#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

static void side(int x0, int y0, int z0,
                 int x1, int y1, int z1,
                 int x2, int y2, int z2)
{
    printf("( %d %d %d ) ( %d %d %d ) ( %d %d %d ) "
           "mtrl/invisible 0 0 0 0.500000 0.500000 0 0 0\n",
           x0, y0, z0, x1, y1, z1, x2, y2, z2);
}

static void lump(int r0, int r1, double a0, double a1)
{
    int x00 = (int) ceil(r0 * cos(M_PI * a0 / 180.0));
    int y00 = (int) ceil(r0 * sin(M_PI * a0 / 180.0));
    int x10 = (int) ceil(r1 * cos(M_PI * a0 / 180.0));
    int y10 = (int) ceil(r1 * sin(M_PI * a0 / 180.0));
    int x01 = (int) ceil(r0 * cos(M_PI * a1 / 180.0));
    int y01 = (int) ceil(r0 * sin(M_PI * a1 / 180.0));
    int x11 = (int) ceil(r1 * cos(M_PI * a1 / 180.0));
    int y11 = (int) ceil(r1 * sin(M_PI * a1 / 180.0));
    int z0  = 0;
    int z1  = 256;

    printf("{\n");

    side(x00, y00, z0, x01, y01, z0, x00, y00, z1);
    side(x10, y10, z1, x11, y11, z1, x10, y10, z0);
    side(x00, y00, z1, x10, y10, z1, x00, y00, z0);
    side(x01, y01, z0, x11, y11, z0, x01, y01, z1);

    side(0, 0, z0, 1, 0, z0, 0, 1, z0);
    side(0, 0, z1, 0, 1, z1, 1, 0, z1);

    printf("}\n");
}

int main(int argc, char *argv[])
{
    int r0 = 128;
    int r1 = 256;
    int n  =   8;
    int a0 =   0;
    int a1 =  90;
    int i;

    if (argc > 1 && strcmp(argv[1], "-?") == 0)
        fprintf(stderr, "Usage: %s <r0> <r1> <n> <a0> <a1>\n", argv[0]);
    else
    {
        if (argc > 1) r0 = atoi(argv[1]);
        if (argc > 2) r1 = atoi(argv[2]);
        if (argc > 3) n  = atoi(argv[3]);
        if (argc > 4) a0 = atoi(argv[4]);
        if (argc > 5) a1 = atoi(argv[5]);

        printf("{\n");
        printf("\"classname\" \"worldspawn\"\n");

        for (i = 0; i < n; i++)
        {
            double ai0 = (double) (i    ) * (a1 - a0) / n + a0;
            double ai1 = (double) (i + 1) * (a1 - a0) / n + a0;

            lump(r0, r1, ai0, ai1);
        }
        
        printf("}\n");
    }
    return 0;
}