//
// env_map.h
//
// Environmental mapping for sky
//
// Copyright (C) J. Belson	2003.5.3
//


#ifndef _ENV_MAP_H_
#define _ENV_MAP_H_


#include "fcolour.h"
#include "types.h"
#include "vector3d.h"


class env_map {

private:
	// Six maps, one for each side of the cube
	uint32* maps[6];
	int size;

	// Pick the appropriate map for given view vector
	int pick_map(const vector3d& v) const;

	// Return colour from map
	fcolour read_map(int x, int y, int map_num) const;

	// Clear map
	void clear_map(int map_num);

public:
	env_map(int env_map_size);
	~env_map();

	// Relationship between maps and view direction
	enum {
		FORWARD, RIGHT, UP, LEFT, DOWN, BACK
	};

	// Return specified map
	uint32* get_map(int map_num) const;

	// Return the colour in specified direction
	fcolour get_colour(const vector3d& view) const;

};

#endif	// _ENV_MAP_H