Unity3d将不同的脚本声明为“使用___”

Question

I am working on a project that requires underwater physics, and from my WaterController.cs script I need to get variables from the FirstPersonController.cs script. I was wondering if I could put it at the top with "using" like using FirstPersonController.cs or something along those lines. Could someone tell me if I could do this and in what way, or if there is another way of getting variables from that script?

Answer 1

The FirstPersonController.cs that comes with Unity3d's standard assets belongs to the UnityStandardAssets.Characters.FirstPerson namespace so you need

using UnityStandardAssets.Characters.FirstPerson;

at the top of any script that needs to use that class. Since you're trying to access one of its public member variables, you also need a reference to the instance of the FirstPersonController that you're working with.

In WaterController.cs , you'll need a reference to the GameObject that the FirstPersonController is attached to (lets call it FPobj ) and then you can get that component like this:

FPobj.GetComponent<FirstPersonController>(); // Returns null or the reference

If you're having trouble "getting a reference" to the GameObject that the FirstPersonController is attached to, try this:

Give WaterController a public variable to hold it:

public class WaterController : MonoBehaviour {
    public GameObject FPobj;
    private FirstPersonController FPC;

    void Start() {
        FPC = FPobj.GetComponent<FirstPersonController>();
    }
}

Now, when you click on the GameObject that has the WaterController attached, you will see a slot in Unity's Inspector for FPobj (becuase it's public ). You can drag your GameObject that has FirstPersonController attached from the Hierarchy into this slot and you should be good to go. Now, anywhere in your WaterController 's functionality, you can use FPC to get the variables you need. Since they're all private , you'll need to modify FirstPersonController.cs if you'd like to access them:

float GetYRotation() { return m_YRotation(); } // or whatever variable you want.

There are also other options for getting the reference without dragging into the Hierarchy . You can, for example, make use of GameObject.Find() or GameObject.FindGameObjectWithTag() . If you go this route, make sure you still do it in Start() only once and save the reference instead of calling it every time you need it... those two functions are pretty slow.