Physics Based Air Throws

Content.Server/Atmos/EntitySystems/AtmosphereSystem.CVars.cs

@@ -12,9 +12,14 @@ public sealed partial class AtmosphereSystem
         public float SpaceWindPressureForceDivisorPush { get; private set; }
         public float SpaceWindMaxVelocity { get; private set; }
         public float SpaceWindMaxPushForce { get; private set; }
+        public float SpaceWindMinimumCalculatedMass { get; private set; }
+        public float SpaceWindMaximumCalculatedInverseMass { get; private set; }
+        public bool MonstermosUseExpensiveAirflow { get; private set; }
         public bool MonstermosEqualization { get; private set; }
         public bool MonstermosDepressurization { get; private set; }
         public bool MonstermosRipTiles { get; private set; }
+        public float MonstermosRipTilesMinimumPressure { get; private set; }
+        public float MonstermosRipTilesPressureOffset { get; private set; }
         public bool GridImpulse { get; private set; }
         public float SpacingEscapeRatio { get; private set; }
         public float SpacingMinGas { get; private set; }
@@ -26,6 +31,7 @@ public sealed partial class AtmosphereSystem
         public float AtmosTickRate { get; private set; }
         public float Speedup { get; private set; }
         public float HeatScale { get; private set; }
+        public float HumanoidThrowMultiplier { get; private set; }
 
         /// <summary>
         /// Time between each atmos sub-update.  If you are writing an atmos device, use AtmosDeviceUpdateEvent.dt
@@ -41,9 +47,14 @@ private void InitializeCVars()
             Subs.CVar(_cfg, CCVars.SpaceWindPressureForceDivisorPush, value => SpaceWindPressureForceDivisorPush = value, true);
             Subs.CVar(_cfg, CCVars.SpaceWindMaxVelocity, value => SpaceWindMaxVelocity = value, true);
             Subs.CVar(_cfg, CCVars.SpaceWindMaxPushForce, value => SpaceWindMaxPushForce = value, true);
+            Subs.CVar(_cfg, CCVars.SpaceWindMinimumCalculatedMass, value => SpaceWindMinimumCalculatedMass = value, true);
+            Subs.CVar(_cfg, CCVars.SpaceWindMaximumCalculatedInverseMass, value => SpaceWindMaximumCalculatedInverseMass = value, true);
+            Subs.CVar(_cfg, CCVars.MonstermosUseExpensiveAirflow, value => MonstermosUseExpensiveAirflow = value, true);
             Subs.CVar(_cfg, CCVars.MonstermosEqualization, value => MonstermosEqualization = value, true);
             Subs.CVar(_cfg, CCVars.MonstermosDepressurization, value => MonstermosDepressurization = value, true);
             Subs.CVar(_cfg, CCVars.MonstermosRipTiles, value => MonstermosRipTiles = value, true);
+            Subs.CVar(_cfg, CCVars.MonstermosRipTilesMinimumPressure, value => MonstermosRipTilesMinimumPressure = value, true);
+            Subs.CVar(_cfg, CCVars.MonstermosRipTilesPressureOffset, value => MonstermosRipTilesPressureOffset = value, true);
             Subs.CVar(_cfg, CCVars.AtmosGridImpulse, value => GridImpulse = value, true);
             Subs.CVar(_cfg, CCVars.AtmosSpacingEscapeRatio, value => SpacingEscapeRatio = value, true);
             Subs.CVar(_cfg, CCVars.AtmosSpacingMinGas, value => SpacingMinGas = value, true);
@@ -55,6 +66,7 @@ private void InitializeCVars()
             Subs.CVar(_cfg, CCVars.AtmosHeatScale, value => { HeatScale = value; InitializeGases(); }, true);
             Subs.CVar(_cfg, CCVars.ExcitedGroups, value => ExcitedGroups = value, true);
             Subs.CVar(_cfg, CCVars.ExcitedGroupsSpaceIsAllConsuming, value => ExcitedGroupsSpaceIsAllConsuming = value, true);
+            Subs.CVar(_cfg, CCVars.AtmosHumanoidThrowMultiplier, value => HumanoidThrowMultiplier = value, true);
         }
     }
 }

