README.rst

S2PLOT (GEM by Chris Fluke, 26/04/2017)

• Presentation (pdf)

Example codes

• Hello Interactive 3D World

#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"

int main(int argc, char *argv[])
{
    s2opend("/?",argc, argv);                 /* Open the display */
    s2swin(-1.,1., -1.,1., -1.,1.);           /* Set the window coordinates */

    /* Draw the coordinate box: character strings give formatting options */
    s2box("BCDETMNOPQ", 0,0, "BCDETMNOPQ", 0,0, "BDECTMNOPQ", 0,0);

    s2lab("X-axis","Y-axis","Z-axis","Plot"); /* Write some labels */

    s2show(1);                                        /* Open the s2plot window */

    return EXIT_SUCCESS;
}

• Randomly Coloured 3D Points

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"

int main(int argc, char *argv[])
{
    srand48((long)time(NULL));                        /* Alway seed your RNG! */

    s2opend("/?",argc, argv);                 /* Open the display */
    s2swin(-1.,1., -1.,1., -1.,1.);           /* Set the window coordinates */

    /* Draw the coordinate box: character strings give formatting options */
    s2box("BCDETMNOPQ", 0,0, "BCDETMNOPQ", 0,0, "BDECTMNOPQ", 0,0);

    s2lab("X-axis","Y-axis","Z-axis","Plot"); /* Write some labels */

    int N = 1000;                             /* How many points to plot? */
    XYZ xyz;                                  /* A vector position */
    COLOUR col;                                       /* An RGB colour */
    for (int i=0;i<N;i++) {
        xyz.x = drand48()*2.0 - 1.0;          /* Random coordinate in [-1..1] */
        xyz.y = drand48()*2.0 - 1.0;
        xyz.z = drand48()*2.0 - 1.0;

        col.r = drand48();                    /* Random colour map in [0..1] */
        col.g = drand48();
        col.b = drand48();

        ns2vpoint(xyz, col);                  /* Plot the point using the colour */
    }

    s2show(1);                                        /* Open the s2plot window */

    return EXIT_SUCCESS;
}

• Randomly Coloured 3D Spheres

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"

int main(int argc, char *argv[])
{
    srand48((long)time(NULL));                        /* Alway seed your RNG! */

    s2opend("/?",argc, argv);                 /* Open the display */
    s2swin(-1.,1., -1.,1., -1.,1.);           /* Set the window coordinates */

    /* Draw the coordinate box: character strings give formatting options */
    s2box("BCDETMNOPQ", 0,0, "BCDETMNOPQ", 0,0, "BDECTMNOPQ", 0,0);

    s2lab("X-axis","Y-axis","Z-axis","Plot"); /* Write some labels */


    int N = 1000;                             /* How many points to plot? */
    XYZ xyz;                                  /* A vector position */
    COLOUR col;                                       /* An RGB colour */

    float radius = 0.1;                               /* Radius of a sphere */
    ss2ssr(10);                                       /* Set the resolution of the sphere */

    for (int i=0;i<N;i++) {
        xyz.x = drand48()*2.0 - 1.0;          /* Random coordinate in [-1..1] */
        xyz.y = drand48()*2.0 - 1.0;
        xyz.z = drand48()*2.0 - 1.0;

        col.r = drand48();                    /* Random colour map in [0..1] */
        col.g = drand48();
        col.b = drand48();

        ns2vsphere(xyz, radius, col);         /* Draw a sphere using using the colour */
    }

    s2show(1);                                        /* Open the s2plot window */

    return EXIT_SUCCESS;
}