Fix default collision shape on imported rigidbody

editor/import/3d/resource_importer_scene.cpp

@@ -1959,7 +1959,7 @@ void ResourceImporterScene::get_internal_import_options(InternalImportCategory p
 			r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "generate/physics", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED), false));
 			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "generate/navmesh", PROPERTY_HINT_ENUM, "Disabled,Mesh + NavMesh,NavMesh Only"), 0));
 			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "physics/body_type", PROPERTY_HINT_ENUM, "Static,Dynamic,Area"), 0));
-			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "physics/shape_type", PROPERTY_HINT_ENUM, "Decompose Convex,Simple Convex,Trimesh,Box,Sphere,Cylinder,Capsule", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED), 2));
+			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "physics/shape_type", PROPERTY_HINT_ENUM, "Decompose Convex,Simple Convex,Trimesh,Box,Sphere,Cylinder,Capsule,Automatic", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED), 7));
 			r_options->push_back(ImportOption(PropertyInfo(Variant::OBJECT, "physics/physics_material_override", PROPERTY_HINT_RESOURCE_TYPE, "PhysicsMaterial"), Variant()));
 			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "physics/layer", PROPERTY_HINT_LAYERS_3D_PHYSICS), 1));
 			r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "physics/mask", PROPERTY_HINT_LAYERS_3D_PHYSICS), 1));

editor/import/3d/resource_importer_scene.h

@@ -212,6 +212,7 @@ class ResourceImporterScene : public ResourceImporter {
 		SHAPE_TYPE_SPHERE,
 		SHAPE_TYPE_CYLINDER,
 		SHAPE_TYPE_CAPSULE,
+		SHAPE_TYPE_AUTOMATIC,
 	};
 
 	static Error _check_resource_save_paths(const Dictionary &p_data);
@@ -324,11 +325,21 @@ public:
 template <typename M>
 Vector<Ref<Shape3D>> ResourceImporterScene::get_collision_shapes(const Ref<ImporterMesh> &p_mesh, const M &p_options, float p_applied_root_scale) {
 	ERR_FAIL_COND_V(p_mesh.is_null(), Vector<Ref<Shape3D>>());
-	ShapeType generate_shape_type = SHAPE_TYPE_TRIMESH;
+
+	ShapeType generate_shape_type = SHAPE_TYPE_AUTOMATIC;
 	if (p_options.has(SNAME("physics/shape_type"))) {
 		generate_shape_type = (ShapeType)p_options[SNAME("physics/shape_type")].operator int();
 	}
 
+	if (generate_shape_type == SHAPE_TYPE_AUTOMATIC) {
+		BodyType body_type = BODY_TYPE_STATIC;
+		if (p_options.has(SNAME("physics/body_type"))) {
+			body_type = (BodyType)p_options[SNAME("physics/body_type")].operator int();
+		}
+
+		generate_shape_type = body_type == BODY_TYPE_DYNAMIC ? SHAPE_TYPE_DECOMPOSE_CONVEX : SHAPE_TYPE_TRIMESH;
+	}
+
 	if (generate_shape_type == SHAPE_TYPE_DECOMPOSE_CONVEX) {
 		Ref<MeshConvexDecompositionSettings> decomposition_settings = Ref<MeshConvexDecompositionSettings>();
 		decomposition_settings.instantiate();
@@ -482,11 +493,20 @@ template <typename M>
 Transform3D ResourceImporterScene::get_collision_shapes_transform(const M &p_options) {
 	Transform3D transform;
 
-	ShapeType generate_shape_type = SHAPE_TYPE_TRIMESH;
+	ShapeType generate_shape_type = SHAPE_TYPE_AUTOMATIC;
 	if (p_options.has(SNAME("physics/shape_type"))) {
 		generate_shape_type = (ShapeType)p_options[SNAME("physics/shape_type")].operator int();
 	}
 
+	if (generate_shape_type == SHAPE_TYPE_AUTOMATIC) {
+		BodyType body_type = BODY_TYPE_STATIC;
+		if (p_options.has(SNAME("physics/body_type"))) {
+			body_type = (BodyType)p_options[SNAME("physics/body_type")].operator int();
+		}
+
+		generate_shape_type = body_type == BODY_TYPE_DYNAMIC ? SHAPE_TYPE_DECOMPOSE_CONVEX : SHAPE_TYPE_TRIMESH;
+	}
+
 	if (generate_shape_type == SHAPE_TYPE_BOX ||
 			generate_shape_type == SHAPE_TYPE_SPHERE ||
 			generate_shape_type == SHAPE_TYPE_CYLINDER ||