Question

我正在使用ThirdPersonController作为播放器，我也试过了一个立方体。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using System.IO;

public class DirsFinder : MonoBehaviour
{
    enum Directions
    {
        Forward,Backward,Left,Right
    }

    public Transform player;

    private Transform start;
    private Transform end;
    private GridGenerator gridgenerator;
    public List<Vector3> possibleDirections = new List<Vector3>();
    private Vector3 direction;
    private float m_distanceTraveled = 0f;

    public void Find()
    {
        gridgenerator = GetComponent<GridGenerator>();
        GenerateStartEnd();
        FindDirections();
        m_distanceTraveled = 0;
    }

    private void FindDirections()
    {
        possibleDirections = new List<Vector3>();
        Vector3 playerPosition;
        playerPosition = player.localPosition;

        if (playerPosition.x > 0)
        {
            // can go left
            possibleDirections.Add(Vector3.left);
        }

        if (playerPosition.x + 1.5f < gridgenerator.gridWidth * 1.5f)
        {
            // can go right
            possibleDirections.Add(Vector3.right);
        }

        if (playerPosition.z > 0)
        {
            // can go backward
            possibleDirections.Add(Vector3.back);
        }


        if (playerPosition.z + 1.5f < gridgenerator.gridHeight * 1.5f)
        {
            // can go forward
            possibleDirections.Add(Vector3.forward);
            print("I'm moving forward !!!!!");
        }

        direction = possibleDirections[Random.Range(0, possibleDirections.Count - 1)];

        if (player.position == start.position)
            player.forward = direction;
    }

    private void Update()
    {
        if (m_distanceTraveled < 1.5f)
        {
            Vector3 oldPosition = player.position;
            player.position += direction * Time.deltaTime * 1f;
            m_distanceTraveled += Vector3.Distance(oldPosition, player.position);
        }
    }

    private List<Vector3> GenerateStartEnd()
    {
        GameObject walls = GameObject.Find("Walls");
        List<Transform> wallsParents = new List<Transform>();
        List<Vector3> startEndPos = new List<Vector3>();

        foreach (Transform child in walls.transform)
        {
            wallsParents.Add(child);
        }

        for (int i = 0; i < 2; i++)
        {
            wallsParents.Remove(wallsParents[Random.Range(0, wallsParents.Count)]);
        }

        var childsWall0 = wallsParents[0].GetComponentsInChildren<Transform>().ToList();
        var childsWall1 = wallsParents[1].GetComponentsInChildren<Transform>().ToList();
        childsWall0.RemoveAt(0);
        childsWall1.RemoveAt(0);

        start = childsWall0[Random.Range(0, childsWall0.Count)];
        player.position = start.position;
        end = childsWall1[Random.Range(0, childsWall1.Count)];
        end.tag = "End";
        startEndPos.Add(start.position);
        startEndPos.Add(end.position);

        start.GetComponent<Renderer>().material.color = Color.red;
        end.GetComponent<Renderer>().material.color = Color.blue;

        return startEndPos;
    }
}

在FindDirections底部，我让玩家面向选定的方向：

if (player.position == start.position)
    player.forward = direction;

然后在更新中，我将球员移动1.5度距离所选方向。

它在3个方向上正常工作：左，右，后退

但是当它选择前进方向时，我看到玩家正在向右移动。我尝试了很多次，它从未在网格上前进。

我无法弄清楚为什么它没有前进它有时会选择前进方向，但它并没有让玩家在网格上前进。

在截图中，它是一个网格的例子，蓝色圆圈是玩家，红色箭头是玩家正在移动的东西，黑色箭头应该是向前但是它永远不会移动那个方向。当它向前移动时它向右移动但从未向黑箭头方向移动，因为前进应该是：

Answer 1

问题：Random.Range行：

direction = possibleDirections[Random.Range(0, possibleDirections.Count - 1)];

解决方案：删除-1

direction = possibleDirections[Random.Range(0, possibleDirections.Count];

即使选择前进方向，为什么玩家永远不会前进？

1 个答案: