C++ PolyhedronPtr::vertices_begin方法代码示例

void Various_Processing_Component::LaplacianSmoothing (PolyhedronPtr pMesh, double deformFactor, int iteraNum, bool preserveBoundaries)
{
	Vertex_iterator	pVertex;
	int numVertex = pMesh->size_of_vertices();
	Vector * newPositions = new Vector[numVertex];

	for (int i=0; i<iteraNum; i++)
	{
		int n = 0;
		for (pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end(); pVertex++)
		{
			Vector currentVector = pVertex->point() - CGAL::ORIGIN;

			// do not smooth the boundary vertices if demanded by user
			bool is_border_vertex = false;
			bool stopFlag = false;
			Halfedge_around_vertex_circulator hav = (*pVertex).vertex_begin();
			do
			{
				if (hav->is_border()==true)
				{
					is_border_vertex = true;
					stopFlag = true;
				}
				hav++;
			} while ((hav!=(*pVertex).vertex_begin())&&(stopFlag==false));

			if ((preserveBoundaries==true)&&(is_border_vertex==true))
			{
				newPositions[n] = currentVector;
				n++;
				continue;
			}

			std::size_t degree = (*pVertex).vertex_degree();
			double alpha = 1.0/degree;
			Vector vectemp = Point3d(0,0,0) - CGAL::ORIGIN;
			Halfedge_around_vertex_circulator h = (*pVertex).vertex_begin();
			do
			{
				vectemp = vectemp+(h->opposite()->vertex()->point()-CGAL::ORIGIN-currentVector)*alpha;
				++h;
			} while (h != (*pVertex).vertex_begin());
			newPositions[n] = currentVector + deformFactor*vectemp;
			n++;
		}

		n = 0;
		for (pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end(); pVertex++)
		{
			pVertex->point() = Point3d(0,0,0) + newPositions[n];
			n++;
		}
	}

	delete [] newPositions;
	newPositions = 0;

	pMesh->compute_normals();
}

	void MSDM2_Component::ConstructColorMap(PolyhedronPtr P, int MetricOrHausdorff)
	{
		if(MetricOrHausdorff==1)
		{
			if(P->IsDistanceComputed==true)
			{

				double R;
				int indiceLut;
				Vertex_iterator pVertex = NULL;

				if(MaxMSDM2>MinMSDM2)
				{
				  for (pVertex = P->vertices_begin();
					  pVertex != P->vertices_end();
					  pVertex++)
				  {

					
						R=(pVertex->MSDM2_Local-MinMSDM2)/(MaxMSDM2-MinMSDM2)*255;
					
						indiceLut=floor(R);
						pVertex->color(LUT_CourbureClust[3*indiceLut],LUT_CourbureClust[3*indiceLut+1],LUT_CourbureClust[3*indiceLut+2]);

				  }
				}
			}
		}
		else
		{
			if(P->IsDistanceComputed==true)
			{

				double R;
				int indiceLut;
				Vertex_iterator pVertex = NULL;

				if(MaxMSDM2>MinMSDM2)
				{
				  for (pVertex = P->vertices_begin();
					  pVertex != P->vertices_end();
					  pVertex++)
				  {

						float d=sqrt((pVertex->point()-pVertex->match)*(pVertex->point()-pVertex->match));
						R=(d-MinMSDM2)/(MaxMSDM2-MinMSDM2)*255;
					
						indiceLut=floor(R);
						pVertex->color(LUT_CourbureClust[3*indiceLut],LUT_CourbureClust[3*indiceLut+1],LUT_CourbureClust[3*indiceLut+2]);

				  }
				}
			}

		}
	}

void Various_Processing_Component::NoiseAdditionUniform (PolyhedronPtr pMesh, double noiseIntensity, bool preserveBoundaries)
{
	// mesh centre calculation based on discrete "moment".
	//TODO: maybe in the future it will be based on volume moment.
	int numVertex = pMesh->size_of_vertices();;
	Vector centroid = Point3d(0,0,0) - CGAL::ORIGIN;
	double distancetoCentroid = 0.0;
	Vertex_iterator	pVertex;
	for (pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end(); pVertex++)
	{
		Vector vectemp = pVertex->point() - CGAL::ORIGIN;
		centroid = centroid + vectemp;
	}
	centroid = centroid/numVertex;

