Added basic ground AI

core/src/mindustry/game/EventType.java

@@ -72,10 +72,10 @@ public class EventType{
 
     /** Called when a zone's requirements are met. */
     public static class ZoneRequireCompleteEvent{
-        public final Zone zoneMet, zoneForMet;
+        public final SectorPreset zoneMet, zoneForMet;
         public final Objective objective;
 
-        public ZoneRequireCompleteEvent(Zone zoneMet, Zone zoneForMet, Objective objective){
+        public ZoneRequireCompleteEvent(SectorPreset zoneMet, SectorPreset zoneForMet, Objective objective){
             this.zoneMet = zoneMet;
             this.zoneForMet = zoneForMet;
             this.objective = objective;
@@ -84,9 +84,9 @@ public class EventType{
 
     /** Called when a zone's requirements are met. */
     public static class ZoneConfigureCompleteEvent{
-        public final Zone zone;
+        public final SectorPreset zone;
 
-        public ZoneConfigureCompleteEvent(Zone zone){
+        public ZoneConfigureCompleteEvent(SectorPreset zone){
             this.zone = zone;
         }
     }

core/src/mindustry/game/Objective.java

@@ -21,7 +21,7 @@ public interface Objective{
 
     }
 
-    default Zone zone(){
+    default SectorPreset zone(){
         return this instanceof ZoneObjective ? ((ZoneObjective)this).zone : null;
     }
 }

core/src/mindustry/game/Objectives.java

@@ -53,7 +53,7 @@ public class Objectives{
     public static class ZoneWave extends ZoneObjective{
         public int wave;
 
-        public ZoneWave(Zone zone, int wave){
+        public ZoneWave(SectorPreset zone, int wave){
             this.zone = zone;
             this.wave = wave;
         }
@@ -73,7 +73,7 @@ public class Objectives{
 
     public static class Launched extends ZoneObjective{
 
-        public Launched(Zone zone){
+        public Launched(SectorPreset zone){
             this.zone = zone;
         }
 
@@ -91,6 +91,6 @@ public class Objectives{
     }
 
     public abstract static class ZoneObjective implements Objective{
-        public @NonNull Zone zone;
+        public @NonNull SectorPreset zone;
     }
 }