//¥ ------------------------------------------------------------------------------------------  ¥

//¥

//¥ Copyright © 1996 Apple Computer, Inc., All Rights Reserved

//¥

//¥

//¥     You may incorporate this sample code into your applications without

//¥     restriction, though the sample code has been provided "AS IS" and the

//¥     responsibility for its operation is 100% yours.  However, what you are

//¥     not permitted to do is to redistribute the source as "DSC Sample Code"

//¥     after having made changes. If you're going to re-distribute the source,

//¥     we require that you make it clear in the source that the code was

//¥     descended from Apple Sample Code, but that you've made changes.

//¥

//¥     Authors:

//¥         Chris De Salvo

//¥

//¥ ------------------------------------------------------------------------------------------  ¥

#ifndef __GAMEOBJECT__

#define __GAMEOBJECT__

//¥ ------------------------------  Includes

#include "Particles.h"

#include "Sprite.h"

//¥ ------------------------------  Public Definitions

typedef enum ObjectKind

{

    objectEnemy,

    objectEnemyShot,

    objectGreenPlayer,

    objectGreenPlayerShot,

    objectRedPlayer,

    objectRedPlayerShot,

    objectEnemyParticles,

    objectPlayerParticles,

    objectPlasmaParticles,

    objectMissileParticles

} ObjectKind;

//¥ ------------------------------  Public Types

//¥ Forward declaration of this structure so we can build a link list of

//¥ them within the actual structure

struct GameObject;

typedef struct GameObject GameObject, *GameObjectPtr, **GameObjectHandle;

typedef void (*ObjectAction)(GameObjectPtr theObject);

struct GameObject

{

    GameObjectPtr   next;

    GameObjectPtr   prev;

    ObjectKind      kind;

    Rect            screenRect;     //¥ The area of the screen that the object was last drawn in

    Rect            oldScreenRect;  //¥ Last rect where the sprite was drawn

    SInt16          screenX;        //¥ Where the hotspots are in screen space

    SInt16          screenY;

    SInt16          velocityH;

    SInt16          velocityV;

    Rect            bounds;         //¥ The object must stay within this rectangle.  This is defined in screen space

    SInt16          frame;          //¥ Which frame of animation is being displayed

    UInt32          time;           //¥ Local time for this object

    union

    {

        SpritePtr   sprite;         //¥ Animation frames and hot-spots for this object

        ParticlesPtr particles;     //¥ Particle system for particle objects

    } objectData;

    ObjectAction    action;         //¥ This function controls all object actions

    UInt32          refCon;         //¥ Client-defined 32-bit scratch variable

};

//¥ ------------------------------  Public Variables

extern unsigned long    gNumGameObjects;

//¥ ------------------------------  Public Functions

#ifdef __cplusplus

extern "C" {

#endif

extern GameObjectPtr GameObjectAllocate(void);

extern void GameObjectDispose(GameObjectPtr go);

extern void GameObjectAddToList(GameObjectPtr *list, GameObjectPtr go);

extern void GameObjectRemoveFromList(GameObjectPtr *list, GameObjectPtr go);

extern void GameObjectDisposeList(GameObjectPtr *list);

extern void GameObjectSetSprite(GameObjectPtr go, SpritePtr sprite);

extern SpritePtr GameObjectGetSprite(GameObjectPtr go);

extern void GameObjectSetParticles(GameObjectPtr go, ParticlesPtr particles);

extern ParticlesPtr GameObjectGetParticles(GameObjectPtr go);

extern void GameObjectSetBounds(GameObjectPtr go, RectPtr r);

extern RectPtr GameObjectGetBounds(GameObjectPtr go);

extern void GameObjectListAdvance(GameObjectPtr list);

extern void GameObjectListDraw(GameObjectPtr list, CGrafPtr dest);

extern UInt32 GameObjectListCount(GameObjectPtr list);

#ifdef __cplusplus

}

#endif

#endif