Unity：网格实例化与偏移

Question

我有一个奇怪的错误，我不明白它为什么会发生，也许有人可以提供帮助。

我正在制作一个蛇游戏，我正在做网格atm。 我根据游戏对象大小实例化网格，但是当网格实例化时存在偏移。它与我指定的游戏对象大小不同（黑框如下图所示）。

这是我的经理所在的网站

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

 public class GridManager : MonoBehaviour {

[SerializeField] private GridTile gridTilePrefab; 

[SerializeField] private Transform playArea;
[SerializeField] private int gridSize = 10;

public int GridSize { 
    get { return gridSize; } 
}

private Vector3 startPoint;

public Vector3 StartPoint { 
    get { return startPoint; } 
}


private int width;
private int height;

private Transform[,] grid;

public void InitializeGrid()
{

    // Grid Size
    width = Mathf.RoundToInt (playArea.localScale.x * gridSize);
    height = Mathf.RoundToInt (playArea.transform.localScale.y * gridSize);

    grid = new Transform[width,height];

    // get the left bottom as start point
    startPoint = playArea.GetComponent<Renderer>().bounds.min;

    CreateGridTiles ();

}

private void CreateGridTiles()
{
    if (gridTilePrefab == null)
        return;


    for (int y = 0; y < height; y++) {

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

            // Get world pos of grid location
            Vector3 worldPos = GetWorldPos(x,y);
            GridTile gridTile;
            gridTile = Instantiate (gridTilePrefab, worldPos , Quaternion.identity);
            gridTile.name = string.Format ("Tile({0},{1})" , x , y );

            grid [x, y] = gridTile.transform; 

        }

    }


}


private Vector3 GetWorldPos (int x, int y)
{
    float xf = x;
    float yf = y;

    return new Vector3 (startPoint.x + (xf / gridSize) ,startPoint.y + (yf / gridSize) ,startPoint.z);

}

// Use this for initialization
void Start () {
    InitializeGrid ();
}


}

Answer 1

错误不是代码，而是使用了瓷砖的精灵。我改变了它从中心到左下方的枢轴。因为在代码中我的startPoint = playArea.GetComponent<Renderer>().bounds.min; 所以它会占据对象的左下角。