56 lines
1.8 KiB
C#
56 lines
1.8 KiB
C#
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using UnityEngine;
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namespace Pathfinding {
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/// <summary>
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/// Attach to any GameObject and the object will be clamped to the navmesh.
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/// If a GameObject has this component attached, one or more graph linecasts will be carried out every frame to ensure that the object
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/// does not leave the navmesh area.
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/// It can be used with GridGraphs, but Navmesh based ones are prefered.
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///
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/// Note: This has partly been replaced by using an RVOController along with RVONavmesh.
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/// It will not yield exactly the same results though, so this script is still useful in some cases.
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/// </summary>
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[HelpURL("http://arongranberg.com/astar/documentation/stable/class_pathfinding_1_1_navmesh_clamp.php")]
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public class NavmeshClamp : MonoBehaviour {
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GraphNode prevNode;
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Vector3 prevPos;
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// Update is called once per frame
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void LateUpdate () {
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if (prevNode == null) {
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var nninfo = AstarPath.active.GetNearest(transform.position);
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prevNode = nninfo.node;
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prevPos = transform.position;
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}
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if (prevNode == null) {
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return;
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}
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if (prevNode != null) {
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var graph = AstarData.GetGraph(prevNode) as IRaycastableGraph;
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if (graph != null) {
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GraphHitInfo hit;
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if (graph.Linecast(prevPos, transform.position, out hit)) {
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hit.point.y = transform.position.y;
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Vector3 closest = VectorMath.ClosestPointOnLine(hit.tangentOrigin, hit.tangentOrigin+hit.tangent, transform.position);
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Vector3 ohit = hit.point;
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ohit = ohit + Vector3.ClampMagnitude((Vector3)hit.node.position-ohit, 0.008f);
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if (graph.Linecast(ohit, closest, out hit)) {
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hit.point.y = transform.position.y;
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transform.position = hit.point;
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} else {
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closest.y = transform.position.y;
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transform.position = closest;
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}
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}
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prevNode = hit.node;
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}
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}
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prevPos = transform.position;
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}
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}
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}
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