public static Coord3D OnUnitShape3D(this Radius r, double distance, IRNG rng)
{
if (rng is null)
{
throw new ArgumentNullException($"rng");
}
int x = 0, y = 0, z = 0;
switch (r)
{
case SquidGrid.Radius.Square:
case SquidGrid.Radius.Diamond:
case SquidGrid.Radius.Circle:
case SquidGrid.Radius.RoughCircle:
Coord p = OnUnitShape(r, distance, rng);
return(new Coord3D(p.X, p.Y, 0)); //2D strategies
case SquidGrid.Radius.Cube:
x = rng.NextInt((int)-distance, (int)distance + 1);
y = rng.NextInt((int)-distance, (int)distance + 1);
z = rng.NextInt((int)-distance, (int)distance + 1);
break;
case SquidGrid.Radius.Octahedron:
case SquidGrid.Radius.Sphere:
do
{
x = rng.NextInt((int)-distance, (int)distance + 1);
y = rng.NextInt((int)-distance, (int)distance + 1);
z = rng.NextInt((int)-distance, (int)distance + 1);
} while (Radius(r, x, y, z) > distance);
break;
}
return(new Coord3D(x, y, z));
}
public static Coord OnUnitShape(this Radius r, double distance, IRNG rng)
{
if (rng is null)
{
throw new ArgumentNullException($"rng");
}
int x = 0, y = 0;
switch (r)
{
case SquidGrid.Radius.Square:
case SquidGrid.Radius.Cube:
x = rng.NextInt((int)-distance, (int)distance + 1);
y = rng.NextInt((int)-distance, (int)distance + 1);
break;
case SquidGrid.Radius.Diamond:
case SquidGrid.Radius.Octahedron:
x = rng.NextInt((int)-distance, (int)distance + 1);
y = rng.NextInt((int)-distance, (int)distance + 1);
if (Radius(r, x, y) > distance)
{
if (x > 0)
{
if (y > 0)
{
x = (int)(distance - x);
y = (int)(distance - y);
}
else
{
x = (int)(distance - x);
y = (int)(-distance - y);
}
}
else
{
if (y > 0)
{
x = (int)(-distance - x);
y = (int)(distance - y);
}
else
{
x = (int)(-distance - x);
y = (int)(-distance - y);
}
}
}
break;
default: // includes CIRCLE, SPHERE, and ROUGH_CIRCLE
double result = distance * Math.Sqrt(rng.NextDouble());
double theta = rng.NextDouble(0, pi2);
x = Convert.ToInt32(Math.Cos(theta) * result);
y = Convert.ToInt32(Math.Sin(theta) * result);
break;
}
return(Coord.Get(x, y));
}