MantisBT - ParaView
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IDProjectCategoryView StatusDate SubmittedLast Update
0006213ParaView(No Category)public2008-01-03 15:552009-05-13 13:49
ReporterDavid Karelitz 
Assigned ToKen Moreland 
PrioritynormalSeverityfeatureReproducibilityalways
StatusclosedResolutionwon't fix 
PlatformOSOS Version
Product Version 
Target VersionSomedayFixed in Version 
Project
Topic Name
Type
Summary0006213: (MARS-normal) Fix lighting when scaling by a negative factor
DescriptionWhen an actor is scaled by a negative value, the normals look wrong. Some polygons are front-facing and others are back-facing leading to lighting issues.
Steps To Reproduce
Additional Information
TagsNo tags attached.
Relationships
parent of 0004786closed Utkarsh Ayachit Reflect filter does not work in parallel 
parent of 0006812closed Utkarsh Ayachit Reflect filter does not work with multiblock data 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2008-01-03 15:55David KarelitzNew Issue
2008-03-07 07:56Berk GeveciTarget Version => MARS
2008-03-07 08:03Berk GeveciCategoryDevelopment => 3.4
2008-04-08 17:53Ken MorelandNote Added: 0011187
2008-04-09 09:48David KarelitzNote Added: 0011202
2008-04-10 16:26Ken MorelandNote Added: 0011264
2008-04-15 11:59Berk GeveciNote Added: 0011332
2008-04-15 11:59Berk GeveciStatusbacklog => @20@
2008-04-15 11:59Berk GeveciCategory3.4 => Someday
2008-04-15 12:05David KarelitzNote Added: 0011334
2008-04-15 16:56Ken MorelandNote Added: 0011360
2008-04-15 17:01David KarelitzNote Added: 0011362
2008-04-15 17:41Ken MorelandRelationship addedparent of 0004786
2008-04-15 17:42Ken MorelandRelationship addedparent of 0006812
2008-04-15 17:43Ken MorelandStatus@20@ => @80@
2008-04-15 17:43Ken MorelandResolutionopen => won't fix
2008-04-15 17:43Ken MorelandAssigned To => Ken Moreland
2008-04-15 17:43Ken MorelandNote Added: 0011367
2008-04-15 17:46Alan ScottStatus@80@ => closed
2008-04-15 17:46Alan ScottNote Added: 0011369
2009-05-13 13:49Utkarsh AyachitTarget VersionMARS => Someday
2011-06-16 13:10Zack GalbreathCategory => (No Category)

Notes
(0011187)
Ken Moreland   
2008-04-08 17:53   
Workaround: Apply the transform filter on the polygons and then re-generate normals (if necessary).

I'm not sure if there is another reasonable way around the problem.
(0011202)
David Karelitz   
2008-04-09 09:48   
This was with multiblock data from a CTH dataset, which the transform filter doesn't support.
(0011264)
Ken Moreland   
2008-04-10 16:26   
To render something, ParaView is extracting some polygonal data from the CTH dataset. Run a filter to extract the data yourself, apply the transform filter to that, and then regenerate the normals.
(0011332)
Berk Geveci   
2008-04-15 11:59   
There is no easy way to get around this. VTK would probably have to generate new normals based on the transform, I think. The best thing to do is to find another solution. What is the use case?
(0011334)
David Karelitz   
2008-04-15 12:05   
The use case is that a simulation was mirrored in one axis from an experiment and we want the simulation view to match the experiment view
(0011360)
Ken Moreland   
2008-04-15 16:56   
Sounds like you should be using the reflect filter. However, there are known issues with the reflect filter in parallel (bug 0004786) and there are probably issues with multiblock data. If these issues were fixed, would that satisfy your requirements?
(0011362)
David Karelitz   
2008-04-15 17:01   
That would work.
(0011367)
Ken Moreland   
2008-04-15 17:43   
There is no practical solution to this problem, so therefore we will not directly fix it. Instead, use the reflect filter instead of the transform filter and the normals will behave correctly. Once the two children bugs are fixed, the given use case will be solved.
(0011369)
Alan Scott   
2008-04-15 17:46   
Replaced by two child bugs.