MoonTools.Bonk/Bonk/AABB.cs

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using System;
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using System.Collections.Generic;
using System.Linq;
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using System.Numerics;
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using MoonTools.Core.Structs;
namespace MoonTools.Core.Bonk
{
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/// <summary>
/// Axis-aligned bounding box.
/// </summary>
public struct AABB : IEquatable<AABB>
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{
public float MinX { get; private set; }
public float MinY { get; private set; }
public float MaxX { get; private set; }
public float MaxY { get; private set; }
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public float Width { get { return MaxX - MinX; } }
public float Height { get { return MaxY - MinY; } }
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public static AABB FromTransformedVertices(IEnumerable<Position2D> vertices, Transform2D transform)
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{
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var TransformedVertices = vertices.Select(vertex => Vector2.Transform(vertex, transform.TransformMatrix));
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return new AABB
{
MinX = TransformedVertices.Min(vertex => vertex.X),
MinY = TransformedVertices.Min(vertex => vertex.Y),
MaxX = TransformedVertices.Max(vertex => vertex.X),
MaxY = TransformedVertices.Max(vertex => vertex.Y)
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};
}
public override bool Equals(object obj)
{
return obj is AABB aabb && Equals(aabb);
}
public bool Equals(AABB other)
{
return MinX == other.MinX &&
MinY == other.MinY &&
MaxX == other.MaxX &&
MaxY == other.MaxY;
}
public override int GetHashCode()
{
return HashCode.Combine(MinX, MinY, MaxX, MaxY);
}
public AABB(float minX, float minY, float maxX, float maxY)
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{
MinX = minX;
MinY = minY;
MaxX = maxX;
MaxY = maxY;
}
public static bool operator ==(AABB left, AABB right)
{
return left.Equals(right);
}
public static bool operator !=(AABB left, AABB right)
{
return !(left == right);
}
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}
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}