void GenerateData(ref vtkPolyData input)
{
// Create a sphere
vtkSphereSource sphereSource = vtkSphereSource.New();
sphereSource.Update();
// Remove some cells
vtkIdTypeArray ids = vtkIdTypeArray.New();
ids.SetNumberOfComponents(1);
// Set values
ids.InsertNextValue(2);
ids.InsertNextValue(10);
vtkSelectionNode selectionNode = vtkSelectionNode.New();
selectionNode.SetFieldType((int)vtkSelectionNode.SelectionField.CELL);
selectionNode.SetContentType((int)vtkSelectionNode.SelectionContent.INDICES);
selectionNode.SetSelectionList(ids);
selectionNode.GetProperties().Set(vtkSelectionNode.INVERSE(), 1); //invert the selection
vtkSelection selection = vtkSelection.New();
selection.AddNode(selectionNode);
vtkExtractSelection extractSelection = vtkExtractSelection.New();
extractSelection.SetInputConnection(0, sphereSource.GetOutputPort());
#if VTK_MAJOR_VERSION_5
extractSelection.SetInput(1, selection);
#else
extractSelection.SetInputData(1, selection);
#endif
extractSelection.Update();
// In selection
vtkDataSetSurfaceFilter surfaceFilter = vtkDataSetSurfaceFilter.New();
surfaceFilter.SetInputConnection(extractSelection.GetOutputPort());
surfaceFilter.Update();
input.ShallowCopy(surfaceFilter.GetOutput());
}
/// <summary>
/// 左键释放时获取选择的对象
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void m_interactor_LeftButtonReleaseEvt(vtkObject sender, vtkObjectEventArgs e)
{
if (m_pickTarget == ePickTarget.None)
{
return;
}
//if (m_iren.GetControlKey() != 0)
// m_pickBoolean = ePickBollean.Add;
//else if (m_iren.GetShiftKey() != 0)
// m_pickBoolean = ePickBollean.Sub;
m_iren.GetEventPosition(ref endx, ref endy);
#region 点选对象
if (m_pickMode == ePickMode.DotPickMode) //如果是点选模式
{
vtkCellPicker cellPicker = new vtkCellPicker();
cellPicker.SetTolerance(0.005);
if (0 == cellPicker.Pick(endx, endy, 0, m_renderer))
{
return; //什么都没有选到就返回
}
FEMActor actor = cellPicker.GetActor() as FEMActor;
if (actor == null)
{
return;
}
if (m_pickTarget == ePickTarget.Actor)
{ //如果选择对象为
actor.IsSelected = true;
m_RWCtrl.Invalidate(); //貌似必须要用这个函数,update 不行
OnObjectsSelected(sender, e);
}
else if (m_pickTarget == ePickTarget.Cell)
{
int cellId = cellPicker.GetCellId();
actor.AddCellId(cellId, m_pickBoolean);
OnObjectsSelected(sender, e);
//if (cellId > 0)
// Console.WriteLine("dotselect cellid:{0}", cellId);
}
else if (m_pickTarget == ePickTarget.Point)
{
int pointId = cellPicker.GetPointId();
if (pointId != -1)
{
actor.AddPointId(pointId, m_pickBoolean);
OnObjectsSelected(sender, e);
// Console.WriteLine("dotselect pointid:{0}", pointId);
}
}
}
#endregion
else if (m_pickMode == ePickMode.RectPickMode) //如果是框选
{
vtkAreaPicker areaPicker = new vtkAreaPicker();
if (0 == areaPicker.AreaPick(startx, starty, endx, endy, m_renderer))
{ //如果什么也没选到就返回
//this.impactViewForm.ClearAllSelectCells();
return;
}
vtkProp3DCollection selectedActors = areaPicker.GetProp3Ds();
selectedActors.InitTraversal();
FEMActor selectedActor;
while ((selectedActor = selectedActors.GetNextProp3D() as FEMActor) != null)
{
vtkSelection selection = new vtkSelection();
vtkSelectionNode selectionNode = new vtkSelectionNode();
selection.AddNode(selectionNode);
vtkIdFilter idFilter = new vtkIdFilter();
idFilter.FieldDataOn();
idFilter.SetInput(selectedActor.GetMapper().GetInput());
idFilter.Update();
vtkExtractSelection frustum = new vtkExtractSelection();
frustum.SetInput(0, idFilter.GetOutput());
frustum.SetInput(1, selection);
selectionNode.Initialize();
selectionNode.SetContentType((int)vtkSelectionNode.SelectionContent.FRUSTUM);
if (m_pickTarget == ePickTarget.Cell)//如果选择的目标是cell
{
selectionNode.SetFieldType((int)vtkSelectionNode.SelectionField.CELL);
}
else if (m_pickTarget == ePickTarget.Point) //如果选择的目标是point
{
selectionNode.SetFieldType((int)vtkSelectionNode.SelectionField.POINT);
}
vtkPoints points = areaPicker.GetClipPoints();
vtkDoubleArray frustumcorners = new vtkDoubleArray();
frustumcorners.SetNumberOfComponents(4);
frustumcorners.SetNumberOfTuples(8);
for (int i = 0; i < 8; ++i)
{
double[] point = points.GetPoint(i);
frustumcorners.SetTuple4(i, point[0], point[1], point[2], 0.0);
}
selectionNode.SetSelectionList(frustumcorners);
frustum.Update();
vtkUnstructuredGrid grid = new vtkUnstructuredGrid();
grid = vtkUnstructuredGrid.SafeDownCast(frustum.GetOutput());
vtkIdTypeArray ids = null;
if (m_pickTarget == ePickTarget.Cell)
{
ids = vtkIdTypeArray.SafeDownCast(grid.GetCellData().GetArray("vtkOriginalCellIds"));
if (ids == null)
{
continue;
}
selectedActor.AddCellId(ids, m_pickBoolean);
OnObjectsSelected(sender, e);
}
else if (m_pickTarget == ePickTarget.Point)
{
ids = vtkIdTypeArray.SafeDownCast(grid.GetPointData().GetArray("vtkOriginalPointIds"));
if (ids == null)
{
continue;
}
selectedActor.AddPointId(ids, m_pickBoolean);
OnObjectsSelected(sender, e);
}
}
}
}
