An experiment

core/src/mindustry/entities/comp/PayloadComp.java

@@ -15,6 +15,7 @@ import mindustry.gen.*;
 import mindustry.type.*;
 import mindustry.world.*;
 import mindustry.world.blocks.payloads.*;
+import mindustry.world.blocks.power.*;
 
 /** An entity that holds a payload. */
 @Component
@@ -22,8 +23,38 @@ abstract class PayloadComp implements Posc, Rotc, Hitboxc, Unitc{
     @Import float x, y, rotation;
     @Import UnitType type;
 
+    private transient @Nullable PowerGraph payloadPower;
+
     Seq<Payload> payloads = new Seq<>();
 
+    //uncomment for insanity
+    /*
+    @Override
+    public void update(){
+        if(payloadPower != null){
+            payloadPower.clear();
+        }
+
+        //update power graph first, resolve everything
+        for(Payload pay : payloads){
+            if(pay instanceof BuildPayload pb && pb.build.power != null){
+                if(payloadPower == null) payloadPower = new PowerGraph();
+
+                pb.build.power.graph = null;
+                payloadPower.add(pb.build);
+            }
+        }
+
+        if(payloadPower != null){
+            payloadPower.update();
+        }
+
+        for(Payload pay : payloads){
+            pay.set(x, y, rotation);
+            pay.update(true);
+        }
+    }*/
+
     float payloadUsed(){
         return payloads.sumf(p -> p.size() * p.size());
     }
@@ -50,7 +81,7 @@ abstract class PayloadComp implements Posc, Rotc, Hitboxc, Unitc{
 
     void pickup(Unit unit){
         unit.remove();
-        payloads.add(new UnitPayload(unit));
+        addPayload(new UnitPayload(unit));
         Fx.unitPickup.at(unit);
         if(Vars.net.client()){
             Vars.netClient.clearRemovedEntity(unit.id);
@@ -62,7 +93,7 @@ abstract class PayloadComp implements Posc, Rotc, Hitboxc, Unitc{
         tile.pickedUp();
         tile.tile.remove();
         tile.tile = Vars.emptyTile;
-        payloads.add(new BuildPayload(tile));
+        addPayload(new BuildPayload(tile));
         Fx.unitPickup.at(tile);
         Events.fire(new PickupEvent(self(), tile));
     }

core/src/mindustry/world/Block.java

@@ -120,6 +120,8 @@ public class Block extends UnlockableContent{
     public boolean autoResetEnabled = true;
     /** if true, the block stops updating when disabled */
     public boolean noUpdateDisabled = false;
+    /** if true, this block updates when a payload of a unit. Currently unused! */
+    public boolean updateInUnits = true;
     /** Whether to use this block's color in the minimap. Only used for overlays. */
     public boolean useColor = true;
     /** item that drops from this block, used for drills */

core/src/mindustry/world/blocks/defense/turrets/BaseTurret.java

@@ -31,6 +31,7 @@ public class BaseTurret extends Block{
         priority = TargetPriority.turret;
         group = BlockGroup.turrets;
         flags = EnumSet.of(BlockFlag.turret);
+        updateInUnits = false;
     }
 
     @Override

core/src/mindustry/world/blocks/distribution/PayloadConveyor.java

@@ -127,7 +127,7 @@ public class PayloadConveyor extends Block{
             if(!enabled) return;
 
             if(item != null){
-                item.update();
+                item.update(false);
             }
 
             lastInterp = curInterp;

core/src/mindustry/world/blocks/payloads/BuildPayload.java

@@ -37,7 +37,9 @@ public class BuildPayload implements Payload{
     }
 
     @Override
-    public void update(){
+    public void update(boolean inUnit){
+        if(inUnit && !build.block.updateInUnits) return;
+
         if(build.tile == null) build.tile = emptyTile;
         build.update();
     }

core/src/mindustry/world/blocks/payloads/Payload.java

@@ -36,8 +36,9 @@ public interface Payload extends Position{
     /** @return the time taken to build this payload. */
     float buildTime();
 
-    /** update this payload if it is a block */
-    default void update(){}
+    /** update this payload if it is a block
+     * @param inUnit whether this payload is in a unit */
+    default void update(boolean inUnit){}
 
     /** @return whether this payload was dumped. */
     default boolean dump(){

core/src/mindustry/world/blocks/payloads/PayloadBlock.java

@@ -138,7 +138,7 @@ public class PayloadBlock extends Block{
         @Override
         public void updateTile(){
             if(payload != null){
-                payload.update();
+                payload.update(false);
             }
         }
 

core/src/mindustry/world/blocks/power/NuclearReactor.java

@@ -49,6 +49,7 @@ public class NuclearReactor extends PowerGenerator{
 
     public NuclearReactor(String name){
         super(name);
+        updateInUnits = false;
         itemCapacity = 30;
         liquidCapacity = 30;
         hasItems = true;
@@ -138,7 +139,7 @@ public class NuclearReactor extends PowerGenerator{
             if((fuel < 5 && heat < 0.5f) || !state.rules.reactorExplosions) return;
 
             Effect.shake(6f, 16f, x, y);
-            Damage.damage(x, y, explosionRadius * tilesize, explosionDamage * 4);
+            Damage.damage(x, y, explosionRadius * tilesize * (float)(fuel / itemCapacity), explosionDamage * 4);
 
             explodeEffect.at(x, y);
         }

core/src/mindustry/world/blocks/power/PowerGraph.java

@@ -280,6 +280,13 @@ public class PowerGraph{
         }
     }
 
+    public void clear(){
+        all.clear();
+        producers.clear();
+        consumers.clear();
+        batteries.clear();
+    }
+
     public void reflow(Building tile){
         queue.clear();
         queue.addLast(tile);

core/src/mindustry/world/consumers/ConsumePower.java

@@ -68,7 +68,8 @@ public class ConsumePower extends Consume{
      * @return The amount of power which is requested per tick.
      */
     public float requestedPower(Building entity){
-        if(entity.tile == null || entity.tile.build == null) return 0f;
+        if(entity == null) return 0f;
+
         if(buffered){
             return (1f-entity.power.status)*capacity;
         }else{