Merge pull request #95261 from rburing/2d_physics_module

Move Godot Physics 2D into a module; add dummy 2D physics server

COPYRIGHT.txt

@@ -63,6 +63,11 @@ Copyright: 2011, Ole Kniemeyer, MAXON, www.maxon.net
  2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat and Zlib
 
+Files: ./modules/godot_physics_2d/godot_joints_2d.cpp
+Comment: Chipmunk2D Joint Constraints
+Copyright: 2007, Scott Lembcke
+License: Expat
+
 Files: ./modules/godot_physics_3d/gjk_epa.cpp
  ./modules/godot_physics_3d/joints/godot_generic_6dof_joint_3d.cpp
  ./modules/godot_physics_3d/joints/godot_generic_6dof_joint_3d.h
@@ -126,11 +131,6 @@ Copyright: 2001, Robert Penner
  2007-2014, Juan Linietsky, Ariel Manzur
 License: Expat
 
-Files: ./servers/physics_2d/godot_joints_2d.cpp
-Comment: Chipmunk2D Joint Constraints
-Copyright: 2007, Scott Lembcke
-License: Expat
-
 Files: ./servers/rendering/renderer_rd/shaders/ss_effects_downsample.glsl
  ./servers/rendering/renderer_rd/shaders/ssao_blur.glsl
  ./servers/rendering/renderer_rd/shaders/ssao_importance_map.glsl

doc/classes/ProjectSettings.xml

@@ -2215,6 +2215,7 @@
 		<member name="physics/2d/physics_engine" type="String" setter="" getter="" default="&quot;DEFAULT&quot;">
 			Sets which physics engine to use for 2D physics.
 			"DEFAULT" and "GodotPhysics2D" are the same, as there is currently no alternative 2D physics server implemented.
+			"Dummy" is a 2D physics server that does nothing and returns only dummy values, effectively disabling all 2D physics functionality.
 		</member>
 		<member name="physics/2d/run_on_separate_thread" type="bool" setter="" getter="" default="false">
 			If [code]true[/code], the 2D physics server runs on a separate thread, making better use of multi-core CPUs. If [code]false[/code], the 2D physics server runs on the main thread. Running the physics server on a separate thread can increase performance, but restricts API access to only physics process.

main/main.cpp

@@ -80,6 +80,7 @@
 #include "servers/navigation_server_2d.h"
 #include "servers/navigation_server_2d_dummy.h"
 #include "servers/physics_server_2d.h"
+#include "servers/physics_server_2d_dummy.h"
 
 #ifndef _3D_DISABLED
 #include "servers/physics_server_3d.h"
@@ -340,7 +341,15 @@ void initialize_physics() {
 		// Physics server not found, Use the default physics
 		physics_server_2d = PhysicsServer2DManager::get_singleton()->new_default_server();
 	}
-	ERR_FAIL_NULL(physics_server_2d);
+
+	// Fall back to dummy if no default server has been registered.
+	if (!physics_server_2d) {
+		WARN_PRINT(vformat("Falling back to dummy PhysicsServer2D; 2D physics functionality will be disabled. If this is intended, set the %s project setting to Dummy.", PhysicsServer2DManager::setting_property_name));
+		physics_server_2d = memnew(PhysicsServer2DDummy);
+	}
+
+	// Should be impossible, but make sure it's not null.
+	ERR_FAIL_NULL_MSG(physics_server_2d, "Failed to initialize PhysicsServer2D.");
 	physics_server_2d->init();
 }
 

modules/godot_physics_2d/SCsub

@@ -0,0 +1,5 @@
+#!/usr/bin/env python
+
+Import('env')
+
+env.add_source_files(env.modules_sources, "*.cpp")

modules/godot_physics_2d/config.py

@@ -0,0 +1,6 @@
+def can_build(env, platform):
+    return True
+
+
+def configure(env):
+    pass

