Implemented NN Search on Rtree

Just binded the library to Godot so we can use later to have more
options on how to create holes.

demo/assets/scripts/environment/destructable/destructable_wall.gd

@@ -102,7 +102,6 @@ func _draw():
 	var meshGenerator = GeoPolyMesh.new(vector_indexes, vectors, extrusion_direction, depth)
 	var commited_mesh = meshGenerator.commit_mesh(meshInstance3d.get_active_material(0))
 	meshGenerator.free()
-
 	
 	meshInstance3d.mesh = commited_mesh
 	meshInstance3d.position += depth_position_offset
@@ -111,10 +110,11 @@ func _draw():
 
 func _re_draw():
 	var vector_indexes = GeoPolyTriangulization.triangulate(outer_polygon, inner_polygons.get_holes())
-	var vectors = []
 	
+	var vectors = []
 	vectors.append_array(outer_polygon)
 	vectors.append_array(inner_polygons.get_hole_verticies())
+	
 	WorkerThreadPool.add_task(_generate_mesh.bind(vector_indexes, vectors))
 
 func _deffered_draw(mesh: Mesh, task_id: int):

src/rectangletree.cpp

@@ -2,7 +2,7 @@
 #include "godot_cpp/core/class_db.hpp"
 #include "godot_cpp/variant/packed_int32_array.hpp"
 #include "godot_cpp/variant/packed_vector2_array.hpp"
-#include "godot_cpp/variant/typed_array.hpp"
+#include "godot_cpp/variant/vector2.hpp"
 
 RectangleTree::RectangleTree() {}
 
@@ -14,6 +14,8 @@ void RectangleTree::_bind_methods() {
                        &RectangleTree::remove);
   ClassDB::bind_method(godot::D_METHOD("query", "point"),
                        &RectangleTree::query);
+  ClassDB::bind_method(godot::D_METHOD("nearest", "point", "number"),
+                       &RectangleTree::nearest);
 }
 
 void RectangleTree::add(const Vector2 &min_bound, const Vector2 &max_bound,
@@ -41,3 +43,18 @@ PackedInt32Array RectangleTree::query(const Vector2 &point) {
 
   return return_value;
 }
+
+PackedInt32Array RectangleTree::nearest(const Vector2 &point,
+                                        const int &number) {
+  Rect rect = Rect(point.x, point.y, point.x, point.y);
+
+  PackedInt32Array return_value;
+  auto callbackLambda = [&return_value, &number](int index, float) {
+    return_value.push_back(index);
+    return return_value.size() < number;
+  };
+
+  tree.NNSearch(rect.min, rect.max, callbackLambda);
+
+  return return_value;
+}

src/rectangletree.hpp

@@ -50,4 +50,5 @@ public:
            const int &polgon_index);
   void remove(const int &polygon_index);
   PackedInt32Array query(const Vector2 &point);
+  PackedInt32Array nearest(const Vector2 &point, const int &number);
 };