Question

我创建了一个简单的拖动脚本。这将是我游戏的主要输入，以及我将如何控制玩家。脚本如下所示：

public void OnMouseDown() {
    offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint (new Vector3 (Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));

    if (gameController.GetCurrentState () != GameStates.INGAME){
        gameController.StartGame();
    }
}

public void OnMouseDrag() {
    if (gameController.GetCurrentState () == GameStates.INGAME) {
        Vector3 curScreenPoint = new Vector3 (Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
        Vector3 curPosition = Camera.main.ScreenToWorldPoint (curScreenPoint) + offset;
        transform.position = curPosition;
    }
}

此脚本已附加到我的播放器。附在我的播放器上的还有RigidBody 2D和Circle Collider 2D。我已经创建了一些墙壁，在游戏开始时，我使用mainCam.ScreenToWorldPoint将其重新定位在摄像机外部。这完成了：

var mainCam : Camera;

var topWall : BoxCollider2D;
var bottomWall : BoxCollider2D;
var leftWall : BoxCollider2D;
var rightWall : BoxCollider2D;

//Reference the players

function Start () {

    //Move each wall to its edge location:
    topWall.size = new Vector2 (mainCam.ScreenToWorldPoint (new Vector3 (Screen.width * 2f, 0f, 0f)).x, 1f);
    topWall.center = new Vector2 (0f, mainCam.ScreenToWorldPoint (new Vector3 ( 0f, Screen.height, 0f)).y + 0.5f);

    bottomWall.size = new Vector2 (mainCam.ScreenToWorldPoint (new Vector3 (Screen.width * 2, 0f, 0f)).x, 1f);
    bottomWall.center = new Vector2 (0f, mainCam.ScreenToWorldPoint (new Vector3( 0f, 0f, 0f)).y - 0.5f);

    leftWall.size = new Vector2(1f, mainCam.ScreenToWorldPoint(new Vector3(0f, Screen.height*2f, 0f)).y);;
    leftWall.center = new Vector2(mainCam.ScreenToWorldPoint(new Vector3(0f, 0f, 0f)).x - 0.5f, 0f);

    rightWall.size = new Vector2(1f, mainCam.ScreenToWorldPoint(new Vector3(0f, Screen.height*2f, 0f)).y);
    rightWall.center = new Vector2(mainCam.ScreenToWorldPoint(new Vector3(Screen.width, 0f, 0f)).x + 0.5f, 0f);
}

与玩家一样，这面墙也附有RigidBody 2D和Box Collider 2D。我的问题是我无法发现任何类型的碰撞。甚至当我把球拖到墙上时也是如此。我打算用这个脚本检测是否在拖动时触摸了墙壁。通过这样做，我将能够调用我的游戏状态＆＃34; GameOver＆＃34;并结束游戏。

任何关于为什么的想法，我都无法检测到这种碰撞？我确信墙壁处于正确位置，球确实碰到了墙壁。

Answer 1

您是否只是在询问如何检测碰撞？确保所有对象（墙和播放器对象）都有Collider2D组件。在这些碰撞者上，将 IsTrigger 设置为 true 。然后在你的播放器控制器中：

void OnTriggerEnter2D(Collider2D other) {
    // check if "other" is a wall
    if (other.transform.GetComponent<Wall>()) 
        this.gameState = GameStates.GAMEOVER;
}

请注意，至少有一个可碰撞的GameObject需要一个RigidBody2D。只需在所有东西上放置一个RigidBody2D，就不要使用重力。

Answer 2

你没有写过如何制作screenPoint，所以这里只是如此

public void OnMouseDown() {
    screenPoint = Camera.main.WorldToScreenPoint(gameObject.transform.position);

如何在使用GameObject时检测碰撞，同时在Unity 3D上拖动时会与BoxCollider 2D发生碰撞

2 个答案: