From 5470f5fb2806377fcd8abefd45cdf7315b7f5e61 Mon Sep 17 00:00:00 2001
From: YoheiKakiuchi <youhei@jsk.imi.i.u-tokyo.ac.jp>
Date: Sat, 27 Jul 2013 10:34:48 +0900
Subject: [PATCH] add AI_CONFIG_IMPORT_COLLADA_IGNORE_UP_DIRECTION for not
 transforming position of vertices

---
 code/ColladaLoader.cpp  | 31 ++++++++++++++++---------------
 code/ColladaLoader.h    |  1 +
 include/assimp/config.h |  4 +++-
 3 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/code/ColladaLoader.cpp b/code/ColladaLoader.cpp
index 662f31532..a97ea2c6a 100644
--- a/code/ColladaLoader.cpp
+++ b/code/ColladaLoader.cpp
@@ -73,7 +73,7 @@ static const aiImporterDesc desc = {
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 ColladaLoader::ColladaLoader()
-: noSkeletonMesh()
+: noSkeletonMesh(), ignoreUpDirection(false)
 {}
 
 // ------------------------------------------------------------------------------------------------
@@ -108,6 +108,7 @@ bool ColladaLoader::CanRead( const std::string& pFile, IOSystem* pIOHandler, boo
 void ColladaLoader::SetupProperties(const Importer* pImp)
 {
 	noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES,0) != 0;
+	ignoreUpDirection = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_COLLADA_IGNORE_UP_DIRECTION,0) != 0;
 }
 
 
@@ -160,21 +161,21 @@ void ColladaLoader::InternReadFile( const std::string& pFile, aiScene* pScene, I
                                                           0,  parser.mUnitSize,  0,  0,
                                                           0,  0,  parser.mUnitSize,  0,
                                                           0,  0,  0,  1);
-
+        if( !ignoreUpDirection ) {
         // Convert to Y_UP, if different orientation
-	if( parser.mUpDirection == ColladaParser::UP_X)
-		pScene->mRootNode->mTransformation *= aiMatrix4x4( 
-			 0, -1,  0,  0, 
-			 1,  0,  0,  0,
-			 0,  0,  1,  0,
-			 0,  0,  0,  1);
-	else if( parser.mUpDirection == ColladaParser::UP_Z)
-		pScene->mRootNode->mTransformation *= aiMatrix4x4( 
-			 1,  0,  0,  0, 
-			 0,  0,  1,  0,
-			 0, -1,  0,  0,
-			 0,  0,  0,  1);
-
+		if( parser.mUpDirection == ColladaParser::UP_X)
+			pScene->mRootNode->mTransformation *= aiMatrix4x4( 
+				 0, -1,  0,  0, 
+				 1,  0,  0,  0,
+				 0,  0,  1,  0,
+				 0,  0,  0,  1);
+		else if( parser.mUpDirection == ColladaParser::UP_Z)
+			pScene->mRootNode->mTransformation *= aiMatrix4x4( 
+				 1,  0,  0,  0, 
+				 0,  0,  1,  0,
+				 0, -1,  0,  0,
+				 0,  0,  0,  1);
+        }
 	// store all meshes
 	StoreSceneMeshes( pScene);
 
diff --git a/code/ColladaLoader.h b/code/ColladaLoader.h
index 850bce780..953bd20b8 100644
--- a/code/ColladaLoader.h
+++ b/code/ColladaLoader.h
@@ -234,6 +234,7 @@ protected:
 	std::vector<aiAnimation*> mAnims;
 
 	bool noSkeletonMesh;
+	bool ignoreUpDirection;
 };
 
 } // end of namespace Assimp
diff --git a/include/assimp/config.h b/include/assimp/config.h
index c1694c94c..8683cc385 100644
--- a/include/assimp/config.h
+++ b/include/assimp/config.h
@@ -841,4 +841,6 @@ enum aiComponent
  */
 #define AI_CONFIG_IMPORT_IFC_CUSTOM_TRIANGULATION "IMPORT_IFC_CUSTOM_TRIANGULATION"
 
-#endif // !! AI_CONFIG_H_INC
\ No newline at end of file
+#define AI_CONFIG_IMPORT_COLLADA_IGNORE_UP_DIRECTION "IMPORT_COLLADA_IGNORE_UP_DIRECTION"
+
+#endif // !! AI_CONFIG_H_INC