如何将类属性添加到列表？

Question

在MainClass中，我有：

public List<TransformData> matrices1 = new List<TransformData>();
public Vector3 scaleVector = 1f;

在TransformData类中，我有：

public class TransformData 
{
    public Vector3 position;
    public Quaternion rotation;
    public Vector3 scale;
}

回到MainClass，我想将TransformData中的信息添加到变量matrices1中。 您如何正确执行此操作？ 我有-

matrices1.Add(TransformData.(TransformData.position, TransformData.rotation, scaleVector));

那给我错误。 我看到了其他有关此的StackOverflow问题，但我无法正确解决

Answer 1

先生，您在这里：

TransformData td = new TransformData();
matrices1.add(td);

如果您想在清除时添加参数，则向您的TransformData类添加一个构造函数。

public class TransformData 
{
    public Vector3 position;
    public Quaternion rotation;
    public Vector3 scale;

    public TransformData(){}

    public TransformData(Vector3 pos, Quaternion  rot, Vector3  sc)
    {
      position = pos;
      rotation = rot;
      scale = sc;
    }
}

然后您就可以像您在代码中所做的那样进行操作。

matrices1.add(new Transformdata(somepos, somerotation, somevector));

Answer 2

您需要向保存数据的对象添加变量或引用：

TransformData myObj = new TransformData();
myObj.position = //populate it here
myObj.rotation = //populate it here
myObj.scale = //populate it here

然后将其添加到列表中：

matrices1.Add(myObj);

如果在其他地方已经创建了该对象，则只需添加保存它的变量。

您在Stack Overflow上看到的与所讨论的行类似的内容可能是：

matrices1.Add(new TransformData(){ 
     position = //something,
     rotation = //something,
     scale = //something
});

这将创建新对象并将其添加到列表中。

Answer 3

你应该给它一个构造函数

// In order to be able to actually save that list this class has to be
// Serializable!
// Another nice side effect is that from now you can also adjust the values
// from the Inspector of the MonoBehaviour using such an instance or list
[Serializable]
public class TransformData 
{
    public Vector3 position;
    public Quaternion rotation;
    public Vector3 scale;

    // Serialization always needs a default constructor 
    // doesn't have to do anything but can
    public TransformData() 
    {
        // scale should be 1,1,1 by default
        // The other two can keep their default values
        scale = Vector3.one;
    }

    public TransformData(Vector3 pos, Quaternion rot, Vector3 scal)
    {
        position = pos;
        rotation = rot;
        scale = scal;
    }
}

然后做例如

// this is a vector not a float!
public Vector3 scaleVector = Vector3.one;

private void Start()
{
    // I guess you wanted to add the data for some transform component
    matrices1.Add(new TransformData(transform.position, transform.rotation, Vector3.one));
}

请注意，不能在方法外部使用Add 。

---

如果您想直接添加一些元素来初始化列表，则可以像

public List<TransformData> matrices1 = new List<TransformData>()
{
    new TransformData(somePosition, someRotation, scaleVector);
};

如果 somePosition和someRotation也是例如您从Inspector获得的值。 您不能在方法外部使用transform.position等。