[求助][ARX]如何根据鼠标在屏幕上面的移动轨迹画出它的相应CAD实体？

xiaomuyi

利用Arx进行二次开发的时候，如何根据鼠标在屏幕上面的移动轨迹画出它的相应CAD实体？请斑竹和各位高手赐教！谢谢！

badboy518

我试过了，这个可以。是转载别处的代码

//而且目前所有的参考书上对AcEdJig类的使用都是以拖动一个椭圆为例(作者都互相抄袭)
//因此我就想,把要生成的系列图形定义成一个自定义实体,不就可以使用AcEdJig了吗!

class  CMARectWindow : public AcDbEntity
{
public:

 ACRX_DECLARE_MEMBERS(CMARectWindow);

 CMARectWindow();
 virtual ~CMARectWindow();

 virtual Acad::ErrorStatus dwgOutFields(AcDbDwgFiler* pFiler) const;
 virtual Acad::ErrorStatus dwgInFields(AcDbDwgFiler* pFiler);
 virtual Adesk::Boolean worldDraw(AcGiWorldDraw* mode);

        //设置插入基点
 Acad::ErrorStatus setStartPt(const AcGePoint3d startPt);
        //取得插入基点
 AcGePoint3d startPt();

private:

        //成员变量，图形插入基点
        AcGePoint3d m_startPt;
};

 

///////////////CMARectWindow 类实现文件//////////////////

ACRX_DXF_DEFINE_MEMBERS(CMARectWindow, AcDbEntity,
                        AcDb::kDHL_CURRENT, AcDb::kMReleaseCurrent,
                        AcDbProxyEntity::kNoOperation,
                        CMAWINDO_INFO, PGL_02);

CMARectWindow::CMARectWindow()
{

 m_startPt.set(0.0, 0.0, 0.0);

}

CMARectWindow::~CMARectWindow()
{
 // TODO: clean up.

}

 

Adesk::Boolean CMARectWindow::worldDraw(AcGiWorldDraw* mode)
{
 assertReadEnabled();
 
 AcGePoint3d pt;  //插入点
 AcGePoint3d pt1, pt2, pt3, pt4;  //四个角点
 AcGeVector3d vec;
 AcGeVector3d normal(0.0, 0.0, 1.0);
 
 // 
 pt = startPt();
 
 //
 vec.set(0, 50, 0);
 pt1 = pt - vec;
 pt4 = pt + vec;
 
 vec.set(60, 0, 0);
 pt2 = pt1 + vec;
 pt3 = pt4 + vec;
 
 AcGePoint3d pLineArray[5]; 
 pLineArray[0] = pt1;
 pLineArray[1] = pt2;
 pLineArray[2] = pt3;
 pLineArray[3] = pt4;
 pLineArray[4] = pt1;
 
 //设置颜色为红色
 mode->subEntityTraits().setColor(1);
   
 //绘制矩形
 mode->geometry().polyline(5, pLineArray);
 
 //绘制圆
 mode->geometry().circle(pt, 30.0, normal);
 
 return AcDbEntity::worldDraw(mode);
 
}

Acad::ErrorStatus CMARectWindow::dwgInFields(AcDbDwgFiler* pFiler)
{
 assertWriteEnabled();
 
 Acad::ErrorStatus es; 
 if ((es = AcDbEntity::dwgInFields(pFiler)) != Acad::eOk)
 {
  return es;
 }
 
 pFiler->readItem(&m_startPt);
 
 return pFiler->filerStatus();
}

Acad::ErrorStatus CMARectWindow::dwgOutFields(AcDbDwgFiler* pFiler) const
{
 assertReadEnabled();
 
 Acad::ErrorStatus es;
 if ((es = AcDbEntity::dwgOutFields(pFiler)) != Acad::eOk)
 {
  return es;
 }
 
 pFiler->writeItem(m_startPt);
 
 return pFiler->filerStatus();
}

 
AcGePoint3d CMARectWindow::startPt()
{

 assertReadEnabled();
 return m_startPt;
}

Acad::ErrorStatus CMARectWindow::setStartPt(const AcGePoint3d startPt)
{

 assertWriteEnabled();
 m_startPt = startPt;
 return Acad::eOk;
}

 

/////////////////////////////////////////////
/////////////////////////////////////////////
/////////////////////////////////////////////
////////////拖动函数/////////////////////////

class pglyxqLine : public AcEdJig 
{
public:
    pglyxqLine();
    void doIt();
    virtual DragStatus sampler();
    virtual Adesk::Boolean update();
    virtual AcDbEntity* entity() const;

private:
    CMARectWindow *pRectWindow;

    AcGePoint3d ptm, movePt;
};

///////////////构造函数//////////////////////////////////////

pglyxqLine::pglyxqLine()
{
   //
   //
}

///////////////拖动图形/////////////////////////////////////

void
pglyxqLine::doIt()
{
    pRectWindow = new CMARectWindow;
    if(!pRectWindow)
    {
      acutPrintf("****CMARectWindow对象不存在****");
      return;
    }
    setDispPrompt("\n指定位置: ");
    AcEdJig::DragStatus stat = drag();

    append();
}

 

//////////////捕获定点设备并作出分析////////////////////////

AcEdJig::DragStatus
pglyxqLine::sampler()
{
    DragStatus stat;

    static AcGePoint3d tempPoint;

    stat = acquirePoint(movePt);

    if (tempPoint != movePt)
        tempPoint = movePt;
    else if (stat == AcEdJig::kNormal)
        return AcEdJig::kNoChange;
   
    return stat;
}

 

/////////更新数据///////并更新类成员变量的值/////////////////

Adesk::Boolean
pglyxqLine::update()
{
    ptm = movePt;

    pRectWindow->setStartPt(ptm);

    return Adesk::kTrue;
}

 

//////////////////更新实体///////////////////////////////////

AcDbEntity*
pglyxqLine::entity() const
{
    return pRectWindow;
}

 

////////////命令执行函数//////////////////////////////////////////////

void
create_tuxing()
{
   
    //初始化一个拖动派生类实体
    pglyxqLine *pJig = new pglyxqLine();
    //拖动实体
    pJig->doIt();

    delete pJig;
}

void
initApp()
{
    acedRegCmds->addCommand("PGL_YXQ", "PGLYXQ", "PGLYXQ", ACRX_CMD_MODAL, create_tuxing);

    //自定义类初始化函数
    CMARectWindow::rxInit();
    acrxBuildClassHierarchy();

}

void
unloadApp()
{
    acedRegCmds->removeGroup("PGL_YXQ");

    deleteAcRxClass(CMARectWindow::desc());
}

 

extern "C" AcRx::AppRetCode
acrxEntryPoint(AcRx::AppMsgCode msg, void* appId)
{
    switch (msg)
   {
    case AcRx::kInitAppMsg:
        acrxDynamicLinker->unlockApplication(appId);
 acrxDynamicLinker->registerAppMDIAware(appId);
        initApp();
        break;
    case AcRx::kUnloadAppMsg:
        unloadApp();
    }
    return AcRx::kRetOK;
}

xiaomuyi

谢谢badboy518朋友的答案。正在认真学习中。。。