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From: a_dent@fennel.cc.uwa.oz.au
Newsgroups: comp.sys.mac.programmer
Subject: Re: Problems with SetLineWidth
Message-ID: <1990Nov10.213656.2583@fennel.cc.uwa.oz.au>
Date: 10 Nov 90 13:36:56 GMT
References: <1990Nov5.203354.14090@wam.umd.edu> <11125@goofy.Apple.COM>
Organization: University of Western Australia
Lines: 46

In article <11125@goofy.Apple.COM>, sean_parent.snarkmail_l_z@gateway.qm.apple.com (Sean Parent) writes:
> In article <1990Nov5.203354.14090@wam.umd.edu> nebel@wam.umd.edu (Chris D. 
> Nebel) writes:
>> I'm having extreme problems with the SetLineWidth piccomment.  Though the
>> tech notes claim otherwise, the scaling factor I send seems to be 
> cumulative.
>> I.e., if I send several SetLineWidth(1/2), PenSize(1, 1) Line sequences 
> in
>> a row (which should give a series of 1/2 point lines), I actually get a
>> set of progressively thinner lines.
> 
> The SetLineWidth comment would be better named 
> MultiplyPenScaleFactorByRatio since what you describe is exactly what it 
> does. 

If this is a multiplication then does a setLineWidth of 1 actually achieve 
nothing???  I have tried seLineWidth of half then one thinking that would
reset but had problems similar to those described (I put them down to the
printer!).

If I want to change line width to half point and back should I use:

SetLineWidth(half)
draw my line
Pensize(1,1)

OR  


SetLineWidth(half)
draw my line
SetLineWidth(one)
Pensize(1,1)

OR 

SetLineWidth(half)
draw my line
SetLineWidth(one)


Andy Dent                     A.D. Software phone 09 249 2719
Mac & VAX programmer          94 Bermuda Dve, Ballajura

a_dent@fennel.cc.uwa.oz       Western Australia  6066     
a_dent@fennel.cc.uwa.oz.AU (international)