[Paraview] one 3d model transparent color + one 3d model normal color for vrml

Tue Jun 12 13:43:21 EDT 2012

VTK format is not storing rendering information, but only data. In
VRML it is different. I believe it's a bug of the VRML exporter of VTK
(or it was not a feature of that exporter).

Therefore, the only solution that I see is to either fix the bug or
change the opacity attribute in the VRML file manually.

Seb

On Tue, Jun 12, 2012 at 1:33 PM, Chris <chris.schweighofer at gmx.net> wrote:
> Hello Sebastien,
>
> thank you very much, I just realized that I can change the color if I click on the solid button.  For the style options like opacity I tried it to but it does not work to save these parameters neither with vtk nor with vrml files.
> Is there a trick how I can save them?
> What further possibility exists to modify simple the vrml file for opacity?
>
> Thx,
> Chris
>> Hello Chris,
>>
>> I don't understand how you can't choose any color that you want.
>> Basically on my Mac, I have access to the 16 Billions choices... Do
>> you need more ?
>> For the opacity, scroll down in the display tab and change the opacity slider.
>>
>> For the opacity in VRML, I don't know, but I think that should be the
>> case ? If not, you can simply fix the generated VRML.
>>
>> Seb
>>
>> On Tue, Jun 12, 2012 at 11:38 AM, Chris <chris.schweighofer at gmx.net> wrote:
>>> Hello Sebastien,
>>>
>>> thx for your help. You are right it works great with a solid color. I only would like to have a bigger selection for them. Cann´t I take a color table? Or can I import colors?
>>> I tried to add a scalar but the scalar disappears  after the export.
>>> Is there a opportunity to save the opacity as well in the vrml file?
>>>
>>> Have a good day,
>>> Chris
>>>
>>>> What you try to do is the most complex solution, in the case you
>>>> really need a single mesh node inside your VRML file.
>>>> If you don't need that, then the actions are load the files, set
>>>> colors, export and done.
>>>>
>>>> Seb
>>>>
>>>> Action 1: In the menu: File > Open + In the "Properties" tab click on "Apply
>>>> Action 2: To change the color, go in the "Display" tab and click on
>>>> "Color by" = "Solid Color", the "Set Solid Color..." => The color
>>>> apply to the object that is selected in the pipeline browser.
>>>> Action 3: In the menu: File > Export + choose the VRML format and you
>>>> should be done...
>>>>
>>>> On Mon, Jun 11, 2012 at 6:31 PM, Chris <chris.schweighofer at gmx.net> wrote:
>>>>> Thx, I think it would be great in the way you described it. But I am still a
>>>>> beginner in Paraview and therefore it sounds a bit complicated for me.
>>>>>
>>>>> I added the color filter, selected color by scalars and pressed the button
>>>>> edit color map. There I tried to adjust range, scalars, lookup tables (color
>>>>> space) and the opacity.
>>>>> Anyway the scalar does not change and still stays the same. I tried it now
>>>>> 50 times.
>>>>>
>>>>> I would be really happy, if you could tell me what I did wrong?
>>>>>
>>>>> Chris
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> What I try to say, is if you load all the files in ParaView and export
>>>>> the scene as VRML you will have a single VRML file the way you want.
>>>>> So I'm not sure why this solution doesn't fit your needs.
>>>>>
>>>>> Seb
>>>>>
>>>>> On Mon, Jun 11, 2012 at 1:51 PM, Christoph Schweigi
>>>>> <chris.schweighofer at gmx.net> wrote:
>>>>>
>>>>> Thx, I want to fuse two structures of radiologic datasets. Both are from
>>>>> brain vessels. The embeded model is the fluidic pattern (solid color) and
>>>>> the other outer model is the morphology (transparent with less opacity) one.