modules/godot_physics_2d/register_types.cpp

@@ -0,0 +1,61 @@
+/**************************************************************************/
+/*  register_types.cpp                                                    */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "register_types.h"
+
+#include "godot_physics_server_2d.h"
+#include "servers/physics_server_2d.h"
+#include "servers/physics_server_2d_wrap_mt.h"
+
+static PhysicsServer2D *_createGodotPhysics2DCallback() {
+#ifdef THREADS_ENABLED
+	bool using_threads = GLOBAL_GET("physics/2d/run_on_separate_thread");
+#else
+	bool using_threads = false;
+#endif
+
+	PhysicsServer2D *physics_server_2d = memnew(GodotPhysicsServer2D(using_threads));
+
+	return memnew(PhysicsServer2DWrapMT(physics_server_2d, using_threads));
+}
+
+void initialize_godot_physics_2d_module(ModuleInitializationLevel p_level) {
+	if (p_level != MODULE_INITIALIZATION_LEVEL_SERVERS) {
+		return;
+	}
+	PhysicsServer2DManager::get_singleton()->register_server("GodotPhysics2D", callable_mp_static(_createGodotPhysics2DCallback));
+	PhysicsServer2DManager::get_singleton()->set_default_server("GodotPhysics2D");
+}
+
+void uninitialize_godot_physics_2d_module(ModuleInitializationLevel p_level) {
+	if (p_level != MODULE_INITIALIZATION_LEVEL_SERVERS) {
+		return;
+	}
+}

modules/godot_physics_2d/register_types.h

@@ -0,0 +1,39 @@
+/**************************************************************************/
+/*  register_types.h                                                      */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef GODOT_PHYSICS_2D_REGISTER_TYPES_H
+#define GODOT_PHYSICS_2D_REGISTER_TYPES_H
+
+#include "modules/register_module_types.h"
+
+void initialize_godot_physics_2d_module(ModuleInitializationLevel p_level);
+void uninitialize_godot_physics_2d_module(ModuleInitializationLevel p_level);
+
+#endif // GODOT_PHYSICS_2D_REGISTER_TYPES_H

scene/2d/physics/shape_cast_2d.cpp

@@ -34,7 +34,7 @@
 #include "scene/2d/physics/collision_object_2d.h"
 #include "scene/2d/physics/physics_body_2d.h"
 #include "scene/resources/2d/circle_shape_2d.h"
-#include "servers/physics_2d/godot_physics_server_2d.h"
+#include "servers/physics_server_2d.h"
 
 void ShapeCast2D::set_target_position(const Vector2 &p_point) {
 	target_position = p_point;

scu_builders.py

@@ -322,6 +322,7 @@ def generate_scu_files(max_includes_per_scu):
     process_folder(["modules/openxr"], ["register_types"])
     process_folder(["modules/openxr/action_map"])
     process_folder(["modules/openxr/editor"])
+    process_folder(["modules/godot_physics_2d"])
     process_folder(["modules/godot_physics_3d"])
     process_folder(["modules/godot_physics_3d/joints"])
 
@@ -350,7 +351,6 @@ def generate_scu_files(max_includes_per_scu):
     process_folder(["servers/rendering/renderer_rd/effects"])
     process_folder(["servers/rendering/renderer_rd/environment"])
     process_folder(["servers/rendering/renderer_rd/storage_rd"])
-    process_folder(["servers/physics_2d"])
     process_folder(["servers/audio"])
     process_folder(["servers/audio/effects"])
 

servers/SCsub

@@ -25,8 +25,6 @@ SConscript("navigation/SCsub")
 SConscript("rendering/SCsub")
 SConscript("text/SCsub")
 
-SConscript("physics_2d/SCsub")
-
 if not env["disable_3d"]:
     env.add_source_files(env.servers_sources, "physics_server_3d.cpp")
     env.add_source_files(env.servers_sources, "physics_server_3d_wrap_mt.cpp")

servers/physics_2d/SCsub

@@ -1,5 +0,0 @@
-#!/usr/bin/env python
-
-Import("env")
-
-env.add_source_files(env.servers_sources, "*.cpp")

servers/physics_server_2d.cpp

@@ -972,7 +972,9 @@ String PhysicsServer2DManager::get_server_name(int p_id) {
 }
 
