[vtkusers] Re: vtkusers digest, Vol 1 #1024 - 6 msgs

Chuan-Chu Kuo \(郭川竹\) d8843006 at ccunix.ccu.edu.tw
Mon May 20 08:26:40 EDT 2002


收到,謝謝。

川竹


----- Original Message -----
From: <vtkusers-request at public.kitware.com>
To: <vtkusers at public.kitware.com>
Sent: Monday, May 20, 2002 6:44 PM
Subject: vtkusers digest, Vol 1 #1024 - 6 msgs


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> Today's Topics:
>
>    1. problem with vtkScalarBarActor (=?iso-8859-1?q?Stephane=20Lemaire?=)
>    2. Re: comparing polydata objects.. (David Pont)
>    3. 3D Texture Mapping (Sedat DOGAN2)
>    4. Re: Overlay graphics problem? (Malcolm Drummond)
>    5. RE: VRML (Gopalakrishnan, Gowri)
>    6. MFC + VTK (Giancarlo Amati)
>
> --__--__--
>
> Message: 1
> Date: Sun, 19 May 2002 21:20:26 +0200 (CEST)
> From: =?iso-8859-1?q?Stephane=20Lemaire?= <stephanelemairefr at yahoo.fr>
> To: vtkusers at public.kitware.com
> Subject: [vtkusers] problem with vtkScalarBarActor
>
> Hello everyone,
>
> When I'm trying to display a scalar bar with
> vtkScalarBarActor, I'm able to get the bar but without
> any text.
>
> Any idea of what's going wrong ?
>
> Stephane.
>
> ___________________________________________________________
> Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en fran蓷is !
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> --__--__--
>
> Message: 2
> From: "David Pont" <david_pont at hotmail.com>
> To: krs at cs.uncc.edu, vtkusers at public.kitware.com
> Subject: Re: [vtkusers] comparing polydata objects..
> Date: Mon, 20 May 2002 09:31:46 +1200
>
> <html><div style='background-color:'><DIV>
> <P>Hi krs,</P>
> <P>&nbsp; I have a class that will let treat polydata (your isosurface?)
as an implicit function, so you could use it to&nbsp;clip or cut. You could
also use ImplicitBoolean to&nbsp;get union, intersection, difference etc
between the two surfaces. If you are interested I can send you the C++
source.</P>
> <P>&nbsp; regards</P>
> <P>&nbsp;&nbsp;&nbsp; Dave Pont<BR><BR></P></DIV>
> <DIV></DIV>
> <DIV></DIV>&gt;From: "K.R.Subramanian" <KRS at CS.UNCC.EDU>
> <DIV></DIV>&gt;To: VTK HELP <VTKUSERS at PUBLIC.KITWARE.COM>
> <DIV></DIV>&gt;Subject: [vtkusers] comparing polydata objects..
> <DIV></DIV>&gt;Date: Sat, 18 May 2002 12:25:55 -0400
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;I am interesting in calculating the volume intercepted by
an isosurface with each cell
> <DIV></DIV>&gt;it intersects in a grid. In other words, the isosurface is
like an implicit function
> <DIV></DIV>&gt;(cutter).
> <DIV></DIV>&gt;What is an efficient way to do this? My bigger problem is
to compare two different
> <DIV></DIV>&gt;isosurfaces in terms of these fractional volumes compueted
at each of these grid cells.
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;Thanks.
> <DIV></DIV>&gt;
> <DIV></DIV>&gt; -- krs
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;--
> <DIV></DIV>&gt;K.R.Subramanian Phone: (704) 687-4872
> <DIV></DIV>&gt;Department of Computer Science FAX: (704) 687-4893
> <DIV></DIV>&gt;UNC Charlotte, CARC 311 Email: krs at cs.uncc.edu
> <DIV></DIV>&gt;Charlotte, NC 28223-0001 Web: http://www.cs.uncc.edu/~krs
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;
> <DIV></DIV>&gt;_______________________________________________
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> --__--__--
>
> Message: 3
> Reply-To: "Sedat DOGAN2" <d_sedat at hotmail.com>
> From: "Sedat DOGAN2" <d_sedat at hotmail.com>
> To: <vtkusers at public.kitware.com>
> Date: Mon, 20 May 2002 00:31:52 +0300
> Subject: [vtkusers] 3D Texture Mapping
>
> Dear friends,
> I want to render my polygonal data with 3D texture mapping. I know that
vtk
> doesn't support 3D texture mapping. And I don't have a 3D texture mapping
> hardware either. But for my studies, I should solve this problem. In order
> to solve this problem I think to do the following things. Please if you
> could tell me if my following thoughts solve this problem. I will do the
> followings:
> 1- I'll compute the 3D world coordinates of my textures.For this purpose
> I'll use real photograps taken with oriented cameras with photogrammetric
> methods.
> 2- After I have computed 3D coordinates of the textures, I'll assign these
