From 5200007d603aefeb313050699d3354bad03a9084 Mon Sep 17 00:00:00 2001
From: Koen van Gilst <koen@koenvangilst.nl>
Date: Mon, 29 Jan 2024 21:17:43 +0100
Subject: [PATCH] attempt to fix infinite loops

---
 index.html | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/index.html b/index.html
index 37672ab..31800af 100644
--- a/index.html
+++ b/index.html
@@ -208,6 +208,16 @@
       return { dx: dx, dy: dy };
     }
 
+    // clears squares directly adjacent to the ball
+    function clearAroundBall(x, y) {
+      let i = Math.floor(x / SQUARE_SIZE);
+      let j = Math.floor(y / SQUARE_SIZE);
+
+      if (i >= 0 && i < numSquaresX && j >= 0 && j < numSquaresY) {
+        squares[i][j] = DAY_COLOR;
+      }
+    }
+
     function draw() {
       ctx.clearRect(0, 0, canvas.width, canvas.height);
       drawSquares();
@@ -235,6 +245,12 @@
       x2 += dx2;
       y2 += dy2;
 
+      // Check for collision
+      if (Math.abs(x1 - x2) < SQUARE_SIZE && Math.abs(y1 - y2) < SQUARE_SIZE) {
+        clearAroundBall(x1, y1);
+        clearAroundBall(x2, y2);
+      }
+
       iteration++;
       if (iteration % 1_000 === 0) console.log("interation", iteration);