NAME¶
LINE3 - Draws the straight-line segment joining the projections of two points in
3-space.
SYNOPSIS¶
CALL LINE3 (UA,VA,WA,UB,VB,WB)
C-BINDING SYNOPSIS¶
#include <ncarg/ncargC.h>
void c_line3 (float ua, float va, float wa, float ub,
float vb, float wb)
DESCRIPTION¶
- UA,VA,WA
- (input expressions of type REAL) are the coordinates of the first point in
3-space.
- UB,VB,WB
- (input expressions of type REAL) are the coordinates of the second point
in 3-space.
The statement "CALL LINE3 (UA,VA,WA,UB,VB,WB)" is equivalent to the
three statements "CALL FRST3 (UA,VA,WA)", "CALL VECT3
(UB,VB,,WB)", and "CALL PLOTIF (0.,0.,2), but is slightly more
efficient. To approximate a curve defined by three or more points, though, it
is not efficient to use LINE3, because the first point of each line segment
after the first will be a repeat of the second point of the previous line
segment and will therefore be repeated in the metafile. Thus, to approximate a
curve, you should use FRST3 and VECT3 or CURVE3.
Straight-line segments drawn by LINE3 are drawn in the current polyline color,
as determined by the last call to the GKS routine GSPLCI; by default, color
index 1 is used. Line width is determined by the last call to the GKS routine
GSLWSC; by default, the line width scale factor is 1.
C-BINDING DESCRIPTION¶
The C-binding argument descriptions are the same as the FORTRAN argument
descriptions.
EXAMPLES¶
Use the ncargex command to see the following relevant example: tpwrzt, fthex02.
ACCESS¶
To use LINE3 or c_line3, load the NCAR Graphics libraries ncarg, ncarg_gks, and
ncarg_c, preferably in that order.
SEE ALSO¶
Online: threed, curve3, fence3, frst3, perim3, point3, psym3, pwrz, pwrzt, set3,
threed, tick3, tick43, vect3, ncarg_cbind.
Hardcopy: NCAR Graphics Fundamentals, UNIX Version
COPYRIGHT¶
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.
