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diff --git a/libs/assimp/code/AssetLib/LWO/LWOFileData.h b/libs/assimp/code/AssetLib/LWO/LWOFileData.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 LWOFileData.h
+ *  @brief Defines chunk constants used by the LWO file format
+
+The chunks are taken from the official LightWave SDK headers.
+
+*/
+#ifndef AI_LWO_FILEDATA_INCLUDED
+#define AI_LWO_FILEDATA_INCLUDED
+
+// STL headers
+#include <list>
+#include <vector>
+
+// public ASSIMP headers
+#include <assimp/mesh.h>
+
+// internal headers
+#include "AssetLib/LWO/LWOAnimation.h"
+#include "Common/IFF.h"
+
+namespace Assimp {
+namespace LWO {
+
+#define AI_LWO_FOURCC_LWOB AI_IFF_FOURCC('L', 'W', 'O', 'B')
+#define AI_LWO_FOURCC_LWO2 AI_IFF_FOURCC('L', 'W', 'O', '2')
+#define AI_LWO_FOURCC_LXOB AI_IFF_FOURCC('L', 'X', 'O', 'B')
+
+// chunks specific to the LWOB format
+#define AI_LWO_SRFS AI_IFF_FOURCC('S', 'R', 'F', 'S')
+#define AI_LWO_FLAG AI_IFF_FOURCC('F', 'L', 'A', 'G')
+#define AI_LWO_VLUM AI_IFF_FOURCC('V', 'L', 'U', 'M')
+#define AI_LWO_VDIF AI_IFF_FOURCC('V', 'D', 'I', 'F')
+#define AI_LWO_VSPC AI_IFF_FOURCC('V', 'S', 'P', 'C')
+#define AI_LWO_RFLT AI_IFF_FOURCC('R', 'F', 'L', 'T')
+#define AI_LWO_BTEX AI_IFF_FOURCC('B', 'T', 'E', 'X')
+#define AI_LWO_CTEX AI_IFF_FOURCC('C', 'T', 'E', 'X')
+#define AI_LWO_DTEX AI_IFF_FOURCC('D', 'T', 'E', 'X')
+#define AI_LWO_LTEX AI_IFF_FOURCC('L', 'T', 'E', 'X')
+#define AI_LWO_RTEX AI_IFF_FOURCC('R', 'T', 'E', 'X')
+#define AI_LWO_STEX AI_IFF_FOURCC('S', 'T', 'E', 'X')
+#define AI_LWO_TTEX AI_IFF_FOURCC('T', 'T', 'E', 'X')
+#define AI_LWO_TFLG AI_IFF_FOURCC('T', 'F', 'L', 'G')
+#define AI_LWO_TSIZ AI_IFF_FOURCC('T', 'S', 'I', 'Z')
+#define AI_LWO_TCTR AI_IFF_FOURCC('T', 'C', 'T', 'R')
+#define AI_LWO_TFAL AI_IFF_FOURCC('T', 'F', 'A', 'L')
+#define AI_LWO_TVEL AI_IFF_FOURCC('T', 'V', 'E', 'L')
+#define AI_LWO_TCLR AI_IFF_FOURCC('T', 'C', 'L', 'R')
+#define AI_LWO_TVAL AI_IFF_FOURCC('T', 'V', 'A', 'L')
+#define AI_LWO_TAMP AI_IFF_FOURCC('T', 'A', 'M', 'P')
+#define AI_LWO_TIMG AI_IFF_FOURCC('T', 'I', 'M', 'G')
+#define AI_LWO_TAAS AI_IFF_FOURCC('T', 'A', 'A', 'S')
+#define AI_LWO_TREF AI_IFF_FOURCC('T', 'R', 'E', 'F')
+#define AI_LWO_TOPC AI_IFF_FOURCC('T', 'O', 'P', 'C')
+#define AI_LWO_SDAT AI_IFF_FOURCC('S', 'D', 'A', 'T')
+#define AI_LWO_TFP0 AI_IFF_FOURCC('T', 'F', 'P', '0')
+#define AI_LWO_TFP1 AI_IFF_FOURCC('T', 'F', 'P', '1')
+
+/* top-level chunks */
+#define AI_LWO_LAYR AI_IFF_FOURCC('L', 'A', 'Y', 'R')
+#define AI_LWO_TAGS AI_IFF_FOURCC('T', 'A', 'G', 'S')
+#define AI_LWO_PNTS AI_IFF_FOURCC('P', 'N', 'T', 'S')