	// calculate the average distance from vertices to mesh centre
	for (pVertex = pMesh->vertices_begin(); pVertex!= pMesh->vertices_end(); pVertex++)
	{
		Vector vectemp = pVertex->point() - CGAL::ORIGIN;
		distancetoCentroid = distancetoCentroid + (double)std::sqrt((vectemp - centroid) * (vectemp - centroid));
	}
	distancetoCentroid = distancetoCentroid/numVertex;

	// add random uniform-distributed (between [-noiseLevel, +noiseLevel])
	srand((unsigned)time(NULL));
	double noisex, noisey, noisez;
	double noiseLevel = distancetoCentroid * noiseIntensity;
	for (pVertex = pMesh->vertices_begin(); pVertex!= pMesh->vertices_end(); pVertex++)
	{
		// keep boundaries untouched if demanded by user
		bool is_border_vertex = false;
		bool stopFlag = false;
		Halfedge_around_vertex_circulator hav = (*pVertex).vertex_begin();
		do
		{
			if (hav->is_border()==true)
			{
				is_border_vertex = true;
				stopFlag = true;
			}
			hav++;
		} while ((hav!=(*pVertex).vertex_begin())&&(stopFlag==false));

		if ((preserveBoundaries==true)&&(is_border_vertex==true))
			continue;

		noisex = noiseLevel * (1.0*rand()/RAND_MAX-0.5)*2;
		noisey = noiseLevel * (1.0*rand()/RAND_MAX-0.5)*2;
		noisez = noiseLevel * (1.0*rand()/RAND_MAX-0.5)*2;
		Vector temp = Point3d(noisex, noisey, noisez) - CGAL::ORIGIN;
		pVertex->point() = pVertex->point() + temp;
	}

	// for correct rendering, we need to update the mesh normals
	pMesh->compute_normals();
}

void MSDM2_Component::Matching_Multires_Init(PolyhedronPtr m_PolyDegrad, PolyhedronPtr m_PolyOriginal , Facet * _TabMatchedFacet)
	{
		
		 // constructs AABB tree
		 AABB_Tree tree(m_PolyOriginal->facets_begin(),m_PolyOriginal->facets_end());
		 tree.accelerate_distance_queries();

		//Searching for the closest point and facet for each vertex

		int ind=0;
		for(Vertex_iterator	pVertex	= m_PolyDegrad->vertices_begin();
					pVertex	!= m_PolyDegrad->vertices_end();
					pVertex++)
		{
			pVertex->MSDM2_Local=0;
			 // computes closest point and primitive id
			Point_and_primitive_id pp = tree.closest_point_and_primitive(pVertex->point());
			Point3d Nearest=pp.first;
			Facet_iterator f_Nearest = pp.second; // closest primitive id

			pVertex->match=Nearest;
			_TabMatchedFacet[ind]=*f_Nearest;

			ind++;

			
			
		}
		
}

string Various_Tools_Component::printClickedVertices(PolyhedronPtr pMesh,double x,double y,int tolerance)
{
	GLdouble *model;GLdouble *proj;GLint *view;

	view = new GLint[4];
	proj = new GLdouble[16];
	model = new GLdouble[16];

	glGetIntegerv(GL_VIEWPORT,view);
	glGetDoublev(GL_MODELVIEW_MATRIX,model);
	glGetDoublev(GL_PROJECTION_MATRIX,proj);

	y = view[3] - y;

	GLdouble wx,wy,wz;
	char szInfoVertex[256];

	string sInfoVertex = "";
	int vertexID = 0;

