复杂的实体。

#include "StdAfx.h"
#include "JigTest.h"
RectJig::RectJig(double width, double height, const CString &msg, Adesk::Boolean append /*= Adesk::kTrue*/)
:m_append(append), m_line(new AcDbPolyline(4)), m_cur(AcGePoint3d::kOrigin), 
m_last(AcGePoint3d::kOrigin) , m_msg(msg) , m_id(AcDbObjectId::kNull)
{
  AcGePoint2d pt0(m_cur.x, m_cur.y);
  AcGePoint2d pt1(pt0.x + width,pt0.y);
  AcGePoint2d pt2(pt0.x + width, pt0.y + height);
  AcGePoint2d pt3(pt0.x, pt0.y + height);
  this->m_line->addVertexAt(0,pt0);
  this->m_line->addVertexAt(1,pt1);
  this->m_line->addVertexAt(2,pt2);
  this->m_line->addVertexAt(3,pt3);
  this->m_line->setClosed(Adesk::kTrue);
}
RectJig::~RectJig(void)
{
  if(!m_append)
  {
    delete m_line;
  }
}
inline Adesk::Boolean RectJig::cursorHasMoved( void )
{
  return this->m_cur != this->m_last;
}
AcEdJig::DragStatus RectJig::sampler()
{
  setUserInputControls(UserInputControls(kAccept3dCoordinates));
  if(acquirePoint(m_cur) != AcEdJig::kNormal)
  {
    return AcEdJig::kCancel;
  }
  if(this->cursorHasMoved())
  {
    return AcEdJig::kNormal;
  }
  return AcEdJig::kNoChange;
}
Adesk::Boolean RectJig::update(void)
{
  if(this->m_line->transformBy(AcGeMatrix3d::translation(AcGeVector3d(m_cur - m_last))) != Acad::eOk)
  {
    return Adesk::kFalse;
  }
  m_last = m_cur;
  return Adesk::kTrue;
}
AcDbEntity* RectJig::entity(void) const
{
  return this->m_line;
}
void RectJig::doIt(void)
{
  setDispPrompt(m_msg);
  if(drag() != AcEdJig::kNormal)
  {
    m_append = Adesk::kFalse;
  }
  if(m_append)
  {
    m_id = append();
    m_line->close();
  }
}
AcGePoint2d RectJig::getPoint2d(void) const
{
  return AcGePoint2d(m_last.x, m_last.y);
}
AcGePoint3d RectJig::getPoint3d(void) const
{
  return m_last;
}
AcDbObjectId RectJig::getObjectId( void ) const
{
  return m_id;
}

 static void CabDraw_RectJig(void)
  {
    RectJig jig(100,100, _T("Pick Start Point: "));
    jig.doIt();
    acutPrintf(_T("\n%g,%g"),jig.Point2d.x, jig.Point2d.y);
  }