static void CreateNonWalkableVolumes(NavNonWalkableCollection collection)
{
if (collection.m_Volumes == null)
{
collection.m_Volumes = new List <NavMeshModifierVolume>();
}
ClearVolumes(collection);
var surfaces = NavEdUtil.GetAllInActiveScene <NavMeshSurface>();
var colliders = surfaces
.SelectMany(s => (s as NavMeshSurface).GetComponentsInChildren <Collider>());
var threshold_sqr = 1.5f * 1.5f;
foreach (Collider c in colliders)
{
if (c.GetComponentInChildren <NavMeshModifierVolume>() != null)
{
// Skip so we can move them out of m_Volumes to make them persistent.
Debug.Log($"[NavMesh] Skipping NonWalkable generation on {c.name} because it already has a NavMeshModifierVolume child.", c);
continue;
}
// Get unrotated bounds. Hopefully these are tighter.
var t = c.transform;
var rot = t.rotation;
var pos = t.position;
t.position = Vector3.zero;
t.rotation = Quaternion.identity;
Physics.SyncTransforms();
var b = c.bounds;
t.rotation = rot;
t.position = pos;
if (b.size.sqrMagnitude > threshold_sqr)
{
var obj = new GameObject("Block NavMesh - " + t.name);
obj.transform.SetParent(t);
obj.transform.SetPositionAndRotation(pos, rot);
obj.transform.localPosition = Vector3.zero;
obj.transform.localRotation = Quaternion.identity;
var vol = obj.AddComponent <NavMeshModifierVolume>();
vol.area = (int)NavMeshAreaIndex.NotWalkable;
var offset = 0.2f;
var size = b.size;
size -= Vector3.one * offset;
vol.size = size;
vol.center = b.center + Vector3.down * offset;
Undo.RegisterCreatedObjectUndo(obj, "Create No Walk Volumes");
collection.m_Volumes.Add(vol);
}
}
Undo.RecordObject(collection, "Create No Walk Volumes");
}
static void ClearVolumes(NavNonWalkableCollection collection)
{
foreach (var entry in collection.m_Volumes)
{
if (entry != null)
{
GameObject.DestroyImmediate(entry.gameObject);
}
}
collection.m_Volumes.Clear();
}
