polygon.cpp

我自己写的代码 可能比较简单 我实现了模拟图层的功能

///////////////////////////////////////////////////////////
//  Polygon.cpp
//  Implementation of the Class Polygon
//  Created on:      18-二月-2009 17:17:22
//  Original author: pangyj
///////////////////////////////////////////////////////////
#include "StdAfx.h"

#include "Polygon.h"
#include "Layer.h"
#include "Line2D.h"
Polygon::~Polygon(){

}

Polygon::Polygon(const lit_list<Point2D> & vertexPts):GeometryPrimitive(){

}


Polygon::Polygon():GeometryPrimitive(){

}


const lit_list<Point2D> & Polygon::AddvertexAt(int pos, Point2D& pt){

	return  lVertexPts;
}


ErrorStatus Polygon::read(fstream& f){

	return  eOk;
}


ErrorStatus Polygon::vertexPts(lit_list<Point2D> & pts){

	return  eOk;
}


ErrorStatus Polygon::write(fstream& f){

	return  eOk;
}
void Polygon::list()const
{
	cout<<"========================="<<endl;
	cout <<"type = Polygon ";
	GeometryPrimitive::list();
	EntityObject::list();
	lit_node<Point2D> *pCurNode = lVertexPts.get_head();
	int i = 0;
	cout<< "vertex pts = " << lVertexPts.count()<<endl;
	while (pCurNode)
	{
		cout<<i<<"  ("<<pCurNode->get_value().x<<","<<pCurNode->get_value().y<<")"<<endl;
		++i;
		pCurNode = pCurNode->next();
	}
}
ErrorStatus Polygon::explode(lit_list<unsigned long> & ids)
{
	Layer * pLayer = NULL;
	if (curModelSpace()->open((EntityObject*&)pLayer,uLayerId,forRead) != eOk)
	{
		ids.clear();
		return eOk;
	}
	//////////////////////////////////////////////////////////////////////////
	lit_node<Point2D> *pt = this->lVertexPts.get_head();
	Point2D sPt,ePt;
	sPt = pt->get_value();
	while (pt != lVertexPts.get_tail())
	{
		pt = pt->next();
		ePt = pt->get_value();
		Line2D * pLine = new Line2D(ePt,sPt);
		if (pLine)
		{
			unsigned long lineId = NULLID;
			if ((lineId = curModelSpace()->AddObjectToModelSpace((EntityObject*&)pLine)) == NULLID)
			{
				ids.clear();
				return eError;
			}
			pLine->layerId(uLayerId);
			ids.addNode(lineId);
			pLayer->AddSubEntity(lineId);
		}
		sPt = ePt;
	}
	sPt = lVertexPts.get_head()->get_value();
	ePt = lVertexPts.get_tail()->get_value();
	Line2D * pLine = new Line2D(ePt,sPt);
	if (pLine)
	{
		unsigned long lineId = NULLID;
		if ((lineId = curModelSpace()->AddObjectToModelSpace((EntityObject*&)pLine)) == NULLID)
		{
			ids.clear();
			return eError;
		}
		pLine->layerId(uLayerId);
		ids.addNode(lineId);
		pLayer->AddSubEntity(lineId);
	}
	curModelSpace()->erase(uLayerId);
	return eOk;
}