ref: 14cfa56253beb8a2ad8e4700c8c26a6ff6d16ee7
dir: /sys/src/cmd/plot/libplot/poly.c/
#include "mplot.h"
void plotpoly(int num[], double *ff[]){
double *xp, *yp, **fp;
int i, *n;
n = num;
fp = ff;
while((i = *n++)){
xp = *fp++;
yp = xp+1;
move(*xp, *yp);
while(--i){
xp += 2;
yp += 2;
vec(*xp, *yp);
}
}
}