Update coordinate calculations in updateGrid function to account for window scrolling

Author: tombigel

assets/main.mjs

@@ -47,8 +47,8 @@ function updateGrid() {
     for (let line of lines) {
         const rect = line.getBoundingClientRect();
         lineCache.set(line, {
-            x: rect.left + rect.width / 2,
-            y: rect.top + rect.height / 2
+            x: rect.left + rect.width / 2 + window.scrollX,
+            y: rect.top + rect.height / 2 + window.scrollY
         });
     }
 }