 PhysicsServer2D *PhysicsServer2DManager::new_default_server() {
-	ERR_FAIL_COND_V(default_server_id == -1, nullptr);
+	if (default_server_id == -1) {
+		return nullptr;
+	}
 	Variant ret;
 	Callable::CallError ce;
 	physics_2d_servers[default_server_id].create_callback.callp(nullptr, 0, ret, ce);

servers/physics_server_2d_dummy.h

@@ -0,0 +1,350 @@
+/**************************************************************************/
+/*  physics_server_2d_dummy.h                                             */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef PHYSICS_SERVER_2D_DUMMY_H
+#define PHYSICS_SERVER_2D_DUMMY_H
+
+#include "physics_server_2d.h"
+
+class PhysicsDirectBodyState2DDummy : public PhysicsDirectBodyState2D {
+	GDCLASS(PhysicsDirectBodyState2DDummy, PhysicsDirectBodyState2D);
+
+	PhysicsDirectSpaceState2D *space_state_dummy = nullptr;
+
+public:
+	virtual Vector2 get_total_gravity() const override { return Vector2(); }
+	virtual real_t get_total_linear_damp() const override { return 0; }
+	virtual real_t get_total_angular_damp() const override { return 0; }
+
+	virtual Vector2 get_center_of_mass() const override { return Vector2(); }
+	virtual Vector2 get_center_of_mass_local() const override { return Vector2(); }
+	virtual real_t get_inverse_mass() const override { return 0; }
+	virtual real_t get_inverse_inertia() const override { return 0; }
+
+	virtual void set_linear_velocity(const Vector2 &p_velocity) override {}
+	virtual Vector2 get_linear_velocity() const override { return Vector2(); }
+
+	virtual void set_angular_velocity(real_t p_velocity) override {}
+	virtual real_t get_angular_velocity() const override { return 0; }
+
+	virtual void set_transform(const Transform2D &p_transform) override {}
+	virtual Transform2D get_transform() const override { return Transform2D(); }
+
+	virtual Vector2 get_velocity_at_local_position(const Vector2 &p_position) const override { return Vector2(); }
+
+	virtual void apply_central_impulse(const Vector2 &p_impulse) override {}
+	virtual void apply_torque_impulse(real_t p_torque) override {}
+	virtual void apply_impulse(const Vector2 &p_impulse, const Vector2 &p_position = Vector2()) override {}
+
+	virtual void apply_central_force(const Vector2 &p_force) override {}
+	virtual void apply_force(const Vector2 &p_force, const Vector2 &p_position = Vector2()) override {}
+	virtual void apply_torque(real_t p_torque) override {}
+
+	virtual void add_constant_central_force(const Vector2 &p_force) override {}
+	virtual void add_constant_force(const Vector2 &p_force, const Vector2 &p_position = Vector2()) override {}
+	virtual void add_constant_torque(real_t p_torque) override {}
+
+	virtual void set_constant_force(const Vector2 &p_force) override {}
+	virtual Vector2 get_constant_force() const override { return Vector2(); }
+
+	virtual void set_constant_torque(real_t p_torque) override {}
+	virtual real_t get_constant_torque() const override { return 0; }
+
+	virtual void set_sleep_state(bool p_enable) override {}
+	virtual bool is_sleeping() const override { return false; }
+
+	virtual int get_contact_count() const override { return 0; }
+
+	virtual Vector2 get_contact_local_position(int p_contact_idx) const override { return Vector2(); }
+	virtual Vector2 get_contact_local_normal(int p_contact_idx) const override { return Vector2(); }
+	virtual int get_contact_local_shape(int p_contact_idx) const override { return 0; }
+	virtual Vector2 get_contact_local_velocity_at_position(int p_contact_idx) const override { return Vector2(); }
+
+	virtual RID get_contact_collider(int p_contact_idx) const override { return RID(); }
+	virtual Vector2 get_contact_collider_position(int p_contact_idx) const override { return Vector2(); }