>>>>>
>>>>>
>>>>> Thx,
>>>>>
>>>>> Chris
>>>>>
>>>>> Ps: I am currently texting from my phone but if u want I can give u
>>>>> afterwards a link with the datasets?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Am 11.06.2012 um 19:37 schrieb Sebastien Jourdain
>>>>> <sebastien.jourdain at kitware.com>:
>>>>>
>>>>>
>>>>> That's the tricker part, because your scalar + the lookup table will
>>>>>
>>>>> determine the color.
>>>>>
>>>>> That's also the reason why I asked you why you just export your scene
>>>>>
>>>>> in VRML with the correct settings color+opacity of all you objects ?
>>>>>
>>>>>
>>>>> Do you need them to be defined as a single mesh inside the VRML ?
>>>>>
>>>>>
>>>>> Seb
>>>>>
>>>>>
>>>>> On Mon, Jun 11, 2012 at 1:29 PM, Christoph Schweigi
>>>>>
>>>>> <chris.schweighofer at gmx.net> wrote:
>>>>>
>>>>> Hello Sebastien,
>>>>>
>>>>>
>>>>> Thx for the answer, but how could I add a color to each model if I merge it?
>>>>> Furthermore how could I make one model transparent and one a solid color?
>>>>>
>>>>>
>>>>> Thx, Chris
>>>>>
>>>>>
>>>>> Von meinem iPhone gesendet
>>>>>
>>>>>
>>>>> Am 11.06.2012 um 19:21 schrieb Sebastien Jourdain
>>>>> <sebastien.jourdain at kitware.com>:
>>>>>
>>>>>
>>>>> It seems that on of your dataset is a multi block. So before appending
>>>>>
>>>>> it you should merge those block in order to make a single dataset.
>>>>>
>>>>> Then you should be able to append it.
>>>>>
>>>>>
>>>>> On Mon, Jun 11, 2012 at 10:50 AM, Chris <chris.schweighofer at gmx.net> wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Hello Sebastien,
>>>>>
>>>>>
>>>>> thx for your answer. I tried to do so and tried to save it in a vrml.
>>>>>
>>>>> However I have troubles if I import the geometric structure from vtk with
>>>>>
>>>>> two colors or if I want to create a geometric structure with two colors.
>>>>>
>>>>>
>>>>> The colors stay always the same and if I want to do a appended geometry I
>>>>>
>>>>> only get an error message:
>>>>>
>>>>>
>>>>> ERROR: In
>>>>>
>>>>> /Users/partyd/Kitware/ParaView-3.8/src/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
>>>>>
>>>>> line 827
>>>>>
>>>>> vtkCompositeDataPipeline (0x30cacf10): Input for connection index 1 on input
>>>>>
>>>>> port index 0 for algorithm vtkAppendPolyData(0x3022e260) is of type
>>>>>
>>>>> vtkMultiBlockDataSet, but a vtkPolyData is required.
>>>>>
>>>>>
>>>>>
>>>>> Please can you explain me why that happens?
>>>>>
>>>>>
>>>>> Thx,
>>>>>
>>>>> Chris
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Am 11.06.2012 um 05:42 schrieb Sebastien Jourdain:
>>>>>
>>>>>
>>>>> Hi Chris,
>>>>>
>>>>>
>>>>> If the point is to have the VRML to contains both, by loading the 2
>>>>>
>>>>> objects in the scene, exporting the scene will do the trick.
>>>>>
>>>>>
>>>>> If not that will be trickier but still doable. You will need to
>>>>>
>>>>> generate a given scalar across the 2 datasets and merge the geometry.
>>>>>
>>>>> Then use your custom scalar to apply the right color and opacity
>>>>>
>>>>> across the whole geometry.
>>>>>
>>>>>
>>>>> Seb
>>>>>
>>>>>
>>>>> On Sun, Jun 10, 2012 at 1:17 PM, Chris <chris.schweighofer at gmx.net> wrote:
>>>>>
>>>>>
>>>>> Hello people,
>>>>>
>>>>>
>>>>>
>>>>> I would like to know if it is possible to fuse two 3d models, one with a
>>>>>
>>>>> solid and one with a transparent color. This dataset should be afterwards
>>>>>
>>>>> saved within a vrml file for a rapid prototype printer.
>>>>>
>>>>>
>>>>>
>>>>> Is this possible?
>>>>>
>>>>>
>>>>> How?
>>>>>
>>>>>
>>>>>
>>>>> Thx,
>>>>>
>>>>>
>>>>> Chris
>>>>>
>>>>>
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