+#define AI_LWO_BBOX AI_IFF_FOURCC('B', 'B', 'O', 'X')
+#define AI_LWO_VMAP AI_IFF_FOURCC('V', 'M', 'A', 'P')
+#define AI_LWO_VMAD AI_IFF_FOURCC('V', 'M', 'A', 'D')
+#define AI_LWO_POLS AI_IFF_FOURCC('P', 'O', 'L', 'S')
+#define AI_LWO_PTAG AI_IFF_FOURCC('P', 'T', 'A', 'G')
+#define AI_LWO_ENVL AI_IFF_FOURCC('E', 'N', 'V', 'L')
+#define AI_LWO_CLIP AI_IFF_FOURCC('C', 'L', 'I', 'P')
+#define AI_LWO_SURF AI_IFF_FOURCC('S', 'U', 'R', 'F')
+#define AI_LWO_DESC AI_IFF_FOURCC('D', 'E', 'S', 'C')
+#define AI_LWO_TEXT AI_IFF_FOURCC('T', 'E', 'X', 'T')
+#define AI_LWO_ICON AI_IFF_FOURCC('I', 'C', 'O', 'N')
+
+/* polygon types */
+#define AI_LWO_FACE AI_IFF_FOURCC('F', 'A', 'C', 'E')
+#define AI_LWO_CURV AI_IFF_FOURCC('C', 'U', 'R', 'V')
+#define AI_LWO_PTCH AI_IFF_FOURCC('P', 'T', 'C', 'H')
+#define AI_LWO_MBAL AI_IFF_FOURCC('M', 'B', 'A', 'L')
+#define AI_LWO_BONE AI_IFF_FOURCC('B', 'O', 'N', 'E')
+#define AI_LWO_SUBD AI_IFF_FOURCC('S', 'U', 'B', 'D')
+
+/* polygon tags */
+#define AI_LWO_SURF AI_IFF_FOURCC('S', 'U', 'R', 'F')
+#define AI_LWO_PART AI_IFF_FOURCC('P', 'A', 'R', 'T')
+#define AI_LWO_SMGP AI_IFF_FOURCC('S', 'M', 'G', 'P')
+
+/* envelopes */
+#define AI_LWO_PRE AI_IFF_FOURCC('P', 'R', 'E', ' ')
+#define AI_LWO_POST AI_IFF_FOURCC('P', 'O', 'S', 'T')
+#define AI_LWO_KEY AI_IFF_FOURCC('K', 'E', 'Y', ' ')
+#define AI_LWO_SPAN AI_IFF_FOURCC('S', 'P', 'A', 'N')
+#define AI_LWO_TCB AI_IFF_FOURCC('T', 'C', 'B', ' ')
+#define AI_LWO_HERM AI_IFF_FOURCC('H', 'E', 'R', 'M')
+#define AI_LWO_BEZI AI_IFF_FOURCC('B', 'E', 'Z', 'I')
+#define AI_LWO_BEZ2 AI_IFF_FOURCC('B', 'E', 'Z', '2')
+#define AI_LWO_LINE AI_IFF_FOURCC('L', 'I', 'N', 'E')
+#define AI_LWO_STEP AI_IFF_FOURCC('S', 'T', 'E', 'P')
+
+/* clips */
+#define AI_LWO_STIL AI_IFF_FOURCC('S', 'T', 'I', 'L')
+#define AI_LWO_ISEQ AI_IFF_FOURCC('I', 'S', 'E', 'Q')
+#define AI_LWO_ANIM AI_IFF_FOURCC('A', 'N', 'I', 'M')
+#define AI_LWO_XREF AI_IFF_FOURCC('X', 'R', 'E', 'F')
+#define AI_LWO_STCC AI_IFF_FOURCC('S', 'T', 'C', 'C')
+#define AI_LWO_TIME AI_IFF_FOURCC('T', 'I', 'M', 'E')
+#define AI_LWO_CONT AI_IFF_FOURCC('C', 'O', 'N', 'T')
+#define AI_LWO_BRIT AI_IFF_FOURCC('B', 'R', 'I', 'T')
+#define AI_LWO_SATR AI_IFF_FOURCC('S', 'A', 'T', 'R')
+#define AI_LWO_HUE AI_IFF_FOURCC('H', 'U', 'E', ' ')
+#define AI_LWO_GAMM AI_IFF_FOURCC('G', 'A', 'M', 'M')
+#define AI_LWO_NEGA AI_IFF_FOURCC('N', 'E', 'G', 'A')
+#define AI_LWO_IFLT AI_IFF_FOURCC('I', 'F', 'L', 'T')
+#define AI_LWO_PFLT AI_IFF_FOURCC('P', 'F', 'L', 'T')
+
+/* surfaces */
+#define AI_LWO_COLR AI_IFF_FOURCC('C', 'O', 'L', 'R')
+#define AI_LWO_LUMI AI_IFF_FOURCC('L', 'U', 'M', 'I')
