|
|
| (7 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| This example demonstrates how to add points and edges to a mesh.
| | For N-D meshes, use itkMesh. For 2D surfaces embedded in 3D, use itkQuadEdgeMesh (in the Review directory). |
|
| |
|
| <source lang="cpp">
| | [[ITK/InsightClopedia/Meshes/AddPointsAndEdges|Add points and edges to a mesh.]] |
| #include "itkMesh.h"
| |
| #include "itkLineCell.h"
| |
|
| |
|
| const unsigned int Dimension = 3;
| | [[Mesh Decimation]] |
| typedef itk::Mesh< float, Dimension > MeshType;
| |
|
| |
| MeshType::Pointer CreatePointOnlyMesh();
| |
| void CreateMeshWithEdges();
| |
|
| |
|
| int main(int, char *[])
| | [[Mesh Subdivision]] |
| {
| |
| //CreatePointOnlyMesh();
| |
| CreateMeshWithEdges();
| |
|
| |
| return 0;
| |
| }
| |
| | |
| | |
| MeshType::Pointer CreatePointOnlyMesh()
| |
| {
| |
| MeshType::Pointer mesh = MeshType::New();
| |
| | |
| //create points
| |
| MeshType::PointType p0,p1,p2,p3;
| |
|
| |
| p0[0]= -1.0; p0[1]= -1.0; p0[2]= 0.0; // first point ( -1, -1, 0 )
| |
| p1[0]= 1.0; p1[1]= -1.0; p1[2]= 0.0; // second point ( 1, -1, 0 )
| |
| p2[0]= 1.0; p2[1]= 1.0; p2[2]= 0.0; // third point ( 1, 1, 0 )
| |
| p3[0]= 1.0; p3[1]= 1.0; p3[2]= 1.0; // third point ( 1, 1, 1 )
| |
| | |
| mesh->SetPoint( 0, p0 );
| |
| mesh->SetPoint( 1, p1 );
| |
| mesh->SetPoint( 2, p2 );
| |
| mesh->SetPoint( 3, p3 );
| |
| | |
| std::cout << "Points = " << mesh->GetNumberOfPoints() << std::endl;
| |
| | |
| //access points
| |
| typedef MeshType::PointsContainer::Iterator PointsIterator;
| |
| | |
| PointsIterator pointIterator = mesh->GetPoints()->Begin();
| |
| | |
| PointsIterator end = mesh->GetPoints()->End();
| |
| while( pointIterator != end )
| |
| {
| |
| MeshType::PointType p = pointIterator.Value(); // access the point
| |
| std::cout << p << std::endl; // print the point
| |
| ++pointIterator; // advance to next point
| |
| }
| |
| | |
| return mesh;
| |
| }
| |
| | |
| void CreateMeshWithEdges()
| |
| {
| |
| MeshType::Pointer mesh = CreatePointOnlyMesh();
| |
|
| |
| typedef MeshType::CellType::CellAutoPointer CellAutoPointer;
| |
| typedef itk::LineCell< MeshType::CellType > LineType;
| |
| //create a link to the previous point in the column (below the current point)
| |
| CellAutoPointer colline;
| |
| colline.TakeOwnership( new LineType );
| |
|
| |
| //unsigned int pointId0 = 0;
| |
| //unsigned int pointId1 = 1;
| |
|
| |
| unsigned int pointId0 = 2;
| |
| unsigned int pointId1 = 3;
| |
|
| |
| colline->SetPointId(0, pointId0); // line between points 0 and 1
| |
| colline->SetPointId(1, pointId1);
| |
| //std::cout << "Linked point: " << MeshIndex << " and " << MeshIndex - 1 << std::endl;
| |
| mesh->SetCell( 0, colline );
| |
| | |
| typedef MeshType::CellsContainer::Iterator CellIterator;
| |
| CellIterator cellIterator = mesh->GetCells()->Begin();
| |
| CellIterator CellsEnd = mesh->GetCells()->End();
| |
|
| |
| while( cellIterator != CellsEnd )
| |
| {
| |
| MeshType::CellType * cellptr = cellIterator.Value();
| |
| LineType * line = dynamic_cast<LineType *>( cellptr );
| |
|
| |
| /*
| |
| typePointIdConstIterator PointIdsBegin (void) const
| |
| PointIdIterator PointIdsBegin (void)
| |
| PointIdConstIterator PointIdsEnd (void) const
| |
| PointIdIterator PointIdsEnd (void)
| |
| */
| |
| long unsigned int* linePoint0 = line->PointIdsBegin();
| |
| //long unsigned int* linePoint1 = line->PointIdsEnd();
| |
| long unsigned int* linePoint1 = linePoint0+1;
| |
| std::cout << "line first point id: " << *linePoint0 << std::endl;
| |
| std::cout << "line second point id: " << *linePoint1 << std::endl;
| |
|
| |
| ++cellIterator;
| |
| }
| |
|
| |
| }
| |
| | |
| </source>
| |
