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From: hsgj@batcomputer.tn.cornell.edu (Dan Green)
Newsgroups: comp.sys.amiga
Subject: where is SetDrPt ?
Message-ID: <2334@batcomputer.tn.cornell.edu>
Date: Mon, 14-Sep-87 20:14:20 EDT
Article-I.D.: batcompu.2334
Posted: Mon Sep 14 20:14:20 1987
Date-Received: Wed, 16-Sep-87 01:23:56 EDT
Distribution: comp
Organization: Theory Center, Cornell U., Ithaca NY
Lines: 37
Keywords: SetDrPt


I finally decided to do some graphics-type programming on my Amiga,
and I have run into a little difficulty.  I can't seem to find the
Kernel Graphics function 'SetDrPt'.  This function is suppossed to
set the line drawing pattern, so you can draw dotted or dashed (or
solid) lines.  When I use this function in a program and link with
amiga.lib (Kickstart 1.2G) the linker can't find the function in
the library.  Either:
	a) I am terribly confused.
	b) The function has a new name from what it was called in
	   the RKM.
	c) The function was never implemented, or was removed by C/A.
Can anyone enlighten me as to which of these is true?

As an aside, the thing I am working on is a 'rubberbanding' type 
rectangular select box.  I wanted it to have dashed lines, but now
have to settle for solid ones.  One thing I discovered is that if you
have to move endpoints around a lot (I do because the user keeps
dragging my box all over the place), then the Draw() function is
actually faster then the PolyDraw() function, because you don't waste
time recomputing the line array for polydraw.   The time difference
is pretty minimal (about 24 ticks / 1000 redraws of a 50x50x2 dot box).
It is a shame there is no RKM function equivalent to PolyDraw but
where the endpoints were a relative x,y distance from each other.  The
current polydraw requires absolute endpoints.

PS: On another topic, I whipped up a 'whereis' routine, but it takes 33
seconds to scan through the original WorkBench 1.2 disk (that came with
the gamma release) to hunt for a non-existant file.  Is anyone interested
in this utility -- or more importantly, has anyone whipped up a faster
one?  On this topic, please reply via email.

Thanks,
-- Dan Green
-- 
ARPA:  hsgj@tcgould.tn.cornell.edu
UUCP:  ihnp4!cornell!batcomputer!hsgj   BITNET:  hsgj@cornella