tile_map_view.h

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#ifndef TILE_MAP_TILE_MAP_VIEW_H_
#define TILE_MAP_TILE_MAP_VIEW_H_

#include <string>

#include <boost/functional/hash.hpp>

#include <tile_map/texture_cache.h>

#include <tile_map/tile_source.h>

#include <swri_transform_util/transform.h>

namespace tile_map
{
  class TileSource;

  struct Tile
  {
  public:
    std::string url;
    size_t url_hash;
    int32_t level;
    int32_t subdiv_count;
    double subwidth;
    
    TexturePtr texture;
    
    std::vector<tf::Vector3> points;
    std::vector<tf::Vector3> points_t;
  };

  class TileMapView
  {
  public:
    TileMapView();

    void ResetCache();

    void SetTileSource(const TileSource& tile_source);

    void SetTransform(const swri_transform_util::Transform& transform);
    
    void SetView(
      double latitude, 
      double longitude, 
      double scale, 
      int32_t width,
      int32_t height);
      
    void Draw();
    
  private:
    TileSource tile_source_;

    swri_transform_util::Transform transform_;
    
    int32_t level_;
    
    int64_t center_x_;
    int64_t center_y_;
    
    int64_t size_;
    
    int32_t width_;
    int32_t height_;
    
    std::vector<Tile> tiles_;
    std::vector<Tile> precache_;
    
    boost::hash<std::string> hash_function_;
    TextureCachePtr tile_cache_;
    
    void ToLatLon(int32_t level, double x, double y, double& latitude, double& longitude);
    
    void InitializeTile(int32_t level, int64_t x, int64_t y, Tile& tile);
  };
}

#endif  // TILE_MAP_TILE_MAP_VIEW_H_