Make atmos Turing-complete (#10520)

* Add pneumatic valves

Pneumatic valves permit bidirectional flow between the inlet and outlet
if the pressure at the control port is high enough.

* Add construction recipe

Resources/Prototypes/Entities/Structures/Piping/Atmospherics/trinary.yml

@@ -198,3 +198,58 @@
         !type:PipeNode
         nodeGroupID: Pipe
         pipeDirection: North
+
+- type: entity
+  parent: GasPipeBase
+  id: PressureControlledValve
+  name: pneumatic valve
+  description: Valve controlled by pressure.
+  placement:
+    mode: SnapgridCenter
+  components:
+    - type: AtmosDevice
+    - type: SubFloorHide
+      blockInteractions: false
+      blockAmbience: false
+    - type: NodeContainer
+      nodes:
+        inlet:
+          !type:PipeNode
+          nodeGroupID: Pipe
+          pipeDirection: North
+        control:
+          !type:PipeNode
+          nodeGroupID: Pipe
+          pipeDirection: West
+        outlet:
+          !type:PipeNode
+          nodeGroupID: Pipe
+          pipeDirection: South
+    - type: Sprite
+      netsync: false
+      sprite: Structures/Piping/Atmospherics/pneumaticvalve.rsi
+      layers:
+        - sprite: Structures/Piping/Atmospherics/pipe.rsi
+          state: pipeTJunction
+          rotation: -90
+          map: [ "enum.PipeVisualLayers.Pipe" ]
+        - state: off
+          map: [ "enum.SubfloorLayers.FirstLayer", "enabled" ]
+    - type: Appearance
+    - type: GenericVisualizer
+      visuals:
+        enum.FilterVisuals.Enabled:
+          enabled:
+            True: { state: on }
+            False: { state: off }
+    - type: PipeColorVisuals
+    - type: PressureControlledValve
+    - type: AmbientSound
+      enabled: false
+      volume: -9
+      range: 5
+      sound:
+        path: /Audio/Ambience/Objects/gas_hiss.ogg
+    - type: Construction
+      graph: GasTrinary
+      node: pneumaticvalve

Resources/Prototypes/Recipes/Construction/Graphs/utilities/atmos_trinary.yml

@@ -16,6 +16,12 @@
         amount: 2
         doAfter: 1
 
+    - to: pneumaticvalve
+      steps:
+      - material: Steel
+        amount: 2
+        doAfter: 1
+
   - node: filter
     entity: GasFilter
     edges:
@@ -47,3 +53,19 @@
       steps:
       - tool: Welding
         doAfter: 1
+
+  - node: pneumaticvalve
+    entity: PressureControlledValve
+    edges:
+    - to: start
+      conditions:
+      - !type:EntityAnchored
+        anchored: false
+      completed:
+      - !type:SpawnPrototype
+        prototype: SheetSteel1
+        amount: 2
+      - !type:DeleteEntity
+      steps:
+      - tool: Welding
+        doAfter: 1

Resources/Prototypes/Recipes/Construction/utilities.yml

@@ -12,7 +12,7 @@
     state: camera
   objectType: Structure
   placementMode: SnapgridCenter
-  
+
 - type: construction
   name: telescreen
   id: WallmountTelescreen
@@ -511,3 +511,17 @@
   conditions:
     - !type:TileNotBlocked {}
 
+- type: construction
+  id: PressureControlledValve
+  name: pneumatic valve
+  graph: GasTrinary
+  startNode: start
+  targetNode: pneumaticvalve
+  category: Utilities
+  placementMode: SnapgridCenter
+  canBuildInImpassable: false
+  icon:
+    sprite: Structures/Piping/Atmospherics/pneumaticvalve.rsi
+    state: off
+  conditions:
+    - !type:TileNotBlocked {}

Resources/Textures/Structures/Piping/Atmospherics/pneumaticvalve.rsi/meta.json

@@ -0,0 +1,19 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-4.0",
+  "copyright": "Kevin Zheng 2022",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "off",
+      "directions": 4
+    },
+    {
+      "name": "on",
+      "directions": 4
+    }
+  ]
+}