[TRACKER] GodotPhysics 2D issues

[pouleyKetchoupp]

This tracker is for all physics issues that affect Godot Physics 2D.

Note: Issues that are reported on both 2D and 3D are listed here and in #45333.

RigidBody

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1. Pile of RigidBody2Ds results in overlapping and shaking #2092
   bug confirmed topic:physics +3
   
2. RigidBody2D ignores set_position when switching between MODE_RIGID and MODE_STATIC/KINEMATIC #10959
   bug confirmed topic:physics +3
3. Inconsistent execution order of _integrate_forces #11925
   bug confirmed topic:physics +3
4. RigidBody2D#test_motion behaving weird #16414
   bug confirmed discussion topic:physics +4
5. Collisions of RigidBody2D are offsetted when moving. #20105
   bug confirmed topic:physics +3
   
6. 2D PhysicsMaterial bounce > 0, constantly agitated/vibrating when they should be at rest #25186
   bug confirmed topic:physics +3
7. RigidBody2D passes through walls/objects when pushed by a KinematicBody2D #27652
   bug confirmed topic:physics +3
8. [Bullet] RigidBody2D bounces when passing on top of two perfectly aligned StaticBody2Ds #28438
   bug confirmed topic:physics +3
9. Rigid bodies using inertia become unstable. #29303
   bug confirmed topic:physics +3
10. Colliding objects (RigidBody2d) gain energy #29639
    bug confirmed topic:physics +3
11. can't use Rigigbody2D's apply_impulse and apply_torque_impulse when in _ready() function #29888
    bug topic:physics +2
12. Bumpy issue when dealing with moving platforms and Animation Player #32158
    bug confirmed discussion topic:core topic:physics usability +6
13. 2D Physics Collision is 'Squishy' #34215
    bug topic:physics +2
14. RigidBody2D rotates on collision in 3.2, works fine in 3.1 #35514
    discussion topic:physics +2
15. RigidBody2D tunnels CollisionShape2D and bounces back with even greater momentum #36294
    bug topic:physics +2
16. KinematicBody2D pushes RigidBody2D through the ground when standing on them #37427
    bug confirmed topic:physics +3
17. RigidBody2D does not clear forces at end of integration, RigidBody does #38646
    bug topic:physics +2
    
18. Physics2D weird CollisionPolygon2D interaction with 3 consecutive points on the same line #38780
    bug confirmed topic:physics +3
19. RigidBody2D and moving platforms #40495
    bug topic:physics +2
20. RigidBody2D cannot rotate after CollisionShape2D is disabled #41024
    bug confirmed topic:physics +3
21. Bounce property of RigidBody2D physics material is ignored after saving scene #45331
    bug confirmed topic:physics +3
22. RigidBody2D gets stuck while moving parallel in contact with multiple floors/walls #47148
    bug confirmed topic:2d topic:physics +4
23. RigidBody2D bounces/glitches periodically with torque against moving KinematicBody2D #47817
    bug topic:physics +2
24. RigidBody gains momentum with each collision when bounce = 1 (both 2D and 3D, Bullet and GodotPhysics) #52550
    bug topic:physics +2

