From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: kashike <kashike@vq.lc>
Date: Wed, 15 Aug 2018 01:26:09 -0700
Subject: [PATCH] Allow disabling armour stand ticking


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 3562950df4868b1393790b1a1ff1fe0dc589c155..5ab0e7183e48134b7a0f736462516b1a8a333b04 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -384,4 +384,10 @@ public class PaperWorldConfig {
     private void armorStandEntityLookups() {
         armorStandEntityLookups = getBoolean("armor-stands-do-collision-entity-lookups", true);
     }
+
+    public boolean armorStandTick = true;
+    private void armorStandTick() {
+        this.armorStandTick = this.getBoolean("armor-stands-tick", this.armorStandTick);
+        log("ArmorStand ticking is " + (this.armorStandTick ? "enabled" : "disabled") + " by default");
+    }
 }
diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
index 06e52a0c5decf717e35c605d6bcb46c3c7b29656..2994eee1d381af2c9ff3649dd48a2ae14c38c9d7 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -77,9 +77,16 @@ public class ArmorStand extends LivingEntity {
     public Rotations leftLegPose;
     public Rotations rightLegPose;
     public boolean canMove = true; // Paper
+    // Paper start - Allow ArmorStands not to tick
+    public boolean canTick = true;
+    public boolean canTickSetByAPI = false;
+    private boolean noTickPoseDirty = false;
+    private boolean noTickEquipmentDirty = false;
+    // Paper end
 
     public ArmorStand(EntityType<? extends ArmorStand> type, Level world) {
         super(type, world);
+        if (world != null) this.canTick = world.paperConfig.armorStandTick; // Paper - armour stand ticking
         this.handItems = NonNullList.a(2, ItemStack.EMPTY);
         this.armorItems = NonNullList.a(4, ItemStack.EMPTY);
         this.headPose = ArmorStand.DEFAULT_HEAD_POSE;
@@ -175,6 +182,7 @@ public class ArmorStand extends LivingEntity {
                 this.armorItems.set(enumitemslot.getIndex(), itemstack);
         }
 
+        this.noTickEquipmentDirty = true; // Paper - Allow equipment to be updated even when tick disabled
     }
 
     @Override
@@ -255,6 +263,7 @@ public class ArmorStand extends LivingEntity {
         }
 
         tag.put("Pose", this.writePose());
+        if (this.canTickSetByAPI) tag.putBoolean("Paper.CanTickOverride", this.canTick); // Paper - persist no tick setting
     }
 
     @Override
@@ -286,6 +295,12 @@ public class ArmorStand extends LivingEntity {
         this.setNoBasePlate(tag.getBoolean("NoBasePlate"));
         this.setMarker(tag.getBoolean("Marker"));
         this.noPhysics = !this.hasPhysics();
+        // Paper start - persist no tick
+        if (tag.contains("Paper.CanTickOverride")) {
+            this.canTick = tag.getBoolean("Paper.CanTickOverride");
+            this.canTickSetByAPI = true;
+        }
+        // Paper end
         CompoundTag nbttagcompound1 = tag.getCompound("Pose");
 
         this.readPose(nbttagcompound1);
@@ -641,7 +656,29 @@ public class ArmorStand extends LivingEntity {
 
     @Override
     public void tick() {
+        // Paper start
+        if (!this.canTick) {
+            if (this.noTickPoseDirty) {
+                this.noTickPoseDirty = false;
+                this.updatePose();
+            }
+
+            if (this.noTickEquipmentDirty) {
+                this.noTickEquipmentDirty = false;
+                this.detectEquipmentUpdates();
+            }
+
+            return;
+        }
+        // Paper end
+
         super.tick();
+        // Paper start - Split into separate method
+        updatePose();
+    }
+
+    public void updatePose() {
+        // Paper end
         Rotations vector3f = (Rotations) this.entityData.get(ArmorStand.DATA_HEAD_POSE);
 
         if (!this.headPose.equals(vector3f)) {
@@ -764,29 +801,36 @@ public class ArmorStand extends LivingEntity {
     public void setHeadPose(Rotations vector3f) {
         this.headPose = vector3f;
         this.entityData.set(ArmorStand.DATA_HEAD_POSE, vector3f);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setBodyPose(Rotations vector3f) {
         this.bodyPose = vector3f;
         this.entityData.set(ArmorStand.DATA_BODY_POSE, vector3f);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setLeftArmPose(Rotations vector3f) {
         this.leftArmPose = vector3f;
         this.entityData.set(ArmorStand.DATA_LEFT_ARM_POSE, vector3f);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setRightArmPose(Rotations vector3f) {
         this.rightArmPose = vector3f;
         this.entityData.set(ArmorStand.DATA_RIGHT_ARM_POSE, vector3f);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setLeftLegPose(Rotations vector3f) {
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
         this.leftLegPose = vector3f;
         this.entityData.set(ArmorStand.DATA_LEFT_LEG_POSE, vector3f);
+
     }
 
     public void setRightLegPose(Rotations vector3f) {
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
         this.rightLegPose = vector3f;
         this.entityData.set(ArmorStand.DATA_RIGHT_LEG_POSE, vector3f);
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
index d4da5214a39b718671dcaf687cb0ff8668ce9728..8363b1b2267da30cda2fb8ea4e844598e20e1422 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
@@ -311,5 +311,16 @@ public class CraftArmorStand extends CraftLivingEntity implements ArmorStand {
     public boolean isSlotDisabled(org.bukkit.inventory.EquipmentSlot slot) {
         return getHandle().isSlotDisabled(org.bukkit.craftbukkit.CraftEquipmentSlot.getNMS(slot));
     }
+
+    @Override
+    public boolean canTick() {
+        return this.getHandle().canTick;
+    }
+
+    @Override
+    public void setCanTick(final boolean tick) {
+        this.getHandle().canTick = tick;
+        this.getHandle().canTickSetByAPI = true;
+    }
     // Paper end
 }