本文首发于 Iteevo Blog 转载请保留链接。
角色的运动是AI最基本的需求，运动算法需要解决角色下一步的位置和朝向。
Seek,Align,velocity
Seek,Align,velocity 是移动算法最基本的三种组成形式
1.Seek
Seek行为将当前角色的位置匹配到目标点。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Seek : MonoBehaviour {
public Vector3 TargetPos = 100*Vector3.forward;
// Update is called once per frame
void Update () {
transform.position += (TargetPos - transform.position).normalized * Time.deltaTime;
}
}
2.Align
Align行为将角色的朝向和目标方向一致。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Align : MonoBehaviour {
public float TargetAngle = 60f;//顺时针绕z轴正方向的角度
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
Quaternion target = Quaternion.Euler(Vector3.up * TargetAngle);
transform.rotation = Quaternion.Lerp(transform.rotation, target, Time.deltaTime);//
}
}
3.velocity
velocity行为将角色的运动匹配到目标速度，可以在接近目标速度的时候减速
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class VelocityMatch : MonoBehaviour {
public float timeToTargetSpeed;
public Vector3 targetVelocity;
public Vector3 selfVelocity;
public float maxAcceleration;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
Vector3 delta = targetVelocity - selfVelocity;
float Acceleration = Mathf.Min(maxAcceleration,(delta/timeToTargetSpeed).magnitude);
selfVelocity += Acceleration * Time.deltaTime*delta.normalized;
}
}
