コード例 #1
0
ファイル: OMmodel.cpp プロジェクト: duoshengyu/FEM_elasticity
float Acos(OpenMesh::Vec3f vec1, OpenMesh::Vec3f vec2, OpenMesh::Vec3f vec3)
{
	float c = vec3.norm();
	float b = vec2.norm();
	float a = vec1.norm();
	float costheta = (a*a + b*b - c*c) / (2 * a * b);
	return acos(costheta);
}
コード例 #2
0
Mesh MeshManipulation::smoothLength(Mesh &mesh, int iterations)
{
    std::vector<Mesh::Point>  cogs;
    std::vector<Mesh::Point>::iterator cog_it;
    cogs.reserve(mesh.n_vertices());

    Mesh::VertexIter vIt, vEnd(mesh.vertices_end());
    Mesh::VertexVertexIter vvIt;
    OpenMesh::Vec3f newP;
    float sum;

    for(int i = 0; i < iterations; i++) {
        cogs.clear();

        for( vIt = mesh.vertices_begin(); vIt != vEnd; ++vIt ) {
            newP[0] = newP[1] = newP[2] = sum = 0.0f;

            for(vvIt = mesh.vv_iter(*vIt); vvIt.is_valid(); ++vvIt) {
                OpenMesh::Vec3f vec = mesh.point(*vvIt) - mesh.point(*vIt);
                sum += (1.0f / vec.length());
                newP += (vec / vec.length());
            }
            OpenMesh::Vec3f l = sum * newP;
            cogs.push_back(l);
        }

        float lambda = 0.2f;
        Mesh::VertexIter v_it, v_end(mesh.vertices_end());
        for (v_it=mesh.vertices_begin(), cog_it=cogs.begin(); v_it!=v_end; ++v_it, ++cog_it){
            if ( !mesh.is_boundary( *v_it ) ) {
                OpenMesh::Vec3f oldP = mesh.point(*v_it);
                OpenMesh::Vec3f L = *cog_it;
                OpenMesh::Vec3f P = oldP + lambda * L;
                mesh.set_point( *v_it, P );
            }
        }
    }

    return mesh;
}
コード例 #3
0
ファイル: main.cpp プロジェクト: alhunor/projects
// https://msdn.microsoft.com/en-us/library/ms182372.aspx -< Profiler
int main(int argc, char **argv)
{
	//ann_test();

	glutInit(&argc, argv);

	ValenceViewer window("Wireframe", 512, 512);

//	window.open_mesh("bunny.off");
	window.open_mesh("torus(10,3,50).off");

	glutMainLoop();
	
	
	/*
	cgal<myPoint> cg;
	pointSet<myPoint> ps("pentagram.pts");
	cg = ps;
	cg.polyStats();
	cout<<cg.inside(Point(15,0))<<endl; // yes
	cout<<cg.inside(Point(15,0.5))<<endl; // yes
	cout<<cg.inside(Point(1,1))<<endl; // yes
	cout<<cg.inside(Point(100,100))<<endl; // no
	return;
*/
	
//	testMyPolyTriangulation();
	

/*	LightVector<double> angles(7);
	angles.fill(0);
//	double lens[7] = {3, 6, 8, 10, 4, 9, 2};
	double lens[7] = {10, 3, 8, 10, 4, 9, 7};
	LightVector<double> edgeLengths(7, lens);
	mp.init(angles, edgeLengths);
	mp.list();
	mp.breakDown(1.618, true); // use the golden ratio, go clockwise
	mp.list();
	mp.breakDown(1.618, false); // use the golden ratio, go counter-clockwise
	mp.list();
	mp.head->clear();
	mp.head = NULL;
	return; */

	//tutorial1();
	//tutorial2("tetrahedron.off", "tetrahedron2.off",5);
	//tutorial1Hu();

//	Mat3 m(1,2,3,4,4,6,7,8,9);
//	Mat3 m2 = m.inverse();
//	cout<<m.determinant()<<endl;
//	cout<<m2;


	 TriMesh mesh2 = createTorus(10, 3, 50);
	 ring ri(mesh2);
	 LightVector<TriMesh::VertexHandle> vhv = ri.getRing(TriMesh::VertexHandle(0), 2);

	 for (unsigned int i= 0; i<vhv.size(); ++i)
	 {
		cout<< vhv[i]<<"  ";
	 }
	 OpenMesh::IO::write_mesh(mesh2, "torus.off");

	mesh2.request_face_normals();
	mesh2.request_vertex_normals();
	mesh2.update_normals();


	TriMesh::VertexHandle vh = TriMesh::VertexHandle(5);
	TriMesh::VertexFaceIter vfi = mesh2.vf_iter(vh);
	int cc=0;
	OpenMesh::Vec3f norm (0, 0, 0), normv;
	while (vfi)
	{
		cout<<"+"<<vfi.handle()<<endl;
		norm += mesh2.normal(*vfi);
		++cc;
		++vfi;
	}
	double len = norm.length();
	if (len != 0)
	{
		norm *= 1/len;
	}

	normv = mesh2.normal(vh);
	
	meshVolume(mesh2);

	return 0;

