CollisionObject.h

/*
	Greyout - a colourful platformer about love

	Greyout is Copyright (c)2011-2014 Janek Schäfer

	This file is part of Greyout.

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

	Greyout 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 General Public License for more details.

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

	Please direct any feedback, questions or comments to
	Janek Schäfer (foxblock), foxblock_at_gmail_dot_com
*/

#ifndef COLLISIONOBJECT_H
#define COLLISIONOBJECT_H

#include <vector>

#include "SimpleDirection.h"
#include "Vector2df.h"
#include "Colour.h"

/**
Contains information about the last collision check, such as the collising pixels, correction, etc.
Also provides functions for analysing said data
**/

struct MapCollisionEntry
{
	SimpleDirection dir;
	Vector2df pos;
	Colour col;
	Vector2df correction; // currently unused
};

class BaseUnit;

struct UnitCollisionEntry
{
	SimpleDirection dir;
	Vector2df overlap;
	BaseUnit* unit;
};

class CollisionObject
{
	public:
		CollisionObject();
		virtual ~CollisionObject();

		virtual void clear();

		/// Analysing functions
		bool isBeingSquashed() const;
		bool isHealthy(const Vector2df& vel);

		// Contains the checked pixels
		vector<MapCollisionEntry> pixels;
		// Total velocity correction, calculated by Physics
		Vector2df correction;
		// Total position correction - this correction will only affect the next
		// cycle directly and is usually caused by vertical/slope correction to
		// avoid rocketing the player in the air
		Vector2df positionCorrection;

		// count the ticks in which the unit is being squashed here
		// if that value reaches a certain value the unit will explode
		int squashCounter;
		int squashThreshold;

		// Hold all units with which the unit collided
		vector<UnitCollisionEntry> units;
	protected:

	private:
};



#endif // COLLISIONOBJECT_H