AI 物体躲避墙的基本代码

Paste_Image.png

场景图

public class PlayerManage : MonoBehaviour
{

RaycastHit hitFoward, hitRight, hitLeft;
//射线长度，控制距离障碍物多远的时候开始触发躲避
float rayLength;
//碰到障碍物时的反向作用力
Vector3 reverseForce;
//物体自身的速度
public Vector3 velocitySelf;
//判断是否在进行转弯
bool IsTurn;
void Start()
{
    rayLength = 2;
}
void Update()
{
    Debug.DrawLine(transform.position, transform.position + transform.forward, Color.cyan);
    Debug.DrawLine(transform.position, transform.position + (transform.forward + transform.right).normalized, Color.cyan);
    Debug.DrawLine(transform.position, transform.position + (transform.forward - transform.right).normalized, Color.cyan);
    if (Physics.Raycast(transform.position, transform.forward, out hitFoward, rayLength))
    {
        //Raycast.normal表示光线射到此表面时，在此处的法线单位向量
        reverseForce = hitFoward.normal * (rayLength - (hitFoward.point - transform.position).magnitude);
        IsTurn = true;
    }
    if (Physics.Raycast(transform.position, transform.forward + transform.right, out hitFoward, rayLength))
    {
        reverseForce = hitFoward.normal * (rayLength - (hitFoward.point - transform.position).magnitude);
        IsTurn = true;
    }
    if (Physics.Raycast(transform.position, transform.forward - transform.right, out hitFoward, rayLength))
    {
        reverseForce = hitFoward.normal * (rayLength - (hitFoward.point - transform.position).magnitude);
        IsTurn = true;
    }
    if (!IsTurn)
    {
        reverseForce = Vector3.zero;
        //通过这个控制当物体躲避完障碍物以后速度变为原来的速度，为防止物体的速度越来越大
        velocitySelf = velocitySelf.normalized * (new Vector3(3, 0, 3).magnitude);
    }
    velocitySelf += reverseForce;
    transform.position += velocitySelf * Time.deltaTime;
    if (velocitySelf.magnitude > 0.01)
    {
        //控制物体转弯，让物体的正前方和速度的方向保持一致
        transform.forward = Vector3.Slerp(transform.forward, velocitySelf, Time.deltaTime);
    }
    IsTurn = false;
}
}

若水GIF截图_2016年12月10日12点6分32秒.gif

这里边注意

Paste_Image.png

这个就是获取射线碰到墙时的那个法线方向，就是操纵力的方向，如下图

Paste_Image.png

通过渗透深度，来判断操纵力的大小