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Don't crash when trying to add an invalid navmesh

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It is possible to try to add an invalid object as a navmesh through
GDScript which results in an engine crash. This creates a debug message
that should help the user figure out what's wrong.

(cherry picked from commit 555eebf3f4845c8138c24ded96fcb3fa5c67787a)
This commit is contained in:
Hein-Pieter van Braam 2018-03-02 09:37:32 +01:00
parent 87476c057a
commit cee20e24bd
1 changed files with 1 additions and 0 deletions
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1
scene/3d/navigation.cpp
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@ -35,6 +35,7 @@ void Navigation::_navmesh_link(int p_id) {
ERR_FAIL_COND(!navmesh_map.has(p_id));
NavMesh &nm = navmesh_map[p_id];
ERR_FAIL_COND(nm.linked);
ERR_FAIL_COND(nm.navmesh.is_null());
PoolVector<Vector3> vertices = nm.navmesh->get_vertices();
int len = vertices.size();