[Paraview] Simple Visualization

Thu Oct 30 13:09:02 EDT 2008

You can manually change the glyphs shape and size. It has some default
size which is probably not working well with your data. You can also
supply values with each point and have the glyphs shaped and oriented
according the the values.

On Thu, Oct 30, 2008 at 1:07 PM, David E DeMarle
<dave.demarle at kitware.com> wrote:
> On Thu, Oct 30, 2008 at 12:50 PM, Lorenzo Isella
> <lorenzo.isella at gmail.com> wrote:
>> Hello,
>> Sorry for coming back to this topic again.
>> I applied your suggestion to the example case and, as far as I can
>> say, it works.
>> However, when applied to another case (this time with 5000 particles),
>> the result is far from correct (I see a lot of coalescing sphere,
>> whereas Povray visualizes them as almost-in-touch objects, none of
>> them overlapping).
>
> Can you post images? It would help diagnose what is happening.
>
>> Hence my question: does Paraview apply any sort of automatic rescaling
>> of distances between the spheres to improve visualization?
>
> No.
>
>> I attach the text file which is giving me a hard time.
>> Many thanks
>>
>> Lorenzo
>>
>> P.S.: I see that paraview is an application having a scripting
>> language of its own (probably Python). It would be extremely useful to
>> me to know more about that in order to automate some tasks.
>> Where can I find more about it?
>>
>
> Python is a general purpose programming language. There are many books
> and online resources about it.
>
> About using Python to control paraview, take a look at the paraview
> wiki, there are pages about python scripting paraview some recent
> excellent tutorials there about what can be done with scripting.
>
> cheers,
> Dave
>
>> 2008/10/30 David E DeMarle <dave.demarle at kitware.com>:
>>> Or, try out the example of a python programmable reader that I've just
>>> posted to the wiki.
>>> http://www.paraview.org/Wiki/Here_are_some_more_examples_of_simple_ParaView_3_python_filters.
>>>
>>> To use it, open up Source->Programmable Source, set the output type to
>>> Poly Data, paste in the text, correct the filename, and in your case
>>> change the separator from "," to " ".
>>>
>>> Then apply the glyph filter. As Ken suggested.
>>>
>>>
>>> On Thu, Oct 30, 2008 at 10:10 AM, Moreland, Kenneth <kmorel at sandia.gov> wrote:
>>>> To be honest, ParaView doesn't make loading in a simple list of coordinates
>>>> as easy as it should.  It's something we will be working on in the near
>>>> future (e.g. bug #5016, http://www.paraview.org/Bug/view.php?id=5016).
>>>> However, it is still possible to do what you want, it just takes a few more
>>>> steps than it should.
>>>>
>>>> I think the easiest way to get your data into ParaView is to convert it to a
>>>> legacy VTK file.  From what you attached below, all you need to do is add
>>>> some header in front of it.  Below I have included a modified form of your
>>>> data that conforms to the legacy VTK file format (hopefully line endings are
>>>> preserved again, because they matter in the header).  Copy the data into a
>>>> file with a .vtk extension and you will be able to load it into ParaView.
>>>>
>>>> When you first load this into ParaView, you will not actually see anything
>>>> drawn.  This is because I was too lazy to add cells to the data.  However,
>>>> you can use the Glyph filter to add the exact geometry you described (a
>>>> sphere of radius 0.5).  After loading the data (don't forget to hit the
>>>> Apply button), add the Glyph filter (there is a convenient toolbar button
>>>> with an image of a large sphere covered by smaller green spheres).  Change
>>>> the "Glyph Type" to "Sphere".  The default radius happens to be 0.5, so you
>>>> are good to hit the Apply button and you should see your particles.
>>>>
>>>> Hope that helps.
>>>>
>>>> -Ken
>>>>
>>>> # vtk DataFile Version 2.0
>>>> Some example 50 particles.
