envi-code/SourceCode/Code2026/tg_shs/shs_geLib/TGGePoly.cpp

//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGGePoly Àà
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGGePoly ¶¨Òå
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#include "StdAfx.h"
#include "TGGePoly.h"
#include "TGGeLine.h"

#include "TGGeShape.h"
#include "TGGeTrianglePface.h"
#include "TchGlobalFunc.h"
#include "TGGePolygonEx.h"
#include "TchGlobalCurveFunc.h"
#include "TGGeCurveInline.h"

TGGePoly::TGGePoly()
{
}

TGGePoly::TGGePoly(resbuf *pts)
{
	TGroups *ptList = (TGroups *)pts;
	for (TGroups *pt = ptList; pt != NULL; pt = pt->next)
	{
		if (pt->type != RT3DPOINT && pt->type != RTPOINT)
		{
			Reset();
			return;
		} 
		else 
		{
			Point tmp = pt->point;
			tmp.z = 0.0;
			Append(new TADSGePoint3d(tmp));
		}
	}
}

TGGePoly::TGGePoly(const TEntitySet &ent)
{
	TEntitySet entPLine = ent;
	TADSGePoint3d pt;
	if (entPLine.Is(_T("POLYLINE")))
	{
		TEntitySet subEnt = entPLine;
		while (TRUE)
		{
			TEntitySet sub_ent;
			if (ads_entnext(subEnt, sub_ent) != RTNORM)
			{
				break;
			}
			
			subEnt = sub_ent;
			subEnt.FreeGroups();
			if (subEnt.Is(_T("SEQEND")))
			{
				break;
			}
			
			int nflg = 0;
			if (subEnt.GetData(70, &nflg) == RTNORM && nflg == 128)
			{
				break;
			}
			
			subEnt.GetData(10, pt);
			Append(new TADSGePoint3d(pt));
		}
	}
	else if (entPLine.Is(_T("LWPOLYLINE")))
	{
		ads_real dElevation = 0.0;
		entPLine.GetData(38, &dElevation);
		
		resbuf *ebuf = entPLine;
		while(ebuf)
		{ 
			resbuf *rb1 = GetResbufAtCode(ebuf, 10);
			if (rb1)
			{
				pt = rb1->resval.rpoint;
				pt.z = dElevation;
				Append(new TADSGePoint3d(pt));
				ebuf = rb1->rbnext;
			}
			else
			{
				break;
			}
		} 
	}
}

TGGePoly::TGGePoly(const TGGePoly &src) 
{
	*this = src;
}

TGGePoly::~TGGePoly()
{

}

void TGGePoly::CopyFrom(const TGGeEntity* pSrc)
{
	if (this != pSrc && pSrc->IsKindOf(TGGeEntity::ePoly2D))
	{
		copyFrom(*((TGGePoly* )pSrc));
	}
}

void TGGePoly::Center(ads_point ptcen)
{
	Center(ptcen);
}

int TGGePoly::IsRectAngle(ads_point ptcen, ads_real *pdwidth, ads_real *pdheight)
{
	if (Length() != 4)
	{
		return 0;
	}

	TGGeLine line[4];
	for (int i = 0; i < 4; i++)
	{
		NthLine(i, line[i]);
	}

	if (IsOrthDrt(line[0].Direction(), line[1].Direction(), _angSnap)
		 && IsOrthDrt(line[2].Direction(), line[3].Direction(), _angSnap)
		 && IsSameDrt(line[0].Direction(), line[2].Direction(), _angSnap))
	{
		if (RealEqual(line[0].GetLength(),line[2].GetLength(),_DIST_SNAP) &&
			RealEqual(line[1].GetLength(), line[3].GetLength(),_DIST_SNAP))
		{
			if (IsSameDrt(line[0].Direction(), 0, _angSnap))
			{
				TGGeLine ln(*(*this)[0], *(*this)[2]);
				if (ptcen)
				{
					*(TADSGePoint3d*)ptcen = ln.MidPoint();
				}

				if (pdwidth)
				{
					*pdwidth = line[0].GetLength();
				}

				if (pdheight)
				{
					*pdheight = line[1].GetLength();
				}

				return 1;
			}
			else if (IsSameDrt(line[1].Direction(), 0, _angSnap))
			{
				TGGeLine ln(*(*this)[0], *(*this)[2]);
				if (ptcen)
				{
					*(TADSGePoint3d*)ptcen = ln.MidPoint();
				}

				if (pdwidth)
				{
					*pdwidth = line[1].GetLength();
				}

				if (pdheight)
				{
					*pdheight = line[0].GetLength();
				}

				return 1;
			}
		}
	}

	return 0;
}

int TGGePoly::NthLine(int nIndex, TGGeLine& res)
{
	int nlen = Length();
	if (nIndex >= nlen || nIndex < 0)
	{
		return RTERROR;
	}

