MoonTools.Bonk/Bonk/Shapes/Circle.cs

70 lines
1.7 KiB
C#

using System;
using System.Numerics;
using MoonTools.Core.Structs;
namespace MoonTools.Core.Bonk
{
/// <summary>
/// A Circle is a shape defined by a radius.
/// </summary>
public struct Circle : IShape2D, IEquatable<IShape2D>
{
public int Radius { get; private set; }
public Circle(int radius)
{
Radius = radius;
}
public Vector2 Support(Vector2 direction, Transform2D transform)
{
return Vector2.Transform(Vector2.Normalize(direction) * Radius, transform.TransformMatrix);
}
public AABB AABB(Transform2D transform2D)
{
return new AABB(
transform2D.Position.X - Radius * transform2D.Scale.X,
transform2D.Position.Y - Radius * transform2D.Scale.Y,
transform2D.Position.X + Radius * transform2D.Scale.X,
transform2D.Position.Y + Radius * transform2D.Scale.Y
);
}
public override bool Equals(object obj)
{
if (obj is Circle other)
{
return Equals(other);
}
return false;
}
public bool Equals(IShape2D other)
{
if (other is Circle circle)
{
return Radius == circle.Radius;
}
return false;
}
public override int GetHashCode()
{
return 598075851 + Radius.GetHashCode();
}
public static bool operator ==(Circle a, Circle b)
{
return a.Equals(b);
}
public static bool operator !=(Circle a, Circle b)
{
return !(a == b);
}
}
}