/// <summary>
/// Initializes the smallest box that contains a set of points.
/// </summary>
/// <param name="basePlane">Orientation of the box.</param>
/// <param name="points">Points to include, Invalid points will be ignored.</param>
public Box(Plane basePlane, IEnumerable <Point3d> points)
{
// David: this code is untested.
m_dx = new Interval(+1, -1);
m_dy = new Interval(0, 0);
m_dz = new Interval(0, 0);
m_plane = basePlane;
if (!m_plane.IsValid)
{
return;
}
if (points == null)
{
return;
}
double x0 = double.MaxValue;
double x1 = double.MinValue;
double y0 = double.MaxValue;
double y1 = double.MinValue;
double z0 = double.MaxValue;
double z1 = double.MinValue;
int N = 0;
foreach (Point3d pt in points)
{
if (!pt.IsValid)
{
continue;
}
N++;
Point3d pt_mapped;
m_plane.RemapToPlaneSpace(pt, out pt_mapped);
x0 = Math.Min(x0, pt_mapped.m_x);
x1 = Math.Max(x1, pt_mapped.m_x);
y0 = Math.Min(y0, pt_mapped.m_y);
y1 = Math.Max(y1, pt_mapped.m_y);
z0 = Math.Min(z0, pt_mapped.m_z);
z1 = Math.Max(z1, pt_mapped.m_z);
}
if (N == 0)
{
return;
}
m_dx = new Interval(x0, x1);
m_dy = new Interval(y0, y1);
m_dz = new Interval(z0, z1);
MakeValid();
}
/// <summary>
/// Finds the closest point on or in the Box. The box should be Valid for this to work.
/// </summary>
/// <param name="point">Sample point.</param>
/// <returns>The point on or in the box that is closest to the sample point.</returns>
public Point3d ClosestPoint(Point3d point)
{
// David: This code is untested.
// Remap point to m_plane coordinates
Point3d pt;
if (!m_plane.RemapToPlaneSpace(point, out pt))
{
return(Point3d.Unset);
}
// Project x, y and z onto/into the box
double x = pt.m_x;
double y = pt.m_y;
double z = pt.m_z;
x = Math.Max(x, m_dx.T0);
y = Math.Max(y, m_dy.T0);
z = Math.Max(z, m_dz.T0);
x = Math.Min(x, m_dx.T1);
y = Math.Min(y, m_dy.T1);
z = Math.Min(z, m_dz.T1);
return(m_plane.PointAt(x, y, z));
}