KinematicBody/CharacterBody

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1. KinematicBody2D.move result in weird movement between KinematicBody2D #8757
   bug confirmed discussion topic:physics +4
2. KinematicBody/2D uses any combination of layer-mask for move_* collision detection #15243
   discussion documentation topic:physics +3
3. KinematicBody2D using move_and_collide makes other colliding KinematicBody2D move #21560
   enhancement topic:physics +2
4. Kinematic body does not move when exactly in between two static bodies #23140
   bug documentation topic:physics +3
5. Inconsistent floor collision #24050
   bug topic:2d topic:physics +3
6. Kinematic bodies having collision normal problems against other Kinematic bodies. #24335
   bug confirmed topic:physics +3
7. [2D physics] Random flipping of sprite when rotated. #25759
   bug topic:core topic:physics +3
8. Experimenting with gravity and moving platforms, head gets stuck #27537
   bug confirmed topic:physics +3
9. 2D KinematicBody slides down slope with move_and_slide_with_snap #31097
   bug topic:physics +2
10. KinematicBody2D can push other KinematicBody2D #34345
    bug confirmed discussion topic:physics +4
11. KinematicBody2D Will Suddenly Launch RigidBody2D #34869
    bug topic:2d topic:physics +3
12. Joint2D doesn't react to KinematicBody2D #35275
    bug confirmed topic:physics +3
13. KinematicCollision2D is overriden even though the variable isn't reassigned #36290
    bug confirmed topic:physics +3
14. Collision detection not always working using move_and_collide on KinematicBody2D with save_margin at 0.001 #36432
    bug confirmed regression topic:physics +4
15. Player KinematicBody2D (using Rayshape2D and move_and_slide) make moving platform(using move_and_collide) drop down slowly together. #36500
    bug topic:physics +2
16. Jitter in projects #37118
    bug topic:physics topic:rendering +3
17. KinematicBody2D passing through tile when there is one cell between parallel tiles #37798
    bug confirmed topic:physics +3
18. move_and_slide properties in visual script disable the collision detection . . #38247
    bug topic:physics +2
19. CircleShape2D weird behavior with Moving Platforms #40256
    bug topic:physics +2
20. RigidBody2D isn't detecting every collision #40526
    bug topic:physics +2
21. KinematicBody2D: odd move_and_slide behaviour when exactly on tile edge #44882
    bug confirmed topic:2d topic:physics +4
22. KinematicBody2D slides with move_and_collide #45004
    bug confirmed topic:physics +3
23. 2D platform physics collision jitter #45259
    bug confirmed regression topic:physics +4
    
24. KinematicBody2D collision detection occurs depending on movement of it and the collider #46513
    bug confirmed topic:2d topic:physics +4
25. KinematicBody2D is_on_floor() and is_on_wall() are refusing to return true on the same frame when using small vector values #46634
    bug confirmed topic:physics +3
26. Collision result prioritizes nearest point rather than the length of the collided size #46746
    bug topic:2d topic:physics +3
27. Body stuck when a moving platform goes up (especially if the collision is a tilemap) #47366
    bug topic:2d topic:physics +3
28. Spherical KinematicBody2D gets stuck under moving platforms #49387
    bug confirmed topic:2d topic:physics +4
29. KinematicBody2D doesnt move with platform if it has another KinematicBody2D on top of it. #49497
    bug confirmed topic:2d topic:physics +4

One-way collision

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1. One-way collision shape does not work with KinematicBody2D #25313
   bug confirmed topic:2d topic:physics +4
2. KinematicBody2D and RayCastShape2D doesn't work on One Way Collision #27689
   bug confirmed topic:physics +3
3. One way platforms don't have consistent collision on edge #28895
   bug confirmed topic:physics +3
4. CollisionPolygon2D bug with one way collision #38675
   bug topic:2d topic:physics +3
5. move_and_slide causes unexpected slide on edge of fast moving platforms #42765
   bug confirmed topic:physics +3
6. Moving through one way platforms jumps KinematicBody2D by one way margins #42914
   bug confirmed topic:physics +3
7. KinematicBody2D doesn't collide with one way platforms on corners in certain cases #42916
   bug confirmed topic:physics +3
8. A KinematicBody2D can push another KinematicBody2D through a moving one-way collision platform #43229
   bug confirmed topic:physics +3
9. KinematicBody2D doesn't collide with group of one way collision bodies #43346
   bug topic:physics +2
10. Vertical collision with one way collision platform when colliding with another body to the side #43973
    bug confirmed topic:physics +3

Sync to Physics

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1. KinematicBody collision doesn't update when parent moves and Sync To Physics is enabled #43236
   bug confirmed topic:physics +3
2. KinematicBody2D isn't moved by RemoteTransform2D if "sync to physics" is enabled, and the RemoteTransform2D doesn't update scale or rotation #43834
   bug confirmed topic:physics +3
3. Unexpected behavior when setting position of KinematicBody2D with Sync to Physics enabled #45483
   bug topic:physics +2

