new: entity.fast_hand_swing: only calculate hand swing progress when …

…hand is swinging

src/main/java/me/jellysquid/mods/lithium/common/config/LithiumConfig.java

@@ -89,6 +89,7 @@ private LithiumConfig() {
         this.addMixinRule("entity.data_tracker.no_locks", true);
         this.addMixinRule("entity.data_tracker.use_arrays", true);
         this.addMixinRule("entity.fast_elytra_check", true);
+        this.addMixinRule("entity.fast_hand_swing", true);
         this.addMixinRule("entity.fast_powder_snow_check", true);
         this.addMixinRule("entity.fast_retrieval", true);
         this.addMixinRule("entity.inactive_navigations", true);

src/main/java/me/jellysquid/mods/lithium/mixin/entity/fast_hand_swing/LivingEntityMixin.java

@@ -0,0 +1,28 @@
+package me.jellysquid.mods.lithium.mixin.entity.fast_hand_swing;
+
+import net.minecraft.entity.LivingEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(LivingEntity.class)
+public abstract class LivingEntityMixin {
+    @Shadow
+    public boolean handSwinging;
+
+    @Shadow
+    public int handSwingTicks;
+
+    @Inject(
+            method = "tickHandSwing()V",
+            at = @At("HEAD"),
+            cancellable = true
+    )
+    private void skipGetDuration(CallbackInfo ci) {
+        if (!this.handSwinging && this.handSwingTicks == 0) {
+            ci.cancel();
+        }
+    }
+}

src/main/resources/lithium.mixins.json

@@ -102,6 +102,7 @@
     "entity.data_tracker.no_locks.DataTrackerMixin",
     "entity.data_tracker.use_arrays.DataTrackerMixin",
     "entity.fast_elytra_check.LivingEntityMixin",
+    "entity.fast_hand_swing.LivingEntityMixin",
     "entity.fast_powder_snow_check.LivingEntityMixin",
     "entity.fast_retrieval.SectionedEntityCacheMixin",
     "entity.inactive_navigations.DrownedEntityLeaveWaterGoalMixin",