110583     SURFAC: Graphics Representation of Surfaces by Contour and
Crosshatched Plots with Hidden Lines Removed  Version: October 1982
Submitted by: Russell H. Batt, Kenyon College, Gambier, OH
Operating System: RSTS/E V7.0  Source Language: BASIC PLUS-2,
BASIC-PLUS  Memory Required: 28KW maximum  Software Required: Graphics
subprograms to drive user's graphics device.  Hardware Required:
HP2647A Graphics Term. but can be modified to support other graphics
devices.  Keywords: Graphics
Abstract: SURFAC is a package of three programs, SURGEN.BAS,
MESH.B2S and CONTUR.B2S for producing contour and mesh
(cross-hatched) plots of surfaces defined by single
valued functions Z = f(x,y). The mesh plots are
presented in true perspective with hidden lines removed,
and can be viewed from user selected viewpoints. Input
to each program is driven by a menu. SURGEN evaluates
the user supplied function over a regular rectangular xy
grid, storing the function values in a virtual disk
file, used as input by both MESH and CONTUR. As
supplied, these programs drive a HP2647A Graphics
Terminal, but calls to the device dependent subprograms
are grouped and identified to facilitate replacement by
analogous routines for other graphics devices.
Notes: The Manual listed below consists of a USER'S GUIDE and
PROGRAMMER'S GUIDE which includes listings. Source
listings, cross reference files and binary test data
files are available on magnetic tape.
Media (Service Charge Code): Write-Up and Listing (DB), 600' Magnetic
Tape (MA)  Format: DOS-11

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