Update script.js

script.js

@@ -35,10 +35,12 @@ document.addEventListener('click', (event) => {
         World.remove(world, ball);
         plotGraphs();
     }
+
     const x = event.clientX;
     const y = event.clientY;
-    const velocityX = Math.random() * 10 - 5;  // -5から5のランダムな速度
-    const velocityY = Math.random() * 10 - 5;
+    const velocityX = parseFloat(document.getElementById('vx').value);  // ユーザー入力の初速度X
+    const velocityY = parseFloat(document.getElementById('vy').value);  // ユーザー入力の初速度Y
+
     ball = Bodies.circle(x, y, 20, { restitution: 0.8 });
     Matter.Body.setVelocity(ball, { x: velocityX, y: velocityY });
     World.add(world, ball);