Customizable Fragging Angle (#2006)

* Customizable Fragging Angle

* I did it wrong.

* Undo that last change.

* Anuke told me to make it just forwards

* Thanks Anuke

My inexperience is very evident.

core/src/mindustry/entities/bullet/BulletType.java

@@ -64,6 +64,7 @@ public abstract class BulletType extends Content{
 
     //additional effects
 
+    public float fragCone = 360f;
     public int fragBullets = 9;
     public float fragVelocityMin = 0.2f, fragVelocityMax = 1f;
     public BulletType fragBullet = null;
@@ -117,7 +118,7 @@ public abstract class BulletType extends Content{
         if(fragBullet != null){
             for(int i = 0; i < fragBullets; i++){
                 float len = Mathf.random(1f, 7f);
-                float a = Mathf.random(360f);
+                float a = b.rotation() + Mathf.range(fragCone/2);
                 fragBullet.create(b, x + Angles.trnsx(a, len), y + Angles.trnsy(a, len), a, Mathf.random(fragVelocityMin, fragVelocityMax));
             }
         }