+#define AI_LWO_DIFF AI_IFF_FOURCC('D', 'I', 'F', 'F')
+#define AI_LWO_SPEC AI_IFF_FOURCC('S', 'P', 'E', 'C')
+#define AI_LWO_GLOS AI_IFF_FOURCC('G', 'L', 'O', 'S')
+#define AI_LWO_REFL AI_IFF_FOURCC('R', 'E', 'F', 'L')
+#define AI_LWO_RFOP AI_IFF_FOURCC('R', 'F', 'O', 'P')
+#define AI_LWO_RIMG AI_IFF_FOURCC('R', 'I', 'M', 'G')
+#define AI_LWO_RSAN AI_IFF_FOURCC('R', 'S', 'A', 'N')
+#define AI_LWO_TRAN AI_IFF_FOURCC('T', 'R', 'A', 'N')
+#define AI_LWO_TROP AI_IFF_FOURCC('T', 'R', 'O', 'P')
+#define AI_LWO_TIMG AI_IFF_FOURCC('T', 'I', 'M', 'G')
+#define AI_LWO_RIND AI_IFF_FOURCC('R', 'I', 'N', 'D')
+#define AI_LWO_TRNL AI_IFF_FOURCC('T', 'R', 'N', 'L')
+#define AI_LWO_BUMP AI_IFF_FOURCC('B', 'U', 'M', 'P')
+#define AI_LWO_SMAN AI_IFF_FOURCC('S', 'M', 'A', 'N')
+#define AI_LWO_SIDE AI_IFF_FOURCC('S', 'I', 'D', 'E')
+#define AI_LWO_CLRH AI_IFF_FOURCC('C', 'L', 'R', 'H')
+#define AI_LWO_CLRF AI_IFF_FOURCC('C', 'L', 'R', 'F')
+#define AI_LWO_ADTR AI_IFF_FOURCC('A', 'D', 'T', 'R')
+#define AI_LWO_SHRP AI_IFF_FOURCC('S', 'H', 'R', 'P')
+#define AI_LWO_LINE AI_IFF_FOURCC('L', 'I', 'N', 'E')
+#define AI_LWO_LSIZ AI_IFF_FOURCC('L', 'S', 'I', 'Z')
+#define AI_LWO_ALPH AI_IFF_FOURCC('A', 'L', 'P', 'H')
+#define AI_LWO_AVAL AI_IFF_FOURCC('A', 'V', 'A', 'L')
+#define AI_LWO_GVAL AI_IFF_FOURCC('G', 'V', 'A', 'L')
+#define AI_LWO_BLOK AI_IFF_FOURCC('B', 'L', 'O', 'K')
+#define AI_LWO_VCOL AI_IFF_FOURCC('V', 'C', 'O', 'L')
+
+/* texture layer */
+#define AI_LWO_TYPE AI_IFF_FOURCC('T', 'Y', 'P', 'E')
+#define AI_LWO_CHAN AI_IFF_FOURCC('C', 'H', 'A', 'N')
+#define AI_LWO_NAME AI_IFF_FOURCC('N', 'A', 'M', 'E')
+#define AI_LWO_ENAB AI_IFF_FOURCC('E', 'N', 'A', 'B')
+#define AI_LWO_OPAC AI_IFF_FOURCC('O', 'P', 'A', 'C')
+#define AI_LWO_FLAG AI_IFF_FOURCC('F', 'L', 'A', 'G')
+#define AI_LWO_PROJ AI_IFF_FOURCC('P', 'R', 'O', 'J')
+#define AI_LWO_STCK AI_IFF_FOURCC('S', 'T', 'C', 'K')
+#define AI_LWO_TAMP AI_IFF_FOURCC('T', 'A', 'M', 'P')
+
+/* texture coordinates */
+#define AI_LWO_TMAP AI_IFF_FOURCC('T', 'M', 'A', 'P')
+#define AI_LWO_AXIS AI_IFF_FOURCC('A', 'X', 'I', 'S')
+#define AI_LWO_CNTR AI_IFF_FOURCC('C', 'N', 'T', 'R')
+#define AI_LWO_SIZE AI_IFF_FOURCC('S', 'I', 'Z', 'E')
+#define AI_LWO_ROTA AI_IFF_FOURCC('R', 'O', 'T', 'A')
+#define AI_LWO_OREF AI_IFF_FOURCC('O', 'R', 'E', 'F')
+#define AI_LWO_FALL AI_IFF_FOURCC('F', 'A', 'L', 'L')
+#define AI_LWO_CSYS AI_IFF_FOURCC('C', 'S', 'Y', 'S')
+
+/* image map */
+#define AI_LWO_IMAP AI_IFF_FOURCC('I', 'M', 'A', 'P')
+#define AI_LWO_IMAG AI_IFF_FOURCC('I', 'M', 'A', 'G')
+#define AI_LWO_WRAP AI_IFF_FOURCC('W', 'R', 'A', 'P')
