topical media & game development

topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _
game-javascript-math-ucla-fibonim.htm / htm

  <html><head><title>fibonim.html</title>                                                           
  
  <script language="JavaScript">
  <!-- hide this script tag's contents from old browsers
  
  function init() {
          x=26;
          lim=x-1;
  }
  
  function newgame(form) {
          x=28+5*Math.floor(Math.random()*5);
          lim=x-1;
          junk1 = "There are "+x+" counters in the pile.\r";
          junk2="You may remove up to "+lim+" counters.\r";
          form.space.value=junk1+junk2;
          form.result.focus();
  }
  
  function fibo(x) {  //Largest Fibonacci number <= x.
          var a=0;
          var b=1;
          var temp;
          while (a+b<=x) {
                  temp=b;
                  b=a+b;
                  a=temp;
          }
          return b
  }
  
  function remove(x,lim) {
          var n,remo;
          if (x<=lim) {
                  remo=x
          } else {
                  var y=x;
                  while (true) {
                          n=y-fibo(y);
                          if (n==0) {
                                  if (y<=lim) {
                                          remo=y
                                  } else {
                                          remo=0
                                  }
                                  break
                          }
                          if ((n<=lim)&&(3*n<y)) {
                                  remo=n;
                                  break
                          }
                          y=n;
                  }
          }
          if (remo==0) {
                  if (x<5) {
                          remo=1
                  } else {
                          m=Math.min(lim,Math.floor((x-1)/3));
                          remo=m
                  }
          }
          return remo
  }
  
  function compute(form) {
          if (x==0) {
                  form.space.value="You win!"
          } else if (x==-1) {
                  form.space.value="I win!"
          } else {
                  Z=parseInt(form.result.value);
                  if (isNaN(Z)) {
                            alert("Type in an integer between 1 and "+lim)
                  } else if ((Z<1)||(Z>lim)) {
                          alert("You must remove between 1 and "+lim+" counters.")
                  } else {
                          x=x-Z;
                          if (x==0) {
                                  form.space.value="You win!"
                          } else {
                                  lim=2*Z;
                                  junk1="You removed "+Z+", leaving "+x+((x==1)?" counter":" counters")+" in the pile.\r"
                                  junk2="I may remove up to "+lim+" counters.\r";
                                  lim=remove(x,lim);
                                  junk3="I remove "+lim+((lim==1)?" counter.\r\r":" counters.\r\r")
                                  x=x-lim;
                                  if (x==0) {
                                          x=-1;
                                          form.space.value=junk1+junk2+junk3+"I win!"
                                  } else {
                                          lim=2*lim;
                                          junk4="Now there are "+x+" counters in the pile.\r"
                                          junk5="You may remove up to "+lim+" counters.";
                                          form.space.value = junk1+junk2+junk3+junk4+junk5;
                                          form.result.value="";
                                          form.result.focus();
                                          
                                  }
                          }
                  }
          }
  }
  // done hiding from old browsers -->
  </script><script charset="utf-8" id="injection_graph_func" src="fibonim_files/injection_graph_func.js"></script></head><body onload="init()" )="">
  <center>
  <hr size="5">
  <h1>Fibonacci Nim</h1>
  <i>JavaScript</i>
  <hr size="5">
  There is one pile of counters. The first player may remove<br>
  any positive number of counters, but not the whole pile.<br>
  Thereafter, each player may remove at most twice the number<br>
  of counters his opponent took on the previous move.<br>
  The player who removes the last counter wins.
  <p>
  You move first.<br>
  You can win from the initial position, but don't make any mistakes!</p><p>
  
  </p><form method="post" name="board">
  
  <textarea name="space" rows="7" cols="54" value="stuff">There are 26 counters in the pile.
  You may remove up to 25 counters.
  </textarea>
  
  <p>
   How many do you remove?
  <input name="result" size="10" type="text">
  <input value="Remove" onclick="compute(this.form)" type="button">
  </p><p>
  <input value="newgame" onclick="newgame(this.form)" type="button">
  
  </p></form></center>
  
  </body></html>
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _
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