91 lines
2.6 KiB
C#
91 lines
2.6 KiB
C#
using UnityEngine;
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using UnityEngine.AI;
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using System.Collections;
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using System.Collections.Generic;
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using NavMeshBuilder = UnityEngine.AI.NavMeshBuilder;
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// Build and update a localized navmesh from the sources marked by NavMeshSourceTag
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[DefaultExecutionOrder(-102)]
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public class LocalNavMeshBuilder : MonoBehaviour
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{
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// The center of the build
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public Transform m_Tracked;
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// The size of the build bounds
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public Vector3 m_Size = new Vector3(80.0f, 20.0f, 80.0f);
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NavMeshData m_NavMesh;
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AsyncOperation m_Operation;
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NavMeshDataInstance m_Instance;
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List<NavMeshBuildSource> m_Sources = new List<NavMeshBuildSource>();
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IEnumerator Start()
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{
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while (true)
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{
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UpdateNavMesh(true);
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yield return m_Operation;
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}
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}
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void OnEnable()
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{
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// Construct and add navmesh
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m_NavMesh = new NavMeshData();
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m_Instance = NavMesh.AddNavMeshData(m_NavMesh);
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if (m_Tracked == null)
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m_Tracked = transform;
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UpdateNavMesh(false);
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}
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void OnDisable()
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{
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// Unload navmesh and clear handle
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m_Instance.Remove();
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}
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void UpdateNavMesh(bool asyncUpdate = false)
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{
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NavMeshSourceTag.Collect(ref m_Sources);
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var defaultBuildSettings = NavMesh.GetSettingsByID(0);
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var bounds = QuantizedBounds();
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if (asyncUpdate)
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m_Operation = NavMeshBuilder.UpdateNavMeshDataAsync(m_NavMesh, defaultBuildSettings, m_Sources, bounds);
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else
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NavMeshBuilder.UpdateNavMeshData(m_NavMesh, defaultBuildSettings, m_Sources, bounds);
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}
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static Vector3 Quantize(Vector3 v, Vector3 quant)
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{
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float x = quant.x * Mathf.Floor(v.x / quant.x);
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float y = quant.y * Mathf.Floor(v.y / quant.y);
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float z = quant.z * Mathf.Floor(v.z / quant.z);
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return new Vector3(x, y, z);
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}
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Bounds QuantizedBounds()
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{
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// Quantize the bounds to update only when theres a 10% change in size
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var center = m_Tracked ? m_Tracked.position : transform.position;
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return new Bounds(Quantize(center, 0.1f * m_Size), m_Size);
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}
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void OnDrawGizmosSelected()
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{
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if (m_NavMesh)
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{
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Gizmos.color = Color.green;
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Gizmos.DrawWireCube(m_NavMesh.sourceBounds.center, m_NavMesh.sourceBounds.size);
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}
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Gizmos.color = Color.yellow;
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var bounds = QuantizedBounds();
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Gizmos.DrawWireCube(bounds.center, bounds.size);
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Gizmos.color = Color.green;
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var center = m_Tracked ? m_Tracked.position : transform.position;
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Gizmos.DrawWireCube(center, m_Size);
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}
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}
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