Radiation pulse ECS (#10641)

Content.Server/Radiation/Systems/RadiationSystem.cs

@@ -7,6 +7,31 @@ public sealed class RadiationSystem : EntitySystem
 {
     [Dependency] private readonly EntityLookupSystem _lookup = default!;
 
+    private const float RadiationCooldown = 1.0f;
+    private float _accumulator;
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+        _accumulator += frameTime;
+
+        while (_accumulator > RadiationCooldown)
+        {
+            _accumulator -= RadiationCooldown;
+
+            // All code here runs effectively every RadiationCooldown seconds, so use that as the "frame time".
+            foreach (var comp in EntityManager.EntityQuery<RadiationSourceComponent>())
+            {
+                var ent = comp.Owner;
+                if (Deleted(ent))
+                    continue;
+
+                var cords = Transform(ent).MapPosition;
+                IrradiateRange(cords, comp.Range, comp.RadsPerSecond, RadiationCooldown);
+            }
+        }
+    }
+
     public void IrradiateRange(MapCoordinates coordinates, float range, float radsPerSecond, float time)
     {
         var lookUp = _lookup.GetEntitiesInRange(coordinates, range);