5 files changed, 274 insertions, 19 deletions

diff --git a/noncore/games/sfcave/random.cpp b/noncore/games/sfcave/random.cpp
new file mode 100644
index 0000000..c4c10bb
--- a/dev/null
+++ b/noncore/games/sfcave/random.cpp
@@ -0,0 +1,179 @@
+/* -------------------------------------------------------------------------
+ * This is an ANSI C library for multi-stream random number generation.  
+ * The use of this library is recommended as a replacement for the ANSI C 
+ * rand() and srand() functions, particularly in simulation applications 
+ * where the statistical 'goodness' of the random number generator is 
+ * important.  The library supplies 256 streams of random numbers; use 
+ * SelectStream(s) to switch between streams indexed s = 0,1,...,255.
+ *
+ * The streams must be initialized.  The recommended way to do this is by
+ * using the function PlantSeeds(x) with the value of x used to initialize 
+ * the default stream and all other streams initialized automatically with
+ * values dependent on the value of x.  The following convention is used 
+ * to initialize the default stream:
+ *    if x > 0 then x is the state
+ *    if x < 0 then the state is obtained from the system clock
+ *    if x = 0 then the state is to be supplied interactively.
+ *
+ * The generator used in this library is a so-called 'Lehmer random number
+ * generator' which returns a pseudo-random number uniformly distributed
+ * 0.0 and 1.0.  The period is (m - 1) where m = 2,147,483,647 and the
+ * smallest and largest possible values are (1 / m) and 1 - (1 / m)
+ * respectively.  For more details see:
+ * 
+ *       "Random Number Generators: Good Ones Are Hard To Find"
+ *                   Steve Park and Keith Miller
+ *              Communications of the ACM, October 1988
+ *
+ * Name            : rngs.c  (Random Number Generation - Multiple Streams)
+ * Authors         : Steve Park & Dave Geyer
+ * Language        : ANSI C
+ * Latest Revision : 09-22-98
+ * ------------------------------------------------------------------------- 
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include "random.h"
+
+#define MODULUS    2147483647 /* DON'T CHANGE THIS VALUE                  */
+#define MULTIPLIER 48271      /* DON'T CHANGE THIS VALUE                  */
+#define CHECK      399268537  /* DON'T CHANGE THIS VALUE                  */
+#define STREAMS    256        /* # of streams, DON'T CHANGE THIS VALUE    */
+#define A256       22925      /* jump multiplier, DON'T CHANGE THIS VALUE */
+#define DEFAULT    123456789  /* initial seed, use 0 < DEFAULT < MODULUS  */
+      
+static long seed[STREAMS] = {DEFAULT};  /* current state of each stream   */
+static int  stream        = 0;          /* stream index, 0 is the default */
+static int  initialized   = 0;          /* test for stream initialization */
+
+
+   double Random(void)
+/* ----------------------------------------------------------------
+ * Random returns a pseudo-random real number uniformly distributed 
+ * between 0.0 and 1.0. 
+ * ----------------------------------------------------------------
+ */
+{
+  const long Q = MODULUS / MULTIPLIER;
+  const long R = MODULUS % MULTIPLIER;
+        long t;
+
+  t = MULTIPLIER * (seed[stream] % Q) - R * (seed[stream] / Q);
+  if (t > 0) 
+    seed[stream] = t;
+  else 
+    seed[stream] = t + MODULUS;
+  return ((double) seed[stream] / MODULUS);
+}
+
+
+   void PlantSeeds(long x)
+/* ---------------------------------------------------------------------
+ * Use this function to set the state of all the random number generator 
+ * streams by "planting" a sequence of states (seeds), one per stream, 
+ * with all states dictated by the state of the default stream. 
+ * The sequence of planted states is separated one from the next by 
+ * 8,367,782 calls to Random().
+ * ---------------------------------------------------------------------
+ */
+{
+  const long Q = MODULUS / A256;
+  const long R = MODULUS % A256;
+        int  j;
+        int  s;
+
+  initialized = 1;
+  s = stream;                            /* remember the current stream */
+  SelectStream(0);                       /* change to stream 0          */
+  PutSeed(x);                            /* set seed[0]                 */
