WIP of assimp integration.

Engine/lib/assimp/code/UnrealLoader.h

@@ -0,0 +1,206 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2018, 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  UnrealLoader.h
+ *  @brief Declaration of the .3d (UNREAL) importer class.
+ */
+#ifndef INCLUDED_AI_3D_LOADER_H
+#define INCLUDED_AI_3D_LOADER_H
+
+#include <assimp/BaseImporter.h>
+#include <stdint.h>
+
+namespace Assimp    {
+namespace Unreal {
+
+    /*
+    0 = Normal one-sided
+    1 = Normal two-sided
+    2 = Translucent two-sided
+    3 = Masked two-sided
+    4 = Modulation blended two-sided
+    8 = Placeholder triangle for weapon positioning (invisible)
+    */
+enum MeshFlags {
+    MF_NORMAL_OS            = 0,
+    MF_NORMAL_TS            = 1,
+    MF_NORMAL_TRANS_TS      = 2,
+    MF_NORMAL_MASKED_TS     = 3,
+    MF_NORMAL_MOD_TS        = 4,
+    MF_WEAPON_PLACEHOLDER   = 8
+};
+
+    // a single triangle
+struct Triangle {
+   uint16_t mVertex[3];       // Vertex indices
+   char mType;                // James' Mesh Type
+   char mColor;               // Color for flat and Gourand Shaded
+   unsigned char mTex[3][2];  // Texture UV coordinates
+   unsigned char mTextureNum; // Source texture offset
+   char mFlags;               // Unreal Mesh Flags (unused)
+
+   unsigned int matIndex;
+};
+
+// temporary representation for a material
+struct TempMat  {
+    TempMat()
+        :   type()
+        ,   tex()
+        ,   numFaces    (0)
+    {}
+
+    explicit TempMat(const Triangle& in)
+        :   type        ((Unreal::MeshFlags)in.mType)
+        ,   tex         (in.mTextureNum)
+        ,   numFaces    (0)
+    {}
+
+    // type of mesh
+    Unreal::MeshFlags type;
+
+    // index of texture
+    unsigned int tex;
+
+    // number of faces using us
+    unsigned int numFaces;
+
+    // for std::find
+    bool operator == (const TempMat& o )    {
+        return (tex == o.tex && type == o.type);
+    }
+};
+
+struct Vertex
+{
+    int32_t X : 11;
+    int32_t Y : 11;
+    int32_t Z : 10;
+};
+
+    // UNREAL vertex compression
+inline void CompressVertex(const aiVector3D& v, uint32_t& out)
+{
+    union {
+        Vertex n;
+        int32_t t;
+    };
+    n.X = (int32_t)v.x;
+    n.Y = (int32_t)v.y;
+    n.Z = (int32_t)v.z;
+    out = t;
+}
+
+    // UNREAL vertex decompression
+inline void DecompressVertex(aiVector3D& v, int32_t in)
+{
+    union {
+        Vertex n;
+        int32_t i;
+    };
+    i = in;
+
+    v.x = (float)n.X;
+    v.y = (float)n.Y;
+    v.z = (float)n.Z;
+}
+
+} // end namespace Unreal
+
+// ---------------------------------------------------------------------------
+/** @brief Importer class to load UNREAL files (*.3d)
+*/
+class UnrealImporter : public BaseImporter
+{
+public:
+    UnrealImporter();
+    ~UnrealImporter();
+
+
+public:
+
+    // -------------------------------------------------------------------
+    /** @brief Returns whether we can handle the format of the given file
+     *
+     *  See BaseImporter::CanRead() for details.
+     **/
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
+        bool checkSig) const;
+
+protected:
+
+    // -------------------------------------------------------------------
+    /** @brief Called by Importer::GetExtensionList()
+     *
+     * See #BaseImporter::GetInfo for the details
+     */
+    const aiImporterDesc* GetInfo () const;
+
+
+    // -------------------------------------------------------------------
+    /** @brief Setup properties for the importer
+     *
+     * See BaseImporter::SetupProperties() for details
+     */
+    void SetupProperties(const Importer* pImp);
+
+
+    // -------------------------------------------------------------------
+    /** @brief Imports the given file into the given scene structure.
+     *
+     * See BaseImporter::InternReadFile() for details
+     */
+    void InternReadFile( const std::string& pFile, aiScene* pScene,
+        IOSystem* pIOHandler);
+
+private:
+
+    //! frame to be loaded
+    uint32_t configFrameID;
+
+    //! process surface flags
+    bool configHandleFlags;
+
+}; // !class UnrealImporter
+
+} // end of namespace Assimp
+#endif // AI_UNREALIMPORTER_H_INC