Smooth steps

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1. Godot 3.2.3 move_and_slide_with_snap() doesn't function correctly at 144fps. #43368
   topic:physics +1
2. 2D physics objects have delay to their positions #43800
   bug topic:physics +2

Collision detection

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1. RigidBody and RigidBody2D ignore scaling on runtime #5734
   bug confirmed topic:physics +3
2. Continuous CD not working #9071
   bug confirmed topic:physics +3
3. Issue with flipping 2D characters (non uniform scaling) #12335
   discussion topic:physics +2
4. ERROR: set_data: Condition ' len % 2 ' is true #19353
   bug topic:physics +2
5. RigidBody2D won't detect collision sometimes when colliding with 2 StaticBody2D #20576
   bug confirmed topic:physics +3
6. Collision signals don't work on static and rigid RigidBody2D but do work between rigid and kinematic RigidBody2D #23042
   bug confirmed topic:physics +3
   
7. Unexpected behavior when setting negative scale in KinematicBody2D #24663
   discussion topic:physics +2
8. Incorrect bounce angle of RigidBody2D when using the Cast Ray Continuous Cd mode #32138
   bug confirmed topic:2d topic:physics +4
9. Ray slows down before the collision #39653
   bug topic:physics +2
10. Rotation/Scale/Translation mixes on CollisionShapes not consistently resulting in correct collision #41685
    confirmed documentation enhancement topic:physics +4
11. RigidBody2D sometimes reports incorrect collision normal #43014
    bug topic:physics +2
12. Area2D's signals *_entered and *_exited do not fire predictably during movement dependent on speed and size. #43743
    bug confirmed topic:physics +3
13. changing collision shape dynamically in _process delays detection #44348
    bug confirmed topic:physics +3
14. Weird collision solving using RigidBody2D and ConvexPolygonShape2D #49806
    archived documentation topic:physics +3
15. 2D collision pair contacts are not drawn and/or invalid contacts are drawn as well #53486
    bug topic:2d topic:physics +3
16. Physics_Body2D.get_collision_exceptions() fails for freed objects #53520
    bug topic:physics +2

Area

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1. Area2D does not report input events if it is not in a collision layer #11159
   bug topic:input topic:physics +3
2. Physics2DServer doesn't send body info to signals #12215
   bug confirmed topic:physics +3
3. Changing node parent produces Area2D/3D signal duplicates #14578
   bug confirmed topic:physics +3
4. Area3D/Area2D doesn't detect static bodies if "Monitorable" is disabled #17238
   bug confirmed topic:physics +3
5. Changing Area2D shape causes resend of body_exited and body_entered for enclosed body #19271
   bug confirmed topic:physics +3
6. Area2D doesn't update its overlapping areas when monitorable changes in the areas it's overlapping #23484
   bug topic:physics +2
7. area_entered, area_exited occurs at the same time with Area2D #25331
   enhancement topic:physics +2
   
8. Area2D duplicate signal when changing CollisionPolygon2D Polygon property #25769
   bug confirmed topic:physics +3
9. Area2D/3D monitoring and monitorable are not working according to docs #27441
   bug documentation topic:physics +3
10. Changing radius of RigidBody2D's shape ignores Area2D gravity #33766
    bug confirmed documentation topic:physics +4
11. Duplicate collision detection when re-instancing Area2D nodes #34085
    bug discussion topic:physics +3
12. Raycast can collide with area even if monitorable property is set to false #41155
    discussion topic:physics +2
13. Area2D signals area_entered and body_entered not firing on same frame #41648
    bug topic:physics +2
14. regression in Area2D monitoring which results in callbacks missing #44632
    bug regression topic:physics +3
15. Area2D prints an error when the node is removed from the scene tree during a mouse_entered or mouse_exited method call #52371
    bug topic:input topic:physics +3
16. Area2D entered/exit signals more than 1 frame late with KinematicBody #53099
    bug topic:2d topic:physics +3
17. Setting collision layer/mask after the collision doesn't trigger entered signal #53997
    bug confirmed regression topic:physics +4

