Enemy.h

#include "Arduino.h"

class Enemy
{
public:
	void Spawn(int pos, char dir, int sp, int wobble);
	void Tick();
	void Kill();
	bool Alive();
	int _pos;
	int _wobble;
	char playerSide;
private:
	char _dir;
	int _sp;
	bool _alive;
	int _origin;
};

void Enemy::Spawn(int pos, char dir, int sp, int wobble) {
	_pos = pos;
	_dir = dir;          // 0 = left, 1 = right
	_wobble = wobble;    // 0 = no, >0 = yes, value is width of wobble
	_origin = pos;
	_sp = sp;
	_alive = true;
}

void Enemy::Tick() {
	if (_alive) {
		if (_wobble > 0) {
			_pos = _origin + (sin((millis() / 3000.0)*_sp)*_wobble);
		}
		else {
			if (_dir == 0) {
				_pos -= _sp;
			}
			else {
				_pos += _sp;
			}
			if (_pos > 1000) {
				Kill();
			}
			if (_pos <= 0) {
				Kill();
			}
		}
	}
}

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

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