assimp/code/ACLoader.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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  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
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* Neither the name of the assimp team, nor the names of its
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  derived from this software without specific prior
  written permission of the assimp team.

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/

/** @file  ACLoader.h
 *  @brief Declaration of the .ac importer class.
 */
#ifndef AI_AC3DLOADER_H_INCLUDED
#define AI_AC3DLOADER_H_INCLUDED

#include <vector>

#include "BaseImporter.h"
#include "../include/assimp/types.h"

struct aiNode;
struct aiMesh;
struct aiMaterial;
struct aiLight;


namespace Assimp    {

// ---------------------------------------------------------------------------
/** AC3D (*.ac) importer class
*/
class AC3DImporter : public BaseImporter
{
public:
    AC3DImporter();
    ~AC3DImporter();



    // Represents an AC3D material
    struct Material
    {
        Material()
            :   rgb     (0.6f,0.6f,0.6f)
            ,   spec    (1.f,1.f,1.f)
            ,   shin    (0.f)
            ,   trans   (0.f)
        {}

        // base color of the material
        aiColor3D rgb;

        // ambient color of the material
        aiColor3D amb;

        // emissive color of the material
        aiColor3D emis;

        // specular color of the material
        aiColor3D spec;

        // shininess exponent
        float shin;

        // transparency. 0 == opaque
        float trans;

        // name of the material. optional.
        std::string name;
    };

    // Represents an AC3D surface
    struct Surface
    {
        Surface()
            :   mat     (0)
            ,   flags   (0)
        {}

        unsigned int mat,flags;

        typedef std::pair<unsigned int, aiVector2D > SurfaceEntry;
        std::vector< SurfaceEntry > entries;
    };

    // Represents an AC3D object
    struct Object
    {
        Object()
            :   type    (World)
            ,   name( "" )
            ,   children()
            ,   texture( "" )
            ,   texRepeat( 1.f, 1.f )
            ,   texOffset( 0.0f, 0.0f )
            ,   rotation()
            ,   translation()
            ,   vertices()
            ,   surfaces()
            ,   numRefs (0)
            ,   subDiv  (0)
        {}

        // Type description
        enum Type
        {
            World = 0x0,
            Poly  = 0x1,
            Group = 0x2,
            Light = 0x4
        } type;

        // name of the object
        std::string name;

        // object children
        std::vector<Object> children;

        // texture to be assigned to all surfaces of the object
        std::string texture;

        // texture repat factors (scaling for all coordinates)
        aiVector2D texRepeat, texOffset;

        // rotation matrix
        aiMatrix3x3 rotation;

        // translation vector
        aiVector3D translation;

        // vertices
        std::vector<aiVector3D> vertices;

        // surfaces
        std::vector<Surface> surfaces;

        // number of indices (= num verts in verbose format)
        unsigned int numRefs;

        // number of subdivisions to be performed on the
        // imported data
        unsigned int subDiv;

        // max angle limit for smoothing
        float crease;
    };


public:

    // -------------------------------------------------------------------
    /** Returns whether the class 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:

    // -------------------------------------------------------------------
    /** Return importer meta information.
     * See #BaseImporter::GetInfo for the details */
    const aiImporterDesc* GetInfo () const;

    // -------------------------------------------------------------------
    /** Imports the given file into the given scene structure.
     * See BaseImporter::InternReadFile() for details*/
    void InternReadFile( const std::string& pFile, aiScene* pScene,
        IOSystem* pIOHandler);

    // -------------------------------------------------------------------
    /** Called prior to ReadFile().
    * The function is a request to the importer to update its configuration
    * basing on the Importer's configuration property list.*/
    void SetupProperties(const Importer* pImp);

private:

    // -------------------------------------------------------------------
    /** Get the next line from the file.
     *  @return false if the end of the file was reached*/
    bool GetNextLine();

    // -------------------------------------------------------------------
    /** Load the object section. This method is called recursively to
     *  load subobjects, the method returns after a 'kids 0' was
     *  encountered.
     *  @objects List of output objects*/
    void LoadObjectSection(std::vector<Object>& objects);

    // -------------------------------------------------------------------
    /** Convert all objects into meshes and nodes.
     *  @param object Current object to work on
     *  @param meshes Pointer to the list of output meshes
     *  @param outMaterials List of output materials
     *  @param materials Material list
     *  @param Scenegraph node for the object */
    aiNode* ConvertObjectSection(Object& object,
        std::vector<aiMesh*>& meshes,
        std::vector<aiMaterial*>& outMaterials,
        const std::vector<Material>& materials,
        aiNode* parent = NULL);

    // -------------------------------------------------------------------
    /** Convert a material
     *  @param object Current object
     *  @param matSrc Source material description
     *  @param matDest Destination material to be filled */
    void ConvertMaterial(const Object& object,
        const Material& matSrc,
        aiMaterial& matDest);

private:


    // points to the next data line
    const char* buffer;

    // Configuration option: if enabled, up to two meshes
    // are generated per material: those faces who have
    // their bf cull flags set are separated.
    bool configSplitBFCull;

    // Configuration switch: subdivision surfaces are only
    // evaluated if the value is true.
    bool configEvalSubdivision;

    // counts how many objects we have in the tree.
    // basing on this information we can find a
    // good estimate how many meshes we'll have in the final scene.
    unsigned int mNumMeshes;

    // current list of light sources
    std::vector<aiLight*>* mLights;

    // name counters
    unsigned int lights, groups, polys, worlds;
};

} // end of namespace Assimp

#endif // AI_AC3DIMPORTER_H_INC