MantisBT - VTK |
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| ID | Project | Category | View Status | Date Submitted | Last Update |
| 0007296 | VTK | (No Category) | public | 2008-07-07 08:14 | 2016-08-12 09:55 |
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| Reporter | Julian Ibarz | |
| Assigned To | Kitware Robot | |
| Priority | normal | Severity | feature | Reproducibility | N/A |
| Status | closed | Resolution | moved | |
| Platform | | OS | | OS Version | |
| Product Version | | |
| Target Version | | Fixed in Version | | |
| Project | |
| Type | |
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| Summary | 0007296: Not erasing Z-buffer on selection rendering |
| Description | When using pick color selection, only the pickable actors are drawn. But they could be hidden by an unpickable actor in a normal rendering and the user could select an unvisible actor that is not desired in general. |
| Steps To Reproduce | |
| Additional Information | A workaround is to set all the actors pickable to be sure that all the actors will be drawn on pick color rendering. But if we have a scene that contains 1000 actors and we have only 10 actors really pickable for the user we will draw 990 actors for nothing. I tried this solution but it's too slow for my purpose.
A solution is to not erase the z-buffer before making a rendering selection so only really visible actors will be drawn. This permits to gain more than 1 or 2 seconds for really big scenes.
I made a patch to do that. The feature is used as follows :
vtkVisibleCellSelector selector = new vtkVisibleCellSelector();
selector.SetRenderer(canvas.GetRenderer());
selector.SetArea(firstPoint[0], firstPoint[1], secondPoint[0],
secondPoint[1]);
selector.SetRenderPasses(0, 1, 0, 0, 1, 0);
canvas.lock();
canvas.GetRenderer().ClearDepthForSelectionOff(); // Do not erase the Z-buffer on selection rendering
selector.Select();
canvas.unlock();
It's a very light patch not intrusive and I think it should help some projects. |
| Tags | No tags attached. |
| Relationships | |
| Attached Files |  01_depth.patch (2,249) 2008-07-07 08:14
https://www.vtk.org/Bug/file/6583/01_depth.patch |
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| Issue History |
| Date Modified | Username | Field | Change |
| 2008-07-07 08:14 | Julian Ibarz | New Issue | |
| 2008-07-07 08:14 | Julian Ibarz | File Added: 01_depth.patch | |
| 2008-10-16 04:36 | dbarbier | Note Added: 0013890 | |
| 2011-06-16 13:11 | Zack Galbreath | Category | => (No Category) |
| 2016-08-12 09:55 | Kitware Robot | Note Added: 0036996 | |
| 2016-08-12 09:55 | Kitware Robot | Status | expired => closed |
| 2016-08-12 09:55 | Kitware Robot | Resolution | open => moved |
| 2016-08-12 09:55 | Kitware Robot | Assigned To | => Kitware Robot |