funny sand

src/main/java/xyz/hynse/bbsdfia/Bbsdfia.java

@@ -0,0 +1,82 @@
+package xyz.hynse.bbsdfia;
+
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.FallingBlock;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityChangeBlockEvent;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.util.Vector;
+
+public class Bbsdfia extends JavaPlugin implements Listener {
+    @Override
+    public void onEnable() {
+        super.onEnable();
+        getServer().getPluginManager().registerEvents(this, this);
+        getServer().getLogger().info("Bbsdfia plugin started");
+    }
+
+    @Override
+    public void onDisable() {
+        super.onDisable();
+        getServer().getLogger().info("Bbsdfia plugin stopped");
+    }
+
+    @EventHandler
+    public void onFallingBlockToBlock(EntityChangeBlockEvent e){
+        if(e.getEntityType() == EntityType.FALLING_BLOCK){
+            Entity entity = e.getEntity();
+            Location loc = entity.getLocation();
+            Vector vel = entity.getVelocity();
+            Block movingTo = getBlockMovingTo(loc, vel);
+
+            if(movingTo != null && movingTo.getType() == Material.END_PORTAL){
+                Location spawnLoc = movingTo.getLocation();
+                spawnLoc.setX(spawnLoc.getX()+0.5);
+                spawnLoc.setY(spawnLoc.getY()+0.5);
+                spawnLoc.setZ(spawnLoc.getZ()+0.5);
+
+                FallingBlock dummy = loc.getWorld().spawnFallingBlock(spawnLoc, ((FallingBlock) entity).getBlockData());
+                Vector dummyVel = vel.clone();
+                dummyVel.setY(-dummyVel.getY());
+                dummyVel.multiply(new Vector(2, 2, 2)); // double the velocity
+
+                // add a constant downward velocity to simulate gravity
+                dummyVel.add(new Vector(0, 0.3, 0));
+
+                dummy.setVelocity(dummyVel);
+            }
+        }
+    }
+
+
+    Block getBlockMovingTo(Location loc, Vector vel){
+        double absMax = 0, max = 0;
+        char dir = ' ';
+        Block relative = null;
+        if(Math.abs(vel.getX()) > absMax){
+            max = vel.getX();
+            absMax = Math.abs(vel.getX());
+            dir = 'x';
+        }
+        if(Math.abs(vel.getY()) > absMax){
+            max = vel.getY();
+            absMax = Math.abs(vel.getY());
+            dir = 'y';
+        }
+        if(Math.abs(vel.getZ()) > absMax){
+            max = vel.getZ();
+            dir = 'z';
+        }
+        switch (dir) {
+            case 'x' -> relative = loc.getBlock().getRelative((int) Math.signum(max), 0, 0);
+            case 'y' -> relative = loc.getBlock().getRelative(0, (int) Math.signum(max), 0);
+            case 'z' -> relative = loc.getBlock().getRelative(0, 0, (int) Math.signum(max));
+        }
+        return relative;
+    }
+}