[vtkusers] Non-transparent wireframe representation?

[Jérôme]

Hi,

>From my paraview point of view, I use backface culling sometimes when I
don't have intersected rendered objects, just as you said Xabi. Joel, maybe
it could be the solution. However, I don't think that it would resolved the
shading problem. IMHO, setting the rendering to Wireframe will deactivate
the shading process. But it has to be checked.

BTW, did you try to play with ResolveCoincidentTopology stuffs in the mapper
?

Jerome

2010/4/26 xabi riobe <xabivtk at gmail.com>

> try vtkProperty::BackfaceCullingOn()
> The wireframe is still transparent, so if an object is behind you will see
> it, but if you are working with a single mesh and your aim is to see only
> the edges in front of the camera it will do what you are looking for.
>
> 2010/4/26 Joel Schaerer <joel.schaerer at gmail.com>
>
>>
>> Hi Jérôme,
>>
>> thanks for your answer! I've tried implementing the forked pipeline
>> exactly
>> as you said, but unfortunately my graphics card doesn't seem to like
>> rendering two objects that are so close. As a result, some edges are
>> hidden
>> randomly, which results in a very ugly flicker effect when the meshes are
>> animated. Here is a static screen capture to illustrate the effect:
>>
>>
>> http://www.creatis.insa-lyon.fr/~schaerer/capture_36_0000_Pod1_deformed_to_0000_Pod1.png<http://www.creatis.insa-lyon.fr/%7Eschaerer/capture_36_0000_Pod1_deformed_to_0000_Pod1.png>
>>
>> I've tried adding a vtkShrinkFilter. This improves thing a bit, but there
>> still are problems.
>>
>> Does anyone have a better solution to offer? I believe that at one point
>> the
>> wireframe representation used to be opaque by default. At what point and
>> why
>> did that change?
>>
>> Thanks again,
>>
>> joel
>>
>>
>> Jérôme-2 wrote:
>> >
>> > Hi Joel,
>> >
>> > I don't know of this is a good way, but you can try a forked
>> visualisation
>> > pipeline:
>> >
>> > 1) Original polydata -> Surface representation
>> > 2) Original polydata -> PolyDataNormals -> ExtractEdges -> Surface
>> > representation
>> >
>> > You will have to play with normals flipping, consistency and surface
>> > color.
>> > I will send (PM) a screenshot of a ParaView rendering that follows this
>> > idea.
>> >
>> > HTH
>> >
>> > Jerome
>> >
>> >
>> >
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Non-transparent-wireframe-representation--tp28362835p28364190.html
>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>
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