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 1cf6eb1b578561dfd9e734843fb87e477c7bde9e..d1b2b8c339449d57890fda5a8ff43786bbdd227d 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -414,4 +414,10 @@ 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 b92c2d5f9ad3936f619b51c79379983e3231e700..91cf7728aee475cb36f2c02bbfb7e3d2e0d00576 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -92,9 +92,16 @@ 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.withSize(2, ItemStack.EMPTY);
         this.armorItems = NonNullList.withSize(4, ItemStack.EMPTY);
         this.headPose = ArmorStand.DEFAULT_HEAD_POSE;
@@ -191,6 +198,7 @@ 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
@@ -241,6 +249,7 @@ public class ArmorStand extends LivingEntity {
         }
 
         nbt.put("Pose", this.writePose());
+        if (this.canTickSetByAPI) nbt.putBoolean("Paper.CanTickOverride", this.canTick); // Paper - persist no tick setting
     }
 
     @Override
@@ -272,6 +281,12 @@ public class ArmorStand extends LivingEntity {
         this.setNoBasePlate(nbt.getBoolean("NoBasePlate"));
         this.setMarker(nbt.getBoolean("Marker"));
         this.noPhysics = !this.hasPhysics();
+        // Paper start - persist no tick
+        if (nbt.contains("Paper.CanTickOverride")) {
+            this.canTick = nbt.getBoolean("Paper.CanTickOverride");
+            this.canTickSetByAPI = true;
+        }
+        // Paper end
         CompoundTag nbttagcompound1 = nbt.getCompound("Pose");
 
         this.readPose(nbttagcompound1);
@@ -653,7 +668,29 @@ 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)) {
@@ -776,31 +813,37 @@ public class ArmorStand extends LivingEntity {
     public void setHeadPose(Rotations angle) {
         this.headPose = angle;
         this.entityData.set(ArmorStand.DATA_HEAD_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setBodyPose(Rotations angle) {
         this.bodyPose = angle;
         this.entityData.set(ArmorStand.DATA_BODY_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setLeftArmPose(Rotations angle) {
         this.leftArmPose = angle;
         this.entityData.set(ArmorStand.DATA_LEFT_ARM_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setRightArmPose(Rotations angle) {
         this.rightArmPose = angle;
         this.entityData.set(ArmorStand.DATA_RIGHT_ARM_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setLeftLegPose(Rotations angle) {
         this.leftLegPose = angle;
         this.entityData.set(ArmorStand.DATA_LEFT_LEG_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public void setRightLegPose(Rotations angle) {
         this.rightLegPose = angle;
         this.entityData.set(ArmorStand.DATA_RIGHT_LEG_POSE, angle);
+        this.noTickPoseDirty = true; // Paper - Allow updates when not ticking
     }
 
     public Rotations getHeadPose() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
index 06cedeea447f53d100e32a6eba6f83b4719cb231..82b9ee993b0d2e7e0685231f7bad2b85756ec959 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftArmorStand.java
@@ -238,5 +238,16 @@ public class CraftArmorStand extends CraftLivingEntity implements ArmorStand {
     public void setCanMove(boolean move) {
         getHandle().canMove = move;
     }
+
+    @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
 }