+	virtual ObjectID get_contact_collider_id(int p_contact_idx) const override { return ObjectID(); }
+	virtual Object *get_contact_collider_object(int p_contact_idx) const override { return nullptr; }
+	virtual int get_contact_collider_shape(int p_contact_idx) const override { return 0; }
+	virtual Vector2 get_contact_collider_velocity_at_position(int p_contact_idx) const override { return Vector2(); }
+	virtual Vector2 get_contact_impulse(int p_contact_idx) const override { return Vector2(); }
+
+	virtual real_t get_step() const override { return 0; }
+	virtual void integrate_forces() override {}
+
+	virtual PhysicsDirectSpaceState2D *get_space_state() override { return space_state_dummy; }
+
+	PhysicsDirectBodyState2DDummy(PhysicsDirectSpaceState2D *p_space_state_dummy) {
+		space_state_dummy = p_space_state_dummy;
+	}
+};
+
+class PhysicsDirectSpaceState2DDummy : public PhysicsDirectSpaceState2D {
+	GDCLASS(PhysicsDirectSpaceState2DDummy, PhysicsDirectSpaceState2D);
+
+public:
+	virtual bool intersect_ray(const RayParameters &p_parameters, RayResult &r_result) override { return false; }
+
+	virtual int intersect_point(const PointParameters &p_parameters, ShapeResult *r_results, int p_result_max) override { return 0; }
+
+	virtual int intersect_shape(const ShapeParameters &p_parameters, ShapeResult *r_results, int p_result_max) override { return 0; }
+	virtual bool cast_motion(const ShapeParameters &p_parameters, real_t &p_closest_safe, real_t &p_closest_unsafe) override { return false; }
+	virtual bool collide_shape(const ShapeParameters &p_parameters, Vector2 *r_results, int p_result_max, int &r_result_count) override { return false; }
+	virtual bool rest_info(const ShapeParameters &p_parameters, ShapeRestInfo *r_info) override { return false; }
+};
+
+class PhysicsServer2DDummy : public PhysicsServer2D {
+	GDCLASS(PhysicsServer2DDummy, PhysicsServer2D);
+
+	PhysicsDirectSpaceState2DDummy *space_state_dummy = nullptr;
+	PhysicsDirectBodyState2DDummy *body_state_dummy = nullptr;
+
+public:
+	virtual RID world_boundary_shape_create() override { return RID(); }
+	virtual RID separation_ray_shape_create() override { return RID(); }
+	virtual RID segment_shape_create() override { return RID(); }
+	virtual RID circle_shape_create() override { return RID(); }
+	virtual RID rectangle_shape_create() override { return RID(); }
+	virtual RID capsule_shape_create() override { return RID(); }
+	virtual RID convex_polygon_shape_create() override { return RID(); }
+	virtual RID concave_polygon_shape_create() override { return RID(); }
+
+	virtual void shape_set_data(RID p_shape, const Variant &p_data) override {}
+	virtual void shape_set_custom_solver_bias(RID p_shape, real_t p_bias) override {}
+
+	virtual ShapeType shape_get_type(RID p_shape) const override { return ShapeType::SHAPE_CIRCLE; }
+	virtual Variant shape_get_data(RID p_shape) const override { return Variant(); }
+	virtual real_t shape_get_custom_solver_bias(RID p_shape) const override { return 0; }
+
+	virtual bool shape_collide(RID p_shape_A, const Transform2D &p_xform_A, const Vector2 &p_motion_A, RID p_shape_B, const Transform2D &p_xform_B, const Vector2 &p_motion_B, Vector2 *r_results, int p_result_max, int &r_result_count) override { return false; }
+
+	/* SPACE API */
+
+	virtual RID space_create() override { return RID(); }
+	virtual void space_set_active(RID p_space, bool p_active) override {}
+	virtual bool space_is_active(RID p_space) const override { return false; }
+
+	virtual void space_set_param(RID p_space, SpaceParameter p_param, real_t p_value) override {}
+	virtual real_t space_get_param(RID p_space, SpaceParameter p_param) const override { return 0; }
+
