[vtkusers] How to get vtk file from scattered points?

[Dominik Szczerba]

Please stick to the list unless sending me sensitive datasets etc.
I have been succesful reading in raw points as an unstructured grid with 
cells being literally points (ID=1 AFAIK but check me in the format 
techdoc paper). You can either prepare a vtk file that you normally load 
into vtk or just read a data file from your program and create an 
appropriate structure yourself. the Ensight format for reading particles 
will also work.
--DS

ya ya wrote:
> Thanks for your reply. But if I want to see the whole terrian, including 
> the inside part, not only the surface( because I want to do the 
> visualization such as clipping etc.), how can I deal with it? These days 
> I learned a class of vtkProbeFilter. I used the class according to the 
> user guide, and now I have used the vtkProbefilter,but when I use such 
> probefilter, i used unstructred cells as source and use image data as 
> input ,then i can get structured points as outputs, but it can't met my 
> need. I want know, how can i get image data or structure points data,if 
> i only have scatter points .pls help me,Tks.
> 
> 
>> From: Dominik Szczerba <domi at vision.ee.ethz.ch>
>> To: ya ya <yaya_aisi at hotmail.com>
>> CC: vtkusers at vtk.org, goldenrod at 263.net
>> Subject: Re: [vtkusers] How to get vtk file from scattered points?
>> Date: Thu, 28 Sep 2006 15:22:18 +0200
>>
>> if you only have points and want to see the surface you can try alpha 
>> shapes, see the tetrahydralization class. a comprehensive description 
>> of the vtk formats is to be found somewhere on the vtk.org web page 
>> (under technical documents I believe).
>> --DS
>>
>> ya ya wrote:
>>> I just begin to learn vtk. Now something about the file format beats me.
>>> Recently I've learned the format of the vtk files, for example, 
>>> vtkImageData, vtkPolyData, vtkUnstructuredGrid etc. in the vtk 
>>> Userguide. But I wonder how I can gain such kinds of format? If I 
>>> want to create a terrian and I've got many scattered points in the 
>>> form of coordinate, what should I do next? Do I have to change the 
>>> format into vtk file format? If so, how can I change the format?  
>>> Please give me some help, thank you!
>>>
>>>
>>>                                                                    
>>>               Ivy
>>>
>>> _________________________________________________________________
>>> 涓庤仈鏈虹殑鏈嬪弸杩涜浜ゆ祦锛岃浣跨敤 MSN Messenger:  
>>> http://messenger.msn.com/cn 
>>> _______________________________________________
>>> This is the private VTK discussion list. Please keep messages 
>>> on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>>> Follow this link to subscribe/unsubscribe:
>>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>> -- 
>> Dominik Szczerba, Ph.D.
>> Computer Vision Lab CH-8092 Zurich
>> http://www.vision.ee.ethz.ch/~domi
> 
> _________________________________________________________________
> 免费下载 MSN Explorer:   http://explorer.msn.com/lccn/ 

-- 
Dominik Szczerba, Ph.D.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi