void Test()
{
foreach (var actor in m_actorDict.Keys)
{
int xmin = 0;
int xlength = 1000;
int xmax = xmin + xlength;
int ymin = 0;
int ylength = 1000;
int ymax = ymin + ylength;
int[] pos = { xmin, xmin + xlength, ymin, ymin + ylength };
#region RECT
vtkPoints pts = vtkPoints.New();
pts.InsertPoint(0, xmin, ymin, 0);
pts.InsertPoint(1, xmax, ymin, 0);
pts.InsertPoint(2, xmax, ymax, 0);
pts.InsertPoint(3, xmin, ymax, 0);
vtkCellArray rect = vtkCellArray.New();
rect.InsertNextCell(5);
rect.InsertCellPoint(0);
rect.InsertCellPoint(1);
rect.InsertCellPoint(2);
rect.InsertCellPoint(3);
rect.InsertCellPoint(0);
vtkPolyData selectRect = vtkPolyData.New();
selectRect.SetPoints(pts);
selectRect.SetLines(rect);
vtkPolyDataMapper2D rectMapper = vtkPolyDataMapper2D.New();
rectMapper.SetInput(selectRect);
vtkActor2D rectActor = vtkActor2D.New();
rectActor.SetMapper(rectMapper);
m_render.AddActor(rectActor);
#endregion
vtkIdFilter ids = vtkIdFilter.New();
ids.SetInput(actor.GetMapper().GetInput());
//ids.SetInputConnection( actor.GetMapper().GetOutputPort());
ids.PointIdsOn();
ids.FieldDataOn();
vtkSelectVisiblePoints visPts = vtkSelectVisiblePoints.New();
visPts.SetInput(ids.GetOutput());
visPts.SetRenderer(m_render);
visPts.SelectInvisibleOn();
visPts.SelectionWindowOn();
//visPts.SelectInvisibleOff();
visPts.SetSelection(pos[0], pos[1], pos[2], pos[3]);
vtkLabeledDataMapper labelMapper = vtkLabeledDataMapper.New();
labelMapper.SetInputConnection(visPts.GetOutputPort());
// labelMapper.SetInput(visPts.GetInput());
labelMapper.SetLabelModeToLabelFieldData();
vtkActor2D actor2d = vtkActor2D.New();
actor2d.SetMapper(labelMapper);
m_render.AddActor(actor2d);
}
m_render.Render();
}
/// <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);
}
}
}
}
void Test2()
{
int xmin = 0;
int xlength = 1000;
int xmax = xmin + xlength;
int ymin = 0;
int ylength = 1000;
int ymax = ymin + ylength;
#region 定义显示的rectActor
vtkPoints pts = vtkPoints.New();
pts.InsertPoint(0, xmin, ymin, 0);
pts.InsertPoint(1, xmax, ymin, 0);
pts.InsertPoint(2, xmax, ymax, 0);
pts.InsertPoint(3, xmin, ymax, 0);
vtkCellArray rect = vtkCellArray.New();
rect.InsertNextCell(5);
rect.InsertCellPoint(0);
rect.InsertCellPoint(1);
rect.InsertCellPoint(2);
rect.InsertCellPoint(3);
rect.InsertCellPoint(0);
vtkPolyData selectRect = vtkPolyData.New();
selectRect.SetPoints(pts);
selectRect.SetLines(rect);
vtkPolyDataMapper2D rectMapper = vtkPolyDataMapper2D.New();
rectMapper.SetInput(selectRect);
vtkActor2D rectActor = vtkActor2D.New();
rectActor.SetMapper(rectMapper);
#endregion
vtkSphereSource sphere = vtkSphereSource.New();
vtkPolyDataMapper sphereMapper = vtkPolyDataMapper.New();
sphereMapper.SetInputConnection(sphere.GetOutputPort());
// sphereMapper.SetImmediateModeRendering(1);
vtkActor sphereActor = vtkActor.New();
sphereActor.SetMapper(sphereMapper);
vtkIdFilter ids = vtkIdFilter.New();
ids.SetInputConnection(sphere.GetOutputPort());
ids.PointIdsOn();
ids.CellIdsOn();
ids.FieldDataOn();
#region 设置要显示的点的及其label
vtkSelectVisiblePoints visPts = vtkSelectVisiblePoints.New();
visPts.SetInputConnection(ids.GetOutputPort());
visPts.SetRenderer(m_render);
visPts.SelectionWindowOn();
visPts.SetSelection(xmin, xmin + xlength, ymin, ymin + ylength);
vtkLabeledDataMapper pointsMapper = vtkLabeledDataMapper.New();
pointsMapper.SetInputConnection(visPts.GetOutputPort());
pointsMapper.SetLabelModeToLabelFieldData();
pointsMapper.GetLabelTextProperty().SetColor(0, 255, 0);
pointsMapper.GetLabelTextProperty().BoldOff();
vtkActor2D pointLabels = vtkActor2D.New();
pointLabels.SetMapper(pointsMapper);
#endregion
#region 设置要显示的cell的id及其label
vtkCellCenters cc = vtkCellCenters.New();
cc.SetInputConnection(ids.GetOutputPort());
vtkSelectVisiblePoints visCells = vtkSelectVisiblePoints.New();
visCells.SetInputConnection(cc.GetOutputPort());
visCells.SetRenderer(m_render);
visCells.SelectionWindowOn();
visCells.SetSelection(xmin, xmin + xlength, ymin, ymin + ylength);
///显示每个Cell的id
vtkLabeledDataMapper cellMapper = vtkLabeledDataMapper.New();
cellMapper.SetInputConnection(visCells.GetOutputPort());
cellMapper.SetLabelModeToLabelFieldData();
cellMapper.GetLabelTextProperty().SetColor(255, 0, 0);
vtkActor2D cellLabels = vtkActor2D.New();
cellLabels.SetMapper(cellMapper);
#endregion
m_render.AddActor(sphereActor);
m_render.AddActor2D(rectActor);
m_render.AddActor2D(pointLabels);
// m_render.AddActor2D(cellLabels);
}