Question

我有两个函数，一个是OnCollisionEnter2D，另一个是OnTriggerEnter2D。我需要将Collision2D转换为Collider2D，反之亦然：

//  c# script
void OnCollisionEnter2D(Collision2D collision) {
    foo(collision);
}

void OnTriggerEnter2D(Collider2D collider) {
    foo(collider);
}

void foo(Collision2D coll){
    //checking inside here
}

当然，这不会编译，因为我正在给foo对撞机，而对撞机不是Collision2D。 I have noticed that these two data types are almost the same。我不能投这两个。有人可以帮我转换或建议一个解决方法吗？

提前致谢!!

修改

这是我的支票代码......

int coins;

void Start(){
    coins = 0;
}

void foo(Collision2D coll){
    if(coll.gameObject.tag == "coin"){
        coins++;
    }
//this works for both Collision2D and Collider2D because both have the gameObject property

}

Answer 1

只需为foo()添加一个重载方法，如下所示：

//  c# script
void OnCollisionEnter2D(Collision2D collision) {
    foo(collision);
}

void OnTriggerEnter2D(Collider2D collider) {
    foo(collider);
}

void foo(Collision2D coll){
    //checking inside here
}


void foo(Collider2D coll){

}

Answer 2

您可以使用通用的方法

void OnCollisionEnter2D(Collision2D collision)
{
    foo<Collision2D>(collision);
}

void OnTriggerEnter2D(Collider2D collider)
{
    foo<Collider2D>(collider);
}


public void foo<T>(T c)
{
    GameObject g;

    if (typeof(T) == typeof(Collider2D))
    {
        Collider2D obj = (Collider2D)(object)c;
        g = obj.gameObject;
    }
    else {
        Collision2D obj = (Collision2D)(object)c;
        g = obj.gameObject;
    }

    Debug.Log(g.tag);

    if (g.tag == "coin")
    {

    }
}

Unity - 将Collider2D转换为Collision2D

2 个答案: