PR# 264873 The analysis view command shows thinner zones since after v4.0.

huangyhg

The analysis view command shows thinner zones since after v4.0.
<< Don Ruggieri  --  10/14/09  12:47:26>>
data is in 10142009_01a.zip (V35MR2), 10142009_01b.zip (v37mr3), 10142009_01c.zip (V40r), 10142009_01d.zip (V43MR2) and 10142009_01e.zip (V2010QA).  The analysis view command shows thinner zones since after v4.0.
Steps to reproduce:
I was researching a question on the histogram as part of the analysis view.  I measured a plane and dimensioned its flatness, and then displayed the histogram and the corresponding color bar.
In V35Mr2, V37MR3, and V40r the histogram has zones (lines) with some thickness to them, they are easy to view and read.
In V43MR2 and in v2010QA  the zones are thin lines, and not nearly as easy to read..
<<END>>

<< Rex Heagy (Development Notes)  --  11/11/09  12:48:48>>
This is a result of the Task to double the dimensions for +/-.
<<END>>
<< Changes made by Don Turcotte (Test Notes) -- 11/11/09  13:47:31>>
To test this by comparing the histogram to earlier versions of PC-DMIS, you must set the DISPLAYPRECISION to 4 in the earlier versions.  PC-DMIS 2009 and later use machine precision for the calculation of the histogram bins (4 digits in mm).  When you do this, the histograms will now be identical when comparing versions.  
You should also test straightness and profile since these dimensions use different routines in the code to determine the bins.
<<END>>
<< Changes made by Don Turcotte (Review Notes) -- 11/11/09  13:47:31>>
I have fixed this so the histogram displays the same way as in previous versions (same number of bars).  This resolves the issue with the thinness of the bars in 2010.  This problem was introduced when the color table was expanded to accomodate "show colors in two directions".  Also note that #245093 changed the precision for the histogram bin calculations so that the machine precision is always used (4 digits in mm).  This means the histogram bins are no longer dependent on the user's setting of DISPLAYPRECISION.  The precision change was made in PC-DMIS 2009.
<<END>>