All the things

Content.Server/Weapons/Ranged/Systems/GunSystem.cs

@@ -4,6 +4,7 @@
 using Content.Server.Interaction;
 using Content.Server.Power.EntitySystems;
 using Content.Server.Stunnable;
+using Content.Server.Temperature.Systems;
 using Content.Server.Weapons.Ranged.Components;
 using Content.Shared.Damage;
 using Content.Shared.Damage.Systems;
@@ -40,6 +41,7 @@ public sealed partial class GunSystem : SharedGunSystem
     [Dependency] private readonly StaminaSystem _stamina = default!;
     [Dependency] private readonly StunSystem _stun = default!;
     [Dependency] private readonly SharedContainerSystem _container = default!;
+    [Dependency] private readonly TemperatureSystem _temperature = default!;
 
     private const float DamagePitchVariation = 0.05f;
     public const float GunClumsyChance = 0.5f;
@@ -225,6 +227,11 @@ public override void Shoot(EntityUid gunUid, GunComponent gun, List<(EntityUid?
                         var hitEntity = lastHit.Value;
                         if (hitscan.StaminaDamage > 0f)
                             _stamina.TakeStaminaDamage(hitEntity, hitscan.StaminaDamage, source: user);
+                        /// <summary>
+                        /// DeltaV: Changes the target's temperature by this amount when hit.
+                        /// </summary>
+                        if (hitscan.HeatChange != 0f)
+                             _temperature.ChangeHeat(hitEntity, hitscan.HeatChange, true);
 
                         var dmg = hitscan.Damage;
 

Content.Shared/Weapons/Ranged/HitscanPrototype.cs

@@ -16,6 +16,11 @@ public sealed partial class HitscanPrototype : IPrototype, IShootable
 
     [ViewVariables(VVAccess.ReadWrite), DataField("staminaDamage")]
     public float StaminaDamage;
+    /// <summary>
+    /// DeltaV: Changes the target's temperature by this amount when hit.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField("heatChange")]
+    public float HeatChange;
 
     [ViewVariables(VVAccess.ReadWrite), DataField("damage")]
     public DamageSpecifier? Damage;

Resources/Locale/en-US/deltav/research/technologies.ftl

@@ -5,3 +5,4 @@ research-technology-energy-gun = Energy Guns
 research-technology-energy-gun-advance = Advanced Energy Manipulation
 research-technology-advance-laser = Advanced Laser Manipulation
 research-technology-robust-melee = Robust Melee
+research-technology-ionized-cryogenic-emission-equipment = Ionized Cryogenic Emission Equipment

Resources/Prototypes/DeltaV/Entities/Objects/Weapons/Guns/Battery/battery_guns.yml

@@ -261,3 +261,28 @@
     steps: 5
     zeroVisible: true
   - type: Appearance
+
+
+- type: entity
+  name: I.C.E.E.
+  parent: [BaseWeaponBattery, BaseGunWieldable, BaseRestrictedContraband]
+  id: WeaponColdCannon
+  description: It's cooler than a normal gun.
+  components:
+  - type: Sprite
+    sprite: DeltaV\Objects\Weapons\Guns\Battery\cold_cannon.rsi
+    layers:
+    - state: base
+      map: ["enum.GunVisualLayers.Base"]
+    - state: mag-unshaded-4
+      map: ["enum.GunVisualLayers.MagUnshaded"]
+      shader: unshaded
+  - type: Clothing
+    sprite: DeltaV\Objects\Weapons\Guns\Battery\cold_cannon.rsi
+  - type: Gun
+    fireRate: 1.5
+    soundGunshot:
+      path: /Audio/Weapons/Guns/Gunshots/laser_cannon.ogg
+  - type: HitscanBatteryAmmoProvider
+    proto: ColdLaser
+    fireCost: 100

Resources/Prototypes/DeltaV/Entities/Objects/Weapons/Guns/Projectiles/hitscan.yml

@@ -19,8 +19,6 @@
   damage:
     types:
       Cold: 20
-- type: ChangeTemperatureOnCollide
-  heat: -50000
   muzzleFlash:
     sprite: Objects/Weapons/Guns/Projectiles/projectiles.rsi
     state: muzzle_omni

Resources/Prototypes/DeltaV/Recipes/Lathes/security.yml

@@ -224,3 +224,12 @@
     Steel: 1000
     Plastic: 800
 
+- type: latheRecipe
+  parent: BaseWeaponRecipeLong
+  id: WeaponColdCannon
+  result: WeaponColdCannon
+  materials:
+    Steel: 1500
+    Glass: 600
+    Plastic: 400
+    Silver: 300

Resources/Prototypes/DeltaV/Research/arsenal.yml

@@ -52,3 +52,15 @@
   cost: 12500
   recipeUnlocks:
   - AdvancedTruncheon
+
+- type: technology
+  id: IonizedCryogenicEmissionEquiplment
+  name: research-technology-ionized-cryogenic-emission-equipment
+  icon:
+    sprite: DeltaV\Objects\Weapons\Guns\Battery\cold_cannon.rsi
+    state: icon
+  discipline: Arsenal
+  tier: 3
+  cost: 10000
+  recipeUnlocks:
+  - WeaponColdCannon

Resources/Prototypes/Entities/Structures/Machines/lathe.yml

@@ -436,6 +436,7 @@
       - MagazineBoxSpecialHoly
       - MagazineBoxSpecialMindbreaker
       - AdvancedTruncheon
+      - WeaponColdCannon
       # End DeltaV additions
 
 - type: entity
@@ -941,6 +942,7 @@
       - ClothingOuterHardsuitSyndieReverseEngineered
       - ClothingShoesBootsSecurityMagboots
       - AdvancedTruncheon
+      - WeaponColdCannon
       # End DeltaV additions
   - type: MaterialStorage
     whitelist:

Resources/Textures/DeltaV/Objects/Weapons/Guns/Battery/cold_cannon.rsi/meta.json

@@ -0,0 +1,85 @@
+{
+	"version": 1,
+	"license": "CC-BY-SA-3.0",
+	"copyright": "Taken from vgstation at https://github.com/vgstation-coders/vgstation13/commit/125c975f1b3bf9826b37029e9ab5a5f89e975a7e, backpack sprite by Peptide, backpack sling sprite edited by Boaz1111, wield sprites by RiceMar1244",
+	"size": {
+		"x": 32,
+		"y": 32
+	},
+    "states": [
+        {
+            "name": "icon"
+        },
+        {
+            "name": "base"
+        },
+        {
+            "name": "mag-unshaded-1"
+        },
+        {
+            "name": "mag-unshaded-2"
+        },
+        {
+            "name": "mag-unshaded-3"
+        },
+        {
+            "name": "mag-unshaded-4"
+        },
+        {
+            "name": "inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "wielded-inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "wielded-inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "0-inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "0-inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "25-inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "25-inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "50-inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "50-inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "75-inhand-left",
+            "directions": 4
+        },
+        {
+            "name": "75-inhand-right",
+            "directions": 4
+        },
+        {
+            "name": "equipped-BACKPACK",
+            "directions": 4
+        },
+        {
+            "name": "equipped-SUITSTORAGE",
+            "directions": 4
+        }
+    ]
+}