Physics (#3452)

* 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

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Shared/GameObjects/Components/Movement/SharedSlipperyComponent.cs

@@ -3,10 +3,12 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.EntitySystems.ActionBlocker;
 using Content.Shared.GameObjects.EntitySystems.EffectBlocker;
 using Content.Shared.Physics;
 using Robust.Shared.Containers;
 using Robust.Shared.GameObjects;
+using Robust.Shared.Physics;
 using Robust.Shared.Serialization;
 using Robust.Shared.ViewVariables;
 
@@ -53,14 +55,12 @@ namespace Content.Shared.GameObjects.Components.Movement
         [ViewVariables(VVAccess.ReadWrite)]
         public virtual bool Slippery { get; set; }
 
-        private bool TrySlip(IEntity entity)
+        private bool TrySlip(IPhysBody ourBody, IPhysBody otherBody)
         {
             if (!Slippery
                 || Owner.IsInContainer()
-                ||  _slipped.Contains(entity.Uid)
-                ||  !entity.TryGetComponent(out SharedStunnableComponent? stun)
-                ||  !entity.TryGetComponent(out IPhysicsComponent? otherBody)
-                ||  !Owner.TryGetComponent(out IPhysicsComponent? body))
+                ||  _slipped.Contains(otherBody.Entity.Uid)
+                ||  !otherBody.Entity.TryGetComponent(out SharedStunnableComponent? stun))
             {
                 return false;
             }
@@ -70,26 +70,22 @@ namespace Content.Shared.GameObjects.Components.Movement
                 return false;
             }
 
-            var percentage = otherBody.WorldAABB.IntersectPercentage(body.WorldAABB);
+            var percentage = otherBody.GetWorldAABB().IntersectPercentage(ourBody.GetWorldAABB());
 
             if (percentage < IntersectPercentage)
             {
                 return false;
             }
 
-            if (!EffectBlockerSystem.CanSlip(entity))
+            if (!EffectBlockerSystem.CanSlip(otherBody.Entity))
             {
                 return false;
             }
 
-            if (entity.TryGetComponent(out IPhysicsComponent? physics))
-            {
-                var controller = physics.EnsureController<SlipController>();
-                controller.LinearVelocity = physics.LinearVelocity * LaunchForwardsMultiplier;
-            }
+            otherBody.LinearVelocity *= LaunchForwardsMultiplier;
 
             stun.Paralyze(5);
-            _slipped.Add(entity.Uid);
+            _slipped.Add(otherBody.Entity.Uid);
 
             OnSlip();
 
@@ -98,9 +94,9 @@ namespace Content.Shared.GameObjects.Components.Movement
 
         protected virtual void OnSlip() { }
 
-        public void CollideWith(IEntity collidedWith)
+        public void CollideWith(IPhysBody ourBody, IPhysBody otherBody)
         {
-            TrySlip(collidedWith);
+            TrySlip(ourBody, otherBody);
         }
 
         public void Update()
@@ -114,10 +110,10 @@ namespace Content.Shared.GameObjects.Components.Movement
                 }
 
                 var entity = Owner.EntityManager.GetEntity(uid);
-                var physics = Owner.GetComponent<IPhysicsComponent>();
-                var otherPhysics = entity.GetComponent<IPhysicsComponent>();
+                var physics = Owner.GetComponent<IPhysBody>();
+                var otherPhysics = entity.GetComponent<IPhysBody>();
 
-                if (!physics.WorldAABB.Intersects(otherPhysics.WorldAABB))
+                if (!physics.GetWorldAABB().Intersects(otherPhysics.GetWorldAABB()))
                 {
                     _slipped.Remove(uid);
                 }
@@ -132,12 +128,12 @@ namespace Content.Shared.GameObjects.Components.Movement
 
             physics.Hard = false;
 
-            var shape = physics.PhysicsShapes.FirstOrDefault();
+            var fixtures = physics.Fixtures.FirstOrDefault();
 
-            if (shape != null)
+            if (fixtures != null)
             {
-                shape.CollisionLayer |= (int) CollisionGroup.SmallImpassable;
-                shape.CollisionMask = (int) CollisionGroup.None;
+                fixtures.CollisionLayer |= (int) CollisionGroup.SmallImpassable;
+                fixtures.CollisionMask = (int) CollisionGroup.None;
             }
         }