+#define AI_LWO_WRPW AI_IFF_FOURCC('W', 'R', 'P', 'W')
+#define AI_LWO_WRPH AI_IFF_FOURCC('W', 'R', 'P', 'H')
+#define AI_LWO_VMAP AI_IFF_FOURCC('V', 'M', 'A', 'P')
+#define AI_LWO_AAST AI_IFF_FOURCC('A', 'A', 'S', 'T')
+#define AI_LWO_PIXB AI_IFF_FOURCC('P', 'I', 'X', 'B')
+
+/* procedural */
+#define AI_LWO_PROC AI_IFF_FOURCC('P', 'R', 'O', 'C')
+#define AI_LWO_COLR AI_IFF_FOURCC('C', 'O', 'L', 'R')
+#define AI_LWO_VALU AI_IFF_FOURCC('V', 'A', 'L', 'U')
+#define AI_LWO_FUNC AI_IFF_FOURCC('F', 'U', 'N', 'C')
+#define AI_LWO_FTPS AI_IFF_FOURCC('F', 'T', 'P', 'S')
+#define AI_LWO_ITPS AI_IFF_FOURCC('I', 'T', 'P', 'S')
+#define AI_LWO_ETPS AI_IFF_FOURCC('E', 'T', 'P', 'S')
+
+/* gradient */
+#define AI_LWO_GRAD AI_IFF_FOURCC('G', 'R', 'A', 'D')
+#define AI_LWO_GRST AI_IFF_FOURCC('G', 'R', 'S', 'T')
+#define AI_LWO_GREN AI_IFF_FOURCC('G', 'R', 'E', 'N')
+#define AI_LWO_PNAM AI_IFF_FOURCC('P', 'N', 'A', 'M')
+#define AI_LWO_INAM AI_IFF_FOURCC('I', 'N', 'A', 'M')
+#define AI_LWO_GRPT AI_IFF_FOURCC('G', 'R', 'P', 'T')
+#define AI_LWO_FKEY AI_IFF_FOURCC('F', 'K', 'E', 'Y')
+#define AI_LWO_IKEY AI_IFF_FOURCC('I', 'K', 'E', 'Y')
+
+/* shader */
+#define AI_LWO_SHDR AI_IFF_FOURCC('S', 'H', 'D', 'R')
+#define AI_LWO_DATA AI_IFF_FOURCC('D', 'A', 'T', 'A')
+
+/* VMAP types */
+#define AI_LWO_TXUV AI_IFF_FOURCC('T', 'X', 'U', 'V')
+#define AI_LWO_RGB AI_IFF_FOURCC('R', 'G', 'B', ' ')
+#define AI_LWO_RGBA AI_IFF_FOURCC('R', 'G', 'B', 'A')
+#define AI_LWO_WGHT AI_IFF_FOURCC('W', 'G', 'H', 'T')
+
+#define AI_LWO_MNVW AI_IFF_FOURCC('M', 'N', 'V', 'W')
+#define AI_LWO_MORF AI_IFF_FOURCC('M', 'O', 'R', 'F')
+#define AI_LWO_SPOT AI_IFF_FOURCC('S', 'P', 'O', 'T')
+#define AI_LWO_PICK AI_IFF_FOURCC('P', 'I', 'C', 'K')
+
+// MODO extension - per-vertex normal vectors
+#define AI_LWO_MODO_NORM AI_IFF_FOURCC('N', 'O', 'R', 'M')
+
+// ---------------------------------------------------------------------------
+/** \brief Data structure for a face in a LWO file
+ *
+ * \note We can't use the code in SmoothingGroups.inl here - the mesh
+ *   structures of 3DS/ASE and LWO are too different.
+ */
+struct Face : public aiFace {
+    //! Default construction
+    Face() AI_NO_EXCEPT
+            : surfaceIndex(0),
+              smoothGroup(0),
+              type(AI_LWO_FACE) {
+        // empty
+    }
+
+    //! Construction from given type
+    explicit Face(uint32_t _type) :
+            surfaceIndex(0), smoothGroup(0), type(_type) {}
+
+    //! Copy construction
+    Face(const Face &f) :
+            aiFace() {
+        *this = f;
+    }
+
+    //! Zero-based index into tags chunk
