MoonTools.Bonk/Bonk/Shapes/Circle.cs

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using System;
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using System.Numerics;
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using MoonTools.Structs;
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namespace MoonTools.Bonk
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{
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/// <summary>
/// A Circle is a shape defined by a radius.
/// </summary>
public struct Circle : IShape2D, IEquatable<Circle>
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{
public int Radius { get; }
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public AABB AABB { get; }
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public Circle(int radius)
{
Radius = radius;
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AABB = new AABB(-Radius, -Radius, Radius, Radius);
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}
public Vector2 Support(Vector2 direction, Transform2D transform)
{
return Vector2.Transform(Vector2.Normalize(direction) * Radius, transform.TransformMatrix);
}
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public AABB TransformedAABB(Transform2D transform2D)
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{
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return AABB.Transformed(AABB, transform2D);
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}
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public override bool Equals(object obj)
{
return obj is IShape2D other && Equals(other);
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}
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public bool Equals(IShape2D other)
{
return other is Circle circle && Equals(circle);
}
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public bool Equals(Circle other)
{
return Radius == other.Radius;
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}
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public override int GetHashCode()
{
return HashCode.Combine(Radius);
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}
public static bool operator ==(Circle a, Circle b)
{
return a.Equals(b);
}
public static bool operator !=(Circle a, Circle b)
{
return !(a == b);
}
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}
}