> textures to the vertexes of my polygonal data according to the coordinates
> one by one with a C program fuction which I'll write.(In order to
quarentee
> one to one correspondence between vertexes and the textures, I'll make
> backward mapping. As in the resampling problems.).
> 3- In order to render polygonal data, I'll use the method "color with
> sclars" of the polydata.
>
> Now, I wonder that: Is the final rendered polydata seen as it was texture
> mapped? I.e. how is the final polydaya seen?
> I didn't try this. Because this implementation will take very long time.
And
> if this approach can't be succesfull, I will loose very much time. But
> I'don't have much time to solve this problem. So if you can give me ideas
> about my above thoughts, I'll be very happy.
>
> Thanks in advance.
> Best Regards.
> Sedat Dogan.
>
>
> --__--__--
>
> Message: 4
> From: "Malcolm Drummond" <malcolm at geovision.co.za>
> To: "vtkusers" <vtkusers at public.kitware.com>
> Subject: Re: [vtkusers] Overlay graphics problem?
> Date: Sun, 19 May 2002 23:58:11 +0200
> Organization: GeoVision
>
> Confirmed
>
> My laptop has an ATI Rage Pro and exhibits the same prb. I tried
> drawMesh.tcl in the imaging library. When camera is looking directly down
> over the pole, the overlay disappears. It reappears if I zoom in a bit.
> Seems as if it's getting confused about depth.
>
> Malcolm Drummond
> GeoVision cc
>
> ----- Original Message -----
> From: Pan, Tony C (Research) <tpan at crd.ge.com>
> To: vtk mailing list <vtkusers at public.kitware.com>
> Sent: Friday, May 17, 2002 7:42 PM
> Subject: [vtkusers] Overlay graphics problem?
>
>
> > Hi,
> > I have a tcl application that displays an image, and has mouse
interaction
> to allow user to draw a
> > region of interest on top of the image.  I am using a polydata to
contain
> a square for this purpose,
> > and the square is added to the renderer as an Actor2D.  This is a VTK
4.0
> application.
> >
> > My problem is that with my desktop, which has an ATI Rage Pro integrated
> graphics chip, the box does
> > not render. TextActors and the image do render okay.  I suspect this is
> related to the graphics
> > hardware, since a test on ATI fireGL worked fine.  Can someone please
> confirm this, and/or offer
> > potential workarounds?
> >
> > Thank you.
> >
> > Tony Pan
> > _______________________________________________
> > This is the private VTK discussion list.
> > Please keep messages on-topic. Check the FAQ at:
> <http://public.kitware.com/cgi-bin/vtkfaq>
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> >
>
>
> --__--__--
>
> Message: 5
> From: "Gopalakrishnan, Gowri" <Gowri.Gopalakrishnan at inteq.com>
> To: "'Tom Citriniti'" <citrit at rpi.edu>,
> alexandre gouaillard <alexandre.gouaillard at insa-lyon.fr>,
> vtkusers at public.kitware.com
> Subject: RE: [vtkusers] VRML
> Date: Mon, 20 May 2002 03:10:22 -0500
>
> I have been posting now and then about it and I have not checked if vtk4.0
> has this feature. Even though vtk has a VRMLimport export feature, very
> often when you export/import not all the features are correct. For example
> Exporting vtk to vrml all the colors don't appear. The same was the issue
> with 3ds import.....Sometimes wireframes appear as solid etc...
>
> I would like to know if any of these features have been improved in
vtk4.0?.
> Or is there any place to enter this as a bug report?.
>
> Regards
> Gowri
>
>
> --__--__--
>
> Message: 6
> Date: Mon, 20 May 2002 10:37:55 +0200 (CEST)
> From: Giancarlo Amati <amati at ira.cnr.it>
> To: vtkusers at public.kitware.com
> Subject: [vtkusers] MFC + VTK
>
> Hello everybody,
>
> where can I find a tutorial relative the use of MFV with VTK?
>
> Thank you for the help.
>
> Best Regards
> Giancarlo
>
> --
> ----------------------------------------
> dott. Giancarlo Amati                  |
> (amati at ira.cnr.it)                     |
>                                        |
> National Research Council              |
> RadioAstronomical Institute            |
> office phone n. +39 051 6399405        |
> via Gobetti 101 - Bologna (Italy)      |
> ----------------------------------------
>
>
>
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