Display incompatible mods in browser / Shoot alternate mirror fix

core/src/mindustry/entities/pattern/ShootAlternate.java

@@ -1,5 +1,6 @@
 package mindustry.entities.pattern;
 
+import arc.math.*;
 import arc.util.*;
 
 public class ShootAlternate extends ShootPattern{
@@ -9,6 +10,8 @@ public class ShootAlternate extends ShootPattern{
     public float spread = 5f;
     /** offset of barrel to start on */
     public int barrelOffset = 0;
+    /** If true, the shoot order is flipped. */
+    public boolean mirror = false;
 
     public ShootAlternate(float spread){
         this.spread = spread;
@@ -17,11 +20,16 @@ public class ShootAlternate extends ShootPattern{
     public ShootAlternate(){
     }
 
+    @Override
+    public void flip(){
+        mirror = !mirror;
+    }
+
     @Override
     public void shoot(int totalShots, BulletHandler handler, @Nullable Runnable barrelIncrementer){
         for(int i = 0; i < shots; i++){
             float index = ((totalShots + i + barrelOffset) % barrels) - (barrels-1)/2f;
-            handler.shoot(index * spread, 0, 0f, firstShotDelay + shotDelay * i);
+            handler.shoot(index * spread * -Mathf.sign(mirror), 0, 0f, firstShotDelay + shotDelay * i);
             if(barrelIncrementer != null) barrelIncrementer.run();
         }
     }