map.h

#ifndef MAP_HEADER_FILE__
#define MAP_HEADER_FILE__

#include "SDL/SDL.h"

/*
This file contains definitions for dealing with the depth of the
water and placing of thermal layers.
*/

#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif

#define MAX_DEPTH        5000  // deepest part of the ocean
#define MIN_DEPTH           0  // most shallow point of the ocean
#define MAX_THERMALS        3
#define MAX_THERMAL_DEPTH 900
#define THERMAL_FILTER      0.15

// MAP_MIN and MAP_MAX are also defined in the coord class
#ifndef MAP_MIN
#define MAP_MIN 0
#endif
#ifndef MAP_MAX
#define MAP_MAX 300000
#endif

#define SCREEN_NAV  2
#define SCREEN_HELM 4

class MAP
{
public:
    int thermals[MAX_THERMALS];

    MAP();
    ~MAP();
    void InitGraphics(SDL_Surface *screen);
    int Init();
    int Create_Thermal_Layers(int how_many);

    int Get_Ocean_Depth(int x, int y);
    int Thermals_Between(int depth_1, int depth_2);
    int Next_Up(int current_depth);    // find thermal from our position
    int Next_Down(int current_depth);  // find thermal from our position

    void Draw_Depth_Meter(int depth, int screen_number);

    #ifdef DEBUGMAP
    void Test_Map();
    #endif

private:
    SDL_Surface *screen;

    Uint32 white, red, mapcolor;
};

#endif  // MAP_HEADER_FILE__