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0010487

VTK

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public

2010-03-30 09:27

2016-08-12 09:55

Reporter

Eric Monson

Assigned To

Jeff Baumes

Priority

normal

Severity

minor

Reproducibility

always

Status

closed

Resolution

moved

Platform

Mac & Linux

10.6 & Ubuntu 9.10

OS Version

Product Version

Target Version

Fixed in Version

Summary

0010487: Hardware Selector gives unreliable results with textured polygons

Description

I 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 Reproduce

I'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

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Attached Files

HardwareSelectorTest.zip [^] (28,756 bytes) 2010-03-30 09:27

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Notes
(0037157) Kitware Robot (administrator) 2016-08-12 09:55	Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

Issue History
Date Modified	Username	Field	Change
2010-03-30 09:27	Eric Monson	New Issue
2010-03-30 09:27	Eric Monson	File Added: HardwareSelectorTest.zip
2010-03-30 10:19	Jeff Baumes	Status	backlog => tabled
2010-03-30 10:19	Jeff Baumes	Assigned To	=> Jeff Baumes
2011-06-16 13:11	Zack Galbreath	Category	=> (No Category)
2016-08-12 09:55	Kitware Robot	Note Added: 0037157
2016-08-12 09:55	Kitware Robot	Status	expired => closed
2016-08-12 09:55	Kitware Robot	Resolution	open => moved