Adds slippery items (#1321)

* Start work on Slippery Component

* Slips work

* Add banana peel

* Add required slip speed

* Add slip sound

* Adds soap

* Make soapnt, soapsyndie and soapdeluxe inherit soap

* Adds homemade soap and omega soap

* Fix slipping not taking into account the entity being in a container

Content.Server/GameObjects/Components/Movement/SlipperyComponent.cs

@@ -0,0 +1,115 @@
+using System.Collections.Generic;
+using System.Timers;
+using Content.Server.GameObjects.Components.Mobs;
+using Content.Server.Throw;
+using Content.Shared.Audio;
+using Content.Shared.Physics;
+using Robust.Server.GameObjects.EntitySystems;
+using Robust.Shared.Containers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Components;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Map;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+using Timer = Robust.Shared.Timers.Timer;
+
+namespace Content.Server.GameObjects.Components.Movement
+{
+    [RegisterComponent]
+    public class SlipperyComponent : Component, ICollideBehavior
+    {
+        [Dependency] private IEntityManager _entityManager = default!;
+
+        public override string Name => "Slippery";
+
+        private List<EntityUid> _slipped = new List<EntityUid>();
+
+        /// <summary>
+        ///     How many seconds the mob will be paralyzed for.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float ParalyzeTime { get; set; } = 3f;
+
+        /// <summary>
+        ///     Percentage of shape intersection for a slip to occur.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float IntersectPercentage { get; set; } = 0.3f;
+
+        /// <summary>
+        ///     Entities will only be slipped if their speed exceeds this limit.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float RequiredSlipSpeed { get; set; } = 0f;
+
+        /// <summary>
+        ///     Path to the sound to be played when a mob slips.
+        /// </summary>
+        [ViewVariables]
+        public string SlipSound { get; set; } = "/Audio/Effects/slip.ogg";
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            var collidable = Owner.GetComponent<ICollidableComponent>();
+
+            collidable.Hard = false;
+            var shape = collidable.PhysicsShapes[0];
+            shape.CollisionLayer |= (int) CollisionGroup.MobImpassable;
+            shape.CollisionMask = (int)CollisionGroup.None;
+        }
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+            serializer.DataField(this, x => ParalyzeTime, "paralyzeTime", 3f);
+            serializer.DataField(this, x  => IntersectPercentage, "intersectPercentage", 0.3f);
+            serializer.DataField(this, x => RequiredSlipSpeed, "requiredSlipSpeed", 0f);
+            serializer.DataField(this, x => SlipSound, "slipSound", "/Audio/Effects/slip.ogg");
+        }
+
+        public void CollideWith(IEntity collidedWith)
+        {
+            if (ContainerHelpers.IsInContainer(Owner)
+                ||  _slipped.Contains(collidedWith.Uid)
+                ||  !collidedWith.TryGetComponent(out StunnableComponent stun)
+                ||  !collidedWith.TryGetComponent(out ICollidableComponent otherBody)
+                ||  !collidedWith.TryGetComponent(out PhysicsComponent otherPhysics)
+                ||  !Owner.TryGetComponent(out ICollidableComponent body))
+                return;
+
+            if (otherPhysics.LinearVelocity.Length < RequiredSlipSpeed || stun.KnockedDown)
+                return;
+
+            var percentage = otherBody.WorldAABB.IntersectPercentage(body.WorldAABB);
+
+            if (percentage < IntersectPercentage)
+                return;
+
+            stun.Paralyze(5f);
+            _slipped.Add(collidedWith.Uid);
+
+            if(!string.IsNullOrEmpty(SlipSound))
+                EntitySystem.Get<AudioSystem>().PlayFromEntity(SlipSound, Owner, AudioHelpers.WithVariation(0.2f));
+        }
+
+        public void Update(float frameTime)
+        {
+            foreach (var uid in _slipped.ToArray())
+            {
+                if(!uid.IsValid() || !_entityManager.EntityExists(uid)) continue;
+
+                var entity = _entityManager.GetEntity(uid);
+                var collidable = Owner.GetComponent<ICollidableComponent>();
+                var otherCollidable = entity.GetComponent<ICollidableComponent>();
+
+                if (!collidable.WorldAABB.Intersects(otherCollidable.WorldAABB))
+                    _slipped.Remove(uid);
+            }
+        }
+    }
+}

Content.Server/GameObjects/EntitySystems/SlipperySystem.cs

@@ -0,0 +1,26 @@
+using Content.Server.GameObjects.Components.Movement;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Systems;
+
+namespace Content.Server.GameObjects.EntitySystems
+{
+    public class SlipperySystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            EntityQuery = new TypeEntityQuery(typeof(SlipperyComponent));
+        }
+
+        public override void Update(float frameTime)
+        {
+            base.Update(frameTime);
+
+            foreach (var entity in RelevantEntities)
+            {
+                entity.GetComponent<SlipperyComponent>().Update(frameTime);
+            }
+        }
+    }
+}

