Physics (#3485)

* Content side new physics structure

* BroadPhase outline done

* But we need to fix WorldAABB

* Fix static pvs AABB

* Fix import

* Rando fixes

* B is for balloon

* Change human mob hitbox to circle

* Decent movement

* Start adding friction to player controller

I think it's the best way to go about it to keep other objects somewhat consistent for physics.

* This baby can fit so many physics bugs in it.

* Slight mob mover optimisations.

* Player mover kinda works okay.

* Beginnings of testbed

* More testbed

* Circlestack bed

* Namespaces

* BB fixes

* Pull WorldAABB

* Joint pulling

* Semi-decent movement I guess.

* Pulling better

* Bullet controller + old movement

* im too dumb for this shit

* Use kinematic mob controller again

It's probably for the best TBH

* Stashed shitcode

* Remove SlipController

* In which movement code is entirely refactored

* Singularity fix

* Fix ApplyLinearImpulse

* MoveRelay fix

* Fix door collisions

* Disable subfloor collisions

Saves on broadphase a fair bit

* Re-implement ClimbController

* Zumzum's pressure

* Laggy item throwing

* Minor atmos change

* Some caching

* Optimise controllers

* Optimise CollideWith to hell and back

* Re-do throwing and tile friction

* Landing too

* Optimise controllers

* Move CCVars and other stuff swept is beautiful

* Cleanup a bunch of controllers

* Fix shooting and high pressure movement controller

* Flashing improvements

* Stuff and things

* Combat collisions

* Combat mode collisions

* Pulling distance joint again

* Cleanup physics interfaces

* More like scuffedularity

* Shit's fucked

* Haha tests go green

* Bigmoneycrab

* Fix dupe pulling

* Zumzum's based fix

* Don't run tile friction for non-predicted bodies

* Experimental pulling improvement

* Everything's a poly now

* Optimise AI region debugging a bit

Could still be better but should improve default performance a LOT

* Mover no updater

* Crazy kinematic body idea

* Good collisions

* KinematicController

* Fix aghost

* Throwing refactor

* Pushing cleanup

* Fix throwing and footstep sounds

* Frametime in ICollideBehavior

* Fix stuff

* Actually fix weightlessness

* Optimise collision behaviors a lot

* Make open lockers still collide with walls

* powwweeerrrrr

* Merge master proper

* AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

* AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

* AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

* Ch ch ch changesss

* SHIP IT

* Fix #if DEBUG

* Fix vaulting and item locker collision

* Fix throwing

* Editing yaml by hand what can go wrong

* on

* Last yaml fixes

* Okay now it's fixed

* Linter

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>
Co-authored-by: Vera Aguilera Puerto <zddm@outlook.es>

Content.Server/GameObjects/Components/Projectiles/ProjectileComponent.cs

@@ -5,6 +5,8 @@ using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Projectiles;
 using Robust.Server.GameObjects;
 using Robust.Shared.GameObjects;
+using Robust.Shared.Physics;
+using Robust.Shared.Physics.Collision;
 using Robust.Shared.Players;
 using Robust.Shared.Serialization;
 using Robust.Shared.Serialization.Manager.Attributes;
@@ -13,7 +15,7 @@ using Robust.Shared.ViewVariables;
 namespace Content.Server.GameObjects.Components.Projectiles
 {
     [RegisterComponent]
-    public class ProjectileComponent : SharedProjectileComponent, ICollideBehavior
+    public class ProjectileComponent : SharedProjectileComponent, IStartCollide
     {
         protected override EntityUid Shooter => _shooter;
 
@@ -52,39 +54,27 @@ namespace Content.Server.GameObjects.Components.Projectiles
             Dirty();
         }
 
-        private bool _internalDeleteOnCollide;
-
         /// <summary>
-        /// Applies the damage when our projectile collides with its victim
+        ///     Applies the damage when our projectile collides with its victim
         /// </summary>
-        /// <param name="entity"></param>
-        void ICollideBehavior.CollideWith(IEntity entity)
+        void IStartCollide.CollideWith(IPhysBody ourBody, IPhysBody otherBody, in Manifold manifold)
         {
-            if (_damagedEntity)
-            {
-                return;
-            }
-
             // This is so entities that shouldn't get a collision are ignored.
-            if (entity.TryGetComponent(out IPhysicsComponent otherPhysics) && otherPhysics.Hard == false)
+            if (!otherBody.Hard || _damagedEntity)
             {
-                _internalDeleteOnCollide = false;
                 return;
             }
-            else
+
+            if (otherBody.Entity.TryGetComponent(out IDamageableComponent damage) && _soundHitSpecies != null)
             {
-                _internalDeleteOnCollide = true;
+                EntitySystem.Get<AudioSystem>().PlayAtCoords(_soundHitSpecies, otherBody.Entity.Transform.Coordinates);
+            }
+            else if (_soundHit != null)
+            {
+                EntitySystem.Get<AudioSystem>().PlayAtCoords(_soundHit, otherBody.Entity.Transform.Coordinates);
             }
 
-            if (_soundHitSpecies != null && entity.HasComponent<IDamageableComponent>())
-            {
-                EntitySystem.Get<AudioSystem>().PlayAtCoords(_soundHitSpecies, entity.Transform.Coordinates);
-            } else if (_soundHit != null)
-            {
-                EntitySystem.Get<AudioSystem>().PlayAtCoords(_soundHit, entity.Transform.Coordinates);
-            }
-
-            if (entity.TryGetComponent(out IDamageableComponent damage))
+            if (damage != null)
             {
                 Owner.EntityManager.TryGetEntity(_shooter, out var shooter);
 
@@ -96,17 +86,14 @@ namespace Content.Server.GameObjects.Components.Projectiles
                 _damagedEntity = true;
             }
 
-            if (!entity.Deleted && entity.TryGetComponent(out CameraRecoilComponent recoilComponent)
-                                && Owner.TryGetComponent(out IPhysicsComponent ownPhysics))
+            // Damaging it can delete it
+            if (!otherBody.Entity.Deleted && otherBody.Entity.TryGetComponent(out CameraRecoilComponent recoilComponent))
             {
-                var direction = ownPhysics.LinearVelocity.Normalized;
+                var direction = ourBody.LinearVelocity.Normalized;
                 recoilComponent.Kick(direction);
             }
-        }
 
-        void ICollideBehavior.PostCollide(int collideCount)
-        {
-            if (collideCount > 0 && DeleteOnCollide && _internalDeleteOnCollide) Owner.Delete();
+            Owner.Delete();
         }
 
         public override ComponentState GetComponentState(ICommonSession player)