+	virtual PhysicsDirectSpaceState2D *space_get_direct_state(RID p_space) override { return space_state_dummy; }
+
+	virtual void space_set_debug_contacts(RID p_space, int p_max_contacts) override {}
+	virtual Vector<Vector2> space_get_contacts(RID p_space) const override { return Vector<Vector2>(); }
+	virtual int space_get_contact_count(RID p_space) const override { return 0; }
+
+	/* AREA API */
+
+	virtual RID area_create() override { return RID(); }
+
+	virtual void area_set_space(RID p_area, RID p_space) override {}
+	virtual RID area_get_space(RID p_area) const override { return RID(); }
+
+	virtual void area_add_shape(RID p_area, RID p_shape, const Transform2D &p_transform = Transform2D(), bool p_disabled = false) override {}
+	virtual void area_set_shape(RID p_area, int p_shape_idx, RID p_shape) override {}
+	virtual void area_set_shape_transform(RID p_area, int p_shape_idx, const Transform2D &p_transform) override {}
+
+	virtual int area_get_shape_count(RID p_area) const override { return 0; }
+	virtual RID area_get_shape(RID p_area, int p_shape_idx) const override { return RID(); }
+	virtual Transform2D area_get_shape_transform(RID p_area, int p_shape_idx) const override { return Transform2D(); }
+
+	virtual void area_remove_shape(RID p_area, int p_shape_idx) override {}
+	virtual void area_clear_shapes(RID p_area) override {}
+
+	virtual void area_set_shape_disabled(RID p_area, int p_shape, bool p_disabled) override {}
+
+	virtual void area_attach_object_instance_id(RID p_area, ObjectID p_id) override {}
+	virtual ObjectID area_get_object_instance_id(RID p_area) const override { return ObjectID(); }
+
+	virtual void area_attach_canvas_instance_id(RID p_area, ObjectID p_id) override {}
+	virtual ObjectID area_get_canvas_instance_id(RID p_area) const override { return ObjectID(); }
+
+	virtual void area_set_param(RID p_area, AreaParameter p_param, const Variant &p_value) override {}
+	virtual void area_set_transform(RID p_area, const Transform2D &p_transform) override {}
+
+	virtual Variant area_get_param(RID p_parea, AreaParameter p_param) const override { return Variant(); }
+	virtual Transform2D area_get_transform(RID p_area) const override { return Transform2D(); }
+
+	virtual void area_set_collision_layer(RID p_area, uint32_t p_layer) override {}
+	virtual uint32_t area_get_collision_layer(RID p_area) const override { return 0; }
+
+	virtual void area_set_collision_mask(RID p_area, uint32_t p_mask) override {}
+	virtual uint32_t area_get_collision_mask(RID p_area) const override { return 0; }
+
+	virtual void area_set_monitorable(RID p_area, bool p_monitorable) override {}
+	virtual void area_set_pickable(RID p_area, bool p_pickable) override {}
+
+	virtual void area_set_monitor_callback(RID p_area, const Callable &p_callback) override {}
+	virtual void area_set_area_monitor_callback(RID p_area, const Callable &p_callback) override {}
+
+	/* BODY API */
+
+	virtual RID body_create() override { return RID(); }
+
+	virtual void body_set_space(RID p_body, RID p_space) override {}
+	virtual RID body_get_space(RID p_body) const override { return RID(); }
+
+	virtual void body_set_mode(RID p_body, BodyMode p_mode) override {}
+	virtual BodyMode body_get_mode(RID p_body) const override { return BodyMode::BODY_MODE_STATIC; }
+
+	virtual void body_add_shape(RID p_body, RID p_shape, const Transform2D &p_transform = Transform2D(), bool p_disabled = false) override {}
+	virtual void body_set_shape(RID p_body, int p_shape_idx, RID p_shape) override {}
+	virtual void body_set_shape_transform(RID p_body, int p_shape_idx, const Transform2D &p_transform) override {}
+
+	virtual int body_get_shape_count(RID p_body) const override { return 0; }
+	virtual RID body_get_shape(RID p_body, int p_shape_idx) const override { return RID(); }