Content.Server/Atmos/EntitySystems/AtmosphereSystem.HighPressureDelta.cs

@@ -1,5 +1,6 @@
 using Content.Server.Atmos.Components;
 using Content.Shared.Atmos;
+using Content.Shared.Humanoid;
 using Content.Shared.Mobs.Components;
 using Content.Shared.Physics;
 using Robust.Shared.Audio;
@@ -49,8 +50,7 @@ private void UpdateHighPressure(float frameTime)
                 comp.Accumulator = 0f;
                 toRemove.Add(ent);
 
-                if (HasComp<MobStateComponent>(uid) &&
-                    TryComp<PhysicsComponent>(uid, out var body))
+                if (TryComp<PhysicsComponent>(uid, out var body))
                 {
                     _physics.SetBodyStatus(uid, body, BodyStatus.OnGround);
                 }
@@ -70,27 +70,10 @@ private void UpdateHighPressure(float frameTime)
             }
         }
 
-        private void AddMobMovedByPressure(EntityUid uid, MovedByPressureComponent component, PhysicsComponent body)
-        {
-            if (!TryComp<FixturesComponent>(uid, out var fixtures))
-                return;
-
-            _physics.SetBodyStatus(uid, body, BodyStatus.InAir);
-
-            foreach (var (id, fixture) in fixtures.Fixtures)
-            {
-                _physics.RemoveCollisionMask(uid, id, fixture, (int) CollisionGroup.TableLayer, manager: fixtures);
-            }
-
-            // TODO: Make them dynamic type? Ehh but they still want movement so uhh make it non-predicted like weightless?
-            // idk it's hard.
-
-            component.Accumulator = 0f;
-            _activePressures.Add((uid, component));
-        }
-
         private void HighPressureMovements(Entity<GridAtmosphereComponent> gridAtmosphere, TileAtmosphere tile, EntityQuery<PhysicsComponent> bodies, EntityQuery<TransformComponent> xforms, EntityQuery<MovedByPressureComponent> pressureQuery, EntityQuery<MetaDataComponent> metas)
         {
+            if (tile.PressureDifference < SpaceWindMinimumCalculatedMass * SpaceWindMinimumCalculatedMass)
+                return;
             // TODO ATMOS finish this
 
             // Don't play the space wind sound on tiles that are on fire...
@@ -120,7 +103,8 @@ private void HighPressureMovements(Entity<GridAtmosphereComponent> gridAtmospher
             var gridWorldRotation = xforms.GetComponent(gridAtmosphere).WorldRotation;
 
             // If we're using monstermos, smooth out the yeet direction to follow the flow
-            if (MonstermosEqualization)
+            //TODO This is bad, don't run this. It just makes the throws worse by somehow rounding them to orthogonal
+            if (!MonstermosEqualization)
             {
                 // We step through tiles according to the pressure direction on the current tile.
                 // The goal is to get a general direction of the airflow in the area.
@@ -160,7 +144,7 @@ private void HighPressureMovements(Entity<GridAtmosphereComponent> gridAtmospher
                         (entity, pressureMovements),
                         gridAtmosphere.Comp.UpdateCounter,
                         tile.PressureDifference,
-                        tile.PressureDirection, 0,
+                        tile.PressureDirection,
                         tile.PressureSpecificTarget != null ? _mapSystem.ToCenterCoordinates(tile.GridIndex, tile.PressureSpecificTarget.GridIndices) : EntityCoordinates.Invalid,
                         gridWorldRotation,
                         xforms.GetComponent(entity),
@@ -181,12 +165,29 @@ private void ConsiderPressureDifference(GridAtmosphereComponent gridAtmosphere,
             tile.PressureDirection = differenceDirection;
         }
 
+        //INFO The EE version of this function drops pressureResistanceProbDelta, since it's not needed. If you are for whatever reason calling this function
+        //INFO And if it isn't working, you've probably still got the pressureResistanceProbDelta line included.
+        /// <notes>
+        /// EXPLANATION:
+        /// pressureDifference = Force of Air Flow on a given tile
+        /// physics.Mass = Mass of the object potentially being thrown
+        /// physics.InvMass = 1 divided by said Mass. More CPU efficient way to do division.
+        ///
+        /// Objects can only be thrown if the force of air flow is greater than the SQUARE of their mass or {SpaceWindMinimumCalculatedMass}, whichever is heavier
+        /// This means that the heavier an object is, the exponentially more force is required to move it
+        /// The force of a throw is equal to the force of air pressure, divided by an object's mass. So not only are heavier objects
+        /// less likely to be thrown, they are also harder to throw,
+        /// while lighter objects are yeeted easily, and from great distance.
+        ///
+        /// For a human sized entity with a standard weight of 80kg and a spacing between a hard vacuum and a room pressurized at 101kpa,
+        /// The human shall only be moved if he is either very close to the hole, or is standing in a region of high airflow
+        /// </notes>
+
         public void ExperiencePressureDifference(
             Entity<MovedByPressureComponent> ent,
             int cycle,
             float pressureDifference,
             AtmosDirection direction,
-            float pressureResistanceProbDelta,
             EntityCoordinates throwTarget,
             Angle gridWorldRotation,
             TransformComponent? xform = null,
@@ -199,50 +200,28 @@ public void ExperiencePressureDifference(
             if (!Resolve(uid, ref xform))
                 return;
 
