CAD

src/pages/faq/erstellung-energieausweise/index.astro

@@ -169,11 +169,22 @@ import Layout from "#layouts/layoutCAD.astro";
       const endX = snapToGrid(e.offsetX);
       const endY = snapToGrid(e.offsetY);
 
-      // Draw a point if the start and end are the same
+      // Check if the end point is valid:
+      // - Must not be the same as the start point
+      // - Must be a valid grid point or the start point of the first line
+      const isValidEndPoint =
+        (endX !== startX || endY !== startY) &&
+        ((endX === firstStartPoint?.x && endY === firstStartPoint?.y) || true);
+
+      if (!isValidEndPoint) {
+        return;
+      }
+
+      // If it's a point, draw a point
       if (startX === endX && startY === endY) {
         drawPoint(startX, startY);
       } else {
-        // Draw the line
+        // Otherwise, draw the line
         drawLine(startX, startY, endX, endY);
       }