<div dir="ltr">So, is there any way to create a hexahedra of shell type?<br><br>Thanks,<br><br>Jothy<br><br><div class="gmail_quote">On Tue, May 18, 2010 at 5:23 PM, Bill Lorensen <span dir="ltr"><<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">The hexahedra is a solid. The sphere and cube are "shells". When you<br>
cut the hexahedra you will get interior faces because it is solid.<br>
When you cut the sphere and cube you do not get interior faces because<br>
they are "shells".<br>
<div><div></div><div class="h5"><br>
On Tue, May 18, 2010 at 11:48 AM, Jothy <<a href="mailto:jothybasu@gmail.com">jothybasu@gmail.com</a>> wrote:<br>
> I have a beam passing through the vtkImageData.While I scroll through the<br>
> ImageData it should cut the beam and display it over the imagedata. Please<br>
> see the screenshot.Its simply a beam from the x-ray machine.<br>
><br>
> I was able to cut spheresource and cube source and able to get contours with<br>
> out this diagonals. But when I try to create it with hexahedron it becomes<br>
> like this.<br>
><br>
> Thanks,<br>
><br>
> Jothy<br>
><br>
><br>
><br>
> On Tue, May 18, 2010 at 3:56 PM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
> wrote:<br>
>><br>
>> If you don't clip it, you will not see the interior.<br>
>><br>
>> I am still confused about what you are trying to do.<br>
>><br>
>><br>
>> On Tue, May 18, 2010 at 10:41 AM, Jothy <<a href="mailto:jothybasu@gmail.com">jothybasu@gmail.com</a>> wrote:<br>
>> > I have tried it earlier. It works fine when you display it as surface.<br>
>> > But I<br>
>> > want to display it as a wireframe , I mean only the outline.So that you<br>
>> > can<br>
>> > see the dose values and ROIs properly.<br>
>> ><br>
>> > (I wonder, there must be someone on the list from the planning system<br>
>> > developers, but they keep their mouth tight!).<br>
>> ><br>
>> > Thanks,<br>
>> ><br>
>> > Jothy<br>
>> ><br>
>> > On Tue, May 18, 2010 at 3:26 PM, Scott Johnson<br>
>> > <<a href="mailto:Scott.Johnson@neuwave.com">Scott.Johnson@neuwave.com</a>><br>
>> > wrote:<br>
>> >><br>
>> >> Hello Jothy,<br>
>> >><br>
>> >><br>
>> >><br>
>> >> It looks like the plane is being rendered as wireframe. Try rendering<br>
>> >> it<br>
>> >> as a semi-transparent surface to see if it goes away. I’m not sure how<br>
>> >> to<br>
>> >> get just the outline.<br>
>> >><br>
>> >><br>
>> >><br>
>> >> -- Scott<br>
>> >><br>
>> >><br>
>> >><br>
>> >> From: <a href="mailto:vtkusers-bounces@vtk.org">vtkusers-bounces@vtk.org</a> [mailto:<a href="mailto:vtkusers-bounces@vtk.org">vtkusers-bounces@vtk.org</a>] On<br>
>> >> Behalf<br>
>> >> Of Jothy<br>
>> >> Sent: Tuesday, May 18, 2010 5:15 AM<br>
>> >> To: David Doria<br>
>> >> Cc: VTK<br>
>> >> Subject: Re: [vtkusers] How to create a cube with vtkPolyData<br>
>> >><br>
>> >><br>
>> >><br>
>> >> Screenshot is here!<br>
>> >><br>
>> >><br>
>> >> On Tue, May 18, 2010 at 11:12 AM, Jothy <<a href="mailto:jothybasu@gmail.com">jothybasu@gmail.com</a>> wrote:<br>
>> >><br>
>> >> Hi David,<br>
>> >><br>
>> >> I tried the vtkHexahedron example. But, when I try to cut this I get a<br>
