2019-12-09 03:46:08 +00:00
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using System;
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2019-09-06 08:11:58 +00:00
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using System.Collections.Generic;
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2019-10-31 23:19:30 +00:00
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using System.Numerics;
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2019-09-06 08:11:58 +00:00
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using MoonTools.Core.Structs;
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namespace MoonTools.Core.Bonk
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{
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2019-10-25 21:01:36 +00:00
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/// <summary>
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/// Axis-aligned bounding box.
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/// </summary>
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2019-12-09 03:46:08 +00:00
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public struct AABB : IEquatable<AABB>
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2019-09-06 08:11:58 +00:00
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{
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2019-09-19 00:00:43 +00:00
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public float MinX { get; private set; }
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public float MinY { get; private set; }
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public float MaxX { get; private set; }
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public float MaxY { get; private set; }
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2019-09-06 08:11:58 +00:00
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2019-09-19 00:00:43 +00:00
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public float Width { get { return MaxX - MinX; } }
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public float Height { get { return MaxY - MinY; } }
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2019-09-06 08:11:58 +00:00
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2019-09-06 20:00:35 +00:00
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public static AABB FromTransformedVertices(IEnumerable<Position2D> vertices, Transform2D transform)
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2019-09-06 08:11:58 +00:00
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{
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2019-12-30 05:09:28 +00:00
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float minX = float.MaxValue;
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float minY = float.MaxValue;
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float maxX = float.MinValue;
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float maxY = float.MinValue;
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foreach (var vertex in vertices)
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{
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var transformedVertex = Vector2.Transform(vertex, transform.TransformMatrix);
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if (transformedVertex.X < minX)
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{
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minX = transformedVertex.X;
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}
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if (transformedVertex.Y < minY)
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{
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minY = transformedVertex.Y;
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}
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if (transformedVertex.X > maxX)
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{
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maxX = transformedVertex.X;
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}
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if (transformedVertex.Y > maxY)
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{
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maxY = transformedVertex.Y;
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}
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}
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2019-09-06 08:11:58 +00:00
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return new AABB
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{
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2019-12-30 05:09:28 +00:00
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MinX = minX,
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MinY = minY,
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MaxX = maxX,
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MaxY = maxY
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2019-09-06 08:11:58 +00:00
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};
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}
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2019-12-09 03:46:08 +00:00
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public override bool Equals(object obj)
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{
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return obj is AABB aabb && Equals(aabb);
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}
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public bool Equals(AABB other)
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{
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return MinX == other.MinX &&
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MinY == other.MinY &&
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MaxX == other.MaxX &&
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MaxY == other.MaxY;
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}
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public override int GetHashCode()
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{
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return HashCode.Combine(MinX, MinY, MaxX, MaxY);
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}
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2019-09-19 00:00:43 +00:00
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public AABB(float minX, float minY, float maxX, float maxY)
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2019-09-06 08:11:58 +00:00
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{
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MinX = minX;
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MinY = minY;
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MaxX = maxX;
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MaxY = maxY;
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}
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2019-12-09 03:46:08 +00:00
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public static bool operator ==(AABB left, AABB right)
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{
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return left.Equals(right);
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}
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public static bool operator !=(AABB left, AABB right)
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{
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return !(left == right);
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}
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2019-09-06 08:11:58 +00:00
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}
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2019-12-16 18:51:27 +00:00
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}
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