public bool Contains(GePoint point)
{
if (null == point) return false;
GeLine Line = new GeLine(m_StartPoint, m_EndPoint);
if (null == Line) return false;
GePoint ClosestPoint = Line.ClosestPointTo(point);
if (null == ClosestPoint || !ClosestPoint.IsEqualTo(point))
return false;
Vector C2S = new Vector(ClosestPoint, m_StartPoint);
Vector C2E = new Vector(ClosestPoint, m_EndPoint);
double angle = C2S.AngleTo(C2E);
//bool bRet = C2S.AngleTo(C2E);
if ( MathUtil.IsTwoDoubleEqual(angle
, MathUtil.PI))
{
return true;
}
return false;
}
public GeLineSeg(GePoint sp, GePoint ep)
{
if (sp != null)
m_StartPoint = (GePoint)sp.Clone();
else
m_StartPoint = GePoint.kOrigin;
if (ep != null && !m_StartPoint.IsEqualTo(ep))
m_EndPoint = (GePoint)ep.Clone();
else
m_EndPoint = m_StartPoint + UnitVector.kXAxis.Vector;
}
public GePoint ClosestPointTo(GePoint point)
{
if (null == point) return null;
GeLine Line = new GeLine(m_StartPoint, m_EndPoint);
GePoint ClosePoint = Line.ClosestPointTo(point);
if(Contains(ClosePoint))
{
return ClosePoint;
}
else
{
double P2S = point.DistanceTo(m_StartPoint);
double P2E = point.DistanceTo(m_EndPoint);
if (P2S < P2E)
return (GePoint)m_StartPoint.Clone();
else
return (GePoint)m_EndPoint.Clone();
}
}
