[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 发表于 2006-2-28 00:13:00

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 发表于 2006-3-2 19:59:00

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;   pLineArray = pt1;  pLineArray = pt2;  pLineArray = pt3;  pLineArray = pt4;  pLineArray = 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 发表于 2006-3-2 22:07:00

谢谢<A name=1099>badboy518</A>朋友的答案。正在认真学习中。。。

pglyxq 发表于 2006-3-2 22:10:00

pglyxq 发表于 2006-3-3 08:28:00

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[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？