+  stream = s;                            /* reset the current stream    */
+  for (j = 1; j < STREAMS; j++) {
+    x = A256 * (seed[j - 1] % Q) - R * (seed[j - 1] / Q);
+    if (x > 0)
+      seed[j] = x;
+    else
+      seed[j] = x + MODULUS;
+   }
+}
+
+
+   void PutSeed(long x)
+/* ---------------------------------------------------------------
+ * Use this function to set the state of the current random number 
+ * generator stream according to the following conventions:
+ *    if x > 0 then x is the state (unless too large)
+ *    if x < 0 then the state is obtained from the system clock
+ *    if x = 0 then the state is to be supplied interactively
+ * ---------------------------------------------------------------
+ */
+{
+  char ok = 0;
+
+  if (x > 0)
+    x = x % MODULUS;                       /* correct if x is too large  */
+  if (x < 0)                                 
+    x = ((unsigned long) time((time_t *) NULL)) % MODULUS;              
+  if (x == 0)                                
+    while (!ok) {
+      printf("\nEnter a positive integer seed (9 digits or less) >> ");
+      scanf("%ld", &x);
+      ok = (0 < x) && (x < MODULUS);
+      if (!ok)
+        printf("\nInput out of range ... try again\n");
+    }
+  seed[stream] = x;
+}
+
+
+   void GetSeed(long *x)
+/* ---------------------------------------------------------------
+ * Use this function to get the state of the current random number 
+ * generator stream.                                                   
+ * ---------------------------------------------------------------
+ */
+{
+  *x = seed[stream];
+}
+
+
+   void SelectStream(int index)
+/* ------------------------------------------------------------------
+ * Use this function to set the current random number generator
+ * stream -- that stream from which the next random number will come.
+ * ------------------------------------------------------------------
+ */
+{
+  stream = ((unsigned int) index) % STREAMS;
+  if ((initialized == 0) && (stream != 0))   /* protect against        */
+    PlantSeeds(DEFAULT);                     /* un-initialized streams */
+}
+
+
+   void TestRandom(void)
+/* ------------------------------------------------------------------
+ * Use this (optional) function to test for a correct implementation.
+ * ------------------------------------------------------------------    
+ */
+{
+  long   i;
+  long   x;
+  double u;
+  char   ok = 0;  
+
+  SelectStream(0);                  /* select the default stream */
+  PutSeed(1);                       /* and set the state to 1    */
+  for(i = 0; i < 10000; i++)
+    u = Random();
+  GetSeed(&x);                      /* get the new state value   */
+  ok = (x == CHECK);                /* and check for correctness */
+
+  SelectStream(1);                  /* select stream 1                 */ 
+  PlantSeeds(1);                    /* set the state of all streams    */
+  GetSeed(&x);                      /* get the state of stream 1       */
+  ok = ok && (x == A256);           /* x should be the jump multiplier */    
+  if (ok)
+    printf("\n The implementation of rngs.c is correct.\n\n");
+  else
+    printf("\n\a ERROR -- the implementation of rngs.c is not correct.\n\n");
+}
diff --git a/noncore/games/sfcave/random.h b/noncore/games/sfcave/random.h
new file mode 100644
index 0000000..4bc7c06
--- a/dev/null
+++ b/noncore/games/sfcave/random.h
@@ -0,0 +1,19 @@
+/* ----------------------------------------------------------------------- 
+ * Name            : rngs.h  (header file for the library file rngs.c) 
+ * Author          : Steve Park & Dave Geyer
+ * Language        : ANSI C
+ * Latest Revision : 09-22-98
+ * ----------------------------------------------------------------------- 
+ */
+
+#if !defined( _RNGS_ )
+#define _RNGS_
+
+double Random(void);
+void   PlantSeeds(long x);
+void   GetSeed(long *x);
+void   PutSeed(long x);
+void   SelectStream(int index);
+void   TestRandom(void);
+
+#endif
diff --git a/noncore/games/sfcave/sfcave.cpp b/noncore/games/sfcave/sfcave.cpp
index 788606f..b5bc736 100644
--- a/noncore/games/sfcave/sfcave.cpp
+++ b/noncore/games/sfcave/sfcave.cpp
@@ -3,2 +3,3 @@
 #include <math.h>
+#include <time.h>
 