>>>> ASCII
>>>> DATASET POLYDATA
>>>> POINTS 50 double
>>>> 5.488638491049999857e+01 4.533285539199999903e+01 5.990067340830000120e+01
>>>> 5.507634645640000315e+01 4.690055020359999816e+01 6.205816942250000068e+01
>>>> 5.611924302530000119e+01 4.584485860769999732e+01 6.292926739199999986e+01
>>>> 5.641759022880000174e+01 4.340893347419999770e+01 5.895382539940000299e+01
>>>> 5.693618177649999978e+01 4.489218829629999874e+01 6.410368616600000280e+01
>>>> 5.555939302830000059e+01 4.362780979029999884e+01 5.951328359800000101e+01
>>>> 5.554350617000000057e+01 4.188482518459999682e+01 5.878381606479999988e+01
>>>> 5.604427505559999645e+01 4.649609805720000111e+01 6.210705354470000117e+01
>>>> 5.530048293149999949e+01 4.624494566079999913e+01 5.959863344469999902e+01
>>>> 5.467705995490995718e+01 4.355678678950000204e+01 5.875568285069999774e+01
>>>> 5.621869458380000140e+01 4.439583221640000232e+01 5.924903889080000141e+01
>>>> 5.561998122079999973e+01 4.394605972949999995e+01 5.851489735050000007e+01
>>>> 5.690921858690000334e+01 4.582500510620000256e+01 6.362092096509999806e+01
>>>> 5.475098914309999998e+01 4.619126324740000200e+01 6.049120611730000263e+01
>>>> 5.641635311080000292e+01 4.243341419539999748e+01 5.854919389150000342e+01
>>>> 5.621830122240000094e+01 3.991548769199999924e+01 5.863887904930000161e+01
>>>> 5.719361166030000021e+01 4.174063668590000020e+01 5.835930649010000337e+01
>>>> 5.616689354599999717e+01 4.325470363480000202e+01 5.795258720969999899e+01
>>>> 5.579069489220000122e+01 4.498163925800000129e+01 5.848915900779999788e+01
>>>> 5.481830772069999824e+01 4.707179765050000242e+01 6.105822532359999855e+01
>>>> 5.564110346620000058e+01 3.912246424140000300e+01 5.901021183169999773e+01
>>>> 5.621457283520000203e+01 4.152797633419999812e+01 5.806957834979999689e+01
>>>> 5.719488688780000274e+01 3.994124700609999934e+01 5.900162063970000048e+01
>>>> 5.665532662689999910e+01 4.495426231879999790e+01 6.309290282119999915e+01
>>>> 5.580952576610000193e+01 4.721484517420000060e+01 6.137584942670000032e+01
>>>> 5.561332834329999741e+01 4.679007541709999884e+01 6.043663970149999898e+01
>>>> 5.518545746840000277e+01 4.457136614680000264e+01 5.923679874550000335e+01
>>>> 5.647997341979999675e+01 4.154384547210000278e+01 5.909534597060000038e+01
>>>> 5.765199147479999908e+01 4.512795159830000102e+01 6.337497765989999721e+01
>>>> 5.584302705049999815e+01 4.535378866500000328e+01 5.946951471839999925e+01
>>>> 5.562396915850000312e+01 4.236937535799999921e+01 5.785716254439999773e+01
>>>> 5.551942573040000184e+01 4.293100157170000131e+01 5.873180053770000342e+01
>>>> 5.536439253620000045e+01 4.586432050150000350e+01 6.446544382109999560e+01
>>>> 5.601580874620000117e+01 4.532177775110000084e+01 6.383980378760995222e+01
>>>> 5.522183270229999863e+01 4.591330843859999788e+01 6.239036235070000203e+01
>>>> 5.552475736130995188e+01 4.671884746799999988e+01 6.299182048400000156e+01
>>>> 5.569300298889999823e+01 4.574124821929999740e+01 6.043186792259999862e+01
>>>> 5.505789659319999885e+01 4.672642824350000268e+01 6.394446345749999949e+01
>>>> 5.647888952489999781e+01 4.055610006399999889e+01 5.944827188789999894e+01
>>>> 5.512435615700000113e+01 4.330096744890000338e+01 5.784002608130000311e+01
>>>> 5.587834371390000143e+01 4.749533078369999828e+01 6.238585686929999952e+01
>>>> 5.554561466909999723e+01 4.008492034519999692e+01 5.941969696160000325e+01
>>>> 5.513332295810000261e+01 4.791230244629999646e+01 6.177737797679999687e+01
>>>> 5.680377349180000124e+01 4.076690689720000194e+01 5.847625241530000295e+01
>>>> 5.520251321359999963e+01 4.582912735579999719e+01 6.343219189789999746e+01
>>>> 5.499600962339999910e+01 4.554144637859999989e+01 5.888039144079999687e+01
>>>> 5.577575750479999783e+01 4.085686345740000291e+01 5.873738147630000128e+01
>>>> 5.603135377430000119e+01 4.636511701490000092e+01 6.383143826789999764e+01
>>>> 5.642135364429999811e+01 3.952228659610000250e+01 5.958435845870000236e+01
>>>> 5.541103635689999862e+01 4.624251213800000215e+01 6.131094504189999839e+01
>>>>
>>>>
>>>>
>>>> On 10/30/08 5:47 AM, "Lorenzo Isella" <lorenzo.isella at gmail.com> wrote:
>>>>
>>>>> Dear All,
>>>>> I am a complete newbie in visualization, so an apology in advance is
>>>>> what I ask will sound trivial.
