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*/

/** @file NFFLoader.h

 *  @brief Declaration of the NFF importer class.

 */

#pragma once

#ifndef AI_NFFLOADER_H_INCLUDED

#define AI_NFFLOADER_H_INCLUDED

#include <assimp/BaseImporter.h>

#include <assimp/material.h>

#include <assimp/types.h>

#include <vector>

namespace Assimp {

// ----------------------------------------------------------------------------------

/** NFF (Neutral File Format) Importer class.

 *

 * The class implements both Eric Haynes NFF format and Sense8's NFF (NFF2) format.

 * Both are quite different and the loading code is somewhat dirty at

 * the moment. Sense8 should be moved to a separate loader.

*/

class NFFImporter : public BaseImporter {

public:

    NFFImporter() = default;

    ~NFFImporter() override = default;

    // -------------------------------------------------------------------

    /** 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 override;

protected:

    // -------------------------------------------------------------------

    /** Return importer meta information.

     * See #BaseImporter::GetInfo for the details

     */

    const aiImporterDesc *GetInfo() const override;

    // -------------------------------------------------------------------

    /** Imports the given file into the given scene structure.

    * See BaseImporter::InternReadFile() for details

    */

    void InternReadFile(const std::string &pFile, aiScene *pScene,

            IOSystem *pIOHandler) override;

private:

    // describes face material properties

    struct ShadingInfo {

        ShadingInfo() :

                color(0.6f, 0.6f, 0.6f),

                diffuse(1.f, 1.f, 1.f),

                specular(1.f, 1.f, 1.f),

                ambient(0.f, 0.f, 0.f),

                emissive(0.f, 0.f, 0.f),

                refracti(1.f),

                twoSided(false), // for NFF2

                shaded(true), // for NFF2

                opacity(1.f),

                shininess(0.f),

                mapping(aiTextureMapping_UV) {

            // empty

        }

        aiColor3D color, diffuse, specular, ambient, emissive;

        ai_real refracti;

        std::string texFile;

        bool twoSided; // For NFF2

        bool shaded;

        ai_real opacity, shininess;

        std::string name;

        // texture mapping to be generated for the mesh - uv is the default

        // it means: use UV if there, nothing otherwise. This property is

        // used for locked meshes.

        aiTextureMapping mapping;

        // shininess is ignored for the moment

        bool operator == (const ShadingInfo &other) const {

            return color == other.color &&

                   diffuse == other.diffuse &&

                   specular == other.specular &&

                   ambient == other.ambient &&

                   refracti == other.refracti &&

                   texFile == other.texFile &&

                   twoSided == other.twoSided &&

                   shaded == other.shaded;

            // Some properties from NFF2 aren't compared by this operator.

            // Comparing MeshInfo::matIndex should do that.

        }

    };

    // describes a NFF light source

    struct Light {

        Light() :

                intensity(1.f), color(1.f, 1.f, 1.f) {}

        aiVector3D position;

        ai_real intensity;

        aiColor3D color;

    };

    enum PatchType {

        PatchType_Simple = 0x0,

        PatchType_Normals = 0x1,

        PatchType_UVAndNormals = 0x2

    };

    // describes a NFF mesh

    struct MeshInfo {

        MeshInfo(PatchType _pType, bool bL = false) :

                pType(_pType), bLocked(bL), radius(1.f, 1.f, 1.f), dir(0.f, 1.f, 0.f), matIndex(0) {

            name[0] = '\0'; // by default meshes are unnamed

        }

        ShadingInfo shader;

        PatchType pType;

        bool bLocked;

        // for spheres, cones and cylinders: center point of the object

        aiVector3D center, radius, dir;

        static const size_t MaxNameLen = 128;

        char name[MaxNameLen];

        std::vector<aiVector3D> vertices, normals, uvs;

        std::vector<unsigned int> faces;

        // for NFF2

        std::vector<aiColor4D> colors;

        unsigned int matIndex;

    };

    // -------------------------------------------------------------------

    /** Loads the material table for the NFF2 file format from an

     *  external file.

     *

     *  @param output Receives the list of output meshes

     *  @param path Path to the file (abs. or rel.)

     *  @param pIOHandler IOSystem to be used to open the file

    */

    void LoadNFF2MaterialTable(std::vector<ShadingInfo> &output,

            const std::string &path, IOSystem *pIOHandler);

};

} // end of namespace Assimp

#endif // AI_NFFIMPORTER_H_IN