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Project 27: Multiple Falling Objects

3D Engineer
Step 1 of 2
Project

Review: Physics Simulation

Simulate one falling, bouncing box with a velocity ref.

🎯 Your Task

Please add the exact code shown in the light gray box below to your editor.Do not delete your previous code, just insert these new lines in the correct place!

function FallingBox({ x }) {
  const ref = useRef();
  const velocity = useRef(0);
  useFrame((state, delta) => {
    velocity.current -= 9.8 * delta;
    ref.current.position.y += velocity.current * delta;
    if (ref.current.position.y < -1.5) {
      ref.current.position.y = -1.5;
      velocity.current *= -0.5;
    }
  });
  return (
    <mesh ref={ref} position={[x, 2, 0]}>
      <boxGeometry args={[0.6, 0.6, 0.6]} />
      <meshStandardMaterial color="orange" />
    </mesh>
  );
}

export default function Scene() {
  return (
    <Canvas>
      <ambientLight intensity={0.7} />
      <FallingBox x={-1} />
    </Canvas>
  );
}