source: GTP/trunk/Lib/Geom/shared/GTGeometry/include/GeoLodManager.h @ 1310

/*==========================================================================
 *      (C) 2006 Universidad Jaime I de Castellón
 *==========================================================================
 *      PROYECT:        GAME TOOLS
 *==========================================================================*/
/*      CONTENT:
 *
 *
 *      @file   GeoLodManager.h
 *==========================================================================*/

#ifndef _GEOLODMANAGER
#define _GEOLODMANAGER

#include "GeoVector3.h"
#include "GeoLodObject.h"
#include <map>
#include <vector>

namespace Geometry
{
        class lodobj_dist_node_t
        {
        public:
                lodobj_dist_node_t(float dist, LodObject *o):dist2cam(dist),lodobj(o){ must_recalculate_distance=false; }
                float dist2cam;
                LodObject *lodobj;
                bool must_recalculate_distance;
                bool operator < (const lodobj_dist_node_t &o) const { return (dist2cam < o.dist2cam); }
        };

        class LodManager
        {       
        public:
                LodManager(float near, float far, const Geometry::Vector3 &campos);
                void AddLodObj(LodObject*, const Geometry::Vector3 &);
                void UpdateLOD(void);
                void UpdateCamera(const Geometry::Vector3 &);
                void UpdateLODObjectPos(LodObject*,const Geometry::Vector3 &);
        private:
                std::vector<lodobj_dist_node_t> lodobj_dists; // key: dist2cam for efficient distance finding
                std::map<uint32,Geometry::Vector3> lodobj_pos; // map key: LodObject UniqueID for efficient ID-based finding
                unsigned int targetFPS;
                Vector3 camera_pos;
                bool camera_changed;
                float near_range, far_range;
                float CalculateDistToCamera(const Geometry::Vector3 &) const;
                float SelectRandomDistance(void) const;
                void RecalculateDist(lodobj_dist_node_t & node);
        };
};

#endif