/**--------------------------------------------------------------------------<BR>
C2DLine::Distance
\brief Returns the distance from this to the point.
<P>---------------------------------------------------------------------------*/
double C2DLine::Distance(const C2DPoint& TestPoint, C2DPoint* ptOnThis) const
{
C2DVector vP1ToPoint(point, TestPoint);
double dLength = GetLength();
double dProjLength = vP1ToPoint.Dot(vector);
if (dProjLength < 0)
{
if (ptOnThis != 0)
*ptOnThis = point;
return TestPoint.Distance(point);
}
else
{
dProjLength = dProjLength / dLength;
if (dProjLength < dLength)
{
// The projection is on the line
double dFactorOnLine = dProjLength / dLength;
C2DPoint PtOnLine(point.x + vector.i * dFactorOnLine,
point.y + vector.j * dFactorOnLine);
if (ptOnThis != 0)
*ptOnThis = PtOnLine;
return TestPoint.Distance(PtOnLine);
}
else
{
if (ptOnThis != 0)
*ptOnThis = GetPointTo();
return TestPoint.Distance( GetPointTo() );
}
}
}
/**--------------------------------------------------------------------------<BR>
C2DLine::DistanceAsRay
\brief Returns the distance from this to the point with this as a ray.
<P>---------------------------------------------------------------------------*/
double C2DLine::DistanceAsRay(const C2DPoint& TestPoint, C2DPoint* ptOnThis) const
{
C2DVector vP1ToPoint(point, TestPoint);
// The projection is on the line
double dFactorOnLine = vP1ToPoint.Dot(vector) / (vector.i * vector.i + vector.j * vector.j);
C2DPoint PtOnLine(point.x + vector.i * dFactorOnLine,
point.y + vector.j * dFactorOnLine);
if (ptOnThis != 0)
*ptOnThis = PtOnLine;
return TestPoint.Distance(PtOnLine);
}
//new
//需要增加一个标志参数，判断是在comview中，还是modelview中
STDMETHODIMP CMyCom1::PtInRgn(unsigned long point, unsigned long return_flag)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState())
// TODO: Add your implementation code here
BOOL flag = FALSE;
if ( m_scale_flag )
{
flag = upRgn.PtInRegion(*(CPoint*)point);
if ( flag )
{
*(BOOL *)return_flag = TRUE;
return S_OK;
}
flag = PtOnLine(*(CPoint*)point, topPoint, bottomPoint);
if ( flag )
{
*(BOOL *)return_flag = TRUE;
return S_OK;
}
flag = PtOnLine(*(CPoint*)point, leftPoint, rightPoint);
if ( flag )
{
*(BOOL *)return_flag = TRUE;
return S_OK;
}
}
flag = downRgn.PtInRegion(*(CPoint*)point);
if ( flag )
*(BOOL *)return_flag = TRUE;
else
*(BOOL *)return_flag = FALSE;
return S_OK;
}
