From 814b56e5e2c6da331c6b4f71b5f167ff2fa5afb1 Mon Sep 17 00:00:00 2001
From: wuxq <wuxiaoqian88@126.com>
Date: Sat, 28 Apr 2018 15:05:21 +0800
Subject: [PATCH 1/2] multi joint has bug  with ReplaceData

multi joint has  a bug  in ReplaceData_joint with "bin" change
---
 code/glTF2Exporter.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/code/glTF2Exporter.cpp b/code/glTF2Exporter.cpp
index fcf8005ae..9bd9bae33 100644
--- a/code/glTF2Exporter.cpp
+++ b/code/glTF2Exporter.cpp
@@ -642,9 +642,8 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
         unsigned int bytesLen = vertexJointAccessor->bufferView->byteLength;
         unsigned int s_bytesPerComp= ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
         unsigned int bytesPerComp = ComponentTypeSize(vertexJointAccessor->componentType);
-        unsigned int s_bytesLen = bytesLen * s_bytesPerComp / bytesPerComp;
         Ref<Buffer> buf = vertexJointAccessor->bufferView->buffer;
-        uint8_t* arrys = new uint8_t[s_bytesLen];
+        uint8_t* arrys = new uint8_t[bytesLen];
         unsigned int i = 0;
         for ( unsigned int j = 0; j <= bytesLen; j += bytesPerComp ){
             size_t len_p = offset + j;
@@ -655,7 +654,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
             memcpy(&arrys[i*s_bytesPerComp], data, s_bytesPerComp);
             ++i;
         }
-        buf->ReplaceData_joint(offset, bytesLen, arrys, s_bytesLen);
+        buf->ReplaceData_joint(offset, bytesLen, arrys, bytesLen);
         vertexJointAccessor->componentType = ComponentType_UNSIGNED_SHORT;
 
         p.attributes.joint.push_back( vertexJointAccessor );

From cc1bde0514773ff9b96ca2284215e20545017f4a Mon Sep 17 00:00:00 2001
From: wuxq <wuxiaoqian88@126.com>
Date: Tue, 8 May 2018 18:31:27 +0800
Subject: [PATCH 2/2] change the length of bufferView byteLength

chang the joint  attribute bufferView byteLength
---
 code/glTF2Exporter.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/code/glTF2Exporter.cpp b/code/glTF2Exporter.cpp
index 431046d72..041250bee 100644
--- a/code/glTF2Exporter.cpp
+++ b/code/glTF2Exporter.cpp
@@ -642,6 +642,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
         unsigned int bytesLen = vertexJointAccessor->bufferView->byteLength;
         unsigned int s_bytesPerComp= ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
         unsigned int bytesPerComp = ComponentTypeSize(vertexJointAccessor->componentType);
+        unsigned int s_bytesLen = bytesLen * s_bytesPerComp / bytesPerComp;
         Ref<Buffer> buf = vertexJointAccessor->bufferView->buffer;
         uint8_t* arrys = new uint8_t[bytesLen];
         unsigned int i = 0;
@@ -656,6 +657,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
         }
         buf->ReplaceData_joint(offset, bytesLen, arrys, bytesLen);
         vertexJointAccessor->componentType = ComponentType_UNSIGNED_SHORT;
+        vertexJointAccessor->bufferView->byteLength = s_bytesLen;
 
         p.attributes.joint.push_back( vertexJointAccessor );
     }