-            // TODO ATMOS stuns?
-
-            var maxForce = MathF.Sqrt(pressureDifference) * 2.25f;
-            var moveProb = 100f;
 
-            if (component.PressureResistance > 0)
-                moveProb = MathF.Abs((pressureDifference / component.PressureResistance * MovedByPressureComponent.ProbabilityBasePercent) -
-                                     MovedByPressureComponent.ProbabilityOffset);
-
-            // Can we yeet the thing (due to probability, strength, etc.)
-            if (moveProb > MovedByPressureComponent.ProbabilityOffset && _robustRandom.Prob(MathF.Min(moveProb / 100f, 1f))
-                                                                      && !float.IsPositiveInfinity(component.MoveResist)
-                                                                      && (physics.BodyType != BodyType.Static
-                                                                          && (maxForce >= (component.MoveResist * MovedByPressureComponent.MoveForcePushRatio)))
-                || (physics.BodyType == BodyType.Static && (maxForce >= (component.MoveResist * MovedByPressureComponent.MoveForceForcePushRatio))))
+            if (physics.BodyType != BodyType.Static
+                && !float.IsPositiveInfinity(component.MoveResist))
             {
-                if (HasComp<MobStateComponent>(uid))
+                var moveForce = pressureDifference * MathF.Max(physics.InvMass, SpaceWindMaximumCalculatedInverseMass);
+                if (HasComp<HumanoidAppearanceComponent>(ent))
+                    moveForce *= HumanoidThrowMultiplier;
+                if (moveForce > physics.Mass)
                 {
-                    AddMobMovedByPressure(uid, component, physics);
-                }
-
-                if (maxForce > MovedByPressureComponent.ThrowForce)
-                {
-                    var moveForce = maxForce;
-                    moveForce /= (throwTarget != EntityCoordinates.Invalid) ? SpaceWindPressureForceDivisorThrow : SpaceWindPressureForceDivisorPush;
-                    moveForce *= MathHelper.Clamp(moveProb, 0, 100);
-
-                    // Apply a sanity clamp to prevent being thrown through objects.
-                    var maxSafeForceForObject = SpaceWindMaxVelocity * physics.Mass;
-                    moveForce = MathF.Min(moveForce, maxSafeForceForObject);
-
                     // Grid-rotation adjusted direction
                     var dirVec = (direction.ToAngle() + gridWorldRotation).ToWorldVec();
+                    moveForce *= MathF.Max(physics.InvMass, SpaceWindMaximumCalculatedInverseMass);
 
-                    // TODO: Technically these directions won't be correct but uhh I'm just here for optimisations buddy not to fix my old bugs.
+                    //TODO Consider replacing throw target with proper trigonometry angles.
                     if (throwTarget != EntityCoordinates.Invalid)
                     {
-                        var pos = ((throwTarget.ToMap(EntityManager, _transformSystem).Position - xform.WorldPosition).Normalized() + dirVec).Normalized();
-                        _physics.ApplyLinearImpulse(uid, pos * moveForce, body: physics);
+                        var pos = throwTarget.ToMap(EntityManager, _transformSystem).Position - xform.WorldPosition + dirVec;
+                        _throwing.TryThrow(uid, pos.Normalized() * MathF.Min(moveForce, SpaceWindMaxVelocity), moveForce);
                     }
                     else
                     {
-                        moveForce = MathF.Min(moveForce, SpaceWindMaxPushForce);
-                        _physics.ApplyLinearImpulse(uid, dirVec * moveForce, body: physics);
+                        _throwing.TryThrow(uid, dirVec.Normalized() * MathF.Min(moveForce, SpaceWindMaxVelocity), moveForce);
                     }
 
                     component.LastHighPressureMovementAirCycle = cycle;

