2 * Generates the repetitive part of the gnuplot input
3 * for generating the initial triangle vertices from SGT's
10 int main(int argc, const char **argv) {
11 static const int prec= DBL_DIG+2;
14 if (argc>1) { fputs("no args please\n",stderr); exit(8); }
16 printf("print %d, %d, %d, %d, %d\n", DIM, N, X, Y, D3);
19 int x= vi & XMASK; /* distance along strip */
20 int y= vi >> YSHIFT; /* distance across strip */
21 double u= y * 1.0 / (Y-1); /* SGT's u runs 0..1 across the strip */
23 /* SGT's v runs 0..pi along the strip, where the join is at 0==pi.
24 * So that corresponds to 0..X (since 0==X in our scheme). */
25 double v= (x*2 + (y&1)) * M_PI / (X*2);
27 K printf("print %c%c( %-*.*g, %-*.*g); # %03x %2d %2d\n",
29 prec+5,prec,u, prec+5,prec,v,