/**
	This file is a part of our_dick
	Copyright (C) 2020 rexy712

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef OUR_DICK_ENGINE_OBJECT_HPP
#define OUR_DICK_ENGINE_OBJECT_HPP

#include <rml/math.hpp>
#include "base_types.hpp"

namespace egn{

	class object
	{
	protected:
		enum update{
			NO_UPDATE,
			SCALE_UPDATE = 1,
			TRANSLATION_UPDATE = 2,
			ROTATION_UPDATE = 4,
			BOUNDING_VOLUME_UPDATE = 8,
		};
	protected:
		rml::vec3f m_position;                 //track current positon in world space
		rml::quat_f m_orientation;             //track current model space rotation
		rml::vec3f m_scale{1.0f, 1.0f, 1.0f};  //track model space scale
	private:
		mutable rml::mat4f m_model_matrix;     //compile all the above info into a matrix
	protected:
		mutable int m_update_flag = NO_UPDATE;  //whether or not to update the matrix upon access
		                                        //make the update flag protected so subclasses can share it

	public:
		object(void) = default;
		explicit object(const rml::vec3f& position);
		object(const rml::vec3f& position, const rml::quat_f& orientation);
		object(const object&) = default;
		object(object&&) = default;
		virtual ~object(void) = default;

		object& operator=(const object&) = default;
		object& operator=(object&&) = default;

		void translate(const rml::vec3f& distance);
		void rotate(const rml::quat_f& distance);
		void scale(const rml::vec3f& distance);
		void look_at(const rml::vec3f& targ, const rml::vec3f& up);

		virtual void set_position(const rml::vec3f& pos);
		virtual void set_orientation(const rml::quat_f& orient);
		virtual void set_scale(const rml::vec3f& scale);

		const rml::mat4f& model_matrix(void)const;
		const rml::vec3f& position(void)const;
		const rml::vec3f& scale(void)const;
		const rml::quat_f& orientation(void)const;

	protected:
		void recalc_model_matrix(void)const;
	};

}

#endif