-3 = 230 bytes: simplify direction change

aemkei · aemkei · commit a742cbe2cfef · 2015-07-19T18:26:14.000+02:00
diff --git a/README.md b/README.md
@@ -8,17 +8,18 @@ A super minimalistic clone of the classic Pong game in < 256 bytes of HTML and J
 
 Use your keyboard to control the paddle movement.
 
-### Source (233 bytes)
+### Source (230 bytes)
 
 ```html
-<body onload=k=13,x=W=27,X=Y=
-1,setInterval('for(i=h="",k=k
-<0?0:24<k?24:k,X*=x%W?1:-1,Y*
-=x<0?-1:297<x?(Q=x-299-k)*Q<4
-?-1:p:1,x+=Y*(W+X*Y);i++<297+
-k;p.innerHTML=h+888)h+=i%W?i^
-x?" ":0:"|\\n"',99) onkeydown
-=k+=event.which-38><pre id=p>
+<body onload=k=13,x=W=27,X=
+Y=1,setInterval('for(i=h=""
+,k=k<0?0:24<k?24:k,X=x%W?X:
+-X,Y=x<0?1:297<x?(Q=x-299-k
+)*Q<4?-1:p:Y,x+=Y*(W+X*Y);i
+++<297+k;p.innerHTML=h+888)
+h+=i%W?i^x?" ":0:"|\\n"',99
+) onkeydown=k+=event.which-
+38><pre id=p>
 ```
 
 ### Gameplay Video
diff --git a/annotated.js b/annotated.js
@@ -14,19 +14,19 @@ setInterval(function() {
     	24 < k ? 24 :
     	k,
 
-    X *= x % W ?                // reflect if ball hits wall
-    	1 :
-    	-1,
+    X = x % W ?                // reflect if ball hits wall
+    	X :
+    	-X,
 
-    Y *=                        // change Y direction
-      x < 0 ? -1 :              // reflect if ball hit top border
+    Y =                         // change Y direction
+      x < 0 ? 1 :               // reflect if ball hit top border
         297 < x ? (             // if ball hits bottom border ...
           (
           	Q = x - 299 - k     // calculate distance to paddle center
           ) * Q < 4 ?           // if distance^2 is less than four
             -1 :                // ... reflect up
             p                   // otherwise break the game
-      ) : 1,
+      ) : Y,
 
     x += Y * (W + X * Y);       // update ball position based on direction
 
diff --git a/index.html b/index.html
@@ -1 +1 @@
-<body onload=k=13,x=W=27,X=Y=1,setInterval('for(i=h="",k=k<0?0:24<k?24:k,X*=x%W?1:-1,Y*=x<0?-1:297<x?(Q=x-299-k)*Q<4?-1:p:1,x+=Y*(W+X*Y);i++<297+k;p.innerHTML=h+888)h+=i%W?i^x?" ":0:"|\\n"',99) onkeydown=k+=event.which-38><pre id=p>
+<body onload=k=13,x=W=27,X=Y=1,setInterval('for(i=h="",k=k<0?0:24<k?24:k,X=x%W?X:-X,Y=x<0?1:297<x?(Q=x-299-k)*Q<4?-1:p:Y,x+=Y*(W+X*Y);i++<297+k;p.innerHTML=h+888)h+=i%W?i^x?" ":0:"|\\n"',99) onkeydown=k+=event.which-38><pre id=p>
diff --git a/min.js b/min.js

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-<body onload=k=13,x=W=27,X=Y=1,setInterval('for(i=h="",k=k<0?0:24<k?24:k,X=x%W?1:-1,Y=x<0?-1:297<x?(Q=x-299-k)Q<4?-1:p:1,x+=Y(W+X*Y);i++<297+k;p.innerHTML=h+888)h+=i%W?i^x?" ":0:"\|\\n"',99) onkeydown=k+=event.which-38><pre id=p>`
	`1`	`+<body onload=k=13,x=W=27,X=Y=1,setInterval('for(i=h="",k=k<0?0:24<k?24:k,X=x%W?X:-X,Y=x<0?1:297<x?(Q=x-299-k)Q<4?-1:p:Y,x+=Y(W+X*Y);i++<297+k;p.innerHTML=h+888)h+=i%W?i^x?" ":0:"\|\\n"',99) onkeydown=k+=event.which-38><pre id=p>`