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diff --git a/3rdparty/assimp/code/HalfLifeFileData.h b/3rdparty/assimp/code/HalfLifeFileData.h
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+++ b/3rdparty/assimp/code/HalfLifeFileData.h
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+/*
+Open Asset Import Library (ASSIMP)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2010, ASSIMP Development 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 Development 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 Definition of in-memory structures for the HL2 MDL file format
+//  and for the HalfLife text format (SMD)
+//
+// The specification has been taken from various sources on the internet.
+
+
+#ifndef AI_MDLFILEHELPER2_H_INC
+#define AI_MDLFILEHELPER2_H_INC
+
+#include "./../include/Compiler/pushpack1.h"
+
+#include "MDLFileData.h"
+
+namespace Assimp {
+namespace MDL {
+
+// magic bytes used in Half Life 2 MDL models
+#define AI_MDL_MAGIC_NUMBER_BE_HL2a AI_MAKE_MAGIC("IDST")
+#define AI_MDL_MAGIC_NUMBER_LE_HL2a AI_MAKE_MAGIC("TSDI")
+#define AI_MDL_MAGIC_NUMBER_BE_HL2b AI_MAKE_MAGIC("IDSQ")
+#define AI_MDL_MAGIC_NUMBER_LE_HL2b AI_MAKE_MAGIC("QSDI")
+
+// ---------------------------------------------------------------------------
+/** \struct Header_HL2
+ *  \brief Data structure for the HL2 main header
+ */
+// ---------------------------------------------------------------------------
+struct Header_HL2
+{
+    //! magic number: "IDST"/"IDSQ"
+    char ident[4];
+
+    //! Version number
+    int32_t version;
+
+    //! Original file name in pak ?
+    char  name[64];
+
+    //! Length of file name/length of file?
+    int32_t  length;
+
+    //! For viewer, ignored
+    aiVector3D  eyeposition;
+    aiVector3D  min;
+    aiVector3D  max;
+
+    //! AABB of the model
+    aiVector3D  bbmin;
+    aiVector3D  bbmax;
+
+    // File flags
+    int32_t   flags;
+
+    //! NUmber of bones contained in the file
+    int32_t   numbones;
+    int32_t   boneindex;
+
+    //! Number of bone controllers for bone animation
+    int32_t   numbonecontrollers;
+    int32_t   bonecontrollerindex;
+
+    //! More bounding boxes ...
+    int32_t   numhitboxes;
+    int32_t   hitboxindex;
+
+    //! Animation sequences in the file
+    int32_t   numseq;
+    int32_t   seqindex;
+
+    //! Loaded sequences. Ignored
+    int32_t   numseqgroups;
+    int32_t   seqgroupindex;
+
+    //! Raw texture data
+    int32_t   numtextures;
+    int32_t   textureindex;
+    int32_t   texturedataindex;
+
+    //! Number of skins (=textures?)
+    int32_t   numskinref;
+    int32_t   numskinfamilies;
+    int32_t   skinindex;
+
+    //! Number of parts
+    int32_t   numbodyparts;
+    int32_t   bodypartindex;
+
+    //! attachable points for gameplay and physics
+    int32_t   numattachments;
+    int32_t   attachmentindex;
+
+    //! Table of sound effects associated with the model
+    int32_t   soundtable;
+    int32_t   soundindex;
+    int32_t   soundgroups;
+    int32_t   soundgroupindex;
+
+    //! Number of animation transitions
+    int32_t   numtransitions;
+    int32_t   transitionindex;
+} PACK_STRUCT;
+
+#include "./../include/Compiler/poppack1.h"
+
+}
+} // end namespaces
+
+#endif // ! AI_MDLFILEHELPER2_H_INC