	TriMesh mesh;
	 //mesh = createSphere(2.0f,4); OpenMesh::IO::write_mesh(mesh, "tetraSphere.off");
	//mesh = createTetra(2); OpenMesh::IO::write_mesh(mesh, "tetra.off"); readmesh(mesh, "tetra.off");

//	readmesh(mesh, "sphereholes.off");
	readmesh(mesh, "lyukas.off");

	// suboptimal, add normals to all faces while we need it only for the 1-ring around the hole
	if ( ! mesh.has_face_normals())
		mesh.request_face_normals();
//	mesh.update_normals();

	holeFiller hf(mesh);
	hf.findHoles();
	hf.displayHoles();
//	hf.fill(0);

// Az emberkeben, i.e. readmesh(mesh, "lyukas.off");
//	hf.fill(0); // hat
//	hf.fill(1); // has
	hf.fill(2); // fej
//	printOff(mesh, holes[2]);

	mesh.release_face_normals(); // always release after request

//	closeHole(mesh, holes[1]);
//	closeHole(mesh, holes[0]);
//	closeHole(mesh, holes[2]);


/*	mesh.request_face_normals();
	if (mesh.has_vertex_normals() ) mesh.update_vertex_normals();

  for (; v_it!=v_end; ++v_it)
    this->set_normal(v_it.handle(), calc_vertex_normal(v_it.handle()));
*/



/*	readmesh(mesh, "icosahedron.off");
	OpenMesh::Vec3f P(-2,0.2,2);
	OpenMesh::FaceHandle fh = faceClosestToPoint(mesh,P);
	cout<<fh.idx();
	
	extendMesh(mesh, fh, P, true);
	OpenMesh::IO::write_mesh(mesh, "ico--.off");
	*/

	//cout<<"Volume = "<<meshVolume(mesh)<<endl;
//	OpenMesh::IO::write_mesh(mesh, "spherevolt.off");
	OpenMesh::IO::write_mesh(mesh, "lyukasvolt.off");
} // void main()
コード例 #4
0
ファイル: OMmodel.cpp プロジェクト: duoshengyu/FEM_elasticity
//-----------------------------------------------------------------------
//read mesh from file
//-----------------------------------------------------------------------
void OMmodel::OpenMeshReadFile(const char * filename)
{
	// request vertex normals, so the mesh reader can use normal information
	// if available
	mesh.request_vertex_normals();
	// request face normals,
	mesh.request_face_normals();
	//request vertex color
	mesh.request_vertex_colors();
	// assure we have vertex normals
	if (!mesh.has_vertex_normals())
	{
		std::cerr << "ERROR: Standard vertex property 'Normals' not available!\n";
	}

	OpenMesh::IO::Options opt;
	// read mesh from file
	if (!OpenMesh::IO::read_mesh(mesh, filename, opt))
	{
		std::cerr << "Error: Cannot read mesh from " << filename << std::endl;
	}

	// If the file did not provide vertex normals, then calculate them
	if (!opt.check(OpenMesh::IO::Options::VertexNormal))
	{
		// let the mesh update the normals
		mesh.update_normals();
	}
	// this vertex property stores the computed  mean curvature
	OpenMesh::VPropHandleT<double> HCurvature;
	mesh.add_property(HCurvature);
	//store valence
	OpenMesh::VPropHandleT<int> valence;
	mesh.add_property(valence);
	//store gaussian curvature
	OpenMesh::VPropHandleT<double> GCurvature;
	mesh.add_property(GCurvature);
	//caculate curvature and valence
	vector<MyMesh::Point> oneRing;
	float maxCur = 0;
	float minCur = 0;
	float maxGCur = 0;
	float minGCur = 0;
    int val = 0;

	for (MyMesh::VertexIter v_it = mesh.vertices_begin(); v_it != mesh.vertices_end(); ++v_it)
	{
		oneRing.clear();
		for (MyMesh::VertexVertexIter vv_it = mesh.vv_iter(*v_it); vv_it.is_valid(); ++vv_it)
		{
			++val;
			oneRing.push_back(mesh.point(*vv_it));
		}

