ghost.h

RGA: Biowaste Game Example This C++ application demonstrates how to create a 2D mobile game for S60

/*
* ==============================================================================
*  Name        : Ghost.h
*  Part of     : RGA Game Example
*  Interface   :
*  Description : ghost sprites
*  Version     : 1.0
*
*  Copyright (c) 2007-2008 Nokia Corporation.
*  This material, including documentation and any related
*  computer programs, is protected by copyright controlled by
*  Nokia Corporation.
* ==============================================================================
*/

#ifndef __GHOST_H__
#define __GHOST_H__


#include "RotatingSprite.h"
#include "Level.h"

class CGhost : public CRotatingSprite
	{
	public:
		CGhost(CApplicationBase& aApp, CLevel& aLevel);
		virtual ~CGhost();

		/**
		 * Init
		 * initialise ghost with given images
		 * @param aBitmap sprite image
		 * @param aMask sprite alpha mask, or NULL
		 * @return KErrNone if successfull
		 */
		TInt Init(	IBitmap* aBitmap,
					IBitmap* aMask);
		
		/**
		 * Update
		 * updates ghost object, run AI
		 * @param aFrametime frame time multiplier
		 */
		virtual void Update(const TReal64 aFrametime);
		
		/**
		 * Draw
		 * draw ghost to its current location
		 * sprite is drawn rotated based on current angle
		 * @param aContext context to draw sprite into
		 * @param aCamera camera coordinate to subtract from sprite coordinates
		 */
		virtual void Draw(IGraphicsContext& aContext, const TVector2& aCamera);
		
		/**
		 * SetAIParams
		 * set parameters related to ghost AI
		 * @param aPlayer player to chase
		 * @param aStartPos starting position of the ghost
		 * @param aEndPos 'move-to' position of the ghost
		 * @param aExtraParam ghost specific value
		 * @param aType type of the ghost (bitmapindex)
		 */
		void SetAIParams(	CSpriteBase* aPlayer,
							const TPoint& aStartPos,
							const TPoint& aEndPos,
							const TInt aExtraParam,
							const TInt aType);
		
	private:
		/**
		 * UpdateAIRed
		 * update red ghost AI (chase player)
		 * @param aFrametime application frame time
		 */
		void UpdateAIRed(const TReal64 aFrametime);
		
		/**
		 * UpdateAIGreen
		 * update green ghost AI (patrol points)
		 * @param aFrametime application frame time
		 */
		void UpdateAIGreen(const TReal64 aFrametime);
		
		/**
		 * UpdateAIBlue
		 * update blue ghost AI (gravity ghost)
		 * @param aFrametime application frame time
		 */
		void UpdateAIBlue(const TReal64 aFrametime);

	private:	// data
		CLevel&				iLevel;

		// AI parameters
		CSpriteBase*		iPlayer;
		TPoint				iStartPos;
		TPoint				iEndPos;
		TReal64				iSpeed;
		TReal64				iPullForce;
		TBool				iMovingToEndPos;
	};


#endif /* __GHOST_H__ */