ObjectArx-C++实现 坡度编辑命令-指定基点的情况下提示用户拾取另一个点

C++实现坡度编辑命令,指定基点的情况下提示用户拾取一个点。

主要思路是:

  1. 先画一个坡度块。
  2. 绘制参考线,参考线能够进行极轴跟踪。
  3. 坡度编辑,选中坡度块,画出参考线,根据参考线延伸坡度长度。

图例如下:

ObjectArx-C++实现 坡度编辑命令-指定基点的情况下提示用户拾取另一个点

示例如下:

  1. 程序入口点代码

    ```c++
    //zhaoanan 坡度绘制
    // - zndraw_thslope command (do not rename)
    //自定义实体绘制坡度
    static void zndraw_thslope(void)
    {
    AcDbDatabase m_pDb = acdbHostApplicationServices()->workingDatabase();
    //添加块定义
    acutPrintf(_T("\n坡度绘制")) ;
    CUserSystem
    mysys = new CUserSystem();
    mysys->m_pDb = m_pDb;
    //声明左边插入点
    ads_point pt_insert;
    AcGePoint3d pt_3d_insert;
    int iOldOsMode = 0 ;
    BOOL bReturn = false ;
    while (bReturn == false)
    {
    int iReturn = acedGetPoint(NULL,_T("\n 指定坡度的插入点:"),pt_insert) ;
    //int iReturn = acedEntSel(_T("\n选择实体对象"), en, pt) ;

    if(iReturn == RTNORM)
    {       
        bReturn = true ;
    
        pt_3d_insert =asPnt3d(pt_insert);
    
        acutPrintf(_T("\n坡度插入点坐标:x坐标为:%f,y坐标为:%f"), pt_3d_insert.x, pt_3d_insert.y);
        //实例化轨道坡度对象
        CthRailSlope *cthRailSlope = new CthRailSlope();
        //指定坡度位置为插入点坐标
        cthRailSlope->setPosition(pt_3d_insert);
        //添加坡度组件
        CthComponent *lineCp = new CthComponent();
        //thComponent c = new thComponent();
        //根据插入点,画坡度上面的横线
        lineCp->addLine(AcGePoint3d(-26, 7.5, 0), AcGePoint3d(0, 7.5, 0));
        //根据插入点,画坡度下面的横线
        lineCp->addLine(AcGePoint3d(-26, -7.5, 0), AcGePoint3d(0, -7.5, 0));
        //以插入点横坐标X=-26为基准向上和向下画竖线
        lineCp->addLine(AcGePoint3d(-26, 7.5, 0), AcGePoint3d(-26, -7.5, 0));
        //添加坡度框体中间的文字
        CthText *text = lineCp->addText(_T("坡"), AcGeVector3d(-23, 2.5, 0), 3);
        //指定字体对齐方式
        text->setAlign(AcDbMText::kMiddleCenter);
        text = lineCp->addText(_T("度"), AcGeVector3d(-23, -2.5, 0), 3);
        //指定字体对齐方式
        text->setAlign(AcDbMText::kMiddleCenter);
        //以插入点横坐标X=-20为基准向上和向下画竖线
        lineCp->addLine(AcGePoint3d(-20, 7.5, 0), AcGePoint3d(-20, -7.5, 0));
        //将新建的组件添加到坡度对象
        cthRailSlope->appendComponent(lineCp);
        lineCp = new CthComponent();
        //type=1, 没查到代表什么
        lineCp->setType(1);
        //根据插入点,以插入点为基准向上和向下画竖线
        lineCp->addLine(AcGePoint3d(pt_3d_insert.x, pt_3d_insert.y + 7.5, 0), AcGePoint3d(pt_3d_insert.x, pt_3d_insert.y - 7.5, 0));
        //给新加的竖线添加文字
        text = lineCp->addText(_T(""), AcGeVector3d(pt_3d_insert.x, pt_3d_insert.y, 0), 2.5);
        text->setName(_T("里程"));
        //指定字体旋转角度
        text->setRotation(PI / 2);
        //指定字体对齐方式
        text->setAlign(AcDbMText::kBottomCenter);
        //将新建的组件添加到坡度对象
        cthRailSlope->appendComponent(lineCp);
        //获取devices.xml中的图层信息,给新建坡度对象添加图层
        DTDevice* device = CZnUtility::GetDevice(cthRailSlope);
        //如果获取的devices.xml中的坡度相关图层信息不为空
        if(device != nullptr && (!device->GetLayer().IsEmpty()))
        {
            //将图层信息添加到图层表中
            if (addLayer(device))
            {
                //如果图层信息添加到图层表成功,那么将图层信息赋值给当前坡度图层
                cthRailSlope->setLayer(device->GetLayer());
            }
        }
    
        //将里程实体加入到块表记录中
        //cthRailSlope->AddRailSlope("ZDK1+222.45", "ZDK2+123.11", "20", 20.00, "30", cthRailSlope->position().x + 20, cthRailSlope->position().x + 50, 1);
        AcDbObjectId dimensionId = CDwgDatabaseUtil::PostToModelSpace(cthRailSlope, m_pDb);
    }
    else if (iReturn == RTERROR) 
    {
        bReturn = false ;
    }   
    else if (iReturn == RTCAN) {
        bReturn = true ;
    }

    }
    //保存当前图层,设置要绘制的图层
    AcDbObjectId ojbIdLayerOld = m_pDb->clayer() ;

    m_pDb->setClayer(ojbIdLayerOld) ; //恢复当前图层
    }

  2. 拖拽程序代码,要有坡度编辑的时候有参照线,指定基点的情况下提示用户拾取一个点,代码实现:

