ReFuel.Gltf/ReFuel.Gltf/GltfSkin.cs

using System;
using System.Text.Json;

namespace ReFuel.Gltf
{
    public class GltfSkin : GltfIdObject
    {
        private GltfSmartId<GltfAccessor> _inverseBindMatrices = new GltfSmartId<GltfAccessor>();
        private GltfSmartId<GltfNode> _skeleton = new GltfSmartId<GltfNode>();

        public override GltfObjectKind Kind => GltfObjectKind.Skin;

        public string? Name { get; set; }
        public GltfAccessor? InverseBindMatrices
        {
            get => _inverseBindMatrices.IsSet ? _inverseBindMatrices.Value : null;
            set
            {
                if (value is null)
                    _inverseBindMatrices.Reset();
                else
                    _inverseBindMatrices.Value = value;
            }
        }
        public GltfNode? Skeleton
        { 
            get => _skeleton.IsSet ? _skeleton.Value : null;
            set
            {
                if (value is null)
                    _skeleton.Reset();
                else
                    _skeleton.Value = value;
            }
        }

        public GltfRefList<GltfNode> Joints { get; }

        internal GltfSkin(GltfDocument document) : base(document)
        {
            Joints = new GltfRefList<GltfNode>(document.Nodes);
        }

        internal override void Deserialize(JsonElement element)
        {
            AssertObject(element);

            if (!element.TryGetProperty("joints", out JsonElement jointsElement))
                RequiredProperty("joints");
            AssertArray(jointsElement, "joints");

            foreach (JsonElement joint in jointsElement.EnumerateArray())
            {
                Joints.Add(joint.GetInt32());
            }

            foreach (JsonProperty property in element.EnumerateObject())
            {
                switch (property.Name)
                {
                case "inverseBindMatrices":
                    _inverseBindMatrices.Id = property.Value.GetInt32();
                    break;
                case "skeleton":
                    _skeleton.Id = property.Value.GetInt32();
                    break;
                case "name":
                    Name = property.Value.GetString();
                    break;
                }
            }

            DeserializeCommon(element);
        }

        internal override void Serialize(Utf8JsonWriter writer)
        {
            throw new NotImplementedException();
        }
    }
}