Content.Server/Atmos/EntitySystems/AtmosphereSystem.Monstermos.cs

@@ -5,11 +5,13 @@
 using Content.Shared.Atmos;
 using Content.Shared.Atmos.Components;
 using Content.Shared.Database;
+using Content.Shared.Maps;
+using Robust.Shared.Map;
 using Robust.Shared.Map.Components;
 using Robust.Shared.Physics.Components;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Random;
 using Robust.Shared.Utility;
-
 namespace Content.Server.Atmos.EntitySystems
 {
     public sealed partial class AtmosphereSystem
@@ -137,7 +139,7 @@ private void EqualizePressureInZone(
             var logN = MathF.Log2(tileCount);
 
             // Optimization - try to spread gases using an O(n log n) algorithm that has a chance of not working first to avoid O(n^2)
-            if (giverTilesLength > logN && takerTilesLength > logN)
+            if (!MonstermosUseExpensiveAirflow && giverTilesLength > logN && takerTilesLength > logN)
             {
                 // Even if it fails, it will speed up the next part.
                 Array.Sort(_equalizeTiles, 0, tileCount, _monstermosComparer);
@@ -550,7 +552,8 @@ private void ExplosivelyDepressurize(
                 }
 
                 InvalidateVisuals(otherTile.GridIndex, otherTile.GridIndices, visuals);
-                HandleDecompressionFloorRip(mapGrid, otherTile, otherTile.MonstermosInfo.CurrentTransferAmount);
+                if (MonstermosRipTiles && otherTile.PressureDifference > MonstermosRipTilesMinimumPressure)
+                    HandleDecompressionFloorRip(mapGrid, otherTile, otherTile.PressureDifference);
             }
 
             if (GridImpulse && tileCount > 0)
@@ -676,14 +679,14 @@ private void AdjustEqMovement(TileAtmosphere tile, AtmosDirection direction, flo
             adj.MonstermosInfo[direction.GetOpposite()] -= amount;
         }
 
-        private void HandleDecompressionFloorRip(MapGridComponent mapGrid, TileAtmosphere tile, float sum)
+        private void HandleDecompressionFloorRip(MapGridComponent mapGrid, TileAtmosphere tile, float delta)
         {
-            if (!MonstermosRipTiles)
+            if (!mapGrid.TryGetTileRef(tile.GridIndices, out var tileRef))
                 return;
+            var tileref = tileRef.Tile;
 
-            var chance = MathHelper.Clamp(0.01f + (sum / SpacingMaxWind) * 0.3f, 0.003f, 0.3f);
-
-            if (sum > 20 && _robustRandom.Prob(chance))
+            var tileDef = (ContentTileDefinition) _tileDefinitionManager[tileref.TypeId];
+            if (!tileDef.Reinforced && tileDef.TileRipResistance < delta * MonstermosRipTilesPressureOffset)
                 PryTile(mapGrid, tile.GridIndices);
         }
 

Content.Server/Atmos/EntitySystems/AtmosphereSystem.cs

@@ -6,6 +6,7 @@
 using Content.Shared.Atmos.EntitySystems;
 using Content.Shared.Doors.Components;
 using Content.Shared.Maps;
+using Content.Shared.Throwing;
 using JetBrains.Annotations;
 using Robust.Server.GameObjects;
 using Robust.Shared.Audio.Systems;
@@ -37,6 +38,7 @@ public sealed partial class AtmosphereSystem : SharedAtmosphereSystem
     [Dependency] private readonly TileSystem _tile = default!;
     [Dependency] private readonly MapSystem _map = default!;
     [Dependency] public readonly PuddleSystem Puddle = default!;
+    [Dependency] private readonly ThrowingSystem _throwing = default!;
 
     private const float ExposedUpdateDelay = 1f;
     private float _exposedTimer = 0f;

Content.Server/Temperature/Systems/TemperatureSystem.cs

@@ -163,8 +163,9 @@ public float GetHeatCapacity(EntityUid uid, TemperatureComponent? comp = null, P
         {
             return Atmospherics.MinimumHeatCapacity;
         }
-
-        return comp.SpecificHeat * physics.FixturesMass;
+        if (physics.Mass < 1)
+            return comp.SpecificHeat;
+        else return comp.SpecificHeat * physics.FixturesMass;
     }
 
     private void OnInit(EntityUid uid, InternalTemperatureComponent comp, MapInitEvent args)