Conference hydra::amiga_v1

4654.0. "ARexx / DigiPaint help?" by TFH::KIRK (a simple song) Tue Apr 02 1991 17:35

Hi,

I'm working on a program to do color contour plots of two dimensional arrays 
of data using Arexx to control DigiPaint.

So far I can map the data to a brush color and stamp the brush down in DP.
(a wide horizontal brush so HAM has enough pixels to get to the proper shade) 

To interpolate between the actual data points I want to use the RANGE drawing 
function, picking up the end point colors and ranging down between data
points, then working left to right between columns scan line by scan line. 

I'm having problems picking up the colors.  I Move the "drawing pen" to the 
appropriate position, but no combination of commands seems to select the pixel 
color.  I've been able to be in "Pick" mode when I toggle over to the DP 
screen, (after running the routine, I get into DP and have the �<? cursor) but 
haven't figured out how to get the colors set up for Range without doing it by 
hand.

I've tried commands that simulate a manual walkthrough, e.g.

	address 'DigiPaint'
	'Cbxg' ; 'Pick' ; 'Move' x y ; 'Pend' ; 'Penu'

	 select front range color
	          toggle Pick mode
	                   move the "drawing pen"
	                                pen down
	                                         pen up
	
and several variations on the theme.  I usually end up just painting on the 
screen with the front range color and my current brush.  I've tried 'Ccto' 
(copy color to...) to no avail.

All the Digi-Paint manual has is little one liner explanations of the various 
codes.  The sort of demos don't use the Pick command, although they do use 
'Ugad' (use gadget?) that the manual doesn't mention.  Got some ideas from 
perusing DigiMate macros, but still can't Pick my colors.

Any help would be appreciated.

Thanks.

Jim

Well, I got it all working, but I never did figure out how to pick colors via 
Arexx.  I ended up doing all the interpolation myself.

Turned out real nice, too.  I was able to visualize some subtleties in the 
dataset with which I was testing my routine that no one had ever noticed
before, thanks to Amiga graphics power and a little creativity. 

Anyway, I'd still like to figure out how to use the Pick command.  Has anyone 
ever tried this?

Thanks,

Jim