unity-game-engine - Unity3D OffNavMesh跳转问题

Question

我已经设置了 Unity 导航网格(四个平面)、导航代理(球体)并设置了自动和手动关闭网格链接。它现在应该在网格之间跳转。它确实在网格之间跳跃，但它是以直线进行的。

换句话说，当智能体到达边缘时，它不会真正跳起来(就像绘制脱离网格链接一样)，它只是直线移动，但速度更快一些。我尝试将一架飞机移得比其他飞机更高，但球体仍然沿直线跳跃。

事情应该是这样的吗？是否可以设置导航以跳过某个弯道？或者我应该尝试自己实现它？

Answer 1

我遇到了这个问题，并且不得不深入研究 Unity 示例。我只是希望通过提取重要的部分让人们更容易。

要在导航网格链接上应用您自己的动画/过渡，您需要告诉 Unity 您将处理所有离线网格链接遍历，然后添加定期检查代理是否位于离线网格链接上的代码。最后，当转换完成时，您需要告诉 Unity 您已移动代理，并恢复正常的导航网格行为。

处理链接逻辑的方式取决于您。你可以走一条直线，有一个旋转的虫洞，等等。对于跳跃，unity 使用动画进度作为 lerp 参数来遍历链接，这效果非常好。 (如果您正在执行循环或更复杂的动画，则效果不太好)

重要的统一位是:

_navAgent.autoTraverseOffMeshLink = false; //in Start()
_navAgent.currentOffMeshLinkData; //the link data - this contains start and end points, etc
_navAgent.CompleteOffMeshLink(); //Tell unity we have traversed the link (do this when you've moved the transform to the end point)
_navAgent.Resume(); //Resume normal navmesh behaviour

现在是一个简单的跳跃示例...

using UnityEngine;

[RequireComponent(typeof(NavMeshAgent))]
public class NavMeshAnimator : MonoBehaviour
{
    private NavMeshAgent _navAgent;
    private bool _traversingLink;
    private OffMeshLinkData _currLink;

    void Start()
    {
        // Cache the nav agent and tell unity we will handle link traversal
        _navAgent = GetComponent<NavMeshAgent>();
        _navAgent.autoTraverseOffMeshLink = false;
    }

    void Update()
    {
        //don't do anything if the navagent is disabled
        if (!_navAgent.enabled) return;

        if (_navAgent.isOnOffMeshLink)
        {
            if (!_traversingLink)
            {
                //This is done only once. The animation's progress will determine link traversal.
                animation.CrossFade("Jump", 0.1f, PlayMode.StopAll);
                //cache current link
                _currLink = _navAgent.currentOffMeshLinkData;
                //start traversing
                _traversingLink = true;
            }

            //lerp from link start to link end in time to animation
            var tlerp = animation["Jump"].normalizedTime;
            //straight line from startlink to endlink
            var newPos = Vector3.Lerp(_currLink.startPos, _currLink.endPos, tlerp);
            //add the 'hop'
            newPos.y += 2f * Mathf.Sin(Mathf.PI * tlerp);
            //Update transform position
            transform.position = newPos;

            // when the animation is stopped, we've reached the other side. Don't use looping animations with this control setup
            if (!animation.isPlaying)
            {
                //make sure the player is right on the end link
                transform.position = _currLink.endPos;
                //internal logic reset
                _traversingLink = false;
                //Tell unity we have traversed the link
                _navAgent.CompleteOffMeshLink();
                //Resume normal navmesh behaviour
                _navAgent.Resume();
            }
        }
        else
        {
            //...update walk/idle animations appropriately ...etc