[vtkusers] EDL on VTK7

[Ken Martin]

The TestEDLPass example renders all the passes with EDL. I think the
solution for you is to change up the render passes.  Specifically something
like

camerapass
   {
   - sequence pass
      {
      - EDLPass
         {
         - sequence pass
            {
            - camera pass
            - lights pass
            - opaque pass
            - translucent pass (if needed)
            }
         }
      - OverlayPass
      }
   }

Each indent is a delegate of the pass above it. That way the geometry is
still has EDL applied to it, but the 2D overlay would not.  We probably
could use a class to help put this all together as these types of
putting-passes-together can be a bit lengthy in code.

Ken






On Tue, Feb 23, 2016 at 2:18 PM, rich <richuitnl at gmail.com> wrote:

> Hi All,
> I have upgraded VTK 6.1 to VTK 7/OpengL2, my app draws a basic point cloud.
> Iam using a  vtkSliderWidget/ vtkSliderRepresentation2D* to change the
> point
> size interactively. This works ok, both on 6 and 7. Now I was playing with
> the vtkEDLShading and this works fine as long as I hide the Slider. As soon
> as I show the slider it crashes in vtkEDLShading.cxx around line 400.
>
>  double bb[6];
>   vtkMath::UninitializeBounds(bb);
>   for(int i=0; i<s.GetPropArrayCount(); i++)
>   {
>   double* bounds = s.GetPropArray()[i]->GetBounds();   <<<========= HERE
>   if(i==0)
>   {
> .....
>
>
> So what happens is that the SliderRepresentation shows up as a prop(? sorry
> for the noob language) here but this has no bounds, so it crashes on the
> nullptr. So I tried to call
> SetUseBounds(false) but this did not matter, still crashes.
>
> So then I recompiled the vtkEDLShading.cxx to:
>
>  // FIX for crash on Slider Widgets
>   int nBBCount = 0;
>   for (int i = 0; i < s.GetPropArrayCount(); i++)
>   {
>           if (s.GetPropArray()[i]->GetUseBounds())
>           {
>                   double* bounds = s.GetPropArray()[i]->GetBounds();
>
>                   if (bounds != 0)
>                   {
>                           if (nBBCount == 0)
>                           {
>                                   bb[0] = bounds[0];
>                                   bb[1] = bounds[1];
>                                   bb[2] = bounds[2];
>                                   bb[3] = bounds[3];
>                                   bb[4] = bounds[4];
>                                   bb[5] = bounds[5];
>                           }
>                           else
>                           {
>                                   bb[0] = (bb[0] < bounds[0] ? bb[0] :
> bounds[0]);
>                                   bb[1] = (bb[1] > bounds[1] ? bb[1] :
> bounds[1]);
>                                   bb[2] = (bb[2] < bounds[2] ? bb[2] :
> bounds[2]);
>                                   bb[3] = (bb[3] > bounds[3] ? bb[3] :
> bounds[3]);
>                                   bb[4] = (bb[4] < bounds[4] ? bb[4] :
> bounds[4]);
>                                   bb[5] = (bb[5] > bounds[5] ? bb[5] :
> bounds[5]);
>                           }
>
>                           nBBCount++;
>                   }
>           }
>   }
>
> And this fixed the crash but now the slider widget is also EDL shaded.
> Is there something I overlooked?
>
> thanks,
> RIch.
>
>
>
>
> --
> View this message in context:
> http://vtk.1045678.n5.nabble.com/EDL-on-VTK7-tp5736766.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
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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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