+	virtual Transform2D body_get_shape_transform(RID p_body, int p_shape_idx) const override { return Transform2D(); }
+
+	virtual void body_set_shape_disabled(RID p_body, int p_shape, bool p_disabled) override {}
+	virtual void body_set_shape_as_one_way_collision(RID p_body, int p_shape, bool p_enabled, real_t p_margin = 0) override {}
+
+	virtual void body_remove_shape(RID p_body, int p_shape_idx) override {}
+	virtual void body_clear_shapes(RID p_body) override {}
+
+	virtual void body_attach_object_instance_id(RID p_body, ObjectID p_id) override {}
+	virtual ObjectID body_get_object_instance_id(RID p_body) const override { return ObjectID(); }
+
+	virtual void body_attach_canvas_instance_id(RID p_body, ObjectID p_id) override {}
+	virtual ObjectID body_get_canvas_instance_id(RID p_body) const override { return ObjectID(); }
+
+	virtual void body_set_continuous_collision_detection_mode(RID p_body, CCDMode p_mode) override {}
+	virtual CCDMode body_get_continuous_collision_detection_mode(RID p_body) const override { return CCDMode::CCD_MODE_DISABLED; }
+
+	virtual void body_set_collision_layer(RID p_body, uint32_t p_layer) override {}
+	virtual uint32_t body_get_collision_layer(RID p_body) const override { return 0; }
+
+	virtual void body_set_collision_mask(RID p_body, uint32_t p_mask) override {}
+	virtual uint32_t body_get_collision_mask(RID p_body) const override { return 0; }
+
+	virtual void body_set_collision_priority(RID p_body, real_t p_priority) override {}
+	virtual real_t body_get_collision_priority(RID p_body) const override { return 0; }
+
+	virtual void body_set_param(RID p_body, BodyParameter p_param, const Variant &p_value) override {}
+	virtual Variant body_get_param(RID p_body, BodyParameter p_param) const override { return Variant(); }
+
+	virtual void body_reset_mass_properties(RID p_body) override {}
+
+	virtual void body_set_state(RID p_body, BodyState p_state, const Variant &p_variant) override {}
+	virtual Variant body_get_state(RID p_body, BodyState p_state) const override { return Variant(); }
+
+	virtual void body_apply_central_impulse(RID p_body, const Vector2 &p_impulse) override {}
+	virtual void body_apply_torque_impulse(RID p_body, real_t p_torque) override {}
+	virtual void body_apply_impulse(RID p_body, const Vector2 &p_impulse, const Vector2 &p_position = Vector2()) override {}
+
+	virtual void body_apply_central_force(RID p_body, const Vector2 &p_force) override {}
+	virtual void body_apply_force(RID p_body, const Vector2 &p_force, const Vector2 &p_position = Vector2()) override {}
+	virtual void body_apply_torque(RID p_body, real_t p_torque) override {}
+
+	virtual void body_add_constant_central_force(RID p_body, const Vector2 &p_force) override {}
+	virtual void body_add_constant_force(RID p_body, const Vector2 &p_force, const Vector2 &p_position = Vector2()) override {}
+	virtual void body_add_constant_torque(RID p_body, real_t p_torque) override {}
+
+	virtual void body_set_constant_force(RID p_body, const Vector2 &p_force) override {}
+	virtual Vector2 body_get_constant_force(RID p_body) const override { return Vector2(); }
+
+	virtual void body_set_constant_torque(RID p_body, real_t p_torque) override {}
+	virtual real_t body_get_constant_torque(RID p_body) const override { return 0; }
+
+	virtual void body_set_axis_velocity(RID p_body, const Vector2 &p_axis_velocity) override {}
+
+	virtual void body_add_collision_exception(RID p_body, RID p_body_b) override {}
+	virtual void body_remove_collision_exception(RID p_body, RID p_body_b) override {}
+	virtual void body_get_collision_exceptions(RID p_body, List<RID> *p_exceptions) override {}
+
+	virtual void body_set_max_contacts_reported(RID p_body, int p_contacts) override {}