    ```c++
    //刷新窗口 当即生效
    int CGetInputUtil::GetPointReturnCode(const AcGePoint3d &basePoint, const TCHAR* prompt, AcGePoint3d &point)
    {
    //将基点转换为UCS坐标
    AcGePoint3d ucsBasePoint = CConvertUtil::WcsToUcsPoint(basePoint);

    int nReturn = acedGetPoint(asDblArray(ucsBasePoint), prompt, asDblArray(point));

    if (nReturn == RTNORM)
    {
    //acedGetPoint得到UCS坐标,转换为WCS
    point = CConvertUtil::UcsToWcsPoint(point);
    }

    return nReturn;
    }

  3. 坡度编辑代码

    ```c++
    //zhaoanan 坡度编辑
    // - zndraw_thslope command (do not rename)
    //自定义实体坡度编辑
    static void zndraw_thslopeedit(void)
    {
    AcDbDatabase m_pDb = acdbHostApplicationServices()->workingDatabase();
    //添加块定义
    acutPrintf(_T("\n坡度编辑")) ;
    CUserSystem
    mysys = new CUserSystem();
    mysys->m_pDb = m_pDb;

    //声明左边插入点
    ads_name en ;
    ads_point pt ;
    BOOL bReturn = false ;
    while (bReturn == false)
    {
    int iReturn = acedEntSel(_T("\n选择坡度实体对象"), en, pt) ;

    if(iReturn == RTNORM)
    {       
        bReturn = true ;
    
        AcDbEntity * pEnt = NULL ;
        CthRailSlope * pthEnt = NULL;
        if(mysys->OpenAcDbEntity(en, pEnt, AcDb::kForRead))
        {
            acedUpdateDisplay();
            //指定坡度端点
            if(pEnt->isKindOf(CthRailSlope::desc()))
            {
                pthEnt = CthRailSlope::cast(pEnt) ;
                pthEnt->upgradeOpen();
                //获取里程值
                CthComponent *pCpnt = pthEnt->getComponent(pthEnt->getComponentCount() - 1);
                CthLine* line= (CthLine*)pCpnt->getElement(0);
                AcGePoint3d pt_3d_base(line->startPoint().x, pthEnt->position().y, 0);
                // 左里程
                CString m_left_kmpost = "";
                //进行非空判断,可能为空,没有添加过左公里标时为空
                if (pCpnt != NULL) {
                    CthElement *pElm = pCpnt->getElement(_T("里程"));
                    if (pElm->type() == 32)
                    {
                        CthText* pText = (CthText*)pElm;
                        //更新里程值内容
                        m_left_kmpost = pText->textString();
                    }
                }
                //acutPrintf(_T("\n坡度基准点坐标:x坐标为:%f,y坐标为:%f"), pt_3d_base.x, pt_3d_base.y);
                //画出虚拟参考线
                //声明极轴追踪模式
                int iOldPolarMode = 0;
                //得到原极轴追踪模式
                mysys->GetSysVar(_T("AUTOSNAP"), iOldPolarMode);
                //设置极轴追踪模式,0为不极轴追踪,8为极轴追踪
                mysys->SetSysVar(_T("AUTOSNAP"), 8) ;
                CRailSlopeEditJig *pJig = new CRailSlopeEditJig();
                pJig->DoIt(pt_3d_base);
                //恢复原极轴追踪模式
                mysys->SetSysVar(_T("AUTOSNAP"), iOldPolarMode) ;
                int len = pJig->m_3dPoints.length();
                //打开窗体
                if (len>=2)
                {
                    CAcModuleResourceOverride myResources ; 
                    RailSlopeEditDlg dlg = new RailSlopeEditDlg();
                    //值的初始化
                    dlg.cthRailSlope = pthEnt;
                    dlg.m_left_kmpost = m_left_kmpost;
                    dlg.m_pt3dBasePoint = pthEnt->position();
                    dlg.m_pt3dStartPoint = pJig->m_pt3dStart;
                    dlg.m_pt3dEndPoint = pJig->m_pt3dEnd;
                    int nRet = dlg.DoModal();
                    if (nRet == IDOK)
                    {
                        acutPrintf(_T("\n坡度编辑完成")) ;
                    } else if (nRet == IDCANCEL) {
                        acutPrintf(_T("\n坡度编辑已取消")) ;
                    }
                }
                //获取名称
                pthEnt->downgradeOpen();
            }
            else
            {
                AfxMessageBox(_T("选择的不是坡度实体!")) ;
                bReturn = false ;
            }
            if(pEnt!=NULL)
            {
                pEnt->unhighlight() ;
                pEnt->close();
            }
            acedUpdateDisplay();
    
        }
        //AcDbObjectId dimensionId = CDwgDatabaseUtil::PostToModelSpace(cthRailSlope, m_pDb);
    }
    else if (iReturn == RTERROR) 
    {
        bReturn = false ;
    }   
    else if (iReturn == RTCAN) {
        bReturn = true ;
    }

    }
    //保存当前图层,设置要绘制的图层
    AcDbObjectId ojbIdLayerOld = m_pDb->clayer() ;

    m_pDb->setClayer(ojbIdLayerOld) ; //恢复当前图层
    }

  4. 参考意见和网页地址:

    1. https://blog.csdn.net/qq_40416052/article/details/82077497
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