>>>>> I am browsing several Paraview tutorials, but I am missing out what I
>>>>> really need.
>>>>> Right now, I do NOT need e.g. to plot a temperature field on a metal
>>>>> slab with a non-trivial geometry. Rather, I have a set of particles
>>>>> (each is a simple sphere) in a 3D-box. The raw data is an ascii file
>>>>> of the form:
>>>>>
>>>>> x_1  y_1  z_1
>>>>> x_2  y_2  z_2
>>>>> .............
>>>>> x_N  y_N  z_N
>>>>>
>>>>> In each position {x_i,y_i,z_i} there is a sphere having radius 0.5.
>>>>> Hence I do not have a grid but only a list of positions of some
>>>>> spheres in space.
>>>>> How should I deal with that in Paraview? Which format should I convert
>>>>> my ascii file to?
>>>>> In case it turns out to be useful to fix the ideas, I paste below an
>>>>> example case with 50 particles (each line should contain three
>>>>> numbers, but I do not know how it will be shown by your email client).
>>>>> Many thanks
>>>>>
>>>>> Lorenzo
>>>>>
>>>>> 5.488638491049999857e+01 4.533285539199999903e+01 5.990067340830000120e+01
>>>>> 5.507634645640000315e+01 4.690055020359999816e+01 6.205816942250000068e+01
>>>>> 5.611924302530000119e+01 4.584485860769999732e+01 6.292926739199999986e+01
>>>>> 5.641759022880000174e+01 4.340893347419999770e+01 5.895382539940000299e+01
>>>>> 5.693618177649999978e+01 4.489218829629999874e+01 6.410368616600000280e+01
>>>>> 5.555939302830000059e+01 4.362780979029999884e+01 5.951328359800000101e+01
>>>>> 5.554350617000000057e+01 4.188482518459999682e+01 5.878381606479999988e+01
>>>>> 5.604427505559999645e+01 4.649609805720000111e+01 6.210705354470000117e+01
>>>>> 5.530048293149999949e+01 4.624494566079999913e+01 5.959863344469999902e+01
>>>>> 5.467705995490995718e+01 4.355678678950000204e+01 5.875568285069999774e+01
>>>>> 5.621869458380000140e+01 4.439583221640000232e+01 5.924903889080000141e+01
>>>>> 5.561998122079999973e+01 4.394605972949999995e+01 5.851489735050000007e+01
>>>>> 5.690921858690000334e+01 4.582500510620000256e+01 6.362092096509999806e+01
>>>>> 5.475098914309999998e+01 4.619126324740000200e+01 6.049120611730000263e+01
>>>>> 5.641635311080000292e+01 4.243341419539999748e+01 5.854919389150000342e+01
>>>>> 5.621830122240000094e+01 3.991548769199999924e+01 5.863887904930000161e+01
>>>>> 5.719361166030000021e+01 4.174063668590000020e+01 5.835930649010000337e+01
>>>>> 5.616689354599999717e+01 4.325470363480000202e+01 5.795258720969999899e+01
>>>>> 5.579069489220000122e+01 4.498163925800000129e+01 5.848915900779999788e+01
>>>>> 5.481830772069999824e+01 4.707179765050000242e+01 6.105822532359999855e+01
>>>>> 5.564110346620000058e+01 3.912246424140000300e+01 5.901021183169999773e+01
>>>>> 5.621457283520000203e+01 4.152797633419999812e+01 5.806957834979999689e+01
>>>>> 5.719488688780000274e+01 3.994124700609999934e+01 5.900162063970000048e+01
>>>>> 5.665532662689999910e+01 4.495426231879999790e+01 6.309290282119999915e+01
>>>>> 5.580952576610000193e+01 4.721484517420000060e+01 6.137584942670000032e+01
