Re: How to crop image in powerplant

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#666

From: Jon Summers
Date: Thu, 09 Oct 2003 13:04

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in article 7328a61a.0310090125.3fd8c2aa@posting.google.com, wall at
heroin_c@hotmail.com wrote on 09/10/03 7:25 PM:

> who know where is error in this code. because sometime when the code
> perform here,project will crash.

You code crashes writing passed the end of the destination GWorld

off-by-one error /n./
Exceedingly common error induced in many ways, such as by writing <= N
instead of < N. 

fencepost error /n./
A problem with the discrete  equivalent of a boundary condition, often
exhibited in programs by iterative loops.  From the following problem: "If
you build a fence 100 feet long with posts 10 feet apart, how many posts do
you need?" (Either 9 or 11 is a better answer than the obvious 10.)
Fencepost errors come from counting things rather than the spaces between
them.
 
-- 
   jons(AT)vrtools(DOT)invalid

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Date: Thu, 09 Oct 2003 23:04:29 +1000
Subject: Re: How to crop image in powerplant
From: Jon Summers <jons@vrtools.INVALID>
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