Re: help with DHR plotting

[Cyrus Roton <croton@ridgecrest.ca.us>]

On 11 Dec 1995, Neil Parker wrote:

> In article <Pine.SUN.3.91.951210100139.4708B-100000@owens> Cyrus Roton
> <croton@ridgecrest.ca.us> writes:
> >I need help in debugging a double hi-res plotting routine. The following
> >program steps are used in setting up for DHR plotting:
> >
----- snip ------
> >
> >The problem is that certain programs (not all of them) which use 80 columns,
> >seem to leave some softswitch or another set to interfere with this plotting.
> >The result is thin vertical bands on the plot. I can load and view DHR
> >properly, I just can't plot properly.
> >
> 
> This differs slightly from the symptoms I've experienced, but I'll risk
> a guess anyway.
> 
> Is your computer by any chance a IIGS?  And are the "certain programs" you
> mention by any chance Appleworks 2.0?
---- snip ------
> 
>                - Neil Parker

No, I am using a IIe, not a IIgs. I have not tried to see if AW causes 
the problem. Copy II Plus, Merlin, and the ProDOS "bye" all do cause the 
symptoms. Sneeze does not.

I had been plotting only every fourth horizontal point since the "brush" 
is four pixels wide. Usually, that works quite well, until certain 
programs leave some softswith (or something) in some unexpected 
condition. The solution I found is to plot all the hoizontal points, 
rather than only every fourth one. This seems to work quite well, though 
I still dont know why.

BTW the DHIRES.AMPER program has the same problem, when plotting every 
fourth point or even every second point, but not when plotting "lines".

Cyrus Roton   croton@ridgecrest.ca.us
Ridgecrest Apple User Group