From c326722a65a2a566276d0cc3ad1cb7fcdcdb9762 Mon Sep 17 00:00:00 2001
From: Relintai <relintai@protonmail.com>
Date: Mon, 4 Sep 2023 18:03:12 +0200
Subject: [PATCH] Backported from godot4:  Allow negative NavigationAgent2D
 path debug line_width for thin lines Allows the line_width for
 NavigationAgent2D path debug to go negativ for thin line rendering. - smix8
 https://github.com/godotengine/godot/commit/f6a10c0565e32e0170bcce71635d8bad16077d1d

---
 doc/classes/NavigationAgent2D.xml |  2 +-
 scene/2d/navigation_agent_2d.cpp  | 12 ++++++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/doc/classes/NavigationAgent2D.xml b/doc/classes/NavigationAgent2D.xml
index c4cb3baa7..f5ed2093d 100644
--- a/doc/classes/NavigationAgent2D.xml
+++ b/doc/classes/NavigationAgent2D.xml
@@ -168,7 +168,7 @@
 		<member name="debug_path_custom_color" type="Color" setter="set_debug_path_custom_color" getter="get_debug_path_custom_color" default="Color( 1, 1, 1, 1 )">
 			If [member debug_use_custom] is [code]true[/code] uses this color for this agent instead of global color.
 		</member>
-		<member name="debug_path_custom_line_width" type="float" setter="set_debug_path_custom_line_width" getter="get_debug_path_custom_line_width" default="1.0">
+		<member name="debug_path_custom_line_width" type="float" setter="set_debug_path_custom_line_width" getter="get_debug_path_custom_line_width" default="-1.0">
 			If [member debug_use_custom] is [code]true[/code] uses this line width for rendering paths for this agent instead of global line width.
 		</member>
 		<member name="debug_path_custom_point_size" type="float" setter="set_debug_path_custom_point_size" getter="get_debug_path_custom_point_size" default="4.0">
diff --git a/scene/2d/navigation_agent_2d.cpp b/scene/2d/navigation_agent_2d.cpp
index 78edb2893..f6029ef68 100644
--- a/scene/2d/navigation_agent_2d.cpp
+++ b/scene/2d/navigation_agent_2d.cpp
@@ -165,8 +165,8 @@ void NavigationAgent2D::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "debug_enabled"), "set_debug_enabled", "get_debug_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "debug_use_custom"), "set_debug_use_custom", "get_debug_use_custom");
 	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "debug_path_custom_color"), "set_debug_path_custom_color", "get_debug_path_custom_color");
-	ADD_PROPERTY(PropertyInfo(Variant::REAL, "debug_path_custom_point_size", PROPERTY_HINT_RANGE, "1,50,1,suffix:px"), "set_debug_path_custom_point_size", "get_debug_path_custom_point_size");
-	ADD_PROPERTY(PropertyInfo(Variant::REAL, "debug_path_custom_line_width", PROPERTY_HINT_RANGE, "1,50,1,suffix:px"), "set_debug_path_custom_line_width", "get_debug_path_custom_line_width");
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "debug_path_custom_point_size", PROPERTY_HINT_RANGE, "0,50,0.01,or_greater,suffix:px"), "set_debug_path_custom_point_size", "get_debug_path_custom_point_size");
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "debug_path_custom_line_width", PROPERTY_HINT_RANGE, "-1,50,0.01,or_greater,suffix:px"), "set_debug_path_custom_line_width", "get_debug_path_custom_line_width");
 
 	ADD_SIGNAL(MethodInfo("path_changed"));
 	ADD_SIGNAL(MethodInfo("target_reached"));
@@ -337,7 +337,7 @@ NavigationAgent2D::NavigationAgent2D() {
 	debug_enabled = false;
 	debug_path_dirty = true;
 	debug_path_custom_point_size = 4.0;
-	debug_path_custom_line_width = 1.0;
+	debug_path_custom_line_width = -1.0;
 	debug_use_custom = false;
 	debug_path_custom_color = Color(1.0, 1.0, 1.0, 1.0);
 
@@ -887,7 +887,7 @@ Color NavigationAgent2D::get_debug_path_custom_color() const {
 }
 
 void NavigationAgent2D::set_debug_path_custom_point_size(float p_point_size) {
-	debug_path_custom_point_size = MAX(0.1, p_point_size);
+	debug_path_custom_point_size = MAX(0.0, p_point_size);
 	debug_path_dirty = true;
 }
 
@@ -949,6 +949,10 @@ void NavigationAgent2D::_update_debug_path() {
 
 	RenderingServer::get_singleton()->canvas_item_add_polyline(debug_path_instance, navigation_path, debug_path_colors, debug_path_custom_line_width, false);
 
+	if (debug_path_custom_point_size <= 0.0) {
+		return;
+	}
+
 	float point_size = Navigation2DServer::get_singleton()->get_debug_navigation_agent_path_point_size();
 	float half_point_size = point_size * 0.5;