+    unsigned int surfaceIndex;
+
+    //! Smooth group this face is assigned to
+    unsigned int smoothGroup;
+
+    //! Type of face
+    uint32_t type;
+
+    //! Assignment operator
+    Face &operator=(const LWO::Face &f) {
+        aiFace::operator=(f);
+        surfaceIndex = f.surfaceIndex;
+        smoothGroup = f.smoothGroup;
+        type = f.type;
+        return *this;
+    }
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Base structure for all vertex map representations
+ */
+struct VMapEntry {
+    explicit VMapEntry(unsigned int _dims) :
+            dims(_dims) {}
+
+    virtual ~VMapEntry() {}
+
+    //! allocates memory for the vertex map
+    virtual void Allocate(unsigned int num) {
+        if (!rawData.empty())
+            return; // return if already allocated
+
+        const unsigned int m = num * dims;
+        rawData.reserve(m + (m >> 2u)); // 25% as  extra storage for VMADs
+        rawData.resize(m, 0.f);
+        abAssigned.resize(num, false);
+    }
+
+    std::string name;
+    unsigned int dims;
+
+    std::vector<float> rawData;
+    std::vector<bool> abAssigned;
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Represents an extra vertex color channel
+ */
+struct VColorChannel : public VMapEntry {
+    VColorChannel() :
+            VMapEntry(4) {}
+
+    //! need to overwrite this function - the alpha channel must
+    //! be initialized to 1.0 by default
+    virtual void Allocate(unsigned int num) {
+        if (!rawData.empty())
+            return; // return if already allocated
+
+        unsigned int m = num * dims;
+        rawData.reserve(m + (m >> 2u)); // 25% as  extra storage for VMADs
+        rawData.resize(m);
+
+        for (aiColor4D *p = (aiColor4D *)&rawData[0]; p < (aiColor4D *)&rawData[m - 1]; ++p)
+            p->a = 1.f;
+
+        abAssigned.resize(num, false);
+    }
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Represents an extra vertex UV channel
+ */
+struct UVChannel : public VMapEntry {
+    UVChannel() :
+            VMapEntry(2) {}
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Represents a weight map
+ */
+struct WeightChannel : public VMapEntry {
+    WeightChannel() :
+            VMapEntry(1) {}
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Represents a vertex-normals channel (MODO extension)
+ */
+struct NormalChannel : public VMapEntry {
+    NormalChannel() :
+            VMapEntry(3) {}
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Data structure for a LWO file texture
+ */
+struct Texture {
+    // we write the enum values out here to make debugging easier ...
