Saving and Loading a Triangulation – Ex. 11

int ex11_save_and_load_main()
{
    // * 1 *   Create 3 test zones for this demo and draw
    // the triangulation with pDiffZone highlighted.
    Fade_2D dt;
    Zone2* pEarthZone(NULL); // large circle
    Zone2* pMarsZone(NULL); // small circle
    Zone2* pDiffZone(NULL); // difference: large-small
	createTestZones(dt,pEarthZone,pMarsZone,pDiffZone);
	std::cout<<" triangulation, numT="<<dt.numberOfTriangles()<<std::endl;
	std::cout<<" pEarthZone, numT="<<pEarthZone->getNumberOfTriangles()<<std::endl;
	std::cout<<" pMarsZone, numT="<<pMarsZone->getNumberOfTriangles()<<std::endl;
	std::cout<<" pDiffZone, numT="<<pDiffZone->getNumberOfTriangles()<<std::endl;
	std::vector<Zone2*> vSaveZones; // Below we use this vector to save these zones
	vSaveZones.push_back(pEarthZone);
	vSaveZones.push_back(pMarsZone);
	vSaveZones.push_back(pDiffZone);
	pEarthZone->show("ex11_orgTriangulation_and_pEarthZone.ps",true,true);
	pMarsZone->show("ex11_orgTriangulation_and_pMarsZone.ps",true,true);
	pDiffZone->show("ex11_orgTriangulation_and_pDiffZone.ps",true,true);
  
	// * 2 *   Save all triangles and vSaveZones (filename provided)
	std::cout<<"saveTriangulation()..."<<std::endl;
	dt.saveTriangulation("ex11_saveTriangulation.fade",vSaveZones);

	// * 3 *   Save only vSaveZones (ofstream provided)
	std::cout<<"saveZones()..."<<std::endl;
	std::ofstream file("ex11_saveZones.fade",std::ios::binary);
	if(file.is_open())
	{
		bool bOK=dt.saveZones(file,vSaveZones);
		file.close();
		GASSEX(bOK); // End this demo if false
	}
	else
	{
		GASSEX(false); // End this demo
	}

	// * 4 *   Save an individual zone (stringstream provided)
	std::cout<<"Zone2::save()..."<<std::endl;
	std::stringstream sstr;
	pDiffZone->save(sstr);
}

int ex11_save_and_load_main()
{
	...
	// * 5 *   Reload the full triangulation with all zones
	std::cout<<"\nReloading...\n"<<std::endl;
	std::cout<<"Loading the full triangulation and the 3 zones..."<<std::endl;
	std::cout<<"  ...first argument is the filename, \"ex11_saveTriangulation.fade\""<<std::endl;
	Fade_2D loadDt1;
	std::vector<Zone2*> vLoadZones1;
	bool bOK1=loadDt1.load("ex11_saveTriangulation.fade",vLoadZones1);
	GASSEX(bOK1); // End this demo if false
	std::cout<<" triangulation, numT="<<loadDt1.numberOfTriangles()<<std::endl;
	std::cout<<" pEarthZone, numT="<<vLoadZones1[0]->getNumberOfTriangles()<<std::endl;
	std::cout<<" pMarsZone, numT="<<vLoadZones1[1]->getNumberOfTriangles()<<std::endl;
	std::cout<<" pDiffZone, numT="<<vLoadZones1[2]->getNumberOfTriangles()<<std::endl;
	vLoadZones1[2]->show("ex11_allTriangles_reloaded_pDiffZone_highlighted.ps",true,true);

	// * 6 *   Reload only the zones
	std::cout<<std::endl<<"\nLoading just the 3 zones"<<std::endl;
	std::cout<<"  ...first argument is ifstream(\"ex11_saveZones.fade\")"<<std::endl;
	Fade_2D loadDt2;
	std::vector<Zone2*> vLoadZones2;
	std::ifstream inFile("ex11_saveZones.fade",std::ios::binary);
	bool bOK2(false);
	if(inFile.is_open())
	{
		bOK2=loadDt2.load(inFile,vLoadZones2);
		inFile.close();
	}
	GASSEX(bOK2); // End this demo if false

	std::cout<<" triangulation, numT="<<loadDt2.numberOfTriangles()<<std::endl;
	std::cout<<" pEarthZone, numT="<<vLoadZones2[0]->getNumberOfTriangles()<<std::endl;
	std::cout<<" pMarsZone, numT="<<vLoadZones2[1]->getNumberOfTriangles()<<std::endl;
	std::cout<<" pDiffZone, numT="<<vLoadZones2[2]->getNumberOfTriangles()<<std::endl;
	vLoadZones2[2]->show("ex11_zones_reloaded_pDiffZone_highlighted.ps",true,true);

	// * 7 *   Reload one zone from stringstream
	std::cout<<std::endl<<"\nLoading only one zone"<<std::endl;
	std::cout<<"  ...first argument is a stringstream"<<std::endl;
	Fade_2D loadDt3;
	std::vector<Zone2*> vLoadZones3;
	bool bOK3=loadDt3.load(sstr,vLoadZones3);
	GASSEX(bOK3); // End this demo if false
	std::cout<<" triangulation, numT="<<loadDt3.numberOfTriangles()<<std::endl;
	std::cout<<" pDiffZone, numT="<<vLoadZones3[0]->getNumberOfTriangles()<<std::endl;
	vLoadZones3[0]->show("ex11_one_zone_reloaded_and_highlighted.ps",true,true);

	return 0;
}