紧急求救：关于AcDbEntity派生类无法实现夹点问题

洪华发表于 2006-3-20 23:23:00

本人刚在学习ObjectARX,出现如下问题望各位看看: 1:在AcDbEntity派生类中定义了getGripPoints()函数,但在CAD中看不到夹点, 是何原因(下附原程序). 2:在worldDraw()函数中采用AcDbText *pText=new AcDbText()与 mode->geometry().text()定义实体有何区别. 类定义: class DLLIMPEXP dingteClass : public AcDbCurve { public:
 ACRX_DECLARE_MEMBERS(dingteClass);
 // Constructor / Destructor  dingteClass();  virtual ~dingteClass();
 //{{AFX_ARX_METHODS(dingteClass)  virtual Acad::ErrorStatus dxfOutFields(AcDbDxfFiler* pFiler) const;  virtual Acad::ErrorStatus dxfInFields(AcDbDxfFiler* pFiler);  virtual Acad::ErrorStatus dwgOutFields(AcDbDwgFiler* pFiler) const;  virtual Acad::ErrorStatus dwgInFields(AcDbDwgFiler* pFiler);  virtual Acad::ErrorStatus getStartPoint(AcGePoint3d& x0) const;  virtual Acad::ErrorStatus getEndPoint(AcGePoint3d& x0) const;  virtual Acad::ErrorStatus getGripPoints(AcGePoint3dArray& gripPoints,                                          AcDbIntArray& osnapModes,                                          AcDbIntArray& geomIds) const;  virtual Acad::ErrorStatus moveGripPointsAt(const AcDbIntArray& indices,                                             const AcGeVector3d& offset);    virtual Acad::ErrorStatus transformBy(const AcGeMatrix3d& xform);   virtual Adesk::Boolean worldDraw(AcGiWorldDraw* mode);  //}}AFX_ARX_METHODS
  //{{AFX_ARX_DATA_ACCESS(dingteClass)  Acad::ErrorStatus setEntPoint(const AcGePoint3d entPoint);  Acad::ErrorStatus entPoint(AcGePoint3d& entPoint);  Acad::ErrorStatus setStartPoint(const AcGePoint3d startPoint);  Acad::ErrorStatus startPoint(AcGePoint3d& startPoint);  //}}AFX_ARX_DATA_ACCESS
 private:  //{{AFX_ARX_DATA(dingteClass)  AcGePoint3d m_entPoint;  AcGePoint3d m_startPoint;  //}}AFX_ARX_DATA
 private:
 void *operator new[](unsigned nSize) { return 0; }  void operator delete[](void *p) {};  void *operator new[](unsigned nSize, const char *file, int line) { return 0; }
}; 类实现: Adesk::Boolean dingteClass::worldDraw(AcGiWorldDraw* mode) {  assertReadEnabled();  // TODO: implement this function.  //AcGePoint3d startPoint,entPoint;     //this->startPoint(startPoint);     //this->entPoint(entPoint);  //AcGeVector3d normal(0.0, 0.0, 1.0);  //AcGeVector3d direction=m_startPoint-m_entPoint;     //mode->geometry().text(m_startPoint,normal,direction,5,0.8,0,"toolTe");
 //AcGePoint3d *pVerts=new AcGePoint3d;     //pVerts=m_startPoint;     //pVerts=m_entPoint;  //mode->geometry().polyline(2,pVerts);
 AcDbText *pText=new AcDbText();  pText->setTextString("Hello");  pText->setPosition(m_startPoint);  pText->setHeight(5.0);  pText->worldDraw(mode);
 AcDbLine *line;  line=new AcDbLine(m_startPoint,m_entPoint);     line->worldDraw(mode);
 return AcDbEntity::worldDraw(mode); }
Acad::ErrorStatus dingteClass::startPoint(AcGePoint3d& startPoint) {  assertReadEnabled();  startPoint = m_startPoint;  return Acad::eOk; }
Acad::ErrorStatus dingteClass::setStartPoint(const AcGePoint3d startPoint) {  assertWriteEnabled();  m_startPoint = startPoint;  return Acad::eOk; }
Acad::ErrorStatus dingteClass::entPoint(AcGePoint3d& entPoint) {  assertReadEnabled();  entPoint = m_entPoint;  return Acad::eOk; }
Acad::ErrorStatus dingteClass::setEntPoint(const AcGePoint3d entPoint) {  assertWriteEnabled();  m_entPoint = entPoint;  return Acad::eOk; }
 Acad::ErrorStatus dingteClass::transformBy(const AcGeMatrix3d& xform) {  assertWriteEnabled();  // TODO: implement this function.  m_startPoint.transformBy(xform);  m_entPoint.transformBy(xform);
 return AcDbEntity::transformBy(xform); }
 Acad::ErrorStatus dingteClass::moveGripPointsAt(const AcDbIntArray& indices,                                                 const AcGeVector3d& offset) {  assertWriteEnabled();  // TODO: implement this function.
 dingteClass* te=new dingteClass();     AcGePoint3d entPoint,startPoint;  te->getEndPoint(entPoint);  te->getStartPoint(startPoint);  startPoint +=offset;  entPoint +=offset;  te->setEntPoint(entPoint);  te->setStartPoint(startPoint);  return AcDbEntity::moveGripPointsAt(indices, offset); }
