public Vector3 getSteering(Rigidbody target, Vector3 offset, out Vector3 targetPos)
{
// 得到世界坐标的偏移位置
Vector3 worldOffsetPos = target.position + target.transform.TransformDirection(offset);
Debug.DrawLine(transform.position, worldOffsetPos);
/* 计算距离到偏移点 */
Vector3 displacement = worldOffsetPos - transform.position;
float distance = displacement.magnitude;
float speed = rb.velocity.magnitude;
/* 预测的距离不要超过当前距离 */
float prediction;
if (speed <= distance / maxPrediction)
{
prediction = maxPrediction;
}
else
{
prediction = distance / speed;
}
/* 目标位置 */
targetPos = worldOffsetPos + target.velocity * prediction;
return(steeringBasics.Arrive(targetPos));
}
public Vector3 GetSteering(Rigidbody target, ICollection <Rigidbody> obstacles, out Vector3 bestHidingSpot)
{
// 临时值
float distToClostest = Mathf.Infinity;
bestHidingSpot = Vector3.zero;
// 找到最近的隐藏点 ， 遍历所有障碍
foreach (Rigidbody r in obstacles)
{
// 这个障碍 可以作为隐蔽的位置
Vector3 hidingSpot = GetHidingPosition(r, target);
// 离我多远
float dist = Vector3.Distance(hidingSpot, transform.position);
// 最近就保存
if (dist < distToClostest)
{
distToClostest = dist;
bestHidingSpot = hidingSpot;
}
}
//如果没有发现隐藏点，就只躲避敌人 (比如我和敌人都处于所有障碍的一侧)
if (distToClostest == Mathf.Infinity)
{
return(evade.GetSteering(target));
}
Debug.DrawLine(transform.position, bestHidingSpot);
// 返回加速度
return(steeringBasics.Arrive(bestHidingSpot));
}
public Vector3 GetSteering(ICollection <Rigidbody> targets)
{
Vector3 centerOfMass = Vector3.zero;
int count = 0;
/* 得到我前方视野内所有角色的 中心 */
foreach (Rigidbody r in targets)
{
// 在视野内 （视野是 无限扇形）
if (steeringBasics.isFacing(r.position, facingCosineVal))
{
centerOfMass += r.position;
count++;
}
}
if (count == 0) // 我前面没有人。 漫游好了
{
return(Vector3.zero);
}
else
{
// 目标目标位置
centerOfMass = centerOfMass / count;
return(steeringBasics.Arrive(centerOfMass));
}
}
// Update is called once per frame
void Update()
{
Vector3 accel = steeringBasics.Arrive(targetPosition);
steeringBasics.Steer(accel);
steeringBasics.LookWhereYoureGoing();
}
public Vector3 getSteering(LinePath path, bool pathLoop, out Vector3 targetPosition)
{
// 如果路径只有一个节点, 那么只需转到该位置
if (path.Length == 1)
{
targetPosition = path[0];
}
//否则, 在该路径上找到最接近的点, 然后转到该位置。
else
{
if (!pathLoop)
{
/* 查找此路径上的 最终目标 */
Vector2 finalDestination = (pathDirection > 0) ? path[path.Length - 1] : path[0];
// 如果我们足够接近最终目的地, 就停止
/* If we are close enough to the final destination then either stop moving or reverse if
* the character is set to loop on paths */
if (Vector2.Distance(transform.position, finalDestination) < stopRadius)
{
targetPosition = finalDestination;
rb.velocity = Vector2.zero;
return(Vector2.zero);
}
}
/* 在给定路径上，得到最接近的位置点的参数*/
float param = path.getParam(transform.position);
/* 向下移动的路径 */
param += pathDirection * pathOffset;
/* 得到目标位置 */
targetPosition = path.getPosition(param, pathLoop);
}
return(steeringBasics.Arrive(targetPosition));
}