+	virtual int body_get_max_contacts_reported(RID p_body) const override { return 0; }
+
+	virtual void body_set_contacts_reported_depth_threshold(RID p_body, real_t p_threshold) override {}
+	virtual real_t body_get_contacts_reported_depth_threshold(RID p_body) const override { return 0; }
+
+	virtual void body_set_omit_force_integration(RID p_body, bool p_omit) override {}
+	virtual bool body_is_omitting_force_integration(RID p_body) const override { return false; }
+
+	virtual void body_set_state_sync_callback(RID p_body, const Callable &p_callable) override {}
+	virtual void body_set_force_integration_callback(RID p_body, const Callable &p_callable, const Variant &p_udata = Variant()) override {}
+
+	virtual bool body_collide_shape(RID p_body, int p_body_shape, RID p_shape, const Transform2D &p_shape_xform, const Vector2 &p_motion, Vector2 *r_results, int p_result_max, int &r_result_count) override { return false; }
+
+	virtual void body_set_pickable(RID p_body, bool p_pickable) override {}
+
+	virtual PhysicsDirectBodyState2D *body_get_direct_state(RID p_body) override { return body_state_dummy; }
+
+	virtual bool body_test_motion(RID p_body, const MotionParameters &p_parameters, MotionResult *r_result = nullptr) override { return false; }
+
+	/* JOINT API */
+
+	virtual RID joint_create() override { return RID(); }
+
+	virtual void joint_clear(RID p_joint) override {}
+
+	virtual void joint_set_param(RID p_joint, JointParam p_param, real_t p_value) override {}
+	virtual real_t joint_get_param(RID p_joint, JointParam p_param) const override { return 0; }
+
+	virtual void joint_disable_collisions_between_bodies(RID p_joint, const bool p_disable) override {}
+	virtual bool joint_is_disabled_collisions_between_bodies(RID p_joint) const override { return false; }
+
+	virtual void joint_make_pin(RID p_joint, const Vector2 &p_anchor, RID p_body_a, RID p_body_b = RID()) override {}
+	virtual void joint_make_groove(RID p_joint, const Vector2 &p_a_groove1, const Vector2 &p_a_groove2, const Vector2 &p_b_anchor, RID p_body_a, RID p_body_b) override {}
+	virtual void joint_make_damped_spring(RID p_joint, const Vector2 &p_anchor_a, const Vector2 &p_anchor_b, RID p_body_a, RID p_body_b = RID()) override {}
+
+	virtual void pin_joint_set_param(RID p_joint, PinJointParam p_param, real_t p_value) override {}
+	virtual real_t pin_joint_get_param(RID p_joint, PinJointParam p_param) const override { return 0; }
+
+	virtual void pin_joint_set_flag(RID p_joint, PinJointFlag p_flag, bool p_enabled) override {}
+	virtual bool pin_joint_get_flag(RID p_joint, PinJointFlag p_flag) const override { return false; }
+
+	virtual void damped_spring_joint_set_param(RID p_joint, DampedSpringParam p_param, real_t p_value) override {}
+	virtual real_t damped_spring_joint_get_param(RID p_joint, DampedSpringParam p_param) const override { return 0; }
+
+	virtual JointType joint_get_type(RID p_joint) const override { return JointType::JOINT_TYPE_PIN; }
+
+	/* MISC */
+
+	virtual void free(RID p_rid) override {}
+
+	virtual void set_active(bool p_active) override {}
+	virtual void init() override {
+		space_state_dummy = memnew(PhysicsDirectSpaceState2DDummy);
+		body_state_dummy = memnew(PhysicsDirectBodyState2DDummy(space_state_dummy));
+	}
+	virtual void step(real_t p_step) override {}
+	virtual void sync() override {}
+	virtual void flush_queries() override {}
+	virtual void end_sync() override {}
+	virtual void finish() override {
+		memdelete(body_state_dummy);
+		memdelete(space_state_dummy);
+	}
+
+	virtual bool is_flushing_queries() const override { return false; }
+
+	virtual int get_process_info(ProcessInfo p_info) override { return 0; }
+};
+
+#endif // PHYSICS_SERVER_2D_DUMMY_H