@@ -28,2 +29,3 @@
 #define STATE_MENU              5
+#define STATE_REPLAY            6
 
@@ -129,2 +131,3 @@ SFCave :: SFCave( int spd, QWidget *w, char *name )
 {
+    replayIt = 0;
 #ifdef QWS
@@ -166,4 +169,6 @@ SFCave :: SFCave( int spd, QWidget *w, char *name )
 
-    setUp();
+//    setUp();
     crashLineLength = -1;
+    state = STATE_MENU;
+    prevState = STATE_MENU;
 
@@ -184,5 +189,17 @@ void SFCave :: start()
 
+void SFCave :: setSeed( int seed )
+{
+    if ( seed == -1 )
+        currentSeed = ((unsigned long) time((time_t *) NULL));
+    else
+        currentSeed = seed;
+    PutSeed( currentSeed );
+}
+    
 int SFCave :: nextInt( int range )
 {
-    return rand() % range;
+    int val = (int)(Random( ) * range);
+
+    return val;
+    
 }
@@ -191,5 +208,2 @@ void SFCave :: setUp()
 {
-    state = STATE_MENU;
-    prevState = STATE_MENU;
-
     score = 0;
@@ -223,2 +237,3 @@ void SFCave :: setUp()
     crashLineLength = 0;
+    lastGateBottomY = 0;
 
@@ -256,2 +271,3 @@ void SFCave :: setUp()
         blocks[i].setY( -1 );
+
 }
@@ -266,2 +282,3 @@ void SFCave :: run()
         case STATE_NEWGAME:
+            setSeed( -1 );
             setUp();
@@ -269,3 +286,14 @@ void SFCave :: run()
             state = STATE_RUNNING;
+            replay = false;
+            replayList.clear();
             break;
+        case STATE_REPLAY:
+            setSeed( currentSeed );
+            setUp();
+            draw();
+            state = STATE_RUNNING;
+            replay = true;
+            if ( replayIt )
+                delete replayIt;
+            replayIt = new QListIterator<int>( replayList );
         case STATE_BOSS:
@@ -286,2 +314,12 @@ void SFCave :: run()
             nrFrames ++;
+
+            if ( replay )
+            {
+                while( replayIt->current() && *(replayIt->current()) == nrFrames )
+                {
+                    press = !press;
+                    ++(*replayIt);
+                }
+            }
+            
             if ( CURRENT_GAME_TYPE == SFCAVE_GAME )
@@ -525,5 +563,5 @@ void SFCave :: addGate()
             // See if height between last gate and this one is too big
-            if ( b1Height - 200 > lastGateBottomY )
+            if ( b1Height - 100 > lastGateBottomY )
                 b1Height -= 25;
-            else if ( b1Height + 200 < lastGateBottomY )
+            else if ( b1Height + 100 < lastGateBottomY )
                 b1Height += 25;
@@ -531,2 +569,3 @@ void SFCave :: addGate()
 
+
             int x2 = sWidth;
@@ -775,3 +814,7 @@ void SFCave :: keyPressEvent( QKeyEvent *e )
             case Qt::Key_Space:
-                press = true;
+                if ( !press )
+                {
+                    press = true;
+                    replayList.append( new int( nrFrames ) );
+                }
                 break;
@@ -806,18 +849,22 @@ void SFCave :: keyReleaseEvent( QKeyEvent *e )
             case Qt::Key_Space:
-                press = false;
+            case Qt::Key_Up:
+                if ( press )
+                {
+                    press = false;
+
+                    replayList.append( new int( nrFrames ) );
+                }
                 break;
 
-            case Qt::Key_Up:
-                press = false;
-                
             case Qt::Key_R:
-            case Qt::Key_Down:
                 if ( state == STATE_CRASHED )
                 {
-                    state = STATE_NEWGAME;
+                    state = STATE_REPLAY;
                 }
-                else
-                    movel = true;
                 break;
 
+            case Qt::Key_Down:
+                if ( state == STATE_CRASHED )
+                    state = STATE_NEWGAME;
+                break;
            default:
diff --git a/noncore/games/sfcave/sfcave.h b/noncore/games/sfcave/sfcave.h
index 69a0e13..0d9a626 100644
--- a/noncore/games/sfcave/sfcave.h
+++ b/noncore/games/sfcave/sfcave.h
@@ -6,4 +6,5 @@
 #include <qtimer.h>
+#include <qlist.h>
 
-
+#include "random.h"
 
@@ -13,2 +14,4 @@
 
+
+
 class SFCave : public QMainWindow
@@ -22,2 +25,8 @@ public:
 
+    int currentSeed;
+
+    QList<int> replayList;
+    QListIterator<int> *replayIt;
+    bool replay;
+
         int blockWidth;
@@ -81,2 +90,3 @@ public:
         void start();
+    void setSeed( int seed );
         int nextInt( int range );
diff --git a/noncore/games/sfcave/sfcave.pro b/noncore/games/sfcave/sfcave.pro
index f4b9e5d..5f49330 100644
--- a/noncore/games/sfcave/sfcave.pro
+++ b/noncore/games/sfcave/sfcave.pro
@@ -3,4 +3,4 @@ CONFIG		+= qt warn_on release
         DESTDIR         = $(OPIEDIR)/bin
-        SOURCES = sfcave.cpp helpwindow.cpp
-        HEADERS = sfcave.h helpwindow.h
+        SOURCES = sfcave.cpp helpwindow.cpp random.cpp
+        HEADERS = sfcave.h helpwindow.h random.h
         TARGET  = sfcave