80 lines
3.2 KiB
C#
80 lines
3.2 KiB
C#
#region License
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// The MIT License (MIT)
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//
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// Copyright (c) 2020 Wanzyee Studio
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#endregion
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using System.Collections.Generic;
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using System.Linq;
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using Newtonsoft.Json.UnityConverters.Helpers;
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using UnityEngine;
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namespace Newtonsoft.Json.UnityConverters.Math
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{
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/// <summary>
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/// Custom Newtonsoft.Json converter <see cref="JsonConverter"/> for the Unity Matrix4x4 type <see cref="Matrix4x4"/>.
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/// </summary>
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public class Matrix4x4Converter : PartialConverter<Matrix4x4>
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{
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// https://github.com/Unity-Technologies/UnityCsReference/blob/2019.2/Runtime/Export/Math/Matrix4x4.cs#L21-L29
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private static readonly string[] _names = GetMemberNames();
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private static readonly Dictionary<string, int> _namesToIndex = GetNamesToIndex(_names);
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/// <summary>
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/// Get the property names include from <c>m00</c> to <c>m33</c>.
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/// </summary>
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/// <returns>The property names.</returns>
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private static string[] GetMemberNames()
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{
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string[] indexes = new[] { "0", "1", "2", "3" };
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return indexes.SelectMany((row) => indexes.Select((column) => "m" + column + row)).ToArray();
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}
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// Reusing the same strings here instead of creating new ones. Tiny bit lower memory footprint
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private static Dictionary<string, int> GetNamesToIndex(string[] names)
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{
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var dict = new Dictionary<string, int>();
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for (int i = 0; i < names.Length; i++)
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{
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dict[names[i]] = i;
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}
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return dict;
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}
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protected override void ReadValue(ref Matrix4x4 value, string name, JsonReader reader, JsonSerializer serializer)
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{
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if (_namesToIndex.TryGetValue(name, out var index))
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{
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value[index] = reader.ReadAsFloat() ?? 0;
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}
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}
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protected override void WriteJsonProperties(JsonWriter writer, Matrix4x4 value, JsonSerializer serializer)
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{
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for (int i = 0; i < _names.Length; i++)
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{
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writer.WritePropertyName(_names[i]);
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writer.WriteValue(value[i]);
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}
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}
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}
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}
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