unity俄罗斯方块游戏代码

以下是一个简单的 Unity 俄罗斯方块游戏的代码示例：

using UnityEngine;

public class TetrisBlock : MonoBehaviour
{
    private float fallSpeed = 1.0f;
    private float lastFall = 0;

    void Start()
    {
        if (!IsValidGridPos())
        {
            Debug.Log("Game Over");
            Destroy(gameObject);
        }
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.LeftArrow))
        {
            transform.position += new Vector3(-1, 0, 0);

            if (IsValidGridPos())
                UpdateGrid();
            else
                transform.position += new Vector3(1, 0, 0);
        }
        else if (Input.GetKeyDown(KeyCode.RightArrow))
        {
            transform.position += new Vector3(1, 0, 0);

            if (IsValidGridPos())
                UpdateGrid();
            else
                transform.position += new Vector3(-1, 0, 0);
        }
        else if (Input.GetKeyDown(KeyCode.UpArrow))
        {
            transform.Rotate(0, 0, -90);

            if (IsValidGridPos())
                UpdateGrid();
            else
                transform.Rotate(0, 0, 90);
        }

        if (Time.time - lastFall >= fallSpeed)
        {
            transform.position += new Vector3(0, -1, 0);

            if (IsValidGridPos())
            {
                UpdateGrid();
            }
            else
            {
                transform.position += new Vector3(0, 1, 0);

                Grid.DeleteFullRows();

                FindObjectOfType<Spawner>().SpawnNext();

                enabled = false;
            }

            lastFall = Time.time;
        }
    }

    bool IsValidGridPos()
    {
        foreach (Transform child in transform)
        {
            Vector2 v = Grid.RoundVec2(child.position);

            if (!Grid.InsideBorder(v))
                return false;

            if (Grid.grid[(int)v.x, (int)v.y] != null &&
                Grid.grid[(int)v.x, (int)v.y].parent != transform)
                return false;
        }

        return true;
    }

    void UpdateGrid()
    {
        for (int y = 0; y < Grid.h; ++y)
            for (int x = 0; x < Grid.w; ++x)
                if (Grid.grid[x, y] != null)
                    if (Grid.grid[x, y].parent == transform)
                        Grid.grid[x, y] = null;

        foreach (Transform child in transform)
        {
            Vector2 v = Grid.RoundVec2(child.position);
            Grid.grid[(int)v.x, (int)v.y] = child;
        }
    }
}

这个示例使用了一个 `Grid` 类，该类包含了一个二维数组来表示游戏区域的状态。`Spawner` 类用于生成下一个方块。这个示例中只包含了一个方块的移动和旋转逻辑，但你可以根据自己的需求来扩展它。