117 lines
3.2 KiB
C#
117 lines
3.2 KiB
C#
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namespace Octree
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{
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using System;
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using System.Runtime.Serialization;
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//
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// a*x + b*y + c*z + d = 0
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//
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[Serializable]
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public class Plane
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{
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private Point _point;
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private Point _normal;
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private double _d;
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/// <summary>
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/// Gets or sets the D parameter of the plane.
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/// </summary>
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public double D
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{
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get { return _d; }
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set
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{
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_d = value;
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_point.Coor = (_normal * -_d).Coor;
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}
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}
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/// <summary>
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/// Gets or sets the plane normal.
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/// </summary>
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public Point Normal
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{
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get { return _normal; }
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set
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{
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_normal.Coor = value.Coor;
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// point remains the same
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_d = -(Point.Dot(_normal, _point));
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}
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}
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/// <summary>
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/// Gets or sets the plane point.
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/// </summary>
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public Point Point
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{
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get
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{
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return _point;
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}
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set
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{
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_point.Coor = value.Coor;
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// normal remains the same
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_d = -(Point.Dot(_normal, _point));
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}
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}
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/// <summary>
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/// Creates a new plane with the given parameters.
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/// </summary>
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/// <param name="point">The point on the plane.</param>
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/// <param name="normal">The normal of the plane.</param>
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public Plane(double[] point, double[] normal)
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{
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SetPointAndNormal(point, normal);
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}
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/// <summary>
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/// Creates a new plane with the given parameters.
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/// </summary>
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/// <param name="a">The a parameter of the plane.</param>
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/// <param name="b">The b parameter of the plane.</param>
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/// <param name="c">The c parameter of the plane.</param>
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/// <param name="d">The d parameter of the plane.</param>
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public Plane(double a, double b, double c, double d)
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{
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_normal = new Point(a, b, c).Normalized;
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_d = d;
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_point = _normal * -_d;
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}
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/// <summary>
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/// Creates a new plane with the given nornal and d parameter.
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/// </summary>
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/// <param name="normal">The normal of the plane.</param>
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/// <param name="d">The d parameter of the plane.</param>
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public Plane(Point normal, double d)
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{
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_normal = normal.Normalized;
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_d = d;
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_point = _normal * -_d;
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}
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public void SetPointAndNormal(double[] point, double[] normal)
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{
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_point = new Point(point);
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_normal = new Point(normal).Normalized;
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_d = -(Point.Dot(_normal, _point));
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}
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/// <summary>
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/// Returns the distance between the plane and point.
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/// </summary>
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/// <param name="plane">The plane.</param>
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/// <param name="point">The point.</param>
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/// <returns>The distance.</returns>
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public static double Distance(Plane plane, Point point)
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{
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return Point.Dot(plane.Normal, point) + plane.D;
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}
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}
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}
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