Joints

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1. Time scale affects PinJoint2D's softness #5418
   archived bug topic:physics +3
2. PinJoint2D unpins when parent node moved #31711
   bug confirmed topic:physics +3
3. Pin Joints throw errors when freed. #38434
   bug topic:physics +2

Raycasting

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1. intersect_ray() result normal can be inverted or length 0. #35845
   bug topic:physics +2
2. RayCast2D will not collide with TileMap if it's fully inside tile #36259
   bug topic:physics +2
3. Intersect ray hit RID is different each time? #36824
   bug discussion topic:physics +3
4. Inconsistent RayCast2D collision results for different shapes #38343
   bug topic:physics +2
5. RayCast2D and CollisionPolygon2D collisions are unreliable #38873
   bug topic:physics +2
6. Raycast2d does not collide with CircleShape2d in CollisionShape2d, but does work with RectangleShape2d. #39859
   bug confirmed topic:physics +3
7. Raycasts inside Tilemaps only collide at the edge. #44003
   bug topic:physics +2
8. Raycast2D can't detect a collision when a moving platform does down quickly. #50465
   bug topic:2d topic:physics +3

TileMap

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1. Collision exceptions don't work with TileMap node #17090
   confirmed enhancement topic:2d topic:physics +4
2. Area2D reports TileMap in the signals, when collide with the tiles #24739
   bug confirmed topic:physics +3
   
3. Moving platform with tilemap does not working properly #35550
   archived bug topic:physics +3
4. Tilemap: set_cellv(map_point, -1) does not work with Ysort #38297
   bug topic:physics +2
5. Physics2DDirectSpaceState.insersect_point() does not exclude TileMaps passed in the exclude parameter #41245
   bug topic:physics +2
6. Phantom tilemap collisions breaking game #43306
   bug topic:physics +2
7. Changing a TileSet while project is running breaks Area2D collision #45633
   discussion topic:core topic:physics +3
8. Tilemap collision is not updated right away when changing tile (update done in the next collision resolution step) #48397
   bug topic:2d topic:core topic:physics +4
9. cell_y_sort == true in TileMap breaks body_shape on collision with Area2D #48603
   bug confirmed topic:2d topic:physics +4
10. One-way collisions in tilemap can't be modified after the game has been started once #53801
    bug confirmed topic:2d topic:physics +4

Multi-threading

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1. Test_move in KinematicBody2D cause game crash #29364
   bug crash topic:physics +3
2. Crash in destructor AreaPair2DSW with Multi-Threaded physics #29369
   bug crash topic:physics +3
3. Infinite loop in Physics2DServerSW::_update_shapes with Multi-Threaded physics #35017
   bug confirmed needs testing topic:2d topic:physics +5
4. Area2D can crash with multi-threaded physics #50470
   bug crash topic:2d topic:physics +4

Other

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1. CollisionObject2D _input_event ignores pause mode #3703
   bug confirmed topic:input topic:physics +4
2. Undefined propagation order for clicks on overlapped CollisionShape2D #23051
   bug confirmed topic:2d topic:input topic:physics +5
3. Physics is not deterministic when using time scale. #24334
   discussion topic:physics +2
4. Area2D mouse_entered and mouse_exited signals not called in Viewport #26181
   archived confirmed discussion documentation topic:physics +5
   
