/*
┌──────────────────────────────────────────────────────────────────┐
│ Author: Ivan Murzak (https://github.com/IvanMurzak) │
│ Repository: GitHub (https://github.com/IvanMurzak/Unity-MCP) │
│ Copyright (c) 2025 Ivan Murzak │
│ Licensed under the Apache License, Version 2.0. │
│ See the LICENSE file in the project root for more information. │
└──────────────────────────────────────────────────────────────────┘
*/
#nullable enable
using System;
using System.Text.Json;
using System.Text.Json.Nodes;
using com.IvanMurzak.ReflectorNet.Json;
using com.IvanMurzak.ReflectorNet.Utils;
using UnityEngine;
namespace com.IvanMurzak.Unity.MCP.JsonConverters
{
public class Matrix4x4Converter : JsonSchemaConverter<Matrix4x4>, IJsonSchemaConverter
{
// Pre-computed property names to avoid string allocations in the Write loop
private static readonly string[] MatrixPropertyNames =
{
"m00", "m01", "m02", "m03",
"m10", "m11", "m12", "m13",
"m20", "m21", "m22", "m23",
"m30", "m31", "m32", "m33"
};
public override JsonNode GetSchema() => new JsonObject
{
[JsonSchema.Type] = JsonSchema.Object,
[JsonSchema.Properties] = new JsonObject
{
["m00"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m01"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m02"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m03"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m10"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m11"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m12"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m13"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m20"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m21"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m22"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m23"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m30"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m31"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m32"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number },
["m33"] = new JsonObject { [JsonSchema.Type] = JsonSchema.Number }
},
[JsonSchema.Required] = new JsonArray
{
"m00", "m01", "m02", "m03",
"m10", "m11", "m12", "m13",
"m20", "m21", "m22", "m23",
"m30", "m31", "m32", "m33"
},
[JsonSchema.AdditionalProperties] = false
};
public override JsonNode GetSchemaRef() => new JsonObject
{
[JsonSchema.Ref] = JsonSchema.RefValue + Id
};
public override Matrix4x4 Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
if (reader.TokenType != JsonTokenType.StartObject)
throw new JsonException("Expected start of object token.");
float m00 = 0, m01 = 0, m02 = 0, m03 = 0;
float m10 = 0, m11 = 0, m12 = 0, m13 = 0;
float m20 = 0, m21 = 0, m22 = 0, m23 = 0;
float m30 = 0, m31 = 0, m32 = 0, m33 = 0;
while (reader.Read())
{
if (reader.TokenType == JsonTokenType.EndObject)
{
var m = new Matrix4x4();
m.m00 = m00; m.m01 = m01; m.m02 = m02; m.m03 = m03;
m.m10 = m10; m.m11 = m11; m.m12 = m12; m.m13 = m13;
m.m20 = m20; m.m21 = m21; m.m22 = m22; m.m23 = m23;
m.m30 = m30; m.m31 = m31; m.m32 = m32; m.m33 = m33;
return m;
}
if (reader.TokenType == JsonTokenType.PropertyName)
{
var propertyName = reader.GetString();
reader.Read();
switch (propertyName)
{
case "m00": m00 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m01": m01 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m02": m02 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m03": m03 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m10": m10 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m11": m11 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m12": m12 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m13": m13 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m20": m20 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m21": m21 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m22": m22 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m23": m23 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m30": m30 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m31": m31 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m32": m32 = JsonFloatHelper.ReadFloat(ref reader, options); break;
case "m33": m33 = JsonFloatHelper.ReadFloat(ref reader, options); break;
default:
throw new JsonException($"Unexpected property name: {propertyName}.");
}
}
}
throw new JsonException("Expected end of object token.");
}
public override void Write(Utf8JsonWriter writer, Matrix4x4 value, JsonSerializerOptions options)
{
writer.WriteStartObject();
for (int i = 0; i < 16; i++)
{
int row = i / 4;
int col = i % 4;
JsonFloatHelper.WriteFloat(writer, MatrixPropertyNames[i], value[row, col], options);
}
writer.WriteEndObject();
}
}
}
