			[200,202] 3D-PLOTTING
			---------------------

Submitted by:	Chris Doran				Date: September 1986
		Sira Ltd., South Hill, Chislehurst, Kent, BR7 5EH, England.
		Tel: +44 1 467 2636,	Telex: 896649,	  FAX: +44 1 467 6515

Some 3-D plotting programs in FORTRAN. Includes CACM Algorithm 475, for
drawing views solid objects, extended for multiple colours, and the
Decus library contour plotting algorithm. Uses the Leeds-Oxford Plotting
library, whose calls include:

	OPENPLOT	initialises plotting
	FRAME		starts a new page
	GREND		finishes plotting
	CRSIZE(HT)	sets character height
	POINT(X,Y)	moves to X,Y
	JOIN(X,Y)	joins current point to X,Y
	BROKEN(N)	draws broken lines, type N
	NEWPEN(N)	changes to pen colour N
	LIMITS(XMIN,XMAX,YMIN,YMAX) sets page size in cm.
	REGION(XMIN,XMAX,YMIN,YMAX) maps user co-ordinates onto LIMITS.
	PLOTNF(X,Y,VAL,NDP) draw REAL VAL at X,Y, to NDP decimal places.
	TYPENI(I)	draw INTEGER I at current position.
	PLOTCL(X,Y,STR,LTH) draw BYTE string STR, length LTH, at X,Y.
	SUPFIX		following text is a superscript, until NORMAL.

Also uses some string handling subroutines from [200,201].

PLOT3D.RNO is such documentation as available.
