ArrowBullet.h

#ifndef _ARROW_BULLET_H_
#define _ARROW_BULLET_H_

#include "Item.h"

class ArrowBullet : public Item
{
public:
	static constexpr int ARROW_WIDTH = 8;

	ArrowBullet();
	ArrowBullet(bool isArrow);
	virtual bool Update(UpdateStep step);
	void Fire(int x, unsigned char y, bool isMovingToLeft);
	void KillBulletWithoutSparks();

private:
	static constexpr int BULLET_SPEED = 4;
	static constexpr int BULLET_WIDTH = 3;
	static constexpr int ARROW_SPEED = 2;
	static constexpr int SPARKS_ANIM_SPEED = 3;
	static constexpr int NO_PIXEL_FOUND = 60000; // special return value for SearchForPixelColorAlongBulletRay() when no color is found
	
	union
	{
		unsigned char CurrentBulletSpeed; // the current speed (which could be null on the first frame)
		unsigned char SparksAnimFrameId; // the frame id to play sparks when the bullet hit the wall
	};
	
	unsigned char GetWidth();
	void DrawBulletRay(unsigned char color);
	int SearchForPixelColorAlongBulletRay(unsigned char color);
};

#endif