>> >> line across the cut plane . see the screenshot and also the code.<br>
>> >><br>
>> >> Could you please figure it out?<br>
>> >><br>
>> >> from vtk import*<br>
>> >><br>
>> >><br>
>> >> #Setup the coordinates of eight points<br>
>> >> #(the two faces must be in counter clockwise order as viewd from the<br>
>> >> outside)<br>
>> >> P0 = [0.0, 0.0, 0.0];<br>
>> >> P1 = [1.0, 0.0, 0.0];<br>
>> >> P2 = [1.0, 1.0, 0.0];<br>
>> >> P3 = [0.0, 1.0, 0.0];<br>
>> >> P4 = [0.0, 0.0, 1.0];<br>
>> >> P5 = [1.0, 0.0, 1.0];<br>
>> >> P6 = [1.0, 1.0, 1.0];<br>
>> >> P7 = [0.0, 1.0, 1.0];<br>
>> >><br>
>> >><br>
>> >> #Create the points<br>
>> >> points = vtkPoints();<br>
>> >> points.InsertNextPoint(P0);<br>
>> >> points.InsertNextPoint(P1);<br>
>> >> points.InsertNextPoint(P2);<br>
>> >> points.InsertNextPoint(P3);<br>
>> >> points.InsertNextPoint(P4);<br>
>> >> points.InsertNextPoint(P5);<br>
>> >> points.InsertNextPoint(P6);<br>
>> >> points.InsertNextPoint(P7);<br>
>> >><br>
>> >> #Create a hexahedron from the points<br>
>> >> hexa = vtkHexahedron();<br>
>> >> hexa.GetPointIds().SetId(0,0);<br>
>> >> hexa.GetPointIds().SetId(1,1);<br>
>> >> hexa.GetPointIds().SetId(2,2);<br>
>> >> hexa.GetPointIds().SetId(3,3);<br>
>> >> hexa.GetPointIds().SetId(4,4);<br>
>> >> hexa.GetPointIds().SetId(5,5);<br>
>> >> hexa.GetPointIds().SetId(6,6);<br>
>> >> hexa.GetPointIds().SetId(7,7);<br>
>> >><br>
>> >> #Add the hexahedron to a cell array<br>
>> >> hexs = vtkCellArray();<br>
>> >> hexs.InsertNextCell(hexa);<br>
>> >><br>
>> >> #Add the points and hexahedron to an unstructured grid<br>
>> >> uGrid =vtkUnstructuredGrid();<br>
>> >> uGrid.SetPoints(points);<br>
>> >> uGrid.InsertNextCell(hexa.GetCellType(), hexa.GetPointIds());<br>
>> >> aBeamMapper = vtkDataSetMapper()<br>
>> >> aBeamMapper.SetInput(uGrid)<br>
>> >> aBeamActor = vtkActor()<br>
>> >> aBeamActor.SetMapper(aBeamMapper)<br>
>> >> aBeamActor.AddPosition(0,0,0)<br>
>> >> aBeamActor.GetProperty().SetColor(1,1,0)<br>
>> >> aBeamActor.GetProperty().SetOpacity(0.60)<br>
>> >> aBeamActor.GetProperty().EdgeVisibilityOn()<br>
>> >> aBeamActor.GetProperty().SetEdgeColor(1,1,1)<br>
>> >> aBeamActor.GetProperty().SetLineWidth(1.5)<br>
>> >><br>
>> >> #create a plane to cut,here it cuts in the XZ direction (xz<br>
>> >> normal=(1,0,0);XY =(0,0,1),YZ =(0,1,0)<br>
>> >> plane=vtkPlane()<br>
>> >> plane.SetOrigin(0.5,0,0)<br>
>> >> plane.SetNormal(1,0,0)<br>
>> >><br>
>> >> #create cutter<br>
>> >> cutter=vtkCutter()<br>
>> >> cutter.SetCutFunction(plane)<br>
>> >> cutter.SetInput(aBeamActor.GetMapper().GetInput())<br>
>> >> cutter.Update()<br>
>> >> cutterMapper=vtkPolyDataMapper()<br>
>> >> cutterMapper.SetInputConnection( cutter.GetOutputPort())<br>
>> >><br>
>> >> #create plane actor<br>
>> >> planeActor=vtkActor()<br>
>> >> planeActor.GetProperty().SetColor(1,0.5,0.5)<br>
>> >> planeActor.GetProperty().SetLineWidth(2)<br>
>> >> planeActor.SetMapper(cutterMapper)<br>
>> >><br>
>> >> # Setup a renderer, render window, and interactor<br>
>> >> renderer = vtkRenderer()<br>
>> >> renderWindow = vtkRenderWindow()<br>
