Major Bug in vtkMath::Distance2BetweenPoints

[Ben Held]

Ok, my apologies.  However, this function is used in ComputeXRange() in
vtkXYPlotActor to compute the X range when VTK_XYPLOT_ARC_LENGTH is set.
Therefore a sqrt is needed in the line:

     lengths[dsNum] += vtkMath::Distance2BetweenPoints(x,xPrev);
 
Thanks,

Ben

At 10:36 AM 7/28/99 -0400, you wrote:
>Ben,
>That method computes the square of the distance between two points as 
>stated in the man page.
>http://vtk.scorec.rpi.edu/Nightly/Doc/manhtml/vtkMath.html#method13
>
>This is for efficiency, since many uses of this value work with the squared 
>distance.
>
>Bill
>
>At 08:58 AM 7/28/99 -0500, Ben Held wrote:
>>Hello,
>>
>>I have discovered a major bug in vtkMath::Distance2BetweenPoints.  The
>>return value needs to be passed through sqrt.
>>Please make note of this so it can be fixed in 3.0.
>>
>>Ben
>>
>>John
>>Ben L. Held
>>Simulation Technology & Applied Research, Inc.
>>11520 N. Port Washington Rd.
>>Suite 101 B
>>Mequon, WI  53092
>>Phone: (414) 240-0293
>>FAX: (414) 240-0294
>>e-mail: ben.held at staarinc.com
>>
>>
>>
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>
>
>
John
Ben L. Held
Simulation Technology & Applied Research, Inc.
11520 N. Port Washington Rd.
Suite 101 B
Mequon, WI  53092
Phone: (414) 240-0293
FAX: (414) 240-0294
e-mail: ben.held at staarinc.com



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