolygonMeshVertex类表示AutoCAD中多边形网格内的顶点。
			AcDbPolygonMeshVertex* polyVertex = new AcDbPolygonMeshVertex(pVertex->position());
			pMesh->appendVertex(polyVertex);
			polyVertex->close();
		}
		delete pVertIter;

		pBlockTableRecord->appendAcDbEntity(pMesh);
		pBlockTableRecord->close();
		pNewPline->close();
		pMesh->close();

		acutPrintf(_T("\\nHello World2!"));
	}

效果：

参考文献：

Creating a simple Polygon Mesh