Resources/Prototypes/Entities/Items/Consumables/food.yml

@@ -3027,3 +3027,21 @@
     sprite: Objects/Consumable/Food/milkape.rsi
   - type: Icon
     sprite: Objects/Consumable/Food/milkape.rsi
+
+- type: entity
+  name: banana
+  parent: FoodBase
+  id: FoodBanana
+  description: Rich in potassium.
+  components:
+    - type: Food
+      trash: TrashBananaPeel
+    - type: Solution
+      contents:
+        reagents:
+          - ReagentId: chem.Nutriment
+            Quantity: 6
+    - type: Sprite
+      sprite: Objects/Consumable/Food/banana.rsi
+    - type: Icon
+      sprite: Objects/Consumable/Food/banana.rsi

Resources/Prototypes/Entities/Items/Consumables/trash.yml

@@ -200,3 +200,16 @@
     sprite: Objects/Consumable/Trash/waffles.rsi
   - type: Icon
     sprite: Objects/Consumable/Trash/waffles.rsi
+
+- type: entity
+  name: banana peel
+  parent: TrashBase
+  id: TrashBananaPeel
+  components:
+    - type: Sprite
+      sprite: Objects/Consumable/Food/banana.rsi
+      state: peel
+    - type: Icon
+      sprite: Objects/Consumable/Food/banana.rsi
+      state: peel
+    - type: Slippery

Resources/Prototypes/Entities/janitor.yml

@@ -104,3 +104,92 @@
   - type: Item
     sprite: Objects/Specific/Janitorial/wet_floor_sign.rsi
 
+- type: entity
+  name: soap
+  id: Soap
+  parent: BaseItem
+  description: A cheap bar of soap. Doesn't smell.
+  components:
+    - type: Sprite
+      sprite: Objects/Specific/Janitorial/soap.rsi
+      state: soap
+
+    - type: Icon
+      sprite: Objects/Specific/Janitorial/soap.rsi
+      state: soap
+
+    - type: Item
+      sprite: Objects/Specific/Janitorial/soap.rsi
+
+    - type: Slippery
+      paralyzeTime: 2.5
+
+
+- type: entity
+  name: soap
+  id: SoapNT
+  parent: Soap
+  description: A Nanotrasen brand bar of soap. Smells of phoron.
+  components:
+    - type: Sprite
+      state: soapnt
+
+    - type: Icon
+      state: soapnt
+
+- type: entity
+  name: soap
+  id: SoapDeluxe
+  parent: Soap
+  description: A deluxe Waffle Co. brand bar of soap. Smells of condoms.
+  components:
+    - type: Sprite
+      state: soapdeluxe
+
+    - type: Icon
+      state: soapdeluxe
+
+- type: entity
+  name: soap
+  id: SoapSyndie
+  parent: Soap
+  description: An untrustworthy bar of soap. Smells of fear.
+  components:
+    - type: Sprite
+      state: soapsyndie
+
+    - type: Icon
+      state: soapsyndie
+
+    - type: Slippery
+      paralyzeTime: 5
+
+- type: entity
+  name: soap
+  id: SoapHomemade
+  parent: Soap
+  description: A homemade bar of soap. Smells of... well....
+  components:
+    - type: Sprite
+      state: soapgibs
+
+    - type: Icon
+      state: soapgibs
+
+    - type: Slippery
+      paralyzeTime: 2
+
+- type: entity
+  name: omega soap
+  id: SoapOmega
+  parent: Soap
+  description: The most advanced soap known to mankind. Smells of bluespace.
+  components:
+    - type: Sprite
+      state: soapomega
+
+    - type: Icon
+      state: soapomega
+
+    - type: Slippery
+      paralyzeTime: 7

Resources/Textures/Objects/Consumable/Food/banana.rsi/meta.json

@@ -0,0 +1,28 @@
+{
+    "version": 1,
+    "size": {
+        "x": 32,
+        "y": 32
+    },
+    "license": "CC-BY-SA 3.0",
+    "states": [
+        {
+            "name": "icon",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "peel",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        }
+    ]
+}

Resources/Textures/Objects/Specific/Janitorial/soap.rsi/meta.json

@@ -0,0 +1,65 @@
+{
+    "version": 1,
+    "size": {
+        "x": 32,
+        "y": 32
+    },
+    "license": "CC-BY-SA 3.0",
+    "copyright": "Taken from https://github.com/vgstation-coders/vgstation13 at a407fc1f5c25cbce8b653c553f53be294d15b071 and https://github.com/tgstation/tgstation at 259acc8c81054d89f7b6bcd9ff702fdf587a19ed. soapomega.png modified by Zumorica",
+    "states": [
+        {
+            "name": "soap",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "soapdeluxe",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "soapgibs",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "soapnt",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "soapomega",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
+        {
+            "name": "soapsyndie",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        }
+    ]
+}