[vtkusers] Projected shadow rendering in a vtkRenderWindow

[Ken Martin]

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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