urho3d.UrhoSharp/bindings/external/Plane.cs

using System;
using System.Runtime.InteropServices;

namespace Urho
{
	[StructLayout(LayoutKind.Sequential)]
	public struct Plane
	{
		/// <summary>
		/// Plane normal.
		/// </summary>
		public Vector3 Normal;

		/// <summary>
		/// Plane absolute normal.
		/// </summary>
		public Vector3 AbsNormal;

		/// <summary>
		/// Plane constant.
		/// </summary>
		public float D;

		/// <summary>
		/// Construct from a normal vector and a point on the plane.
		/// </summary>
		public Plane(Vector3 normal, Vector3 point)
		{
			Normal = Vector3.Normalize(normal);
			AbsNormal = new Vector3(Math.Abs(Normal.X), Math.Abs(Normal.Y), Math.Abs(Normal.Z));
			D = - Vector3.Dot(Normal, point);
		}

		/// <summary>
		/// Construct from a 4-dimensional vector, where the w coordinate is the plane parameter.
		/// </summary>
		public Plane(Vector4 plane)
		{
			Normal = new Vector3(plane.X, plane.Y, plane.Z);
			AbsNormal = new Vector3(Math.Abs(plane.X), Math.Abs(plane.Y), Math.Abs(plane.Z));
			D = plane.W;
		}
	}
}