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Article View: comp.lang.postscript
Article #1293

Re: Determining the proper BoundingBox ??

#1293
From: Rob Bradlee
Date: Thu, 09 Nov 1989 12:40
38 lines
2349 bytes
In article <7893@cg-atla.UUCP> felleman@cg-atla.UUCP (John Felleman) writes:
>In article <5553@ubc-cs.UUCP> halliday@cc.ubc.ca (Laura Halliday) writes:
>
>Actually, I don't think the EPSF document was recommending that you actually
>measure each document you created for export. Rather, the correct bounding
>box was defined as what you would get if you did measure it by hand.

>-- 
>John Felleman  (508)-658-5600 X7034
>AGFA Compugraphic	    ...!{ima,ulowell,ism780c}!cg-atla!felleman
>200 Ballardvale St.
>Wilmington, Mass. 01887           [This space available for rent]

I love to disagree with my co-worker and friend John.  As I read the EPSF
spec it sure sounds to me that Adobe is recommending that you measure by
hand to determine the bounding box.  If they are saying that you can
test the correctness of your calculation by measuring by hand, then they 
should say so in the next revision of the document.  But just to destroy
a good theoretical net argument, I'll mess it up with some factual details.
Here's the way the spec reads:

	"Regardless of the coordinate system in which your application
	operates, here is a fooproof way of determining the correct 
	bounding box: print the page, get out a point ruler, and measure 
	first to the lower left corner, then to the upper right corner,
	using the lower-left corner of the physical paper as your origin.
	This works because it measures the end result (the marks on the
	page), and none of the computation matters.

(By the way I really like how they use lower-left unhyphenated and hyphenated
in the same paragraph.)


-- 
Rob Bradlee  w:(508)-658-5600 X5153  h:(617)-944-5595
AGFA Compugraphic Division.    ...!{decvax,samsung}!cg-atla!bradlee
200 Ballardvale St.
Wilmington, Mass. 01887           The Nordic Way: Ski till it hurts!
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!cg-atla!bradlee
References: <3094@husc6.harvard.edu> <5553@ubc-cs.UUCP> <7893@cg-atla.UUCP>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!cg-atla!bradlee
From: bradlee@cg-atla.UUCP (Rob Bradlee)
Newsgroups: comp.lang.postscript
Subject: Re: Determining the proper BoundingBox ??
Keywords: Postscript programs, BoundingBox comment
Message-ID: <7894@cg-atla.UUCP>
Date: 9 Nov 89 12:40:21 GMT
References: <3094@husc6.harvard.edu> <5553@ubc-cs.UUCP> <7893@cg-atla.UUCP>
Reply-To: bradlee@cg-atla.UUCP (Rob Bradlee)
Organization: Agfa Compugraphic Division
Lines: 38