[Paraview] Contribution : Silhouette edges filter

[Utkarsh Ayachit]

Actually, I think a new view type that applies the silhouette filters to 
all the props rendered in the scene might be more appropriate. There are 
plugin examples that talk about how to add a new view to ParaView. Thoughts?

Utkarsh

Moreland, Kenneth wrote:
> Filters within ParaView have no access the camera for a variety of 
> reasons.  If you want the filter to update with new camera positions, 
> you will have to integrate it into a representation/view.  
> Representations and views can be added with plugins, they just take a 
> bit more work than adding a filter.
> 
>  
> 
> A new feature that is available on the ParaView development branch and 
> will be available in 3.4 is the ability for a plugin to add a new 
> representation to the 3D View (the default view within ParaView).  Right 
> now, the feature is undocumented, but documentation should be coming 
> soon.  Perhaps Utkarsh can fill in here.
> 
>  
> 
> -Ken
> 
>  
> 
> ------------------------------------------------------------------------
> 
> *From:* paraview-bounces at paraview.org 
> [mailto:paraview-bounces at paraview.org] *On Behalf Of *Paul Edwards
> *Sent:* Wednesday, July 30, 2008 4:14 AM
> *To:* Thierry.CARRARD at cea.fr
> *Cc:* guillaume.colin-de-verdiere at cea.fr; Laurent.COLOMBET at cea.fr; 
> Jean-Philippe.NOMINE at cea.fr; paraview at paraview.org
> *Subject:* Re: [Paraview] Contribution : Silhouette edges filter
> 
>  
> 
> The filter looks good.  I've tried to create an XML file to use in
> ParaView.  I've attached my attempt although I don't know how to
> initialise the camera or prop.  Can anyone help here?
> 
> Regards,
> Paul
> 
> 2008/7/30  <Thierry.CARRARD at cea.fr>:
>>  Dear colleagues,
>>
>>
>>
>>  Here attached is a vtk filter that extracts silhouette edges from a poly
>>  data.
>>
>>  Silhouette of a surface is made of lines lying on the surface where the
>>  surface normal is orthogonal to a direction.
>>
>>
>>
>>  Such edges are useful to produce CAD or sketch like drawings. It can be
>>  combined with a constant colored surface rendering to hide non-visible
>>  edges.
>>
>>
>>
>>  Attached example images are made from an iso-surface, but much nicer 
> results
>>  are achieved when working with lagrangian numerical simulations.
>>
>>
>>
>>
>>
>>  Usage:
>>
>>
>>
>>  Pipeline: vtkPolyData à vtkPolyDataSilhouette à vtkPolyDataMapper à 
> vtkActor
>>
>>
>>
>>  Parameters: SpecifiedVector and CameraVector modes use a uniform direction
>>  (resp. explicit or from a camera), while SpecifiedOrigin and CameraOrigin
>>  modes use the origin-to-center-of-the-edge direction. CameraOrigin mode is
>>  the one to use to produce sketch like drawings.
>>
>>
>>
>>  tips: try to combine black silhouettes edges (with line width between 
> 1 and
>>  3) with different kinds of surface base renderings (with or without
>>  lighting, constant colored or one color per material). It emphasizes very
>>  well the shape of some phenomena, especially for numerical simulations.
>>
>>
>>
>>  Note: Silhouette edges can also serve to generate shadow volumes, but this
>>  would need an additional contribution.
>>
>>
>>
>>
>>
>>  Contribution :
>>
>>
>>
>>  Author:
>>
>>  Thierry Carrard
>>
>>
>>
>>  Affiliation:
>>
>>  Commissariat à l'Energie Atomique (CEA), Direction des Applications
>>  Militaires, Département des Sciences de l'Information et de la Simulation.
>>
>>  BP12, 91680 Bruyères Le Chatel, France.
>>
>>  _______________________________________________
>>  ParaView mailing list
>>  ParaView at paraview.org
>>  http://www.paraview.org/mailman/listinfo/paraview
>>
>>
> 
> 
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