From 828e018afaaa2fd1d3dfa90cfa842c2c87a81924 Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Fri, 8 Oct 2021 14:49:39 +0900
Subject: [PATCH] =?UTF-8?q?bin=20chunk=20=E3=81=AF=20[1]=E3=80=82=20field?=
 =?UTF-8?q?=20=E3=81=AE=E9=A0=86=E7=95=AA=E3=82=92=E6=95=B4=E7=90=86?=
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 =?UTF-8?q?=E3=82=8B=E3=82=B3=E3=83=A1=E3=83=B3=E3=83=88=E3=82=92=E8=BF=BD?=
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---
 Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs | 31 +++++++++++--------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs
index 8196458d5..a1fb057e9 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 
 namespace UniGLTF
 {
@@ -12,27 +11,33 @@ namespace UniGLTF
         /// </summary>
         public string TargetPath { get; }
 
-        /// <summary>
-        /// JSON source
-        /// </summary>
-        public string Json { get; }
-
-        /// <summary>
-        /// GLTF parsed from JSON
-        /// </summary>
-        public glTF GLTF { get; }
-
         /// <summary>
         /// Chunk Data.
         /// Maybe empty if source file was not glb format.
+        /// https://www.khronos.org/registry/glTF/specs/2.0/glTF-2.0.html#chunks
+        /// [0] must JSON
+        /// [1] must BIN
+        /// [2...] may exists.
         /// </summary>
         public IReadOnlyList<GlbChunk> Chunks { get; }
 
         /// <summary>
-        /// Bin chunk bytes
+        /// JSON chunk ToString
+        /// > This chunk MUST be the very first chunk of Binary glTF asset
+        /// </summary>
+        public string Json { get; }
+
+        /// <summary>
+        /// GLTF parsed from JSON chunk
+        /// </summary>
+        public glTF GLTF { get; }
+
+        /// <summary>
+        /// BIN chunk
+        /// > This chunk MUST be the second chunk of the Binary glTF asset
         /// </summary>
         /// <returns></returns>
-        public ArraySegment<byte> Bin => Chunks.First(x => x.ChunkType == GlbChunkType.BIN).Bytes;
+        public ArraySegment<byte> Bin => Chunks[1].Bytes;
 
         /// <summary>
         /// URI access