Particle.h

#include "Arduino.h"
#define FRICTION 1

class Particle
{
public:
	void Spawn(int pos);
	void Tick(int USE_GRAVITY);
	void Kill();
	bool Alive();
	int _pos;
	int _power;
private:
	int _life;
	bool _alive;
	int _sp;
};

void Particle::Spawn(int pos) {
	_pos = pos;
	_sp = random(-200, 200);
	_power = 255;
	_alive = true;
	_life = 220 - abs(_sp);
}

void Particle::Tick(int USE_GRAVITY) {
	if (_alive) {
		_life++;
		if (_sp > 0) {
			_sp -= _life / 10;
		}
		else {
			_sp += _life / 10;
		}
		if (USE_GRAVITY && _pos > 500) _sp -= 10;
		_power = 100 - _life;
		if (_power <= 0) {
			Kill();
		}
		else {
			_pos += _sp / 7.0;
			if (_pos > 1000) {
				_pos = 1000;
				_sp = 0 - (_sp / 2);
			}
			else if (_pos < 0) {
				_pos = 0;
				_sp = 0 - (_sp / 2);
			}
		}
	}
}

bool Particle::Alive() {
	return _alive;
}

void Particle::Kill() {
	_alive = false;
}