/// <summary>
/// Utility function for creating a PlaneSurface through a Box.
/// </summary>
/// <param name="plane">Plane to extend.</param>
/// <param name="box">Box to extend through.</param>
/// <param name="fuzzyness">Box will be inflated by this amount.</param>
/// <returns>A Plane surface through the box or null.</returns>
internal static PlaneSurface ExtendThroughBox(Plane plane, BoundingBox box, double fuzzyness)
{
if (fuzzyness != 0.0) { box.Inflate(fuzzyness); }
Point3d[] corners = box.GetCorners();
int side = 0;
bool valid = false;
for (int i = 0; i < corners.Length; i++)
{
double d = plane.DistanceTo(corners[i]);
if (d == 0.0) { continue; }
if (d < 0.0)
{
if (side > 0) { valid = true; break; }
side = -1;
}
else
{
if (side < 0) { valid = true; break; }
side = +1;
}
}
if (!valid) { return null; }
Interval s, t;
if (!plane.ExtendThroughBox(box, out s, out t)) { return null; }
if (s.IsSingleton || t.IsSingleton)
return null;
return new PlaneSurface(plane, s, t);
}
