static IEnumerable <CPos> RandomWalk(CPos p, Thirdparty.Random r)
{
for (; ;)
{
var dx = r.Next(-1, 2);
var dy = r.Next(-1, 2);
if (dx == 0 && dy == 0)
{
continue;
}
p += new CVec(dx, dy);
yield return(p);
}
}
static IEnumerable <int2> RandomWalk(int2 p, Thirdparty.Random r)
{
for (; ;)
{
var dx = r.Next(-1, 2);
var dy = r.Next(-1, 2);
if (dx == 0 && dy == 0)
{
continue;
}
p.X += dx;
p.Y += dy;
yield return(p);
}
}