5. Difficult to work with Area2D/PhysicsBody2D in C# due to duplicated code in Godot Engine #26680
   enhancement topic:core topic:physics +3
6. Collider returns an Object. no access to .Name #28318
   enhancement topic:core topic:dotnet topic:physics +4
7. Export project crashes only when exporting without "Export with debug" option #28922
   archived bug crash topic:core topic:physics +5
8. Inconsistent physics delta #31016
   archived discussion topic:physics +3
9. CollisionObject2D nodes inside CanvasLayer with FollowViewport enabled are not affected by movement #35052
   archived bug confirmed topic:physics +4
10. Collision shapes created through CollisionObject2D APIs are not visible #36499
    enhancement topic:2d topic:physics +3
11. Trying to have composite rigidbodies 2D and imprecision issues with linear velocity. #38339
    archived topic:physics +2
12. WARNING: cleanup: ObjectDB Instances still exist! when using GetWorld2d().DirectSpaceState #39216
    bug confirmed platform:windows topic:dotnet topic:physics +5
13. GodotPhysics performance when interacting with servers directly #45360
    discussion topic:physics +2
14. Colliding Rigidbody2Ds cause FPS drop even if their masks/layers don't match #45824
    bug topic:physics +2
15. Executing collide function in ConvexPolygonShape2D crashes Godot #46137
    bug crash good first issue topic:physics +4
16. Unknown global transform when Particles2D is set to false for local coordinates and connected to PhysicsBody2D #46933
    bug confirmed topic:2d topic:particles topic:physics +5
17. Crash when using create_shape_owner and shape_owner_get_owner #47135
    bug crash topic:physics +3
18. Crash when adding physics nodes with collision shapes #47436
    bug confirmed crash topic:physics +4
19. Several physics related crashes when running test project #47440
    bug crash topic:physics +3
20. Data races when adding and removing nodes(Area2D, RigidBody2D) with physics multi threading #47489
    bug crash topic:physics +3
21. Rigidbody2D jitters on FPS drops #48128
    archived topic:physics +2
22. Separate Viewport/World2D with another viewport sharing the World2D causes physics errors, no rendering #52423
    bug topic:2d topic:physics topic:rendering +4

Editor

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1. Collision layer name doesn't update in the inspector when changed #29991
   bug confirmed topic:editor topic:physics +4
2. Creating a CollisionPolygon2D from a Sprite has an incorrect offset is done from a Sprite with Region enabled #43887
   bug confirmed topic:editor topic:physics +4
3. Physics 2D and 3D layer/mask in tscn file can include layers above 20 #45536
   bug discussion topic:editor topic:physics usability +5
4. Convex decomposing failed with CollisionPolygon2D PackedVector2Array size < 3 #45724
   bug confirmed topic:2d topic:core topic:editor topic:physics +6

Documentation

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1. KinematicBody2D: test_move breaks when parent is offset from (0, 0) #26003
   documentation topic:physics +2
2. Documentation is unclear on how to move a RigidBody2D in Kinematic mode #30824
   documentation enhancement topic:physics +3
3. Area2Ds ignore CollisionShape2D.one_way_collision #31564
   discussion documentation topic:physics +3
4. test_motion doesn't return collision with other RigidBody2D #43202
   documentation topic:physics +2
5. PhysicsShapeQueryParameters2D collision_layer property is actually collision_mask #44622
   archived bug documentation topic:physics +4
6. Area2D erroneously emits body_entered signal if collision mask *and* layer are reset. #45131
   documentation topic:physics +2
7. Physics documentation should teach users to set parameters before adding nodes #45638
   documentation enhancement topic:physics +3
8. Pause mode enabled stops body/area signals being raised on a scene that has pause mode set as Process #47326
   documentation enhancement topic:physics +3
9. PhysicsMaterial needs better documentation for friction and bounce #48461
   documentation topic:physics +2
10. Shape2D.collide_and_get_contacts returns incorrect contact points between convex polygon and line segment #48520
    documentation topic:physics +2
11. Changing RigidBody2D mode propery doesn't work from inside Area2D body_entered signals #50876
    documentation topic:physics +2

4.0 refactoring

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1. Center of mass for RigidBody2D #12353
   bug confirmed topic:physics +3
2. Shouldn't PhysicsMaterial properties correspond to individual shapes rather than the body? #25254
   archived discussion topic:physics +3
3. move_and_slide() takes in velocity, while move_and_collide() takes in position offset #30029
   discussion topic:physics +2
4. Physics2DServer.set_active(false) doesn't work #46158
   documentation enhancement topic:physics +3
5. PhysicsDirectSpaceState2D get_rest_info returned dictionary should also contain a field for the actual collision object #49591
   documentation topic:physics +2