[vtkusers] Projected shadow rendering in a vtkRenderWindow

Tue Jun 28 10:41:43 EDT 2016

Replace the dragon with whatever you want to render or download it and
change the code to point to where you put it.

http://www.cc.gatech.edu/projects/large_models/dragon.html

You can remove the RegressionTest code, it is just there to support our
regression tests.

On Tue, Jun 28, 2016 at 10:28 AM, Remi Charrier <remi.charrier at gmail.com>
wrote:

> Thanks for the information,
>
> As you probably guessed I was not looking in the proper folder for the
> OpenGL2 backend that I configured.
>
> I managed to get something, almost working (I have strange shadows in
> addition to the normal shadow) by changing this example. As I would like to
> understand what is wrong, I then started to try to get the
> TestShadowMapPass.cxx  working as it is.
>
> I have 2 problems:
>  -  #include "vtkRegressionTestImage.h"
> "Cannot open include file: 'vtkRegressionTestImage.h' "
> I believe I did not include or generate the vtk module that contains it
> (but I do not manage to know which one it could be). It seems it is not
> useful for the core of this feature, but I would like to get everything
> working before going further...
>
> - the code is mentioning a 3D object: dragon.ply . On my computer I only
> have the dragon.ply.md5 . What should I do? Use another software to
> transform the .md5 into a .ply, or something else?
>
> Finally, as you mentioned, this shadow rendering seems to not be
> compatible with the stereo technique implemented in the vtkRenderWindow or
> at least no directly...
>
> Thanks!
> Rémi
>
>
>
>
>
>
>
> 2016-06-27 21:43 GMT+02:00 Ken Martin <ken.martin at kitware.com>:
>
>> For both the old and new OpenGL backends there are tests built into VTK
>> using shadows. See
>>
>> VTK/Rendering/OpenGL2/Testing/Cxx/TestShadowMapPass.cxx or if building
>> the old backend
>> VTK/Rendering/OpenGL/Testing/Cxx/TestShadowMapPass.cxx.  I have do not
>> know if those will work in conjunction with the stereo technique you are
>> using but those examples should give you some ideas.
>>
>> Thanks
>> Ken
>>
>>
>>
>> On Mon, Jun 27, 2016 at 3:22 AM, Remi Charrier <remi.charrier at gmail.com>
>> wrote:
>>
>>> Dear vtk users community,
>>>
>>> I started 3 weeks ago a new project with vtk, I just register to this
>>> mailing list to get answers to some of my questions. Let me know if I am
>>> doing anything wrong in the use of this mailing list.
>>>
>>> My development environment is :
>>> - Visual Studio 2013
>>> - vtk7.0
>>> - qt5.7
>>> My computer has a NVidia TITAN X graphic card.
>>>
>>> Here is my problem:
>>> - I managed to create a vtkRenderWindow that allows me to display
>>> different 3D meshes
>>> - I am using Stereo Rendering (Anaglyph mode)
>>> - I would like to project the shadows of my different elements on the
>>> others elements.
>>>
>>> To do so I tried many different things, but did not manage to find
>>> anything that seems to work.
>>> Here are what I tried:
>>> - vtkEDLshading - I got it running but it does not do what I expected
>>> and no projected shadows appear
>>> - vtkShadowMapBakerPass (as described in
>>> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Shadows) but I
>>> have compilation errors on vtkShadowMapBakerPass::OCCLUDER(), it seems
>>> this class has change or I missed something: "error C2039: 'OCCLUDER' :
>>> is not a member of 'vtkShadowMapBakerPass'"
>>> - Then I tried to only use basic functions associated to the renderer or
>>> the actors: m_Renderer->UseShadowsOn();     m_cylTipActor->GetProperty()->ShadingOn();
>>> But once again no visible result...
>>>
>>> If someone can tell me where the correct information to display
>>> projected shadows with VTK 7.0 can be found, I can then investigate and
>>> come back to you with my code if I am still having problems.
>>>
>>> Thanks in advance,
>>> Rémi (glad to come back to vtk after an 8 years break)
>>>
>>>
>>>
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>>
>>
>> --
>> Ken Martin PhD
>> Chairman & CFO
>> Kitware Inc.
>> 28 Corporate Drive
>> Clifton Park NY 12065
>> 518 371 3971
>>
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>
>

-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
addressee.  Access to this email by anyone else is unauthorized. If you are
not the intended recipient, any disclosure, copying, distribution or any
action taken in reliance on it is prohibited and may be unlawful. If you
received this communication in error please notify us immediately and
destroy the original message.  Thank you.
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