Function:ns2erc

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<code><pre> <code><pre>
 +#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;
 +}
</pre></code> </pre></code>

Current revision

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

ns2vercDraw an arc - vector input.
ns2arcDraw 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.
s2lineDraw 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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