smooth display motion via teleport_duration=1 (no desync)

src/main/java/me/sashegdev/blackknife/BlackKnifeListener.java

@@ -356,6 +356,7 @@ public class BlackKnifeListener implements Listener {
                 d.setViewRange(64);
             });
             EntityTracker.mark(disp);
+            EntityTracker.smooth(disp);
             Vector vel = new Vector(0, -0.35 - Math.random() * 0.1, 0);
             vel.add(new Vector((Math.random() - 0.5) * 0.08, 0, (Math.random() - 0.5) * 0.08));
             new BukkitRunnable() {
@@ -381,6 +382,7 @@ public class BlackKnifeListener implements Listener {
                             d.setViewRange(64);
                         });
                         EntityTracker.mark(shard);
+                        EntityTracker.smooth(shard);
                         new BukkitRunnable() {
                             @Override public void run() {
                             if (!shard.isValid()) { cancel(); return; }

src/main/java/me/sashegdev/blackknife/DiamondAttack.java

@@ -26,6 +26,7 @@ public class DiamondAttack {
             d.setViewRange(64);
         });
         EntityTracker.mark(crystal);
+        EntityTracker.smooth(crystal);
         p.getWorld().playSound(spawn, Sound.BLOCK_AMETHYST_BLOCK_PLACE, 1f, 0.9f);
         p.getWorld().playSound(spawn, Sound.BLOCK_AMETHYST_BLOCK_CHIME, 1f, 1.5f);
         Vector vel = dir.clone().multiply(1.5);
@@ -53,6 +54,7 @@ public class DiamondAttack {
                         s.setViewRange(64);
                     });
                     EntityTracker.mark(shard);
+                    EntityTracker.smooth(shard);
                     Vector sv = d.clone().multiply(0.4);
                     new BukkitRunnable() {
                         @Override public void run() {
@@ -125,6 +127,7 @@ public class DiamondAttack {
                         s.setViewRange(64);
                     });
                     EntityTracker.mark(shard);
+                    EntityTracker.smooth(shard);
                     Vector sv = d.clone().multiply(0.4);
                     new BukkitRunnable() {
                         @Override public void run() {

src/main/java/me/sashegdev/blackknife/DiamondTripleAttack.java

@@ -48,6 +48,7 @@ public class DiamondTripleAttack {
             d.setTransformation(new org.bukkit.util.Transformation(new org.joml.Vector3f(-0.45f, -0.45f, -0.45f), new org.joml.AxisAngle4f(), new org.joml.Vector3f(0.9f, 0.9f, 0.9f), new org.joml.AxisAngle4f()));
         });
         EntityTracker.mark(shard);
+        EntityTracker.smooth(shard);
         BlackKnifePlugin plugin = BlackKnifePlugin.getPlugin(BlackKnifePlugin.class);
         Vector initDir = target.clone().subtract(spawn).toVector().normalize().multiply(1.4);
         new BukkitRunnable() {

src/main/java/me/sashegdev/blackknife/EntityTracker.java

@@ -18,6 +18,10 @@ public class EntityTracker {
         tracked.remove(e.getUniqueId());
     }
 
+    public static void smooth(Display e) {
+        try { e.setTeleportDuration(1); } catch (Exception ignored) {}
+    }
+
     public static int cleanup(BlackKnifePlugin plugin) {
         int count = 0;
         for (var world : plugin.getServer().getWorlds()) {

src/main/java/me/sashegdev/blackknife/GrenadeAttack.java

@@ -55,6 +55,7 @@ public class GrenadeAttack {
                     new org.joml.AxisAngle4f()));
         });
         EntityTracker.mark(nade);
+        EntityTracker.smooth(nade);
         p.getWorld().playSound(spawn, Sound.ENTITY_SNOWBALL_THROW, 1f, 0.7f);
         BlackKnifePlugin plugin = BlackKnifePlugin.getPlugin(BlackKnifePlugin.class);
 

src/main/java/me/sashegdev/blackknife/LungeAttack.java

@@ -40,6 +40,7 @@ public class LungeAttack {
             d.setViewRange(64);
         });
         EntityTracker.mark(catalyst);
+        EntityTracker.smooth(catalyst);
         p.getWorld().playSound(start, Sound.BLOCK_SCULK_CATALYST_BLOOM, 1f, 0.7f);
         double catSpeed = 3.0;
 
@@ -154,6 +155,7 @@ public class LungeAttack {
                     new org.joml.AxisAngle4f()));
         });
         EntityTracker.mark(sword);
+        EntityTracker.smooth(sword);
         new BukkitRunnable() {
             long hold = 5;
             boolean launched = false;
@@ -222,6 +224,7 @@ public class LungeAttack {
                     new org.joml.AxisAngle4f()));
         });
         EntityTracker.mark(sword);
+        EntityTracker.smooth(sword);
         p.getWorld().playSound(gazePoint, Sound.ENTITY_PLAYER_ATTACK_SWEEP, 1f, 0.5f);
         p.getWorld().playSound(gazePoint, Sound.BLOCK_ANVIL_LAND, 0.6f, 1.4f);
         Vector vel = new Vector(0, -1.2, 0);
@@ -370,6 +373,7 @@ public class LungeAttack {
                     new org.joml.AxisAngle4f()));
         });
         EntityTracker.mark(sword);
+        EntityTracker.smooth(sword);
         Vector vel = new Vector(0, -fallSpeed, 0);
         p.getWorld().playSound(spawn, Sound.ENTITY_PLAYER_ATTACK_SWEEP, 0.6f, 0.7f);
         new BukkitRunnable() {
@@ -463,6 +467,7 @@ public class LungeAttack {
                                 new org.joml.AxisAngle4f()));
                     });
                     EntityTracker.mark(sword);
+                    EntityTracker.smooth(sword);
                     spawn.getWorld().playSound(spawn, Sound.ENTITY_PLAYER_ATTACK_SWEEP, 0.8f, 0.5f);
 
                     new BukkitRunnable() {

src/main/java/me/sashegdev/blackknife/PhantomBarrageAttack.java

@@ -34,6 +34,7 @@ public class PhantomBarrageAttack {
                 d.setTransformation(new org.bukkit.util.Transformation(new org.joml.Vector3f(-0.35f,-0.35f,-0.35f),new org.joml.AxisAngle4f(),new org.joml.Vector3f(0.7f,0.7f,0.7f),new org.joml.AxisAngle4f()));
             });
             EntityTracker.mark(orb);
+            EntityTracker.smooth(orb);
             new BukkitRunnable() {
                 int ticks = 0;
                 Location cur = spawn.clone();

src/main/java/me/sashegdev/blackknife/SwoonHandler.java

@@ -169,6 +169,7 @@ public class SwoonHandler implements Listener {
             d.getPersistentDataContainer().set(SWOONED, PersistentDataType.BYTE, (byte) 1);
         });
         EntityTracker.mark(td);
+        EntityTracker.smooth(td);
         displays.put(tp.getUniqueId(), td);
     }