MantisBT - VTK
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IDProjectCategoryView StatusDate SubmittedLast Update
0006881VTK(No Category)public2008-04-23 02:012016-08-12 09:54
Reporteramaclean 
Assigned ToKitware Robot 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Project
Type
Summary0006881: Truncation of double precision to floating point when rendering.
DescriptionWhen rendering double precision data of 7 digits or more (e.g. Northings) the renderer seems to internally convert the data to floating point.

I am attaching two .vtp file which illustrate the problem.

NavXYZSRealCoords.vtp has double precision data where the x-coordinate is 7 digits. When you plot this you will see a characteristic banding pattern on the lines indicating that the data is being subsampled to a lower precision when plotted.

NavXYZSNear000.vtp is the same data rescaled so that it is close to zero in the x- and y- axes. Here the plot is what we would expect.

You can display these in ParaView to see the effect.


NavXYZSRealCoords.vtp
Bounds: (xmin,xmax,ymin,ymax,zmin,zmax) = (6167887.194354,6167937.979982,229956.716889,229999.075954,-642.855049,-641.947788)
Number of points: 74548
Scalar range: (0.008196,0.030176)

NavXYZSNear000.vtp
Bounds: (xmin,xmax,ymin,ymax,zmin,zmax) = (-69.882646,-19.097018,16.275889,58.634954,-13.864049,-12.956788)
Number of points: 74548
Scalar range: (0.008196,0.030176)
Steps To Reproduce
Additional InformationUnzip the zip file to get the two vtp files.
TagsNo tags attached.
Relationships
Attached Fileszip NavXYZS.zip (1,703,592) 2008-04-23 02:01
https://www.vtk.org/Bug/file/6427/NavXYZS.zip
Issue History
Date ModifiedUsernameFieldChange
2008-04-23 02:01amacleanNew Issue
2008-04-23 02:01amacleanFile Added: NavXYZS.zip
2011-06-16 13:11Zack GalbreathCategory => (No Category)
2016-08-12 09:54Kitware RobotNote Added: 0036970
2016-08-12 09:54Kitware RobotStatusexpired => closed
2016-08-12 09:54Kitware RobotResolutionopen => moved
2016-08-12 09:54Kitware RobotAssigned To => Kitware Robot

Notes
(0036970)
Kitware Robot   
2016-08-12 09:54   
Resolving issue as `moved`.

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