//
// Handle and render scene
//
// Copyright (C) J. Belson	2001.07.15
//
// $Author: jon $ : $Date: 2003/06/03 16:46:53 $
//


#ifndef _SCENE_H_
#define _SCENE_H_

#include "fcolour.h"
#include "matrix.h"
#include "point2d.h"
#include "point3d.h"
#include "render_info.h"

#include "types.h"
#include "vector2d.h"
#include "vector3d.h"


class bm_window;
class env_map;
class hfield;
class progress;
class renderer;
class scene;
class settings;
class zbuffer;


// Pointer to patch handling function
typedef void (scene::*patch_func)(const point3d& p1, const point3d& p2, const point3d& p3, const point3d& p4);


/**
 * Set up and render current scene.  We use the convention that the
 *  -ve Z axis goes into the screen.
 */
class scene {

private:
	hfield*		land;
	bool		sky;

	point3d		viewpoint;		// View position

	matrix		camera;			// Camera transformation matrix

	float		threshold;

	int			scene_width, scene_height;
	int			distance;

	// Details for render target
	uint32*		fbuffer;
	int			bytes_per_row;

	renderer*	rend;
	zbuffer*	zb;
	progress*	prog;

	// Used for viewing transform
	float offset_x, offset_y;
	float scale_x, scale_y;

	bool		use_env;
	env_map*	env;

	bool		show_env_maps;

	enum {
		DEFAULT_MAP_WIDTH	 	= 256 + 1,
		ENV_MAP_SIZE			= 320
	};

	// Rendering options
	bool textures;
	bool shadows;
	bool reflections;
	bool atmospherics;
	bool lighting;

	settings* my_settings;

	void make_row(point3d* points, int row, float start, float end, float step);

	// Create a camera matrix for given heading
	matrix make_camera_matrix(const vector3d& heading);

	// Display environmental reflection map for debugging purposes
	void show_env_map(void);


public:
	scene(bm_window* win);
	~scene();

	void set_land(hfield* hf);
	void set_sky(bool b);
	void set_light(const vector3d& v);

	// Set camera position and view direction
	void set_view(const point3d& pos, const vector3d heading);

	// Control various render details
	void set_textures(bool b);
	void set_shadows(bool b);
	void set_reflections(bool b);
	void set_atmospherics(bool b);
	void set_detail(int detail);

	void render(void);
};

#endif	// _SCENE_H_