pathfinding update

src/main/java/net/minestom/server/entity/pathfinding/PFBlockDescription.java

@@ -18,7 +18,7 @@ public class PFBlockDescription implements IBlockDescription {
 
     @Override
     public boolean isClimbable() {
-        return false;
+        return block == Block.LADDER;
     }
 
     @Override
@@ -43,6 +43,6 @@ public class PFBlockDescription implements IBlockDescription {
 
     @Override
     public boolean isIncinerating() {
-        return false;
+        return block == Block.LAVA || block == Block.FIRE;
     }
 }

src/main/java/net/minestom/server/entity/pathfinding/PFBlockObject.java

@@ -27,7 +27,7 @@ public class PFBlockObject implements IBlockObject {
 
     @Override
     public boolean isClimbable() {
-        return false;
+        return block == Block.LADDER;
     }
 
     @Override
@@ -52,6 +52,6 @@ public class PFBlockObject implements IBlockObject {
 
     @Override
     public boolean isIncinerating() {
-        return false;
+        return block == Block.LAVA || block == Block.FIRE;
     }
 }

src/main/java/net/minestom/server/entity/pathfinding/PFColumnarSpace.java

@@ -21,8 +21,8 @@ public class PFColumnarSpace implements IColumnarSpace {
 
     @Override
     public IBlockDescription blockAt(int x, int y, int z) {
-        short blockId = chunk.getBlockId(x, y, z);
-        Block block = Block.fromId(blockId);
+        final short blockId = chunk.getBlockId(x, y, z);
+        final Block block = Block.fromId(blockId);
         return new PFBlockDescription(block);
     }
 

src/main/java/net/minestom/server/entity/pathfinding/PFInstanceSpace.java

@@ -21,16 +21,21 @@ public class PFInstanceSpace implements IInstanceSpace {
 
     @Override
     public IBlockObject blockObjectAt(int x, int y, int z) {
-        short blockId = instance.getBlockId(x, y, z);
-        Block block = Block.fromId(blockId);
+        final short blockId = instance.getBlockId(x, y, z);
+        final Block block = Block.fromId(blockId);
         return new PFBlockObject(block);
     }
 
     @Override
     public IColumnarSpace columnarSpaceAt(int cx, int cz) {
-        Chunk chunk = instance.getChunk(cx, cz);
-        PFColumnarSpace columnarSpace =
-                chunkSpaceMap.computeIfAbsent(chunk, c -> new PFColumnarSpace(this, c));
+        final Chunk chunk = instance.getChunk(cx, cz);
+        final PFColumnarSpace columnarSpace =
+                chunkSpaceMap.computeIfAbsent(chunk, c -> {
+                    final PFColumnarSpace cs = new PFColumnarSpace(this, c);
+                    c.setColumnarSpace(cs);
+                    return cs;
+                });
+
         return columnarSpace;
     }
 

src/main/java/net/minestom/server/instance/Chunk.java

@@ -1,5 +1,6 @@
 package net.minestom.server.instance;
 
+import com.extollit.gaming.ai.path.model.ColumnarOcclusionFieldList;
 import io.netty.buffer.ByteBuf;
 import it.unimi.dsi.fastutil.ints.*;
 import net.minestom.server.MinecraftServer;
@@ -7,6 +8,8 @@ import net.minestom.server.Viewable;
 import net.minestom.server.data.Data;
 import net.minestom.server.data.SerializableData;
 import net.minestom.server.entity.Player;
+import net.minestom.server.entity.pathfinding.PFBlockDescription;
+import net.minestom.server.entity.pathfinding.PFColumnarSpace;
 import net.minestom.server.event.player.PlayerChunkLoadEvent;
 import net.minestom.server.event.player.PlayerChunkUnloadEvent;
 import net.minestom.server.instance.block.Block;
@@ -63,6 +66,9 @@ public final class Chunk implements Viewable {
     // Block entities
     private Set<Integer> blockEntities = new CopyOnWriteArraySet<>();
 
+    // Path finding
+    private PFColumnarSpace columnarSpace;
+
     // Cache
     private boolean loaded = true;
     private Set<Player> viewers = new CopyOnWriteArraySet<>();
@@ -146,6 +152,12 @@ public final class Chunk implements Viewable {
         }
 
         this.packetUpdated = false;
+
+        if (columnarSpace != null) {
+            final ColumnarOcclusionFieldList columnarOcclusionFieldList = columnarSpace.occlusionFields();
+            final PFBlockDescription blockDescription = new PFBlockDescription(Block.fromId(blockId));
+            columnarOcclusionFieldList.onBlockChanged(x, y, z, blockDescription, 0);
+        }
     }
 
     public void setBlockData(int x, int y, int z, Data data) {
@@ -278,6 +290,26 @@ public final class Chunk implements Viewable {
         return blockEntities;
     }
 
+    /**
+     * Get the columnar space linked to this chunk
+     * <p>
+     * Used internally by the pathfinder
+     *
+     * @return this chunk columnar space
+     */
+    public PFColumnarSpace getColumnarSpace() {
+        return columnarSpace;
+    }
+
+    /**
+     * Change this chunk columnar space
+     *
+     * @param columnarSpace the new columnar space
+     */
+    public void setColumnarSpace(PFColumnarSpace columnarSpace) {
+        this.columnarSpace = columnarSpace;
+    }
+
     public void setFullDataPacket(ByteBuf fullDataPacket) {
         this.fullDataPacket = fullDataPacket;
         this.packetUpdated = true;