Formation cleanup

core/src/mindustry/ai/formations/FormationMember.java

@@ -11,4 +11,6 @@ import arc.math.geom.*;
 public interface FormationMember{
     /** Returns the target location of this formation member. */
     Vec3 formationPos();
+
+    float formationSize();
 }

core/src/mindustry/ai/formations/FormationPattern.java

@@ -12,6 +12,8 @@ import arc.math.geom.*;
  */
 public abstract class FormationPattern{
     public int slots;
+    /** Spacing between members. */
+    public float spacing = 20f;
 
     /** Returns the location of the given slot index. */
     public abstract Vec3 calculateSlotLocation(Vec3 out, int slot);

core/src/mindustry/ai/formations/patterns/ArrowFormation.java

@@ -0,0 +1,26 @@
+package mindustry.ai.formations.patterns;
+
+import arc.math.geom.*;
+import mindustry.ai.formations.*;
+
+public class ArrowFormation extends FormationPattern{
+    //total triangular numbers
+    private static final int totalTris = 30;
+    //triangular number table
+    private static final int[] triTable = new int[totalTris];
+
+    //calculat triangular numbers
+    static{
+        int sum = 0;
+        for(int i = 0; i < totalTris; i++){
+            triTable[i] = sum;
+            sum += (i + 1);
+        }
+    }
+
+    @Override
+    public Vec3 calculateSlotLocation(Vec3 out, int slot){
+        //TODO
+        return out;
+    }
+}

core/src/mindustry/ai/formations/patterns/SquareFormation.java

@@ -5,7 +5,6 @@ import arc.math.geom.*;
 import mindustry.ai.formations.*;
 
 public class SquareFormation extends FormationPattern{
-    public float spacing = 20;
 
     @Override
     public Vec3 calculateSlotLocation(Vec3 out, int slot){

core/src/mindustry/ai/types/FormationAI.java

@@ -60,6 +60,15 @@ public class FormationAI extends AIController implements FormationMember{
         }
     }
 
+    @Override
+    public float formationSize(){
+        if(unit instanceof Commanderc && ((Commanderc)unit).isCommanding()){
+            //TODO return formation size
+            //eturn ((Commanderc)unit).formation().
+        }
+        return unit.hitSize * 2f;
+    }
+
     @Override
     public boolean isBeingControlled(Unit player){
         return leader == player;