	//VertexID + 4就是该顶点在.obj文件中的行数
	for(Vertex_iterator pVertex = pMesh->vertices_begin();pVertex != pMesh->vertices_end();pVertex++)
	{
		gluProject(pVertex->point().x(),pVertex->point().y
			(),pVertex->point().z(),model,proj,view,&wx,&wy,&wz);
		if (wz > 0.0 && wz < 1.0)
		{
			if (x > floor(wx)-tolerance && x < floor(wx)+tolerance)
			{
				if (y > floor(wy) - tolerance && y < floor(wy)+tolerance)
				{
					sprintf(szInfoVertex, "Vertex: %u  -  (%lf, %lf, %lf)", vertexID, pVertex->point().x(), pVertex->point().y(), pVertex->point().z());
					sInfoVertex.assign(szInfoVertex);
				}
			}
		}
		vertexID++;
	}

	delete [] view;
	delete [] model;
	delete [] proj;

	return sInfoVertex;
}

// Description : Initialize all flags -verticeces and facets- to FREE and give order to vertices
// This function is called within every conquest.
void Init(PolyhedronPtr pMesh)
{
	int i = 0;

	// vertices flags initialization
	Vertex_iterator pVertex = NULL;
	for(pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end(); i++,pVertex++)
	{
		pVertex->Vertex_Flag_S = FREE;
		pVertex->Vertex_Number_S = i;
		pVertex->Vertex_Sign_S = NOSIGN;
	}

	// facets flag initialization.
	Facet_iterator pFace = NULL;
	for(pFace = pMesh->facets_begin(); pFace != pMesh->facets_end(); pFace++)
	{
		pFace->Facet_Flag_S = FREE;
	}
}

void mepp_component_Boolean_Operations_plugin::New_Position()
{
    QApplication::setOverrideCursor(Qt::WaitCursor);

    // active viewer
    if (mw->activeMdiChild() != 0)
    {
        float x, y, z;
        double a, b, c, w;
        Viewer* viewer = (Viewer *)mw->activeMdiChild();

        ScenePtr S = viewer->getScenePtr();

        for(int i = 0; i<viewer->getScenePtr()->get_nb_polyhedrons(); i++)
        {
            Vertex_iterator pVertex = NULL;

            PolyhedronPtr P = S->get_polyhedron(i);

            viewer->frame(i)->getPosition(x,y,z);
            viewer->frame(i)->getOrientation(a,b,c,w);

            Vec T(x, y, z);
            Quaternion Q(a, b, c, w);

            for (pVertex = P->vertices_begin(); pVertex != P->vertices_end(); pVertex++)
            {
                Vec V = Q * Vec(pVertex->point().x(), pVertex->point().y(), pVertex->point().z()) + T;
                pVertex->point() = CGAL::ORIGIN + Vector(V[0], V[1], V[2]);
            }

            viewer->frame(i)->setPosition(0,0,0);
            viewer->frame(i)->setOrientation(0,0,0,1);
        }
        viewer->show();
        viewer->recreateListsAndUpdateGL();
    }
    QApplication::restoreOverrideCursor();
}

// TODO: fixing after quantization the potentially introduced degeneracies, such as removing the null surface facet
void Various_Processing_Component::CoordinateQuantization (PolyhedronPtr pMesh, int bitDepth)
{
	Vertex_iterator	pVertex;
	double quantizationLevel = std::pow(2.0,bitDepth);
	pVertex = pMesh->vertices_begin();
	Point3d point = pVertex->point();
	double xmax = double(point.x());
	double xmin = xmax;
	double ymax = double(point.y());
	double ymin = ymax;
	double zmax = double(point.z());
	double zmin = zmax;
	pVertex++;

	for (; pVertex != pMesh->vertices_end(); pVertex++)
	{
		point = pVertex->point();
		double x = double(point.x());
		double y = double(point.y());
		double z = double(point.z());
		if (x>xmax)
			xmax = x;
		if (x<xmin)
			xmin = x;
		if (y>ymax)
			ymax = y;
		if (y<ymin)
			ymin = y;
		if (z>zmax)
			zmax = z;
		if (z<zmin)
			zmin = z;
	}

	double xstep = (xmax-xmin)/quantizationLevel;
	double ystep = (ymax-ymin)/quantizationLevel;
	double zstep = (zmax-zmin)/quantizationLevel;

