如何修复我的 Unity C# 脚本中的错误 "CS0029"？

Question

我试图在我的 minecraft 克隆中制作脚本，但它一直返回此错误：

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

这是我脚本中的所有代码（我知道代码很乱）：

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;

但它返回了 1000 条错误消息！

有什么想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。此外，根据文档，GameObject 或 Vector3 上没有隐式转换运算符重载，将此问题留给一个简单的答案：

A GameObject 不是 Vector3，不能明确地转换为一个。

有关您的问题的解决方案，请参阅 Fredrik 的回答。他似乎对 Unity3D 有所了解，而不仅仅是像我一样了解 .NET ;)。

Answer 2

如异常所述，您的代码有错误。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。你想要：

Vector3 blockPos = hit.transform.position;

如何修复我的 Unity C# 脚本中的错误 "CS0029"？

How can I fix the error "CS0029" in my Unity C# script?

c#

unity3d

unity5