[Paraview] isosurfaces & slices, lights/shadows

[Michael Müller]

Thanks a lot, this works fine.

I always thought the other way round, that I got to keep lights off and 
modify the contour/isofsurface...

Michael


On 03.05.2018 15:10, David E DeMarle wrote:
> We can't yet restrict lights to specific objects.
>
> However you can get the effect you want by turning up the ambient
> intensity and turning off the diffuse intensity on the objects you
> want to be independent of the light (the slices).
>
> See Ambient and Diffuse sliders in the GUI or from python do something
> like the following:
> obj = FindSource("Slice1")
> rep = GetRepresentation()
> rep.Diffuse = 0
> rep.Ambient = 1
>
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
>
> On Thu, May 3, 2018 at 4:21 AM, Michael Müller
> <m.mueller at recom-services.de> wrote:
>> Dear users,
>>
>> I am having some problem visualizing isosurfaces/contours in combination
>> with slices. Usually I switch off all lights to get nice coloring:
>> /
>> renderView1.UseLight = 0               # for slices etc.
>> /
>> (Output without isosurface attached: temp.jpg)
>>
>> When I include an isosurface using contour-filter, it looks totally 'flat',
>> there are no contours or shadows visible.
>> (Output with ugly isosurface attached: temp-iso-nolight.jpg)
>>
>> What I tried to do was switch on lighting and include additional lights with
>> intensity 0.6 (to prevent getting too dark coloring of the slices).
>> /
>> renderView1.UseLight = 1               # for slices etc.
>> light1 = AddLight(view=renderView1)    # for contour on isosurfaces !!!
>> light1.Coords    = 'Ambient'           # position-less == camera
>> light1.Intensity = 0.6                 # dim intensity [0:1]
>> /
>> (Output with nice isosurface attached: temp-iso-light-addlight06.jpg).
>>
>> Still the problem: while I get a nice isosurface and the vertical slice is
>> looking okay, the horizontal slices are still darker than the ones in the
>> default screenshot (see: temp-iso-light-addlight06.jpg vs temp.jpg).
>>
>> Is there a way, to turn on/off lights on single objects in my pipeline?
>> Is it possible to include something like shading directly to the isosurface?
>> Any other ideas!?
>>
>> Thanks,
>>
>> Michael
>>
>>
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>