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IDProjectCategoryView StatusDate SubmittedLast Update
0010487VTK(No Category)public2010-03-30 09:272016-08-12 09:55
ReporterEric Monson 
Assigned ToJeff Baumes 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
PlatformMac & LinuxOS10.6 & Ubuntu 9.10OS Version
Product Version 
Target VersionFixed in Version 
Project
Type
Summary0010487: Hardware Selector gives unreliable results with textured polygons
DescriptionI was creating a vtkIcicleView with textured polygons, but started to see weird selection behavior depending on the texture image I was using.

Finally I figured out that the Hardware Selector reports inconsistent cell IDs when the texture image is too dark. With white around the periphery (on my Mac with Cocoa and CVS VTK it only needs to be a one-pixel white border) the selector works fine. As the image gets darker it starts to report erroneous IDs. When the image is too dark it can't "see" any polys at all.
Steps To ReproduceI'm attaching a zip file which contains a Python script and four PNG images to show the effect. This was the simplest example I could come up with to reproduce the problem using "off the shelf" VTK.

You need to set the path for the images and VTK source in the script, and then uncomment which image you want to use for the test. Then, you click on the rectangles of the icicle view (not really using vtkIcicleView here, just a pipeline and a vtkRenderView) and look at the terminal for a printout of the cell IDs that the hardware selector reports.

The comments at the beginning of the script summarize what you should see:

# IDs in tree should be (and are reported with Good image as):
#
# 0 0 0 0 0 0 0 0 0
# 1 2 3 4 4 4 8 9 10
# 5 6 7

# Unreliable reports them as:
#
# 0 0 0 0 0 0 0 0 0
# 0 1 2 3 3 3 6 6 7
# 3 4 5

# Bad can't see any nodes to select at all
Additional Information
TagsNo tags attached.
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Attached Fileszip HardwareSelectorTest.zip (28,756) 2010-03-30 09:27
https://www.vtk.org/Bug/file/7998/HardwareSelectorTest.zip
Issue History
Date ModifiedUsernameFieldChange
2010-03-30 09:27Eric MonsonNew Issue
2010-03-30 09:27Eric MonsonFile Added: HardwareSelectorTest.zip
2010-03-30 10:19Jeff BaumesStatusbacklog => tabled
2010-03-30 10:19Jeff BaumesAssigned To => Jeff Baumes
2011-06-16 13:11Zack GalbreathCategory => (No Category)
2016-08-12 09:55Kitware RobotNote Added: 0037157
2016-08-12 09:55Kitware RobotStatusexpired => closed
2016-08-12 09:55Kitware RobotResolutionopen => moved

Notes
(0037157)
Kitware Robot   
2016-08-12 09:55   
Resolving issue as `moved`.

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