>>>>> 5.561332834329999741e+01 4.679007541709999884e+01 6.043663970149999898e+01
>>>>> 5.518545746840000277e+01 4.457136614680000264e+01 5.923679874550000335e+01
>>>>> 5.647997341979999675e+01 4.154384547210000278e+01 5.909534597060000038e+01
>>>>> 5.765199147479999908e+01 4.512795159830000102e+01 6.337497765989999721e+01
>>>>> 5.584302705049999815e+01 4.535378866500000328e+01 5.946951471839999925e+01
>>>>> 5.562396915850000312e+01 4.236937535799999921e+01 5.785716254439999773e+01
>>>>> 5.551942573040000184e+01 4.293100157170000131e+01 5.873180053770000342e+01
>>>>> 5.536439253620000045e+01 4.586432050150000350e+01 6.446544382109999560e+01
>>>>> 5.601580874620000117e+01 4.532177775110000084e+01 6.383980378760995222e+01
>>>>> 5.522183270229999863e+01 4.591330843859999788e+01 6.239036235070000203e+01
>>>>> 5.552475736130995188e+01 4.671884746799999988e+01 6.299182048400000156e+01
>>>>> 5.569300298889999823e+01 4.574124821929999740e+01 6.043186792259999862e+01
>>>>> 5.505789659319999885e+01 4.672642824350000268e+01 6.394446345749999949e+01
>>>>> 5.647888952489999781e+01 4.055610006399999889e+01 5.944827188789999894e+01
>>>>> 5.512435615700000113e+01 4.330096744890000338e+01 5.784002608130000311e+01
>>>>> 5.587834371390000143e+01 4.749533078369999828e+01 6.238585686929999952e+01
>>>>> 5.554561466909999723e+01 4.008492034519999692e+01 5.941969696160000325e+01
>>>>> 5.513332295810000261e+01 4.791230244629999646e+01 6.177737797679999687e+01
>>>>> 5.680377349180000124e+01 4.076690689720000194e+01 5.847625241530000295e+01
>>>>> 5.520251321359999963e+01 4.582912735579999719e+01 6.343219189789999746e+01
>>>>> 5.499600962339999910e+01 4.554144637859999989e+01 5.888039144079999687e+01
>>>>> 5.577575750479999783e+01 4.085686345740000291e+01 5.873738147630000128e+01
>>>>> 5.603135377430000119e+01 4.636511701490000092e+01 6.383143826789999764e+01
>>>>> 5.642135364429999811e+01 3.952228659610000250e+01 5.958435845870000236e+01
>>>>> 5.541103635689999862e+01 4.624251213800000215e+01 6.131094504189999839e+01
>>>>> _______________________________________________
>>>>> ParaView mailing list
>>>>> ParaView at paraview.org
>>>>> http://www.paraview.org/mailman/listinfo/paraview
>>>>>
>>>>>
>>>>
>>>>
>>>>   ****      Kenneth Moreland
>>>>    ***      Sandia National Laboratories
>>>> ***********
>>>> *** *** ***  email: kmorel at sandia.gov
>>>> **  ***  **  phone: (505) 844-8919
>>>>    ***      fax:   (505) 845-0833
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> ParaView mailing list
>>>> ParaView at paraview.org
>>>> http://www.paraview.org/mailman/listinfo/paraview
>>>>
>>>
>>>
>>>
>>> --
>>> David E DeMarle
>>> Kitware, Inc.
>>> R&D Engineer
>>> 28 Corporate Drive
>>> Clifton Park, NY 12065-8662
>>> Phone: 518-371-3971 x109
>>>
>>
>>
>>
>> --
>> Free will does not consist in inverting the river flow, but in being
>> the fish that leaps upstream.
>>
>
>
>
> --
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>

-- 
David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109