ObjectARX2010 学习笔记004：复制多段线点生成新多段线

static void swtArxProject5plcopy(void)
    {
        // Add your code for command swtArxProject5.plcopy here
        //定义对象名和点
        ads_name ename;ads_point pt;
        //如果没有选择到实体
        if(acedEntSel(NULL,ename,pt)!=RTNORM)
        {
            return;
        }
        //定义并获取ID
        AcDbObjectId id;
        acdbGetObjectId(id,ename);
        //定义并获取实体
        AcDbEntity *pEnt;
        acdbOpenObject(pEnt,id,AcDb::kForRead);
        //定义点集
        AcGePoint2dArray pts;
        //判断是否是多段线
        if(pEnt->isKindOf(AcDbPolyline::desc()))
        {
            //如果是，定义多段线
            AcDbPolyline *pPline=AcDbPolyline::cast(pEnt);
            //点数量
            int num=pPline->numVerts();
            //在点中循环
            for (int i=0;i<num;i++)
            {
                AcGePoint2d pt;
                //取得每个点
                pPline->getPointAt(i,pt);
                //将点加入到点集
                pts.append(pt);
            } 
            pPline->close();
        }
        //关闭实体
        pEnt->close();
        //创建多段线
        CreatePolyline(pts,1.0);
    }

AcDbObjectId CreatePolyline(AcGePoint2dArray pts,double width)
{
	int numVertex =pts.length();
	AcDbPolyline *pPoly=new AcDbPolyline(numVertex);
	for (int i=0;i<numVertex;i++)
	{
		pPoly->addVertexAt(i,pts.at(i),0,width,width);
	}
	AcDbObjectId polyId;
	pPoly->setColorIndex(1);
	polyId=PostToModelSpace(pPoly);
	pPoly->close();
	return polyId;
}