feat(package): voronoi: simple voronoi algoritm realization

package/voronoi/gen-voronoi-points.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+# posix: uniform points in a 2D parallelogram for Voronoi seeds
+# usage: ./gen N x0 y0 ax ay bx by
+# generates N points p = (x0,y0) + u*(ax,ay) + v*(bx,by), with u,v ~ U[0,1)
+
+[ "$#" -eq 7 ] || { echo "usage: $0 N x0 y0 ax ay bx by" >&2; exit 1; }
+
+awk -v n="$1" -v x0="$2" -v y0="$3" -v ax="$4" -v ay="$5" -v bx="$6" -v by="$7" '
+BEGIN{
+  srand();
+  for(i=0;i<n;i++){
+    u = rand(); v = rand();
+    x = int(x0 + u*ax + v*bx);
+    y = int(y0 + u*ay + v*by);
+    printf "%d,%d ", x, y;
+  }
+}'