servers/register_server_types.cpp

@@ -81,8 +81,8 @@
 
 // 2D physics and navigation.
 #include "navigation_server_2d.h"
-#include "physics_2d/godot_physics_server_2d.h"
 #include "physics_server_2d.h"
+#include "physics_server_2d_dummy.h"
 #include "physics_server_2d_wrap_mt.h"
 #include "servers/extensions/physics_server_2d_extension.h"
 
@@ -111,16 +111,8 @@ static PhysicsServer3D *_create_dummy_physics_server_3d() {
 }
 #endif // _3D_DISABLED
 
-static PhysicsServer2D *_createGodotPhysics2DCallback() {
+static PhysicsServer2D *_create_dummy_physics_server_2d() {
-#ifdef THREADS_ENABLED
+	return memnew(PhysicsServer2DDummy);
-	bool using_threads = GLOBAL_GET("physics/2d/run_on_separate_thread");
-#else
-	bool using_threads = false;
-#endif
-
-	PhysicsServer2D *physics_server_2d = memnew(GodotPhysicsServer2D(using_threads));
-
-	return memnew(PhysicsServer2DWrapMT(physics_server_2d, using_threads));
 }
 
 static bool has_server_feature_callback(const String &p_feature) {
@@ -281,8 +273,7 @@ void register_server_types() {
 
 	GLOBAL_DEF(PropertyInfo(Variant::STRING, PhysicsServer2DManager::setting_property_name, PROPERTY_HINT_ENUM, "DEFAULT"), "DEFAULT");
 
-	PhysicsServer2DManager::get_singleton()->register_server("GodotPhysics2D", callable_mp_static(_createGodotPhysics2DCallback));
+	PhysicsServer2DManager::get_singleton()->register_server("Dummy", callable_mp_static(_create_dummy_physics_server_2d));
-	PhysicsServer2DManager::get_singleton()->set_default_server("GodotPhysics2D");
 
 	GDREGISTER_ABSTRACT_CLASS(NavigationServer2D);
 	GDREGISTER_CLASS(NavigationPathQueryParameters2D);

tests/scene/test_viewport.h

@@ -38,6 +38,7 @@
 #include "scene/main/canvas_layer.h"
 #include "scene/main/window.h"
 #include "scene/resources/2d/rectangle_shape_2d.h"
+#include "servers/physics_server_2d_dummy.h"
 
 #include "tests/test_macros.h"
 
@@ -1550,6 +1551,12 @@ int TestArea2D::counter = 0;
 TEST_CASE("[SceneTree][Viewport] Physics Picking 2D") {
 	// FIXME: MOUSE_MODE_CAPTURED if-conditions are not testable, because DisplayServerMock doesn't support it.
 
+	// NOTE: This test requires a real physics server.
+	PhysicsServer2DDummy *physics_server_2d_dummy = Object::cast_to<PhysicsServer2DDummy>(PhysicsServer2D::get_singleton());
+	if (physics_server_2d_dummy) {
+		return;
+	}
+
 	struct PickingCollider {
 		TestArea2D *a;
 		CollisionShape2D *c;

tests/test_main.cpp

@@ -174,6 +174,7 @@
 #include "servers/navigation_server_3d.h"
 #endif // _3D_DISABLED
 #include "servers/physics_server_2d.h"
+#include "servers/physics_server_2d_dummy.h"
 #ifndef _3D_DISABLED
 #include "servers/physics_server_3d.h"
 #include "servers/physics_server_3d_dummy.h"
@@ -298,6 +299,9 @@ struct GodotTestCaseListener : public doctest::IReporter {
 #endif // _3D_DISABLED
 
 			physics_server_2d = PhysicsServer2DManager::get_singleton()->new_default_server();
+			if (!physics_server_2d) {
+				physics_server_2d = memnew(PhysicsServer2DDummy);
+			}
 			physics_server_2d->init();
 
 #ifndef _3D_DISABLED