Building target discovered check

core/src/mindustry/ai/BlockIndexer.java

@@ -356,7 +356,7 @@ public class BlockIndexer{
             if(enemy == team || (enemy == Team.derelict && !state.rules.coreCapture)) continue;
 
             Building candidate = indexer.findTile(enemy, x, y, range, pred, true);
-            if(candidate == null) continue;
+            if(candidate == null || !candidate.isDiscovered(team)) continue;
 
             //if a block has the same priority, the closer one should be targeted
             float dist = candidate.dst(x, y) - candidate.hitSize() / 2f;

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

@@ -271,6 +271,19 @@ abstract class BuildingComp implements Posc, Teamc, Healthc, Buildingc, Timerc,
     //endregion
     //region utility methods
 
+    public boolean isDiscovered(Team viewer){
+        if(block.size <= 2){
+            return fogControl.isDiscovered(viewer, tile.x, tile.y);
+        }else{
+            int s = block.size / 2;
+            return fogControl.isDiscovered(viewer, tile.x, tile.y) ||
+                fogControl.isDiscovered(viewer, tile.x - s, tile.y - s) ||
+                fogControl.isDiscovered(viewer, tile.x - s, tile.y + s) ||
+                fogControl.isDiscovered(viewer, tile.x + s, tile.y + s) ||
+                fogControl.isDiscovered(viewer, tile.x + s, tile.y - s);
+        }
+    }
+
     public void addPlan(boolean checkPrevious){
         addPlan(checkPrevious, false);
     }

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

@@ -63,6 +63,10 @@ public class BaseTurret extends Block{
         super.drawPlace(x, y, rotation, valid);
 
         Drawf.dashCircle(x * tilesize + offset, y * tilesize + offset, range, Pal.placing);
+
+        if(fogRadiusMultiuplier < 0.99f && state.rules.fog){
+            Drawf.dashCircle(x * tilesize + offset, y * tilesize + offset, range * fogRadiusMultiuplier, Pal.lightishGray);
+        }
     }
 
     @Override