assimp/code/LWSLoader.h

/*
Open Asset Import Library (assimp)
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All rights reserved.

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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*/

/** @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 "SceneCombiner.h"
#include "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