Add skeleton bow accuracy option

Author: BillyGalbreath

patches/server/0253-Add-skeleton-bow-accuracy-option.patch

@@ -12,3 +12,12 @@
                  this.setItemSlot(EquipmentSlot.HEAD, new ItemStack(random.nextFloat() < 0.1F ? Blocks.JACK_O_LANTERN : Blocks.CARVED_PUMPKIN));
                  this.armorDropChances[EquipmentSlot.HEAD.getIndex()] = 0.0F;
              }
+@@ -217,7 +_,7 @@
+             if (event.getProjectile() == arrow.getBukkitEntity()) {
+             // CraftBukkit end
+             Projectile.spawnProjectileUsingShoot(
+-                arrow, serverLevel, projectile, d, d1 + squareRoot * 0.2F, d2, 1.6F, 14 - serverLevel.getDifficulty().getId() * 4
++                arrow, serverLevel, projectile, d, d1 + squareRoot * 0.2F, d2, 1.6F, serverLevel.purpurConfig.skeletonBowAccuracyMap.getOrDefault(serverLevel.getDifficulty().getId(), (float) (14 - serverLevel.getDifficulty().getId() * 4))  // Purpur - skeleton bow accuracy option
+             );
+             } // CraftBukkit
+         }

purpur-server/minecraft-patches/sources/net/minecraft/world/entity/monster/AbstractSkeleton.java.patch

@@ -2608,6 +2608,8 @@ private void silverfishSettings() {
     public boolean skeletonAlwaysDropExp = false;
     public double skeletonHeadVisibilityPercent = 0.5D;
     public int skeletonFeedWitherRoses = 0;
+    public String skeletonBowAccuracy = "14 - difficulty * 4";
+    public Map<Integer, Float> skeletonBowAccuracyMap = new HashMap<>();
     private void skeletonSettings() {
         skeletonRidable = getBoolean("mobs.skeleton.ridable", skeletonRidable);
         skeletonRidableInWater = getBoolean("mobs.skeleton.ridable-in-water", skeletonRidableInWater);
@@ -2623,6 +2625,18 @@ private void skeletonSettings() {
         skeletonAlwaysDropExp = getBoolean("mobs.skeleton.always-drop-exp", skeletonAlwaysDropExp);
         skeletonHeadVisibilityPercent = getDouble("mobs.skeleton.head-visibility-percent", skeletonHeadVisibilityPercent);
         skeletonFeedWitherRoses = getInt("mobs.skeleton.feed-wither-roses", skeletonFeedWitherRoses);
+        final String defaultSkeletonBowAccuracy = skeletonBowAccuracy;
+        skeletonBowAccuracy = getString("mobs.skeleton.bow-accuracy", skeletonBowAccuracy);
+        for (int i = 1; i < 4; i++) {
+            final float divergence;
+            try {
+                divergence = ((Number) Entity.scriptEngine.eval("let difficulty = " + i + "; " + skeletonBowAccuracy)).floatValue();
+            } catch (javax.script.ScriptException e) {
+                e.printStackTrace();
+                break;
+            }
+            skeletonBowAccuracyMap.put(i, divergence);
+        }
     }
 
     public boolean skeletonHorseRidable = false;