Unit AI fixes / Other general fixes

core/src/io/anuke/mindustry/entities/type/BaseUnit.java

@@ -129,7 +129,10 @@ public abstract class BaseUnit extends Unit implements ShooterTrait{
     }
 
     public void targetClosest(){
-        target = Units.getClosestTarget(team, x, y, Math.max(getWeapon().bullet.range(), type.range), u -> type.targetAir || !u.isFlying());
+        TargetTrait newTarget = Units.getClosestTarget(team, x, y, Math.max(getWeapon().bullet.range(), type.range), u -> type.targetAir || !u.isFlying());
+        if(newTarget != null){
+            target = newTarget;
+        }
     }
 
     public TileEntity getClosestEnemyCore(){

core/src/io/anuke/mindustry/entities/type/FlyingUnit.java

@@ -47,7 +47,7 @@ public abstract class FlyingUnit extends BaseUnit{
                 attack(type.attackLength);
 
                 if((Angles.near(angleTo(target), rotation, type.shootCone) || getWeapon().ignoreRotation) //bombers and such don't care about rotation
-                && dst(target) < Math.max(getWeapon().bullet.range(), type.range)){
+                && dst(target) < getWeapon().bullet.range()){
                     BulletType ammo = getWeapon().bullet;
 
                     if(type.rotateWeapon){
@@ -75,8 +75,9 @@ public abstract class FlyingUnit extends BaseUnit{
                 targetClosest();
                 targetClosestEnemyFlag(BlockFlag.target);
 
-                if(target != null){
+                if(target != null && !Units.invalidateTarget(target, team, x, y)){
                     setState(attack);
+                    return;
                 }
 
                 target = getClosestCore();

core/src/io/anuke/mindustry/entities/type/GroundUnit.java

@@ -54,10 +54,11 @@ public abstract class GroundUnit extends BaseUnit{
     patrol = new UnitState(){
         public void update(){
             TileEntity target = getClosestCore();
+
             if(target != null){
                 if(dst(target) > 400f){
                     moveAwayFromCore();
-                }else{
+                }else if(!(!Units.invalidateTarget(GroundUnit.this.target, GroundUnit.this) && dst(GroundUnit.this.target) < getWeapon().bullet.range())){
                     patrol();
                 }
             }

core/src/io/anuke/mindustry/entities/type/TileEntity.java

@@ -63,6 +63,10 @@ public class TileEntity extends BaseEntity implements TargetTrait, HealthTrait{
     public static void onTileDamage(Tile tile, float health){
         if(tile.entity != null){
             tile.entity.health = health;
+
+            if(tile.entity.damaged()){
+                world.indexer.notifyTileDamaged(tile.entity);
+            }
         }
     }
 
@@ -151,7 +155,9 @@ public class TileEntity extends BaseEntity implements TargetTrait, HealthTrait{
 
         if(health <= 0){
             Call.onTileDestroyed(tile);
-        }else if(preHealth >= maxHealth() - 0.00001f && health < maxHealth() && world != null){ //when just damaged
+        }
+
+        if(preHealth >= maxHealth() - 0.00001f && health < maxHealth() && world != null){ //when just damaged
             world.indexer.notifyTileDamaged(this);
         }
     }