	TADSGePoint3d *pt1 = (*this)[nIndex];
	TADSGePoint3d *pt2;
	if (nIndex == nlen - 1)
	{
		pt2 = (*this)[0];
	}
	else
	{
		pt2 = (*this)[nIndex + 1];
	}

	if (!pt1 || !pt2)
	{
		return RTERROR;
	}
	res.SetPoints(*pt1, *pt2);

	return RTNORM;
}

ads_real TGGePoly::PathArea()
{
	TGGeLine line;
	ads_real dresult = 0.0;
	
	int nsegments = Length();
	for (int i = 0; i < nsegments; i++)
	{
		if (NthLine(i, line) != RTNORM)
		{
			break;
		}

		dresult += line.PathArea();
	}

	return dresult;
}

int TGGePoly::IsPoint()
{
	int nlen = Length();
	if (!nlen)
	{
		return 0;
	}

	TADSGePoint3d bp = *(*this)[0];
	for (int i = 0; i < nlen; i++)
	{
		if (!(bp == *(*this)[i]))
		{
			return 0;
		}
	}
	
	return 1;
}

int TGGePoly::IsLinear()
{
	TGGeLine xline;
	int i = 0;
	while(1)
	{
		if (NthLine(i, xline) != RTNORM)
		{
			return 0;
		}
	
		if (xline.GetLength() > _DIST_SNAP)
		{
			break;
		}
		
		i++;
	}

	int nlen = Length();
	for (i = 0; i < nlen; i++)
	{
		TADSGePoint3d &pt = *(*this)[i];
		if ((pt & xline) == PR_OUTSIDE)
		{
			return 0;
		}
	}
	
	return 1;
}


resbuf* TGGePoly::Polygon()
{
	return ResbufList(0);
}

resbuf* TGGePoly::Fence()
{
	return ResbufList(1);
}

resbuf* TGGePoly::ResbufList(int nIsClosed)
{
	int nlen = Length();
	if (nIsClosed)
	{
		nlen++;
	}
	
	TGroups *lastrb = NULL, *result = NULL;
	for (int i = 0; i < nlen; i++)
	{
		int ncur;
		if (nIsClosed && i == nlen - 1)
		{
			ncur = 0;
		}
		else
		{
			ncur = i;
		}
	
		TGroups *rb = new TGroups(*(*this)[ncur]);
		rb->next = NULL;
		if (lastrb)
		{
			lastrb->next = rb;
			lastrb = rb;
		}
		else
		{
			lastrb = result = rb;
		}
	}

	return (resbuf *)result;
}

ads_real TGGePoly::Area()
{
	return fabs(PathArea());
}

ShapeType TGGePoly::GetShapeType() const
{
	return SHAPE_POLY;
}

TGGePoly& TGGePoly::operator = (const TGGePoly &src)
{
	(TADSGePointList &)*this = src;
	return *this;
	//Reset();
	//if (this != &src)
	//{
	//	CopyFrom(&src);	
	//}
	//return *this;
}

int TGGePoly::operator !()
{
	return (Length() < 3 ? 1 : 0);
}

int TGGePoly::CreatePface(const TCHAR *szlay/* = NULL*/)
{
	TGGePolygonEx polyEx(*this);
	TGGeTrianglePface lstTris;
	
	if (polyEx.Trianglize(lstTris, TRUE) == RTNORM)
	{
		return lstTris.MakePolyface(szlay);
	}
	return RTERROR;
}

int TGGePoly::GetExtend(TADSGePoint3d &ptlow, TADSGePoint3d &ptup) const
{
	return TADSGePointList::GetExtend(ptlow, ptup);
}

bool TGGePoly::IsKindOf(TGGeEntity::TEntityId entType) const
{
	switch(entType)
	{
	case TGGeEntity::eEntity:
	case TGGeEntity::eCurve:
	case TGGeEntity::eShape:
	case TGGeEntity::ePoly:
		return true;
	}
	return false;
}

TGGeEntity::TEntityId TGGePoly::Type() const
{
	return TGGeEntity::ePoly;
}