Acad::ErrorStatus dingteClass::getGripPoints(AcGePoint3dArray& gripPoints,                                              AcDbIntArray& osnapModes,                                              AcDbIntArray& geomIds) const {  assertReadEnabled();  // TODO: implement this function.  AcGePoint3d entPoint,startPoint;  AcGeVector3d normal(0.0, 0.0, 1.0);     startPoint=m_startPoint;  entPoint=m_entPoint;  acdbEcs2Wcs(asDblArray(startPoint),   asDblArray(startPoint),asDblArray(normal),Adesk::kFalse);  acdbEcs2Wcs(asDblArray(entPoint),   asDblArray(entPoint),asDblArray(normal),Adesk::kFalse);  gripPoints.append(startPoint);  gripPoints.append(entPoint);  
 return AcDbEntity::getGripPoints(gripPoints, osnapModes, geomIds); }
Acad::ErrorStatus dingteClass::getEndPoint(AcGePoint3d& x0) const {  assertReadEnabled();  // TODO: implement this function.
 x0=m_entPoint;  return AcDbCurve::getEndPoint(x0); }
Acad::ErrorStatus dingteClass::getStartPoint(AcGePoint3d& x0) const {  assertReadEnabled();  // TODO: implement this function.  x0=m_startPoint;
 return AcDbCurve::getStartPoint(x0); }
Acad::ErrorStatus dingteClass::dwgInFields(AcDbDwgFiler* pFiler) {  assertWriteEnabled();  Acad::ErrorStatus es;
 // Call dwgInFields from AcDbCurve  if ((es = AcDbCurve::dwgInFields(pFiler)) != Acad::eOk) {   return es;  }
 // Read version number.  Adesk::UInt16 version;  pFiler->readItem(&version);  if (version > VERSION_DINGTECLASS)   return Acad::eMakeMeProxy;
 // Read the data members.  switch (version)  {  case (1):   pFiler->readItem(&m_startPoint);   pFiler->readItem(&m_entPoint);   // TODO: here you can file datamembers not   //       created by the ObjectARX Add-In.
  break;  }
  return pFiler->filerStatus(); }
Acad::ErrorStatus dingteClass::dwgOutFields(AcDbDwgFiler* pFiler) const {  assertReadEnabled();  Acad::ErrorStatus es;
 // Call dwgOutFields from AcDbCurve  if ((es = AcDbCurve::dwgOutFields(pFiler)) != Acad::eOk) {   return es;  }
 // Write version number.  pFiler->writeItem((Adesk::UInt16) VERSION_DINGTECLASS);
 // Write the data members.  pFiler->writeItem(m_startPoint);  pFiler->writeItem(m_entPoint);  // TODO: here you can file datamembers not  //       created by the ObjectARX Add-In.
  return pFiler->filerStatus(); }
Acad::ErrorStatus dingteClass::dxfInFields(AcDbDxfFiler* pFiler) {  assertWriteEnabled();  struct resbuf rb;
 if ((AcDbCurve::dxfInFields(pFiler) != Acad::eOk) ||      !pFiler->atSubclassData("dingteClass"))   return pFiler->filerStatus();
 // Read version number.  pFiler->readItem(&rb);  if (rb.restype != AcDb::kDxfInt16) {   pFiler->pushBackItem();   pFiler->setError(Acad::eInvalidDxfCode,                   "nError: expected object version group code %d",                    AcDb::kDxfInt16);   return pFiler->filerStatus();  } else {   Adesk::UInt16 version = rb.resval.rint;   if (version > VERSION_DINGTECLASS)    return Acad::eMakeMeProxy;  }
 pFiler->readItem(&rb);  if (rb.restype == AcDb::kDxfXCoord) {   m_startPoint = asPnt3d(rb.resval.rpoint);  } else {   pFiler->pushBackItem();   pFiler->setError(Acad::eInvalidDxfCode,                   "nError: expected group code %d",                   AcDb::kDxfXCoord);   return pFiler->filerStatus();  }
 pFiler->readItem(&rb);  if (rb.restype == AcDb::kDxfXCoord + 1) {   m_entPoint = asPnt3d(rb.resval.rpoint);  } else {   pFiler->pushBackItem();   pFiler->setError(Acad::eInvalidDxfCode,                   "nError: expected group code %d",                   AcDb::kDxfXCoord + 1);   return pFiler->filerStatus();  }
 // TODO: here you can file datamembers not  //       created by the ObjectARX Add-In.
 return pFiler->filerStatus(); }
Acad::ErrorStatus dingteClass::dxfOutFields(AcDbDxfFiler* pFiler) const {  assertReadEnabled();  Acad::ErrorStatus es;
 if ((es = AcDbCurve::dxfOutFields(pFiler)) != Acad::eOk)   return es;
 // Write subclass marker.  pFiler->writeItem(AcDb::kDxfSubclass, "dingteClass");
 // Write version number.  pFiler->writeItem(AcDb::kDxfInt16, (Adesk::UInt16) VERSION_DINGTECLASS);
 pFiler->writeItem(AcDb::kDxfXCoord, m_startPoint);  pFiler->writeItem(AcDb::kDxfXCoord + 1, m_entPoint);
 // TODO: here you can file datamembers not  //       created by the ObjectARX Add-In.
 return es; }

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紧急求救：关于AcDbEntity派生类无法实现夹点问题