WIP campaign difficulty dialog

core/src/mindustry/game/CampaignRules.java

@@ -0,0 +1,15 @@
+package mindustry.game;
+
+public class CampaignRules{
+    public Difficulty difficulty = Difficulty.normal;
+    public boolean fog;
+    public boolean showSpawns;
+    public boolean sectorInvasion;
+
+    public void apply(Rules rules){
+        rules.staticFog = rules.fog = fog;
+        rules.showSpawns = showSpawns;
+        rules.teams.get(rules.waveTeam).blockHealthMultiplier = difficulty.enemyHealthMultiplier;
+        rules.teams.get(rules.waveTeam).unitHealthMultiplier = difficulty.enemyHealthMultiplier;
+    }
+}

core/src/mindustry/game/Difficulty.java

@@ -0,0 +1,26 @@
+package mindustry.game;
+
+import arc.*;
+
+public enum Difficulty{
+    //TODO these need tweaks
+    easy(1f, 0.75f, 1.5f),
+    normal(1f, 1f, 1f),
+    hard(1.25f, 1.5f, 0.6f),
+    eradication(1.5f, 2f, 0.4f);
+
+    public static final Difficulty[] all = values();
+
+    //TODO add more fields
+    public float enemyHealthMultiplier, enemySpawnMultiplier, waveTimeMultiplier;
+
+    Difficulty(float enemyHealthMultiplier, float enemySpawnMultiplier, float waveTimeMultiplier){
+        this.enemySpawnMultiplier = enemySpawnMultiplier;
+        this.waveTimeMultiplier = waveTimeMultiplier;
+        this.enemyHealthMultiplier = enemyHealthMultiplier;
+    }
+
+    public String localized(){
+        return Core.bundle.get("difficulty." + name());
+    }
+}

core/src/mindustry/game/Universe.java

@@ -252,7 +252,7 @@ public class Universe{
                     }
 
                     //queue random invasions
-                    if(!sector.isAttacked() && sector.planet.allowSectorInvasion && sector.info.minutesCaptured > invasionGracePeriod && sector.info.hasSpawns){
+                    if(!sector.isAttacked() && sector.planet.campaignRules.sectorInvasion && sector.info.minutesCaptured > invasionGracePeriod && sector.info.hasSpawns){
                         int count = sector.near().count(s -> s.hasEnemyBase() && !s.hasBase());
 
                         //invasion chance depends on # of nearby bases