I need a little help, yet again...

[Gregory Conway]

     The following is a follow-up to a posting I made a little while ago in
comp.lang.c.  As you may remember, I was looking for an HPIB (GPIB) interface
board for an IBM PC AT and graphing software.  Thanks to many generous replys,
I have decided on and ordered a National Insturments board.  I have not, 
however, picked a supporting graphics routine.  I would once again like to 
ask for your help.  I need a package that works with Turbo C to allow
sophisticated screen graphics, including multi-color graphs, various fonts,
etc.  This will be used in a research lab to plot various functions attained
from lab equipment.  I know Turbo C does some of this, but I was looking for
something a little higher level, but that I can still link with my C routines.
I would write them myself, but I've got other projects that need attention too.
I need to easily be able change fonts, letter sizes, letter direction,
scaling of the graph, x-y-z axis support (as an example, I may want to plot
sample temperature .vs. time and dT/dt for five different samples on one
graph.)  The package must be capable of supporting a variety of record
formats (structure formats) as our data files created vary from program
to program.  I'm looking at a structure along the lines of:

	struct graph_info {
			
		int	device;			/* 0=screen, 1=plotter */
		int	px1,py1,px2,py2;	/* physical coordinates of
						   graph, lower-left and
						   upper-right */
		double	lx1,ly1,lx2,ly2;	/* logical coordinates which 
						   real data is scaled to */
		char 	*xlabel,*ylabel,*zlabel;/* labels for each axis */
		int	xgrids, ygrids;		/* grid lines per axis */

				|
				|
				|
			       \ /

		}

We plot data in a linear, semi-log, and log format.  Any leads would be 
appreciated.  

	
-- 
================================================================================
Gregory Conway at Computer Science House    UUCP: ...rochester!ritcv!ritcsh!gregory
Rochester Institute of Technology, Rochester, NY
    "I got an allergy to Perrier, daylight, and responsibility", Marillion