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IDProjectCategoryView StatusDate SubmittedLast Update
0015049ParaView(No Category)public2014-10-15 04:252016-08-12 09:59
ReporterUnivorsus 
Assigned ToKitware Robot 
PriorityimmediateSeverityminorReproducibilityhave not tried
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version4.2 
Target VersionFixed in Version 
Summary0015049: Logarithmic color legend tick marks in wrong position
DescriptionSuppose I set up a logarithmic color legend that spans, for example, from 10 to 100.

One would expect to have default tick marks at 10, 20, 30 ... 100. The total amount of tick marks would thus be 10.

Please, check this: you have 11 tick marks. Thus, ticks are not intuitive to read, as one does not know which values they represent.


I also noticed that the manual annotations do not account for logarithmic scaling, so that if I want to add a manual annotation I have to calculate the non-logarithmic position of the annotation with the following formula:

xmin=minimum value of legend
xmax=maximum value of legend
x=desired annotation value

x' = xmin + (xmax-xmin)*(log10(x)-log10(xmin))/(log10(xmax)-log10(xmin))

For example, in the above example, if I add an annotation at x=30, it will appear at the position of x=30 of the nonlogarithmic color legend. When I apply the above formula, I get x'=52.9409. That is the position I have to assign the annotation of x=30 when using logarithmic scale, if I want it to be correctly located.

Thank you very much.
TagsNo tags attached.
ProjectTBD
Topic Name
Typeincorrect functionality
Attached Files? file icon Tickmarks.tif [^] (177,054 bytes) 2014-10-15 04:25

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  Notes
(0038682)
Kitware Robot (administrator)
2016-08-12 09:59

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current ParaView Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2014-10-15 04:25 Univorsus New Issue
2014-10-15 04:25 Univorsus File Added: Tickmarks.tif
2016-08-12 09:59 Kitware Robot Note Added: 0038682
2016-08-12 09:59 Kitware Robot Status backlog => closed
2016-08-12 09:59 Kitware Robot Resolution open => moved
2016-08-12 09:59 Kitware Robot Assigned To => Kitware Robot

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