Add Smoke and Foam chemical reaction effects. (#2913)

* Adds smoke reaction effect

* smoke tweaks

* address reviews

* Smoke fix

* Refactor smoke and add foam

* Fix stuff

* Remove thing

* Little things

* Address some comments

* Address more things

* More addressing

* License stuff

* Address refactor request

* Small things

* Add nullability

* Update Content.Server/GameObjects/EntitySystems/SolutionAreaEffectSystem.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

Resources/Prototypes/Recipes/Reactions/chemicals.yml

@@ -40,6 +40,20 @@
   products:
     chem.PolytrinicAcid: 3
 
+- type: reaction
+  id: react.FluorosulfuricAcid
+  reactants:
+    chem.Fluorine:
+      amount: 1
+    chem.Hydrogen:
+      amount: 1
+    chem.Potassium:
+      amount: 1
+    chem.SulfuricAcid:
+      amount: 1
+  products:
+    chem.FluorosulfuricAcid: 4
+
 - type: reaction
   id: react.PotassiumExplosion
   reactants:
@@ -57,6 +71,94 @@
       scaled: true #Scaled proportionally to amount of potassium and water
       maxScale: 30 #Explosion strength stops scaling at 30 potassium + 30 water
 
+- type: reaction
+  id: react.Smoke
+  reactants:
+    chem.Phosphorus:
+      amount: 1
+    chem.Potassium:
+      amount: 1
+    chem.Sugar:
+      amount: 1
+  effects:
+    - !type:SmokeAreaReactionEffect
+      rangeConstant: 0
+      rangeMultiplier: 1.1 #Range formula: rangeConstant + rangeMultiplier*sqrt(ReactionUnits)
+      maxRange: 10
+      duration: 10
+      spreadDelay: 0.5
+      removeDelay: 0.5
+      diluteReagents: false
+      prototypeId: Smoke
+      sound: /Audio/Effects/smoke.ogg
+
+- type: reaction
+  id: react.Foam
+  reactants:
+    chem.Fluorosurfactant:
+      amount: 1
+    chem.Water:
+      amount: 1
+  effects:
+    - !type:FoamAreaReactionEffect
+      rangeConstant: 0
+      rangeMultiplier: 1.1 #Range formula: rangeConstant + rangeMultiplier*sqrt(ReactionUnits)
+      maxRange: 10
+      duration: 10
+      spreadDelay: 1
+      removeDelay: 0
+      diluteReagents: true
+      reagentDilutionStart: 4 #At what range should the reagents start diluting
+      reagentDilutionFactor: 1
+      reagentMaxConcentrationFactor: 2 #The reagents will get multiplied by this number if the range turns out to be 0
+      prototypeId: Foam
+
+- type: reaction
+  id: react.IronMetalFoam
+  reactants:
+    chem.Iron:
+      amount: 3
+    chem.FoamingAgent:
+      amount: 1
+    chem.FluorosulfuricAcid:
+      amount: 1
+  effects:
+    - !type:FoamAreaReactionEffect
+      rangeConstant: 0
+      rangeMultiplier: 1.1
+      maxRange: 10
+      duration: 10
+      spreadDelay: 1
+      removeDelay: 0
+      diluteReagents: true
+      reagentDilutionStart: 4
+      reagentDilutionFactor: 1
+      reagentMaxConcentrationFactor: 2
+      prototypeId: IronMetalFoam
+
+- type: reaction
+  id: react.AluminiumMetalFoam
+  reactants:
+    chem.Aluminium:
+      amount: 3
+    chem.FoamingAgent:
+      amount: 1
+    chem.FluorosulfuricAcid:
+      amount: 1
+  effects:
+    - !type:FoamAreaReactionEffect
+      rangeConstant: 0
+      rangeMultiplier: 1.1
+      maxRange: 10
+      duration: 10
+      spreadDelay: 1
+      removeDelay: 0
+      diluteReagents: true
+      reagentDilutionStart: 4
+      reagentDilutionFactor: 1
+      reagentMaxConcentrationFactor: 2
+      prototypeId: AluminiumMetalFoam
+
 - type: reaction
   id: react.TableSalt
   reactants:
@@ -100,3 +202,15 @@
       amount: 1
   products:
     chem.Water: 2
+
+- type: reaction
+  id: react.Fluorosurfactant
+  reactants:
+    chem.Carbon:
+      amount: 2
+    chem.Fluorine:
+      amount: 2
+    chem.SulfuricAcid:
+      amount: 1
+  products:
+    chem.Fluorosurfactant: 5