	for (pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end();pVertex++)
	{
		point = pVertex->point();
		double x = double(point.x());
		double y = double(point.y());
		double z = double(point.z());

		double xquantified, yquantified, zquantified;

		double xint = 1.0*std::floor((x-xmin)/xstep)*xstep + xmin;
		double xfrac = x - xint;
		if (xfrac<=(0.5*xstep))
			xquantified = xint;
		else
			xquantified = xint + xstep;

		double yint = 1.0*std::floor((y-ymin)/ystep)*ystep + ymin;
		double yfrac = y - yint;
		if (yfrac<=(0.5*ystep))
			yquantified = yint;
		else
			yquantified = yint +ystep;

		double zint = 1.0*std::floor((z-zmin)/zstep)*zstep + zmin;
		double zfrac = z - zint;
		if (zfrac<=(0.5*zstep))
			zquantified = zint;
		else
			zquantified = zint + zstep;

		pVertex->point() = Point3d(xquantified,yquantified,zquantified);
	}

	pMesh->compute_normals();
}

// this time, we add Gaussian-distributed additive noise to the mesh vertex coordinates
// the standard deviation of the Gaussian distribution is "noiseLevel = distancetoCentroid * noiseIntensity"
void Various_Processing_Component::NoiseAdditionGaussian (PolyhedronPtr pMesh, double noiseIntensity, bool preserveBoundaries)
{
	int numVertex = pMesh->size_of_vertices();;
	Vector centroid = Point3d(0,0,0) - CGAL::ORIGIN;
	double distancetoCentroid = 0.0;
	Vertex_iterator	pVertex;
	for (pVertex = pMesh->vertices_begin(); pVertex != pMesh->vertices_end(); pVertex++)
	{
		Vector vectemp = pVertex->point() - CGAL::ORIGIN;
		centroid = centroid + vectemp;
	}
	centroid = centroid/numVertex;

	for (pVertex = pMesh->vertices_begin(); pVertex!= pMesh->vertices_end(); pVertex++)
	{
		Vector vectemp = pVertex->point() - CGAL::ORIGIN;
		distancetoCentroid = distancetoCentroid + (double)std::sqrt((vectemp - centroid) * (vectemp - centroid));
	}
	distancetoCentroid = distancetoCentroid/numVertex;

	srand((unsigned)time(NULL));
	double noisex, noisey, noisez;
	double * gaussNumbers = new double[3];
	double noiseLevel = distancetoCentroid * noiseIntensity;
	for (pVertex = pMesh->vertices_begin(); pVertex!= pMesh->vertices_end(); pVertex++)
	{
		bool is_border_vertex = false;
		bool stopFlag = false;
		Halfedge_around_vertex_circulator hav = (*pVertex).vertex_begin();
		do
		{
			if (hav->is_border()==true)
			{
				is_border_vertex = true;
				stopFlag = true;
			}
			hav++;
		} while ((hav!=(*pVertex).vertex_begin())&&(stopFlag==false));

		if ((preserveBoundaries==true)&&(is_border_vertex==true))
			continue;

		// pseudo-random Gaussian-distributed numbers generation from uniformly-distributed pseudo-random numbers
		double x, y, r2;
		for (int i=0; i<3; i++)
		{
			do
			{
				x = -1.0 + 2.0 * 1.0*rand()/RAND_MAX;
				y = -1.0 + 2.0 * 1.0*rand()/RAND_MAX;
				r2 = x * x + y * y;
			} while ((r2>1.0)||(r2==0.0));
			gaussNumbers[i] = y * sqrt(-2.0 * log(r2) / r2);
		}

		noisex = noiseLevel * gaussNumbers[0];
		noisey = noiseLevel * gaussNumbers[1];
		noisez = noiseLevel * gaussNumbers[2];
		Vector temp = Point3d(noisex, noisey, noisez) - CGAL::ORIGIN;
		pVertex->point() = pVertex->point() + temp;
	}

	pMesh->compute_normals();

	delete [] gaussNumbers;
	gaussNumbers = 0;
}