Minor improvements to jetpacks (#3798)

Author: TarLaboratories

src/main/java/com/gregtechceu/gtceu/common/data/GTItems.java

@@ -2452,7 +2452,7 @@ public static ItemEntry<ComponentItem> createFluidCell(Material mat, int capacit
     public static ItemEntry<ArmorComponentItem> ELECTRIC_JETPACK = REGISTRATE
             .item("electric_jetpack",
                     (p) -> new ArmorComponentItem(GTArmorMaterials.JETPACK, ArmorItem.Type.CHESTPLATE, p)
-                            .setArmorLogic(new Jetpack(30,
+                            .setArmorLogic(new Jetpack(15,
                                     1_000_000L * (long) Math.max(1,
                                             Math.pow(4, ConfigHolder.INSTANCE.tools.voltageTierImpeller - 2)),
                                     ConfigHolder.INSTANCE.tools.voltageTierImpeller)))
@@ -2466,7 +2466,7 @@ public static ItemEntry<ComponentItem> createFluidCell(Material mat, int capacit
     public static ItemEntry<ArmorComponentItem> ELECTRIC_JETPACK_ADVANCED = REGISTRATE
             .item("advanced_electric_jetpack",
                     (p) -> new ArmorComponentItem(GTArmorMaterials.JETPACK, ArmorItem.Type.CHESTPLATE, p)
-                            .setArmorLogic(new AdvancedJetpack(512,
+                            .setArmorLogic(new AdvancedJetpack(256,
                                     6_400_000L * (long) Math.max(1,
                                             Math.pow(4, ConfigHolder.INSTANCE.tools.voltageTierAdvImpeller - 4)),
                                     ConfigHolder.INSTANCE.tools.voltageTierAdvImpeller)))

src/main/java/com/gregtechceu/gtceu/common/item/armor/IJetpack.java

@@ -50,6 +50,10 @@ default double getSidewaysSpeed() {
         return 0.0D;
     }
 
+    default boolean removeMiningSpeedPenalty() {
+        return true;
+    }
+
     @Nullable
     default ParticleOptions getParticle() {
         return ParticleTypes.LARGE_SMOKE;

src/main/java/com/gregtechceu/gtceu/forge/ForgeCommonEventListener.java

@@ -618,4 +618,16 @@ public static void remapIds(MissingMappingsEvent event) {
             });
         }
     }
+
+    @SubscribeEvent
+    public static void breakSpeed(PlayerEvent.BreakSpeed event) {
+        Player player = event.getEntity();
+        for (ItemStack stack : player.getArmorSlots()) {
+            if (stack.getItem() instanceof ArmorComponentItem componentItem) {
+                if (componentItem.getArmorLogic() instanceof IJetpack jetpack && jetpack.removeMiningSpeedPenalty()) {
+                    if (!player.onGround() || player.isUnderWater()) event.setNewSpeed(event.getOriginalSpeed() * 5);
+                }
+            }
+        }
+    }
 }