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diff --git a/src/mesh/assimp-master/code/AssetLib/FBX/FBXCommon.h b/src/mesh/assimp-master/code/AssetLib/FBX/FBXCommon.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file FBXCommon.h
+* Some useful constants and enums for dealing with FBX files.
+*/
+#ifndef AI_FBXCOMMON_H_INC
+#define AI_FBXCOMMON_H_INC
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+namespace Assimp {
+namespace FBX {
+
+const std::string NULL_RECORD = { // 25 null bytes in 64-bit and 13 null bytes in 32-bit
+    '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+    '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'
+}; // who knows why, it looks like two integers 32/64 bit (compressed and uncompressed sizes?) + 1 byte (might be compression type?)
+const std::string SEPARATOR = { '\x00', '\x01' }; // for use inside strings
+const std::string MAGIC_NODE_TAG = "_$AssimpFbx$"; // from import
+const int64_t SECOND = 46186158000; // FBX's kTime unit
+
+// rotation order. We'll probably use EulerXYZ for everything
+enum RotOrder {
+    RotOrder_EulerXYZ = 0,
+    RotOrder_EulerXZY,
+    RotOrder_EulerYZX,
+    RotOrder_EulerYXZ,
+    RotOrder_EulerZXY,
+    RotOrder_EulerZYX,
+
+    RotOrder_SphericXYZ,
+
+    RotOrder_MAX // end-of-enum sentinel
+};
+
+// transformation inheritance method. Most of the time RSrs
+enum TransformInheritance {
+    TransformInheritance_RrSs = 0,
+    TransformInheritance_RSrs,
+    TransformInheritance_Rrs,
+
+    TransformInheritance_MAX // end-of-enum sentinel
+};
+
+} // namespace FBX
+} // namespace Assimp
+
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#endif // AI_FBXCOMMON_H_INC