+    enum BlendType {
+        Normal = 0,
+        Subtractive = 1,
+        Difference = 2,
+        Multiply = 3,
+        Divide = 4,
+        Alpha = 5,
+        TextureDispl = 6,
+        Additive = 7
+    };
+
+    enum MappingMode {
+        Planar = 0,
+        Cylindrical = 1,
+        Spherical = 2,
+        Cubic = 3,
+        FrontProjection = 4,
+        UV = 5
+    };
+
+    enum Axes {
+        AXIS_X = 0,
+        AXIS_Y = 1,
+        AXIS_Z = 2
+    };
+
+    enum Wrap {
+        RESET = 0,
+        REPEAT = 1,
+        MIRROR = 2,
+        EDGE = 3
+    };
+
+    Texture() :
+            mClipIdx(UINT_MAX), mStrength(1.0f), type(), mUVChannelIndex("unknown"), mRealUVIndex(UINT_MAX), enabled(true), blendType(Additive), bCanUse(true), mapMode(UV), majorAxis(AXIS_X), wrapAmountH(1.0f), wrapAmountW(1.0f), wrapModeWidth(REPEAT), wrapModeHeight(REPEAT), ordinal("\x00") {}
+
+    //! File name of the texture
+    std::string mFileName;
+
+    //! Clip index
+    unsigned int mClipIdx;
+
+    //! Strength of the texture - blend factor
+    float mStrength;
+
+    uint32_t type; // type of the texture
+
+    //! Name of the corresponding UV channel
+    std::string mUVChannelIndex;
+    unsigned int mRealUVIndex;
+
+    //! is the texture enabled?
+    bool enabled;
+
+    //! blend type
+    BlendType blendType;
+
+    //! are we able to use the texture?
+    bool bCanUse;
+
+    //! mapping mode
+    MappingMode mapMode;
+
+    //! major axis for planar, cylindrical, spherical projections
+    Axes majorAxis;
+
+    //! wrap amount for cylindrical and spherical projections
+    float wrapAmountH, wrapAmountW;
+
+    //! wrapping mode for the texture
+    Wrap wrapModeWidth, wrapModeHeight;
+
+    //! ordinal string of the texture
+    std::string ordinal;
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Data structure for a LWO file clip
+ */
+struct Clip {
+    enum Type {
+        STILL,
+        SEQ,
+        REF,
+        UNSUPPORTED
+    } type;
+
+    Clip() :
+            type(UNSUPPORTED), clipRef(), idx(0), negate(false) {}
+
+    //! path to the base texture -
+    std::string path;
+
+    //! reference to another CLIP
+    unsigned int clipRef;
+
+    //! index of the clip
+    unsigned int idx;
+
+    //! Negate the clip?
