sprites.h Example File

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 /*
  * KAsteroids - Copyright (c) Martin R. Jones 1997
  *
  * Part of the KDE project
  */

 #ifndef __SPRITES_H__
 #define __SPRITES_H__

 #include "animateditem.h"

 #define ID_ROCK_LARGE           1024
 #define ID_ROCK_MEDIUM          1025
 #define ID_ROCK_SMALL           1026

 #define ID_MISSILE              1030

 #define ID_BIT                  1040
 #define ID_EXHAUST              1041

 #define ID_ENERGY_POWERUP       1310
 #define ID_TELEPORT_POWERUP     1311
 #define ID_BRAKE_POWERUP        1312
 #define ID_SHIELD_POWERUP       1313
 #define ID_SHOOT_POWERUP        1314

 #define ID_SHIP                 1350
 #define ID_SHIELD               1351

 #define MAX_SHIELD_AGE          350
 #define MAX_POWERUP_AGE         500
 #define MAX_MISSILE_AGE         40

 class KMissile : public AnimatedPixmapItem
 {
 public:
     KMissile( const QList<QPixmap> &s, QGraphicsScene *c ) : AnimatedPixmapItem( s, c )
         { myAge = 0; }

     virtual int type() const { return ID_MISSILE; }

     void growOlder() { myAge++; }
     bool expired() { return myAge > MAX_MISSILE_AGE; }

 private:
     int myAge;
 };

 class KBit : public AnimatedPixmapItem
 {
 public:
     KBit( const QList<QPixmap> &s, QGraphicsScene *c ) : AnimatedPixmapItem( s, c )
         {  death = 7; }

     virtual int type() const {  return ID_BIT; }

     void setDeath( int d ) { death = d; }
     void growOlder() { death--; }
     bool expired() { return death <= 0; }

 private:
     int death;
 };

 class KExhaust : public AnimatedPixmapItem
 {
 public:
     KExhaust( const QList<QPixmap> &s, QGraphicsScene *c ) : AnimatedPixmapItem( s, c )
         {  death = 1; }

     virtual int type() const {  return ID_EXHAUST; }

     void setDeath( int d ) { death = d; }
     void growOlder() { death--; }
     bool expired() { return death <= 0; }

 private:
     int death;
 };

 class KPowerup : public AnimatedPixmapItem
 {
 public:
   KPowerup( const QList<QPixmap> &s, QGraphicsScene *c, int t ) : AnimatedPixmapItem( s, c ),
         myAge( 0 ), _type(t) { }

   virtual int type() const { return _type; }

   void growOlder() { myAge++; }
   bool expired() const { return myAge > MAX_POWERUP_AGE; }

 protected:
   int myAge;
   int _type;
 };

 class KRock : public AnimatedPixmapItem
 {
 public:
     KRock (const QList<QPixmap> &s, QGraphicsScene *c, int t, int sk, int st) : AnimatedPixmapItem( s, c )
         { _type = t; skip = cskip = sk; step = st; }

     void nextFrame()
         {
             if (cskip-- <= 0) {
                 setFrame( (frame()+step+frameCount())%frameCount() );
                 cskip = QABS(skip);
             }
         }

     virtual int type() const { return _type; }

 private:
     int _type;
     int skip;
     int cskip;
     int step;
 };

 class KShield : public AnimatedPixmapItem
 {
 public:
   KShield( QList<QPixmap> &s, QGraphicsScene *c )
       : AnimatedPixmapItem( s, c ) {}

   virtual int type() const { return ID_SHIELD; }
 };

 #endif