SceneTree.get_debug_collisions_color is not available in GDExtension

common.py

@@ -139,7 +139,8 @@ def get_sources(env, is_editor_build, include_tests):
             "util/godot/classes/editor_property.cpp",
             "util/godot/classes/editor_settings.cpp",
             "util/godot/classes/graph_edit.cpp", # Not editor-only, but only used in editor for now
-            "util/godot/classes/graph_node.cpp" # Not editor-only, but only used in editor for now
+            "util/godot/classes/graph_node.cpp", # Not editor-only, but only used in editor for now
+            "util/godot/classes/shape_3d.cpp" # Not editor-only, but only used in editor for now
         ]
 
     if include_tests:

terrain/fixed_lod/voxel_terrain.cpp

@@ -1969,7 +1969,7 @@ void VoxelTerrain::apply_mesh_update(const VoxelEngine::BlockMeshOutput &ob) {
 			const SceneTree *scene_tree = get_tree();
 #if DEBUG_ENABLED
 			if (collision_shape.is_valid()) {
-				const Color debug_color = scene_tree->get_debug_collisions_color();
+				const Color debug_color = zylann::godot::get_shape_3d_default_color(*scene_tree);
 				zylann::godot::set_shape_3d_debug_color(**collision_shape, debug_color);
 			}
 #endif

terrain/variable_lod/voxel_lod_terrain.cpp

@@ -1750,7 +1750,7 @@ inline void set_block_collision_shape(
 		const SceneTree *scene_tree = terrain.get_tree();
 #if DEBUG_ENABLED
 		if (shape.is_valid()) {
-			const Color debug_color = scene_tree->get_debug_collisions_color();
+			const Color debug_color = zylann::godot::get_shape_3d_default_color(*scene_tree);
 			zylann::godot::set_shape_3d_debug_color(**shape, debug_color);
 		}
 #endif

util/godot/classes/shape_3d.cpp

@@ -0,0 +1,24 @@
+#include "shape_3d.h"
+#include "../../math/color.h"
+#include "project_settings.h"
+#include "scene_tree.h"
+
+namespace zylann::godot {
+
+#ifdef TOOLS_ENABLED
+
+Color get_shape_3d_default_color(const SceneTree &scene_tree) {
+#if defined(ZN_GODOT)
+	return scene_tree.get_debug_collisions_color();
+
+#elif defined(ZN_GODOT_EXTENSION)
+	// TODO GDX: SceneTree.get_debug_collisions_color is not exposed
+	return ProjectSettings::get_singleton()->get_setting(
+			"debug/shapes/collision/shape_color", Color(0.0, 0.6, 0.7, 0.42)
+	)
+#endif
+}
+
+#endif
+
+} // namespace zylann::godot

util/godot/classes/shape_3d.h

@@ -2,6 +2,7 @@
 #define ZN_GODOT_SHAPE_3D_H
 
 #include "../core/version.h"
+#include "../macros.h"
 
 #if defined(ZN_GODOT)
 
@@ -16,9 +17,12 @@
 using namespace godot;
 #endif
 
+ZN_GODOT_FORWARD_DECLARE(class SceneTree);
+
 namespace zylann::godot {
 
 #ifdef DEBUG_ENABLED
+
 inline void set_shape_3d_debug_color(Shape3D &shape, const Color color) {
 	// TODO GDX: `set_debug_color` is not exposed to GDExtensions
 	// Which means there is no way for us to show debug shapes of the terrain when the option is enabled, because they
@@ -29,6 +33,11 @@ inline void set_shape_3d_debug_color(Shape3D &shape, const Color color) {
 #endif
 #endif
 }
+
+// This function is primarily to implement a workaround...
+// See https://github.com/godotengine/godot/pull/100328
+Color get_shape_3d_default_color(const SceneTree &scene_tree);
+
 #endif
 
 } // namespace zylann::godot