[Octave-bug-tracker] [bug #41294] FLTK does not draw linewidths >= 6 correctly

[Rik]

Update of bug #41294 (project octave):

                  Status:               Confirmed => Invalid                
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #3:

I found the problem.  The issue is that OpenGL itself only supports a limited
range of line widths.  It has a range both for aliased (jagged) and
anti-aliased (smooth) lines.

I've attached code which will print out these ranges.  Unfortunately it's in C
so you need to have the development packages for GL, GLU, and GLUT installed. 
On Linux it compiles with


gcc -o rpt_lwidth rpt_lwidth.c -lGL -lGLU -lglut


In my case, the range of smooth lines is 1.0-5.0 and the granularity is 0.5 so
I can really have lines from 0.5-5.5 which explains the issue.

I don't think there's much to be done about this so I'm closing the report.

(file #31215)
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Additional Item Attachment:

File name: rpt_lwidth.c                   Size:0 KB


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