//
// Handle rendering of landscape
//
// Copyright (C) J. Belson	2001.12.06
//
// $Author: jon $ : $Date: 2003/05/19 13:55:58 $
//


#ifndef _SCENE_LAND_H_
#define _SCENE_LAND_H_

#include "env_map.h"
#include "handler_base.h"
#include "handler_sky.h"
#include "perlin2.h"
#include "vector3d.h"


class texture;


/**
 * Handle rendering of ground
 */
class handler_land : public handler_base {

private:
	hfield*		land;

	hfield*		hf_sky;
	handler_sky* 	sky;

	float		wave_height;
	float		wave_scale;
	float		water_reflectivity;
	float		water_level;

	vector3d	light;

	// Used for generating water ripples
	perlin2		wave_x, wave_y, wave_z;

	int			num_tri;
	int			call_count;

	texture*	text;

	// Environmental map for reflections
	env_map*	map;

	bool first;

	// Calculate height for specified point
	virtual float get_height(float x, float y);

	virtual void process_patch(
					const point3d& p1, const point3d& p2,
					const point3d& p3, const point3d& p4
					);

	// Check if triangle is sea
	bool check_sea_level(triangle3d& t, const point3d* pnt3d);

	// Apply water ripples to points
	void make_waves(point3d* pnt3d, int num_points);

public:
	handler_land(int w, int h, const render_info& info);
	~handler_land();

	virtual void render(void);

	virtual void set_heightfield(hfield* hf);
	virtual void set_env_map(env_map* m);
};

#endif	// _SCENE_LAND_H_