Physics物理引擎 about jump HOT 7 OPEN

void Start()
    {
        this.rigid2D = GetComponent<Rigidbody2D>();
    }

    void Update()
    {
        // 跳躍
        if (Input.GetKeyDown(KeyCode.Space))
        {
            this.rigid2D.AddForce(transform.up * this.jumpForce);
        }

        // 左右移動
        int key = 0;
        if (Input.GetKey(KeyCode.RightArrow)) key = 1;
        if (Input.GetKey(KeyCode.LeftArrow)) key = -1;

        // 遊戲角色的速度
        float speedx = Mathf.Abs(this.rigid2D.velocity.x);

        // 速度限制
        if (speedx < this.maxWalkSpeed)
        {
            this.rigid2D.AddForce(transform.right * key * this.walkForce);
        }

        // 依照行進方向翻轉
        if(key != 0) {
            transform.localScale = new Vector3(key, 1, 1);
        }
    }

private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.CompareTag("Player"))
        {
            cam.minPosition += cameraChange;
            cam.maxPosition += cameraChange;
            other.transform.position += playerChange;
            if(needText)
            {
                StartCoroutine(placeNameCo());
            }

        }
    }