+    bool negate;
+};
+
+// ---------------------------------------------------------------------------
+/** \brief Data structure for a LWO file shader
+ *
+ *  Later
+ */
+struct Shader {
+    Shader() :
+            ordinal("\x00"), functionName("unknown"), enabled(true) {}
+
+    std::string ordinal;
+    std::string functionName;
+    bool enabled;
+};
+
+typedef std::list<Texture> TextureList;
+typedef std::list<Shader> ShaderList;
+
+// ---------------------------------------------------------------------------
+/** \brief Data structure for a LWO file surface (= material)
+ */
+struct Surface {
+    Surface() :
+            mColor(0.78431f, 0.78431f, 0.78431f), bDoubleSided(false), mDiffuseValue(1.f), mSpecularValue(0.f), mTransparency(0.f), mGlossiness(0.4f), mLuminosity(0.f), mColorHighlights(0.f), mMaximumSmoothAngle(0.f) // 0 == not specified, no smoothing
+            ,
+            mVCMap(),
+            mVCMapType(AI_LWO_RGBA),
+            mIOR(1.f) // vakuum
+            ,
+            mBumpIntensity(1.f),
+            mWireframe(false),
+            mAdditiveTransparency(0.f) {}
+
+    //! Name of the surface
+    std::string mName;
+
+    //! Color of the surface
+    aiColor3D mColor;
+
+    //! true for two-sided materials
+    bool bDoubleSided;
+
+    //! Various material parameters
+    float mDiffuseValue, mSpecularValue, mTransparency, mGlossiness, mLuminosity, mColorHighlights;
+
+    //! Maximum angle between two adjacent triangles
+    //! that they can be smoothed - in degrees
+    float mMaximumSmoothAngle;
+
+    //! Vertex color map to be used to color the surface
+    std::string mVCMap;
+    uint32_t mVCMapType;
+
+    //! Names of the special shaders to be applied to the surface
+    ShaderList mShaders;
+
+    //! Textures - the first entry in the list is evaluated first
+    TextureList mColorTextures, // color textures are added to both diffuse and specular texture stacks
+            mDiffuseTextures,
+            mSpecularTextures,
+            mOpacityTextures,
+            mBumpTextures,
+            mGlossinessTextures,
+            mReflectionTextures;
+
+    //! Index of refraction
+    float mIOR;
+
+    //! Bump intensity scaling
+    float mBumpIntensity;
+
+    //! Wireframe flag
+    bool mWireframe;
+
+    //! Intensity of additive blending
+    float mAdditiveTransparency;
+};
+
+// ---------------------------------------------------------------------------
+#define AI_LWO_VALIDATE_CHUNK_LENGTH(length, name, size)              \
+    if (length < size) {                                              \
+        throw DeadlyImportError("LWO: " #name " chunk is too small"); \
+    }
+
+// some typedefs ... to make life with loader monsters like this easier
+typedef std::vector<aiVector3D> PointList;
+typedef std::vector<LWO::Face> FaceList;
+typedef std::vector<LWO::Surface> SurfaceList;
+typedef std::vector<std::string> TagList;
+typedef std::vector<unsigned int> TagMappingTable;
+typedef std::vector<unsigned int> ReferrerList;
+typedef std::vector<WeightChannel> WeightChannelList;
+typedef std::vector<VColorChannel> VColorChannelList;
+typedef std::vector<UVChannel> UVChannelList;
+typedef std::vector<Clip> ClipList;
+typedef std::vector<Envelope> EnvelopeList;
+typedef std::vector<unsigned int> SortedRep;
+
+// ---------------------------------------------------------------------------
+/** \brief Represents a layer in the file
+ */
+struct Layer {
+    Layer() :
+            mFaceIDXOfs(0), mPointIDXOfs(0), mParent(0x0), mIndex(0xffff), skip(false) {}
+
+    /** Temporary point list from the file */
+    PointList mTempPoints;
+
+    /** Lists for every point the index of another point
+        that has been copied from *this* point or UINT_MAX if
+        no copy of the point has been made */
+    ReferrerList mPointReferrers;
+
+    /** Weight channel list from the file */
+    WeightChannelList mWeightChannels;
+
+    /** Subdivision weight channel list from the file */
+    WeightChannelList mSWeightChannels;
+
+    /** Vertex color list from the file */
+    VColorChannelList mVColorChannels;
+
+    /** UV channel list from the file */
+    UVChannelList mUVChannels;
+
+    /** Normal vector channel from the file */
+    NormalChannel mNormals;
+
+    /** Temporary face list from the file*/
+    FaceList mFaces;
+
+    /** Current face indexing offset from the beginning of the buffers*/
+    unsigned int mFaceIDXOfs;
+
+    /** Current point indexing offset from the beginning of the buffers*/
+    unsigned int mPointIDXOfs;
+
+    /** Parent index */
+    uint16_t mParent;
+
+    /** Index of the layer */
+    uint16_t mIndex;
+
+    /** Name of the layer */
+    std::string mName;
+
+    /** Pivot point of the layer */
+    aiVector3D mPivot;
+
+    /** Skip this layer? */
+    bool skip;
+};
+
+typedef std::list<LWO::Layer> LayerList;
+
+} // namespace LWO
+} // namespace Assimp
+
+#endif // !! AI_LWO_FILEDATA_INCLUDED