80 lines
2.2 KiB
C#
80 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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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>
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/// Axis-aligned bounding box in 3 dimensions.
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/// </summary>
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public struct AABB3D : IEquatable<AABB3D>
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{
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public Vector3 Min { get; private set; }
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public Vector3 Max { get; private set; }
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public float Width { get { return Max.X - Min.X; } }
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public float Height { get { return Max.Y - Min.Y; } }
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public float Depth { get { return Max.Z - Min.Z; } }
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public AABB3D(float minX, float minY, float minZ, float maxX, float maxY, float maxZ)
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{
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Min = new Vector3(minX, minY, minZ);
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Max = new Vector3(maxX, maxY, maxZ);
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}
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public AABB3D(Vector3 min, Vector3 max)
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{
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Min = min;
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Max = max;
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}
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public static bool TestOverlap(AABB3D a, AABB3D b)
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{
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return
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a.Min.X <= b.Max.X &&
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a.Max.X >= b.Min.X &&
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a.Min.Y <= b.Max.Y &&
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a.Max.Y >= b.Min.Y &&
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a.Min.Z <= b.Max.Z &&
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a.Max.Z >= b.Min.Z;
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}
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public AABB3D Merge(AABB3D other)
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{
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return new AABB3D(
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Vector3.Min(Min, other.Min),
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Vector3.Max(Max, other.Max)
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);
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}
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public IEnumerable<Vector3> AABBCorners()
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{
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yield return Min;
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yield return new Vector3(Min.X, Min.Y, Max.Z);
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yield return new Vector3(Min.X, Max.Y, Min.Z);
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yield return new Vector3(Max.X, Min.Y, Min.Z);
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yield return new Vector3(Min.X, Max.Y, Max.Z);
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yield return new Vector3(Max.X, Min.Y, Max.Z);
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yield return new Vector3(Max.X, Max.Y, Min.Z);
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yield return Max;
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}
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public override bool Equals(object obj)
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{
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return obj is AABB3D d && Equals(d);
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}
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public override int GetHashCode()
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{
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return HashCode.Combine(Min, Max);
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}
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public bool Equals(AABB3D other)
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{
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return Min == other.Min && Max == other.Max;
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}
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}
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}
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