/*
   render/lightenvironment.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_RENDER_LIGHTENVIRONMENT_H__
#define __INCLUDED_RENDER_LIGHTENVIRONMENT_H__

#include <vector>

#include "render/light.h"

namespace render
{

/**
 * @brief a collection of lights
 * */
class LightEnvironment
{
public:
	LightEnvironment();
	
	~LightEnvironment();
	
	/**
	 * @brief enable all lights in the environment
	 * */
	void enable();
	
	/**
	 * @brief disable all lights in the environment
	 * */
	void disable();
	
	/**
	 * @brief remove all lights in the environment
	 * */
	void clear();
	
	/**
	 * @brief add a light to the environment
	 * */
	void add(Light *light);
	
	/**
	 * @brief transfer light environment to OpenGL state
	 */
	void draw();
	
	/**
	 * @brief transfer light environment to OpenGL state
	 */
	void draw(const math::Vector3f translate);
	
	/**
	 * @brief number of lights in the environment
	 * */
	inline size_t size() const {
		return env_container.size();
	}
		
private:
	typedef std::vector <Light *> Container;

	Container	env_container;
	
	int		env_base_id;
	
	float		env_attenuation;
	float		env_ambient_intensity;
	float		env_diffuse_intensity;
	float		env_specular_intensity;
};

}

#endif // __INCLUDED_RENDER_LIGHTENVIRONMENT_H__