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 box disappears if rounding=0

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Messages : 45
Date d'inscription : 2017-01-30
Localisation : Newbury, Berkshire, England

box disappears if rounding=0 Empty
PostSubject: box disappears if rounding=0   box disappears if rounding=0 Icon_minitimeWed 8 Feb - 15:48

A node_box with rounding=0.0001 or greater is drawn, but with rounding=0 it disappears. This is because it is drawn as the convex hull of four cylinders, each with radius=rounding, one at each corner of the box. If the cylinders have radius 0, they cease to exist. You could fix this by changing from:
c=c+'translate([-'+xo+',-'+yo+',0]) cylinder(r='+rounding+',h='+zo+',$fn='+fn+');'
c=c+'translate([-'+xo+',-'+yo+',0]) cylinder(r=max(0.0001,'+rounding+'),h='+zo+',$fn='+fn+');'

and similarly for the other 7 cylinders.

This is in GraphSCAD 1.0.3 on Ubuntu 16.04
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