>> >> #renderWindow.SetWindowName("Test")<br>
>> >><br>
>> >> renderWindow.AddRenderer(renderer);<br>
>> >> renderWindowInteractor = vtkRenderWindowInteractor()<br>
>> >> renderWindowInteractor.SetRenderWindow(renderWindow)<br>
>> >><br>
>> >> #Add the actor to the scene<br>
>> >> renderer.AddActor(aBeamActor)<br>
>> >> renderer.AddActor(planeActor)<br>
>> >> renderer.SetBackground(0,0,0) # Background color white<br>
>> >><br>
>> >> #Render and interact<br>
>> >> renderWindow.Render()<br>
>> >><br>
>> >><br>
>> >> I think it has be passed through a filter. But what it's that??<br>
>> >><br>
>> >> Thanks,<br>
>> >><br>
>> >> Jothy<br>
>> >><br>
>> >><br>
>> >> On Mon, May 17, 2010 at 10:08 PM, David Doria<br>
>> >> <<a href="mailto:daviddoria%2Bvtk@gmail.com">daviddoria+vtk@gmail.com</a>><br>
>> >> wrote:<br>
>> >> > On Mon, May 17, 2010 at 5:03 PM, Jothy <<a href="mailto:jothybasu@gmail.com">jothybasu@gmail.com</a>> wrote:<br>
>> >> >> Hi all,<br>
>> >> >><br>
>> >> >> I want to create a hexahedron using vtkPolyData. I think there is no<br>
>> >> >> example in wiki. I created it with a vtkHexaHedron but when I cut it<br>
>> >> >> it produces a line across the cut section.I don't want this. I am<br>
>> >> >> not<br>
>> >> >> able to solve this problem for many months.I used it passing through<br>
>> >> >> vtkstripper, vtkTriangle. Finally found that only if the input is of<br>
>> >> >> vtkPolyData, cutter will not produce that line across the cut<br>
>> >> >> section.<br>
>> >> >> Can some with kind enough :), add an example of how to create cube<br>
>> >> >> or<br>
>> >> >> cone with vtkPoldata.<br>
>> >> >><br>
>> >> >> Many thanks,<br>
>> >> >><br>
>> >> >> Jothy<br>
>> >> ><br>
>> >> > I don't really understand your question. The title and your last<br>
>> >> > sentence talk about cubes and cones<br>
>> >> ><br>
>> >> > <a href="http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Cube" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Cube</a><br>
>> >> > <a href="http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Display/Cone" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Display/Cone</a><br>
>> >> ><br>
>> >> > but the beginning talks about hexahedrons<br>
>> >> ><br>
>> >> > <a href="http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Hexahedron" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/GeometricObjects/Hexahedron</a><br>
>> >> ><br>
>> >> > Let us know if these links do not help.<br>
>> >> ><br>
>> >> > David<br>
>> >> ><br>
>> >><br>
>> >><br>
>> ><br>
>> > _______________________________________________<br>
>> > Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
>> ><br>
>> > Visit other Kitware open-source projects at<br>
>> > <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
>> ><br>
>> > Please keep messages on-topic and check the VTK FAQ at:<br>
>> > <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
>> ><br>
>> > Follow this link to subscribe/unsubscribe:<br>
>> > <a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
>> ><br>
>> ><br>
><br>
><br>
</div></div></blockquote></div><br></div>