WIP of assimp integration.

Engine/lib/assimp/code/LWSLoader.h

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+/*
+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  LWSLoader.h
+ *  @brief Declaration of the LightWave scene importer class.
+ */
+#ifndef AI_LWSLOADER_H_INCLUDED
+#define AI_LWSLOADER_H_INCLUDED
+
+#include "LWOFileData.h"
+#include <assimp/SceneCombiner.h>
+#include <assimp/BaseImporter.h>
+
+struct aiImporterDesc;
+
+namespace Assimp    {
+    class BatchLoader;
+    class Importer;
+    class IOSystem;
+
+    namespace LWS   {
+
+// ---------------------------------------------------------------------------
+/** Represents an element in a LWS file.
+ *
+ *  This can either be a single data line - <name> <value> or a data
+ *  group - { name <data_line0> ... n }
+ */
+class Element
+{
+public:
+    Element()
+    {}
+
+    // first: name, second: rest
+    std::string tokens[2];
+    std::list<Element> children;
+
+    //! Recursive parsing function
+    void Parse (const char*& buffer);
+};
+
+#define AI_LWS_MASK (0xffffffff >> 4u)
+
+// ---------------------------------------------------------------------------
+/** Represents a LWS scenegraph element
+ */
+struct NodeDesc
+{
+    NodeDesc()
+        :   type()
+        ,   id()
+        ,   number  (0)
+        ,   parent  (0)
+        ,   name    ("")
+        ,   isPivotSet (false)
+        ,   lightColor (1.f,1.f,1.f)
+        ,   lightIntensity (1.f)
+        ,   lightType (0)
+        ,   lightFalloffType (0)
+        ,   lightConeAngle (45.f)
+        ,   lightEdgeAngle()
+        ,   parent_resolved (NULL)
+    {}
+
+    enum {
+
+        OBJECT = 1,
+        LIGHT  = 2,
+        CAMERA = 3,
+        BONE   = 4
+    } type; // type of node
+
+    // if object: path
+    std::string path;
+    unsigned int id;
+
+    // number of object
+    unsigned int number;
+
+    // index of parent index
+    unsigned int parent;
+
+    // lights & cameras & dummies: name
+    const char* name;
+
+    // animation channels
+    std::list< LWO::Envelope > channels;
+
+    // position of pivot point
+    aiVector3D pivotPos;
+    bool isPivotSet;
+
+
+
+    // color of light source
+    aiColor3D lightColor;
+
+    // intensity of light source
+    float lightIntensity;
+
+    // type of light source
+    unsigned int lightType;
+
+    // falloff type of light source
+    unsigned int lightFalloffType;
+
+    // cone angle of (spot) light source
+    float lightConeAngle;
+
+    // soft cone angle of (spot) light source
+    float lightEdgeAngle;
+
+
+
+    // list of resolved children
+    std::list< NodeDesc* > children;
+
+    // resolved parent node
+    NodeDesc* parent_resolved;
+
+
+    // for std::find()
+    bool operator == (unsigned int num)  const {
+        if (!num)
+            return false;
+        unsigned int _type = num >> 28u;
+
+        return _type == static_cast<unsigned int>(type) && (num & AI_LWS_MASK) == number;
+    }
+};
+
+} // end namespace LWS
+
+// ---------------------------------------------------------------------------
+/** LWS (LightWave Scene Format) importer class.
+ *
+ *  This class does heavily depend on the LWO importer class. LWS files
+ *  contain mainly descriptions how LWO objects are composed together
+ *  in a scene.
+*/
+class LWSImporter : public BaseImporter
+{
+public:
+    LWSImporter();
+    ~LWSImporter();
+
+
+public:
+
+    // -------------------------------------------------------------------
+    // Check whether we can read a specific file
+    bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
+        bool checkSig) const;
+
+protected:
+
+    // -------------------------------------------------------------------
+    // Get list of supported extensions
+    const aiImporterDesc* GetInfo () const;
+
+    // -------------------------------------------------------------------
+    // Import file into given scene data structure
+    void InternReadFile( const std::string& pFile, aiScene* pScene,
+        IOSystem* pIOHandler);
+
+    // -------------------------------------------------------------------
+    // Setup import properties
+    void SetupProperties(const Importer* pImp);
+
+private:
+
+
+    // -------------------------------------------------------------------
+    // Read an envelope description
+    void ReadEnvelope(const LWS::Element& dad, LWO::Envelope& out );
+
+    // -------------------------------------------------------------------
+    // Read an envelope description for the older LW file format
+    void ReadEnvelope_Old(std::list< LWS::Element >::const_iterator& it,
+        const std::list< LWS::Element >::const_iterator& end,
+        LWS::NodeDesc& nodes,
+        unsigned int version);
+
+    // -------------------------------------------------------------------
+    // Setup a nice name for a node
+    void SetupNodeName(aiNode* nd, LWS::NodeDesc& src);
+
+    // -------------------------------------------------------------------
+    // Recursively build the scenegraph
+    void BuildGraph(aiNode* nd,
+        LWS::NodeDesc& src,
+        std::vector<AttachmentInfo>& attach,
+        BatchLoader& batch,
+        aiCamera**& camOut,
+        aiLight**& lightOut,
+        std::vector<aiNodeAnim*>& animOut);
+
+    // -------------------------------------------------------------------
+    // Try several dirs until we find the right location of a LWS file.
+    std::string FindLWOFile(const std::string& in);
+
+private:
+
+    bool configSpeedFlag;
+    IOSystem* io;
+
+    double first,last,fps;
+
+    bool noSkeletonMesh;
+};
+
+} // end of namespace Assimp
+
+#endif // AI_LWSIMPORTER_H_INC