From 9c8626bfd8b945787aa258c5706a6a2e0578e089 Mon Sep 17 00:00:00 2001
From: smix8 <52464204+smix8@users.noreply.github.com>
Date: Tue, 13 Jun 2023 10:35:52 +0200
Subject: [PATCH] Add NavigationPolygon cell_size property

Adds NavigationPolygon cell_size property.
---
 doc/classes/NavigationPolygon.xml      |  5 +++++
 scene/resources/navigation_polygon.cpp | 14 ++++++++++++++
 scene/resources/navigation_polygon.h   |  5 +++++
 3 files changed, 24 insertions(+)

diff --git a/doc/classes/NavigationPolygon.xml b/doc/classes/NavigationPolygon.xml
index 73725117bd52..a40f3d3d3857 100644
--- a/doc/classes/NavigationPolygon.xml
+++ b/doc/classes/NavigationPolygon.xml
@@ -148,4 +148,9 @@
 			</description>
 		</method>
 	</methods>
+	<members>
+		<member name="cell_size" type="float" setter="set_cell_size" getter="get_cell_size" default="1.0">
+			The cell size used to rasterize the navigation mesh vertices. Must match with the cell size on the navigation map.
+		</member>
+	</members>
 </class>
diff --git a/scene/resources/navigation_polygon.cpp b/scene/resources/navigation_polygon.cpp
index 8ba257907581..0b60d46d4070 100644
--- a/scene/resources/navigation_polygon.cpp
+++ b/scene/resources/navigation_polygon.cpp
@@ -183,6 +183,7 @@ Ref<NavigationMesh> NavigationPolygon::get_navigation_mesh() {
 		for (int i(0); i < get_polygon_count(); i++) {
 			navigation_mesh->add_polygon(get_polygon(i));
 		}
+		navigation_mesh->set_cell_size(cell_size); // Needed to not fail the cell size check on the server
 	}
 
 	return navigation_mesh;
@@ -322,6 +323,15 @@ void NavigationPolygon::make_polygons_from_outlines() {
 	emit_changed();
 }
 
+void NavigationPolygon::set_cell_size(real_t p_cell_size) {
+	cell_size = p_cell_size;
+	get_navigation_mesh()->set_cell_size(cell_size);
+}
+
+real_t NavigationPolygon::get_cell_size() const {
+	return cell_size;
+}
+
 void NavigationPolygon::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_vertices", "vertices"), &NavigationPolygon::set_vertices);
 	ClassDB::bind_method(D_METHOD("get_vertices"), &NavigationPolygon::get_vertices);
@@ -347,7 +357,11 @@ void NavigationPolygon::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("_set_outlines", "outlines"), &NavigationPolygon::_set_outlines);
 	ClassDB::bind_method(D_METHOD("_get_outlines"), &NavigationPolygon::_get_outlines);
 
+	ClassDB::bind_method(D_METHOD("set_cell_size", "cell_size"), &NavigationPolygon::set_cell_size);
+	ClassDB::bind_method(D_METHOD("get_cell_size"), &NavigationPolygon::get_cell_size);
+
 	ADD_PROPERTY(PropertyInfo(Variant::PACKED_VECTOR2_ARRAY, "vertices", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "set_vertices", "get_vertices");
 	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "polygons", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "_set_polygons", "_get_polygons");
 	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "outlines", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "_set_outlines", "_get_outlines");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "cell_size", PROPERTY_HINT_RANGE, "0.01,500.0,0.01,or_greater,suffix:px"), "set_cell_size", "get_cell_size");
 }
diff --git a/scene/resources/navigation_polygon.h b/scene/resources/navigation_polygon.h
index 015127aaeb75..01780c187c82 100644
--- a/scene/resources/navigation_polygon.h
+++ b/scene/resources/navigation_polygon.h
@@ -51,6 +51,8 @@ class NavigationPolygon : public Resource {
 	// Navigation mesh
 	Ref<NavigationMesh> navigation_mesh;
 
+	real_t cell_size = 1.0f;
+
 protected:
 	static void _bind_methods();
 
@@ -87,6 +89,9 @@ class NavigationPolygon : public Resource {
 
 	Ref<NavigationMesh> get_navigation_mesh();
 
+	void set_cell_size(real_t p_cell_size);
+	real_t get_cell_size() const;
+
 	NavigationPolygon() {}
 	~NavigationPolygon() {}
 };