Function:ns2erc
From S2PLOT
Revision as of 03:30, 29 August 2011; view current revision
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ns2erc
Draw an arc.
Prototype
void ns2erc(float px, float py, float pz,
float nx, float ny, float nz,
float sx, float sy, float sz,
float deg, int nseg, float axratio);
Description
Draw an arc with specified major/minor axis ratio. The major axis is given by the starting vector.
See Also
| ns2verc | Draw an arc - vector input. |
| ns2arc | Draw an arc at (px,py,pz) with normal (nx,ny,nz) in current pen (thickness,colour). |
| ns2varc | Draw an arc at (px,py,pz) with normal (nx,ny,nz) in current pen (thickness,colour) - vector input. |
| s2line | Draw a poly line, n vertices at (xpts, ypts, zpts). |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
float px, py, pz; /* Position */
float nx, ny, nz; /* Normal */
float sx, sy, sz; /* Starting vector */
float deg = 180.0; /* Angular extent */
int nseg = 48; /* Number of segments */
s2opend("/?",argc, argv); /* Open the display */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
px = 0.0; py = 0.0; pz = 0.0; /* Set position */
nx = 0.0; ny = 1.0; nz = 1.0; /* Normal vector */
sx = 1.0; sy = 0.0; sz = 0.0; /* Starting vector */
s2slw(3); /* Set line width */
s2sci(S2_PG_YELLOW); /* Set the colour */
float axratio = 0.5;
ns2erc(px,py,pz, nx,ny,nz, sx,sy,sz, deg, nseg, axratio);
/* Draw the arc */
s2show(1); /* Open the s2plot window */
return 1;
}
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