如何在Unity C＃脚本中解决错误“ CS0029”？

Question

我试图在我的世界副本中制作一个脚本，但它不断返回此错误：

Assets/Materials/minecraft_assets/WorldGeneration.cs(79,41): error CS0029: Cannot implicitly convert type UnityEngine.GameObject to UnityEngine.Vector3

这是我脚本中所有的代码（而且我知道代码很烂）：

using UnityEngine;
using System.Collections;

public class Block
{
    public int type;
    public bool vis;

    public Block(int t, bool v)
    {
        type = t;
        vis = v;
    }
}

public class WorldGeneration : MonoBehaviour {

    public static int width = 128;
    public static int depth = 128;
    public static int height = 128;

    public int heightScale = 20;
    public float detailScale = 25.0f;

    public GameObject grassBlock;
    public GameObject sandBlock;
    public GameObject snowBlock;

    Block[,,] worldBlocks = new Block[width, height, depth];

    // Use this for initialization
    void Start ()
{
    int seed = (int) Network.time * 10;
    for (int z = 0; z <= depth; z++) {

        for (int x = 0; x <= width; x++) {

            int y = (int) (Mathf.PerlinNoise((x+seed)/detailScale, (z+seed)/detailScale) * heightScale);
            Vector3 blockPos = new Vector3 (x, y, z);

            CreateBlock (y, blockPos, true);
            while (y > 0) {
                y--;
                blockPos = new Vector3 (x, y, z);
                CreateBlock(y, blockPos, false);    
            }
        }
    }
}

    // Use this for creating blocks
void CreateBlock(int y, Vector3 blockPos, bool create)
{
    if (y > 15) {
        if (create)
            Instantiate (snowBlock, blockPos, Quaternion.identity);
        worldBlocks [(int)blockPos.x, (int)blockPos.y,(int) (blockPos.z)] = new Block (1, create);
    } 
    else if (y > 5) {
        if (create)
            Instantiate (grassBlock, blockPos, Quaternion.identity);
        worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z] = new Block (2, create);
    } 
    else {
        if (create)
            Instantiate (sandBlock, blockPos, Quaternion.identity);
        worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z] = new Block (3, create);
    }
}

    // Update is called once per frame
void Update ()
{
    if (Input.GetMouseButtonDown (0)) {
        RaycastHit hit;
        Ray ray = Camera.main.ScreenPointToRay (new Vector3 (Screen.width / 2.0f, Screen.height / 2.0f, 0));
        if (Physics.Raycast (ray, out hit, 1000.0f)) {

            Vector3 blockPos = hit.transform.gameObject.;

            //This is the bottom block. Don't delete it
            if((int)blockPos.y == 0) return;

            worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z] = null;

            Destroy (hit.transform.gameObject);


            for (int x = -1; x <= 1; x++)
                for (int y = -1; y <= 1; y++)
                    for (int z = -1; z <= 1; z++) {
                        if (!(x == 0 && y == 0 && z == 0)) {
                            Vector3 neighbor = new Vector3 (blockPos.x + x, blockPos.y + y, blockPos.z + z);
                            DrawBlock (neighbor);
                        }
                    }
        }
    }

        // Use this for returing values
void DrawBlock(Vector3 blockPos)
{
    if (worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z] == null)
        return;

    if (!worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].vis) {

        worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].vis = true;
        if (worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].type == 1)
            Instantiate (snowBlock, blockPos, Quaternion.identity);
    } else if (worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].type == 2)
        Instantiate (grassBlock, blockPos, Quaternion.identity);
    else if (worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].type == 3)
        Instantiate (sandBlock, blockPos, Quaternion.identity);
    else
        worldBlocks [(int)blockPos.x, (int)blockPos.y, (int)blockPos.z].vis = false;
}

/* End Of Script*/

我尝试通过将blockPos更改为gameObject来调试它，如下所示：

Vector3 blockPos = (gameObject) hit.transform.gameObject;

但是它返回了1000条错误消息！

有什么办法可以帮助任何人吗？

我在我的HP Pavilion TouchSmart 14 Sleekbook和MonoDevelop 2.0上使用Unity 5.4.2f2。

Answer 1

根据Unity3D文档， GameObject继承自System.Object 。 另外，根据文档，在GameObject或Vector3上没有隐式的GameObject运算符重载，因此可以简单地解决此问题：

GameObject不是Vector3 ，并且不能明确地强制转换为一个。

有关您的问题的解决方案，请参阅Fredrik的答案。 他似乎对Unity3D有所了解，而不仅仅是像我这样的.NET;）。

Answer 2

就像异常所说的那样，您的代码中有一个错误。 您正在尝试将GameObject保存在Vector3中。

第79行：

 Vector3 blockPos = hit.transform.gameObject.;

这不是工作代码。 你要：

Vector3 blockPos = hit.transform.position;