[vtkusers] Zebra shader to visualise continuity of surfaces

[David E DeMarle]

You could also approximate with vtkFunctionParser (paraview's Calculator
filter) and an indexed colormap.

Expression of 5+floor(Normals_Y*5) gives you 10 stripes for the Y component
of the normal.



David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Mon, Apr 16, 2018 at 11:00 AM, David E DeMarle <dave.demarle at kitware.com>
wrote:

> There is not currently.
>
> In principle we could do that with a glsl fragment shader applied to the
> polydatamapper.
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Fri, Apr 13, 2018 at 5:41 PM, Jonathan Borduas <
> jonathan.borduas at caboma.com> wrote:
>
>> Hello,
>>
>> Is there a zebra shader in VTK ? Many surfacing software such as Rhino,
>> Alias and Fusion360 incorporate this Zebra shader to show the continuity
>> (G0,G1,G2..) of the surface between different patchs:
>> http://www.bluesmith.co.uk/LW/theoryBuilders/evaluateZebra.htm
>> https://www.youtube.com/watch?v=NtMybG8Nsfg
>>
>>
>> This allows a designer to verify that the aesthetics of the blend between
>> two surfaces. See attached pictures zebra.png.
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Jonathan Borduas
>>
>>
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