public override void UpatePoints()
{
// Get Point List
if (Parent == null) return;
IList<CTwoPoints> pointsList = Parent.PointsList;
// Update points
if (m_points == null)
{
m_points = new vtk.vtkPoints();
// Create Points
m_points.Reset();
foreach (CTwoPoints pair in pointsList)
{
m_points.InsertNextPoint(pair.First.Point);
m_points.InsertNextPoint(pair.Second.Point);
}
vtk.vtkCellArray lines = new vtk.vtkCellArray();
for (int i = 0; i < pointsList.Count; ++i)
{
// Create Linee
vtk.vtkLine line = new vtk.vtkLine();
line.GetPointIds().SetId(0, i * 2);
line.GetPointIds().SetId(1, i * 2 + 1);
lines.InsertNextCell(line);
}
vtk.vtkPolyData polyData = new vtk.vtkPolyData();
polyData.SetPoints(m_points);
polyData.SetLines(lines);
vtk.vtkPolyDataMapper dataMapper = new vtk.vtkPolyDataMapper();
dataMapper.SetInput(polyData);
Actor.SetMapper(dataMapper);
}
else if (m_points.GetNumberOfPoints() != pointsList.Count * 2)
{
return;
}
else
{
m_points.Reset();
foreach (CTwoPoints pair in pointsList)
{
m_points.InsertNextPoint(pair.First.Point);
m_points.InsertNextPoint(pair.Second.Point);
}
m_points.Modified();
}
}
void Run()
{
// Create a selection window. We will display the point and cell ids
// that lie within this window.
int xmin = 200;
xLength = 100;
xmax = xmin + xLength;
int ymin = 200;
yLength = 100;
ymax = ymin + yLength;
pts = new vtk.vtkPoints();
pts.InsertPoint(0, xmin, ymin, 0);
pts.InsertPoint(1, xmax, ymin, 0);
pts.InsertPoint(2, xmax, ymax, 0);
pts.InsertPoint(3, xmin, ymax, 0);
vtk.vtkCellArray rect = new vtk.vtkCellArray();
rect.InsertNextCell(5);
rect.InsertCellPoint(0);
rect.InsertCellPoint(1);
rect.InsertCellPoint(2);
rect.InsertCellPoint(3);
rect.InsertCellPoint(0);
vtk.vtkPolyData selectRect = new vtk.vtkPolyData();
selectRect.SetPoints(pts);
selectRect.SetLines(rect);
vtk.vtkPolyDataMapper2D rectMapper = new vtk.vtkPolyDataMapper2D();
rectMapper.SetInput(selectRect);
vtk.vtkActor2D rectActor = new vtk.vtkActor2D();
rectActor.SetMapper(rectMapper);
// Create a sphere and its associated mapper and actor.
vtk.vtkSphereSource sphere = new vtk.vtkSphereSource();
vtk.vtkPolyDataMapper sphereMapper = new vtk.vtkPolyDataMapper();
sphereMapper.SetInputConnection(sphere.GetOutputPort());
vtk.vtkPolyDataMapper.GlobalImmediateModeRenderingOn();
vtk.vtkActor sphereActor = new vtk.vtkActor();
sphereActor.SetMapper(sphereMapper);
// Generate data arrays containing point and cell ids
vtk.vtkIdFilter ids = new vtk.vtkIdFilter();
ids.SetInputConnection(sphere.GetOutputPort());
ids.PointIdsOn();
ids.CellIdsOn();
ids.FieldDataOn();
// Create the renderer here because vtkSelectVisiblePoints needs it.
vtk.vtkRenderer ren = new vtk.vtkRenderer();
// Create labels for points
visPts = new vtk.vtkSelectVisiblePoints();
visPts.SetInputConnection(ids.GetOutputPort());
visPts.SetRenderer(ren);
visPts.SelectionWindowOn();
visPts.SetSelection(xmin, xmin + xLength, ymin, ymin + yLength);
// Create the mapper to display the point ids. Specify the format to
// use for the labels. Also create the associated actor.
vtk.vtkLabeledDataMapper ldm = new vtk.vtkLabeledDataMapper();
ldm.SetInputConnection(visPts.GetOutputPort());
ldm.SetLabelFormat("%g");
ldm.SetLabelModeToLabelFieldData();
vtk.vtkActor2D pointLabels = new vtk.vtkActor2D();
pointLabels.SetMapper(ldm);
// Create labels for cells
vtk.vtkCellCenters cc = new vtk.vtkCellCenters();
cc.SetInputConnection(ids.GetOutputPort());
visCells = new vtk.vtkSelectVisiblePoints();
visCells.SetInputConnection(cc.GetOutputPort());
visCells.SetRenderer(ren);
visCells.SelectionWindowOn();
visCells.SetSelection(xmin, xmin + xLength, ymin, ymin + yLength);
// Create the mapper to display the cell ids. Specify the format to
// use for the labels. Also create the associated actor.
vtk.vtkLabeledDataMapper cellMapper = new vtk.vtkLabeledDataMapper();
cellMapper.SetInputConnection(visCells.GetOutputPort());
cellMapper.SetLabelFormat("%g");
cellMapper.SetLabelModeToLabelFieldData();
cellMapper.GetLabelTextProperty().SetColor(0, 1, 0);
vtk.vtkActor2D cellLabels = new vtk.vtkActor2D();
cellLabels.SetMapper(cellMapper);
// Create the RenderWindow and RenderWindowInteractor
renWin = new vtk.vtkRenderWindow();
renWin.AddRenderer(ren);
vtk.vtkRenderWindowInteractor iren = new vtk.vtkRenderWindowInteractor();
iren.SetRenderWindow(renWin);
// Add the actors to the renderer; set the background and size;
// render
ren.AddActor(sphereActor);
ren.AddActor2D(rectActor);
ren.AddActor2D(pointLabels);
ren.AddActor2D(cellLabels);
ren.SetBackground(1, 1, 1);
renWin.SetSize(500, 500);
// Initialize the interactor.
iren.Initialize();
renWin.Render();
// Move the selection window across the data set.
MoveWindow();
// Put the selection window in the center of the render window.
// This works because the xmin = ymin = 200, xLength = yLength = 100, and
// the render window size is 500 x 500.
PlaceWindow(xmin, ymin);
// Now start normal interaction.
iren.Start();
vtk.vtkWin32OpenGLRenderWindow win32win =
vtk.vtkWin32OpenGLRenderWindow.SafeDownCast(renWin);
if (null != win32win) win32win.Clean();
}