iznax · March 7, 2012 06:54 · iznax · Mar 7, 2012
diff --git a/README.md b/README.md
diff --git a/annotated.js b/annotated.js
 var Update=function(g,i)
 {
  // For each line in the game board.
  for (i=H; --i;)
      // If time cycle is 1/4 or line is below middle sidewalk.
      if (!(t%4) | i>5)
      //{
        // Read the current bits for log/car traffic
        g=r[i],
        // Shift (odd) rows left with wrap-around
        // Shift (even) rows right with wrap-around
        r[i] = i&1?(g&1)<<V|g>>1:g>>V&1|g<<1;
      //}
  // If player has not reach (0,1,2,3) end of death animation advance timer.
  // otherwise reset the player to the bottom middle of the screen.
  p<3?t++:(p=0,x=M,y=B);
  // Advance the player animation if already dead or newly hit by traffic.
  p+=p?1:r[y]>>x&1;
 }
diff --git a/index.js b/index.js
 function(g,i){for(i=H;--i;)if(!(t%4)|i>5)g=r[i],r[i]=i&1?(g&1)<<V|g>>1:g>>V&1|g<<1;p<3?t++:(p=0,x=M,y=B);p+=p?1:r[y]>>x&1}
diff --git a/License.txt b/License.txt
 The "WTH" Public License

 Copyright (C) 2012 Paul Isaac

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

 #. You can do whatever-the-heck you like with this code.
diff --git a/package.json b/package.json
 {
  "name": "MiniFrogger",

  "description": "Mini version of Frogger game in less than 140 bytes",

  "keywords": [
    "game",
    "javascript",
    "frogger",
    "arcade"
  ]
 }
diff --git a/test.html b/test.html
 <html>
 <style>body{ font-family: monospace; font-size: 20px}</style>
 <div id="out"></div>
 </html>

 <script>

 var W=16,R=W-1,M=W/2;
 var H=12,B=H-1;
 var V=18;       // View size bits to wrap-around?
 var Z = 0x6666; // Top line pattern
 var x=M,y=B;    // Player position x,y
 var p=0;        // Player animation
 var t=0;        // Time counter

 // Water logs and car traffic
 var r=[0,0x0e38f,0x38f3c,0x383e0,0x39e3c,0,85,1048,31+(63<<9),85<<8,2048|9,0];

 function Input(k)
 {
   // Ignore key if player is dead.
   k *= !p;
   // Move left/right?
   x -= k==37 & x>0;
   x += k==39 & x<R;
   // Move up/down?
   y -= k==38 & ((y==1&Z>>x) | y>1);
   y += k==40 & y<B;
   // Check if you hop into danger?
   p+=r[y]>>x&!p;
 }

 var Update=function(g,i)
 {
  for (i=H; --i;)
      if (!(t%4) | i>5)
      //{
        g=r[i],
        r[i] = i&1?(g&1)<<V|g>>1:g>>V&1|g<<1;
      //}
  p<3?t++:(p=0,x=M,y=B);
  p+=p?1:r[y]>>x&1;
 }

 function Draw()
 {
  var view = "";
  for (var j=0; j<H; j++)
  {
    for (var i=0; i<W; i++)
      view += "#O~=:.#@X%%"[i==x&j==y?p+7:
        y?j?2+(j<5?!(r[j]&1<<i):2+!!r[j]+(j>5?(r[j]&1<<i)>0:0)):Z>>i&1:1];
    view += "<br>";
  }
  document.getElementById('out').innerHTML = view;
 }

 // IE requires implicit 'event' parameter?
 document.onkeydown = function()
 {
    Input(event.keyCode);
    Draw();
 }

 function Main()
 {
  Update(0,0);
  Draw();
  setTimeout(Main, 300);
 }

 Main();

 </script>
	var Update=function(g,i)
	{
	// For each line in the game board.
	for (i=H; --i;)
	// If time cycle is 1/4 or line is below middle sidewalk.
	if (!(t%4) \| i>5)
	//{
	// Read the current bits for log/car traffic
	g=r[i],
	// Shift (odd) rows left with wrap-around
	// Shift (even) rows right with wrap-around
	r[i] = i&1?(g&1)<<V\|g>>1:g>>V&1\|g<<1;
	//}
	// If player has not reach (0,1,2,3) end of death animation advance timer.
	// otherwise reset the player to the bottom middle of the screen.
	p<3?t++:(p=0,x=M,y=B);
	// Advance the player animation if already dead or newly hit by traffic.
	p+=p?1:r[y]>>x&1;
	}
	The "WTH" Public License

	Copyright (C) 2012 Paul Isaac

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	#. You can do whatever-the-heck you like with this code.
	{
	"name": "MiniFrogger",

	"description": "Mini version of Frogger game in less than 140 bytes",

	"keywords": [
	"game",
	"javascript",
	"frogger",
	"arcade"
	]
	}
	<html>
	<style>body{ font-family: monospace; font-size: 20px}</style>
	<div id="out"></div>
	</html>

	<script>

	var W=16,R=W-1,M=W/2;
	var H=12,B=H-1;
	var V=18; // View size bits to wrap-around?
	var Z = 0x6666; // Top line pattern
	var x=M,y=B; // Player position x,y
	var p=0; // Player animation
	var t=0; // Time counter

	// Water logs and car traffic
	var r=[0,0x0e38f,0x38f3c,0x383e0,0x39e3c,0,85,1048,31+(63<<9),85<<8,2048\|9,0];

	function Input(k)
	{
	// Ignore key if player is dead.
	k *= !p;
	// Move left/right?
	x -= k==37 & x>0;
	x += k==39 & x<R;
	// Move up/down?
	y -= k==38 & ((y==1&Z>>x) \| y>1);
	y += k==40 & y<B;
	// Check if you hop into danger?
	p+=r[y]>>x&!p;
	}

	var Update=function(g,i)
	{
	for (i=H; --i;)
	if (!(t%4) \| i>5)
	//{
	g=r[i],
	r[i] = i&1?(g&1)<<V\|g>>1:g>>V&1\|g<<1;
	//}
	p<3?t++:(p=0,x=M,y=B);
	p+=p?1:r[y]>>x&1;
	}

	function Draw()
	{
	var view = "";
	for (var j=0; j<H; j++)
	{
	for (var i=0; i<W; i++)
	view += "#O~=:.#@X%%"[i==x&j==y?p+7:
	y?j?2+(j<5?!(r[j]&1<<i):2+!!r[j]+(j>5?(r[j]&1<<i)>0:0)):Z>>i&1:1];
	view += "<br>";
	}
	document.getElementById('out').innerHTML = view;
	}

	// IE requires implicit 'event' parameter?
	document.onkeydown = function()
	{
	Input(event.keyCode);
	Draw();
	}

	function Main()
	{
	Update(0,0);
	Draw();
	setTimeout(Main, 300);
	}

	Main();

	</script>