From dd66ed184806de1f9af93f4ece40ac87255ff1b8 Mon Sep 17 00:00:00 2001
From: LSvekis <lassvekis@gmail.com>
Date: Fri, 2 Jul 2021 13:14:48 -0400
Subject: [PATCH] Update bouncing ball

---
 Chapter 13/bouncing ball | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/Chapter 13/bouncing ball b/Chapter 13/bouncing ball
index c3b82d3..546f857 100644
--- a/Chapter 13/bouncing ball	
+++ b/Chapter 13/bouncing ball	
@@ -18,8 +18,8 @@ const ctx = canvas.getContext("2d");
 const ballSize = 10;
 let x = canvas.width/2;
 let y = canvas.height/2;
-let dx = 1;
-let dy = 1;
+let dirX = 1;
+let dirY = 1;
 function drawBall() {
     ctx.beginPath();
     ctx.arc(x, y, ballSize, 0, Math.PI*2);
@@ -27,19 +27,19 @@ function drawBall() {
     ctx.fill();
     ctx.closePath();
 }
-function draw() {
+function move() {
     ctx.clearRect(0, 0, canvas.width, canvas.height);
     drawBall();
-    if(x + dx > canvas.width-ballSize || x + dx < ballSize) {
-        dx *= -1;
+    if(x  > canvas.width-ballSize || x  < ballSize) {
+        dirX *= -1;
     }
-    if(y + dy > canvas.height-ballSize || y + dy < ballSize) {
-        dy *= -1;
+    if(y > canvas.height-ballSize || y < ballSize) {
+        dirY *= -1;
     }
-    x += dx;
-    y += dy;
+    x += dirX;
+    y += dirY;
 }
-setInterval(draw, 10);
+setInterval(move, 10);
     </script>
 </body>