| | | 1 | | // Copyright (c) 2020-2024 dotBunny Inc. |
| | | 2 | | // dotBunny licenses this file to you under the BSL-1.0 license. |
| | | 3 | | // See the LICENSE file in the project root for more information. |
| | | 4 | | |
| | | 5 | | using System; |
| | | 6 | | using System.Runtime.CompilerServices; |
| | | 7 | | using Unity.Mathematics; |
| | | 8 | | |
| | | 9 | | namespace GDX.Collections.Generic |
| | | 10 | | { |
| | | 11 | | /// <summary> |
| | | 12 | | /// A three-dimensional array backed a flat array. |
| | | 13 | | /// </summary> |
| | | 14 | | /// <typeparam name="T">Type of objects.</typeparam> |
| | | 15 | | public struct Array3D<T> : IDisposable |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// The backing flat array. |
| | | 19 | | /// </summary> |
| | | 20 | | public T[] Array; |
| | | 21 | | |
| | | 22 | | /// <summary> |
| | | 23 | | /// The stride of the z-axis segment in <see cref="Array" />. |
| | | 24 | | /// </summary> |
| | | 25 | | public readonly int Depth; |
| | | 26 | | |
| | | 27 | | /// <summary> |
| | | 28 | | /// The total length of a single <see cref="Depth" />. |
| | | 29 | | /// </summary> |
| | | 30 | | public readonly int DepthLength; |
| | | 31 | | |
| | | 32 | | /// <summary> |
| | | 33 | | /// The stride of the y-axis segment in <see cref="Array" />. |
| | | 34 | | /// </summary> |
| | | 35 | | public readonly int Height; |
| | | 36 | | |
| | | 37 | | /// <summary> |
| | | 38 | | /// The length of <see cref="Array" />. |
| | | 39 | | /// </summary> |
| | | 40 | | public readonly int Length; |
| | | 41 | | |
| | | 42 | | /// <summary> |
| | | 43 | | /// The stride of the x-axis segment in <see cref="Array" />. |
| | | 44 | | /// </summary> |
| | | 45 | | public readonly int Width; |
| | | 46 | | |
| | | 47 | | /// <summary> |
| | | 48 | | /// Create a <see cref="Array3D{T}" /> with a uniform dimensional length. |
| | | 49 | | /// </summary> |
| | | 50 | | /// <remarks></remarks> |
| | | 51 | | /// <param name="width">X-axis length.</param> |
| | | 52 | | /// <param name="height">Y-axis length.</param> |
| | | 53 | | /// <param name="depth">Z-axis length.</param> |
| | | 54 | | public Array3D(int width, int height, int depth) |
| | 10 | 55 | | { |
| | 10 | 56 | | Width = width; |
| | 10 | 57 | | Height = height; |
| | 10 | 58 | | DepthLength = width * height; |
| | 10 | 59 | | Depth = depth; |
| | 10 | 60 | | Length = width * height * depth; |
| | 10 | 61 | | Array = new T[Length]; |
| | 10 | 62 | | } |
| | | 63 | | |
| | | 64 | | /// <summary> |
| | | 65 | | /// Access a specific location in the voxel. |
| | | 66 | | /// </summary> |
| | | 67 | | /// <param name="x">X location index.</param> |
| | | 68 | | /// <param name="y">Y location index.</param> |
| | | 69 | | /// <param name="z">Z location index.</param> |
| | | 70 | | public T this[int x, int y, int z] |
| | | 71 | | { |
| | | 72 | | [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| | 1 | 73 | | get => Array[x + Width * (y + Height * z)]; |
| | | 74 | | |
| | | 75 | | [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| | 1 | 76 | | set => Array[x + Width * (y + Height * z)] = value; |
| | | 77 | | } |
| | | 78 | | |
| | | 79 | | /// <summary> |
| | | 80 | | /// Access a specific location in the voxel. |
| | | 81 | | /// </summary> |
| | | 82 | | /// <param name="index">A three-dimensional index.</param> |
| | | 83 | | public T this[int3 index] |
| | | 84 | | { |
| | | 85 | | [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| | 1 | 86 | | get => Array[index.x + Width * (index.y + Height * index.z)]; |
| | | 87 | | |
| | | 88 | | [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| | 1 | 89 | | set => Array[index.x + Width * (index.y + Height * index.z)] = value; |
| | | 90 | | } |
| | | 91 | | |
| | | 92 | | /// <summary> |
| | | 93 | | /// Properly dispose of the <see cref="Array3D{T}" />. |
| | | 94 | | /// </summary> |
| | | 95 | | public void Dispose() |
| | 0 | 96 | | { |
| | 0 | 97 | | Array = default; |
| | 0 | 98 | | } |
| | | 99 | | |
| | | 100 | | /// <summary> |
| | | 101 | | /// Get the three-dimensional index of a flat array index. |
| | | 102 | | /// </summary> |
| | | 103 | | /// <param name="index">A flat array index.</param> |
| | | 104 | | /// <returns>A three-dimensional voxel index.</returns> |
| | | 105 | | public int3 GetFromIndex(int index) |
| | 5 | 106 | | { |
| | 5 | 107 | | int x = index % Width; |
| | 5 | 108 | | int y = (index - x) / Width % Height; |
| | 5 | 109 | | int z = index / DepthLength; |
| | | 110 | | |
| | 5 | 111 | | return new int3(x, y, z); |
| | 5 | 112 | | } |
| | | 113 | | |
| | | 114 | | public int GetFromIndex(int3 index) |
| | 0 | 115 | | { |
| | 0 | 116 | | return index.x + Width * (index.y + Height * index.z); |
| | 0 | 117 | | } |
| | | 118 | | } |
| | | 119 | | } |