source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/ResourceManager.h @ 3237

#ifndef __RESOURCEMANAGER_H__
#define __RESOURCEMANAGER_H__


#include <string>
#include <iostream>
#include <fstream>
#include <map>
#include "common.h"



class igzstream;


namespace CHCDemoEngine
{

class SceneEntity;
class Material;
class Geometry;
class Texture;
class Matrix4x4;
class Transform3;
class ShaderProgram;


/** Loads a scene and also handles the cleanup
*/
class ResourceManager
{
public:

        /** Loads a scene containing of several scene entities. the entities are added to
                the previously loaded entities. Returns the number of entities in the
                scene.
        */
        int Load(const std::string &filename, SceneEntityContainer &geometry);
        /** Returns number of scene entities loaded with this manager.
        */
        int GetNumEntities() const { return (int)mSceneEntities.size(); }
        /** Returns pointer to shape container.
        */
        const ShapeContainer * const GetShapes() const { return &mShapes; }
        /** Returns pointer to scene entity container.
        */
        const SceneEntityContainer * const GetSceneEntities() const { return &mSceneEntities; }
        /** Returns the resource manager as a singleton.
        */
        inline static ResourceManager *GetSingleton();
        /** We also want full control over the delete.
        */
        static void DelSingleton();
        /** Adds a scene entity to the resource mananger, which from now on is handled by the manager.
        */
        void AddSceneEntity(SceneEntity *ent);
        /** Creates a new transform.
        */
        Transform3 *CreateTransform(const Matrix4x4 &m);
        /** Creates a new default material that is handled by the manager.
        */
        Material *CreateMaterial();

        /////////////////

        /// giant hack: set this to true if the geometry to load has tangent data for normal mapping
        bool mUseNormalMapping;
        bool mUseSpecialColors;


protected:
        
        /** Default constructor. The constructor is protected
                to have control over instantiation using the 
                singleton pattern.
        */
        ResourceManager();

        ~ResourceManager();

        int LoadTextures(igzstream &str);
        int LoadShapes(igzstream &str);
        int LoadSceneEntities(igzstream &str, SceneEntityContainer &entities);

        SceneEntity *LoadSceneEntity(igzstream &str);
        Material *LoadMaterial(igzstream &str);
        Geometry *LoadGeometry(igzstream &str);


        std::map<int, Texture *> mTextureTable;
        std::map<int, Material *> mMaterialTable;
        std::map<int, Geometry *> mGeometryTable;
        //std::map<int, Shape *> mShapesTable;


        /////////////
        //-- these are kept to be able to delete these resources afterwards

        TextureContainer mTextures;
        MaterialContainer mMaterials;
        GeometryContainer mGeometry;
        TransformContainer mTrafos;
        ShapeContainer mShapes;
        
        /// the scene entities
        SceneEntityContainer mSceneEntities;

private:

        static ResourceManager *sResourceManager;
};


ResourceManager *ResourceManager::GetSingleton()
{
        if (!sResourceManager)
                sResourceManager = new ResourceManager();
        
        return sResourceManager;
}


}
#endif