		OpenMesh::Vec3f H = OpenMesh::Vec3f(0.0f, 0.0f, 0.0f);
		float A = 0;
		float Gcurvature = 0;
		float Hcurvature = 0;
		float theta = 0;
		float alpha = 0;
		float beta = 0;
		float arccosAlpha = 0;
		float arccosBeta = 0;
		float arccosTheta = 0;
		float cotAlpha = 0;
		float cotBeta = 0;
		for (int i = 0; i < val; ++i)
		{
			OpenMesh::Vec3f Vvtovi, Vvtovi1, Vvi_1tovi, Vvi_1tov, Vvi1tovi, Vvi1tov, Vvitovi1;
			MyMesh::Point PositionV = mesh.point(*v_it);
			Vvtovi = oneRing[i] - PositionV;
			OpenMesh::Vec3f nVvtovi = Vvtovi.normalized();
			if (i == 0)
			{
				Vvi_1tovi = oneRing[0] - oneRing[val - 1];
				Vvi_1tov = PositionV - oneRing[val - 1];
				Vvi_1tovi.normalize();
				Vvi_1tov.normalize();
			}
			else
			{
				Vvi_1tovi = oneRing[i] - oneRing[i - 1];
				Vvi_1tov = PositionV - oneRing[i - 1];
				Vvi_1tovi.normalize();
				Vvi_1tov.normalize();
			}
			if (i == val - 1)
			{
				Vvtovi1 = oneRing[0] - PositionV;
				Vvi1tovi = oneRing[i] - oneRing[0];
				Vvi1tov = PositionV - oneRing[0];
				Vvtovi1.normalize();
				Vvi1tovi.normalize();
				Vvi1tov.normalize();
			}
			else
			{
				Vvtovi1 = oneRing[i + 1] - PositionV;
				Vvi1tovi = oneRing[i] - oneRing[i + 1];
				Vvi1tov = PositionV - oneRing[i + 1];
				Vvtovi1.normalize();
				Vvi1tovi.normalize();
				Vvi1tov.normalize();
			}

			alpha = dot(Vvi_1tovi, Vvi_1tov);
			beta = dot(Vvi1tov, Vvi1tovi);
			arccosAlpha = acos(alpha);
			arccosBeta = acos(beta);
			cotAlpha = cot(arccosAlpha);
			cotBeta = cot(arccosBeta);
			A += ((cotAlpha + cotBeta) * Vvtovi.sqrnorm());
			H += ((cotAlpha + cotBeta) * Vvtovi);

			//theta += Acos(Vvtovi, Vvtovi1, Vvi1tovi);
			theta = dot(nVvtovi, Vvtovi1);
			//debug2 << nVvtovi.sqrnorm()<<" "<<acos(theta) << endl;
			arccosTheta += acos(theta);

		}
		//debug << arccosTheta << " " << H << " " << A << endl;;
		A = A / 8.0f;
		H = 2.0f * (H / A);
		Hcurvature = 0.5f * H.norm();
		Gcurvature = ((2.0f * M_PI) - arccosTheta)/ A;
		maxCur = max(Hcurvature, maxCur);
		minCur = min(Hcurvature, minCur);
		if (Gcurvature < 1000000)
		maxGCur = max(Gcurvature, maxGCur);
		minGCur = min(Gcurvature, minGCur);
		mesh.property(valence, *v_it) = val;
		mesh.property(HCurvature, *v_it) = Hcurvature;
		mesh.property(GCurvature, *v_it) = Gcurvature;

		//debug << val << " " << Hcurvature << " " << Gcurvature << endl;

		val = 0;
	}
	//std::cout << 2.0f * M_PI << endl;
	//std::cout << maxCur << "   " << minCur <<endl;
	//std::cout << maxGCur << "   " << minGCur << endl;

	for (MyMesh::FaceIter f_it = mesh.faces_begin(); f_it != mesh.faces_end(); ++f_it)
	{
		for (MyMesh::FaceVertexIter fv_it = mesh.fv_iter(*f_it); fv_it.is_valid(); ++fv_it)
		{
			int value = mesh.property(valence, *fv_it);
			if (value <= 4)
			{
				meshVertexColorBuffer.push_back(OpenMesh::Vec3f(0.0f, 0.0f, 1.0f));
			}
			if (value >= 5 && value <= 7)
			{
				meshVertexColorBuffer.push_back(OpenMesh::Vec3f(0.0f, 1.0f, 0.0f));
			}
			if (value >= 8)
			{
				meshVertexColorBuffer.push_back(OpenMesh::Vec3f(1.0f, 0.0f, 0.0f));
			}

			//cout << mesh.property(curvature, *fv_it) << endl;
			meshCurColorBuffer.push_back(interporlationColor(maxCur, minCur, mesh.property(HCurvature, *fv_it), 1));
			meshGCurColorBuffer.push_back(interporlationColor(maxGCur, minGCur, mesh.property(GCurvature, *fv_it), 10));
			meshVertexBuffer.push_back(mesh.point(*fv_it));
			meshVertexNormalBuffer.push_back(mesh.normal(*fv_it));
			meshFaceNormalBuffer.push_back(mesh.normal(*f_it));
		}
	}


	// don't need the normals anymore? Remove them!
	mesh.release_vertex_normals();
	// dispose the face normals, as we don't need them anymore
	mesh.release_face_normals();
	//release color
	mesh.release_vertex_colors();


	mesh.request_vertex_status();
	meshVetexNum = mesh.n_vertices();
	mesh.request_face_status();
	meshFaceNum = mesh.n_faces();
	mesh.request_halfedge_status();
	meshHalfEdgeNum = mesh.n_halfedges();

	// iterate over all halfedges
	for (MyMesh::HalfedgeIter h_it = mesh.halfedges_begin(); h_it != mesh.halfedges_end(); ++h_it)
	{
		if (!mesh.face_handle(*h_it).is_valid())
		{
			++meshBoundryEdgeNum;
		}
	}

	mesh.release_face_status();
	mesh.release_vertex_status();
	mesh.release_halfedge_status();
}