MoonTools.Bonk/Bonk/MinkowskiDifference.cs

60 lines
1.7 KiB
C#

using System;
using System.Numerics;
using MoonTools.Structs;
namespace MoonTools.Bonk
{
/// <summary>
/// A Minkowski difference between two shapes.
/// </summary>
public struct MinkowskiDifference : IEquatable<MinkowskiDifference>
{
private IShape2D ShapeA { get; }
private Transform2D TransformA { get; }
private IShape2D ShapeB { get; }
private Transform2D TransformB { get; }
public MinkowskiDifference(IShape2D shapeA, Transform2D transformA, IShape2D shapeB, Transform2D transformB)
{
ShapeA = shapeA;
TransformA = transformA;
ShapeB = shapeB;
TransformB = transformB;
}
public Vector2 Support(Vector2 direction)
{
return ShapeA.Support(direction, TransformA) - ShapeB.Support(-direction, TransformB);
}
public override bool Equals(object other)
{
return other is MinkowskiDifference minkowskiDifference && Equals(minkowskiDifference);
}
public bool Equals(MinkowskiDifference other)
{
return
ShapeA == other.ShapeA &&
TransformA == other.TransformA &&
ShapeB == other.ShapeB &&
TransformB == other.TransformB;
}
public override int GetHashCode()
{
return HashCode.Combine(ShapeA, TransformA, ShapeB, TransformB);
}
public static bool operator ==(MinkowskiDifference a, MinkowskiDifference b)
{
return a.Equals(b);
}
public static bool operator !=(MinkowskiDifference a, MinkowskiDifference b)
{
return !(a == b);
}
}
}