fix block meshes

docs/src/progress/renderertodo.md

@@ -1150,6 +1150,10 @@ Add server manager for block chunk data & management
 Add endpoint to request strided block data
 Add client side handling of block endpoint
 Add server-driven block rasterizer with LOD
+Convert PhysicsEntityUtils to use generic interface to load tri geom rigid bodies
+
+(11/24/2024)
+Fix winding order on block meshes
 
 
 # TODO

src/main/java/electrosphere/client/block/BlockChunkCache.java

@@ -7,7 +7,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.Semaphore;
+import java.util.concurrent.locks.ReentrantLock;
 
 import io.github.studiorailgun.HashUtils;
 
@@ -64,16 +64,16 @@ public class BlockChunkCache {
     /**
      * The lock for thread safety
      */
-    Semaphore lock = new Semaphore(1);
+    ReentrantLock lock = new ReentrantLock();
 
     /**
      * Gets the collection of server block chunks that are cached
      * @return The collection of chunks
      */
     public Collection<BlockChunkData> getContents(){
-        lock.acquireUninterruptibly();
+        lock.lock();
         Collection<BlockChunkData> rVal = Collections.unmodifiableCollection(cacheMapFullRes.values());
-        lock.release();
+        lock.unlock();
         return rVal;
     }
 
@@ -81,13 +81,13 @@ public class BlockChunkCache {
      * Evicts all chunks in the cache
      */
     public void clear(){
-        lock.acquireUninterruptibly();
+        lock.lock();
         cacheMapFullRes.clear();
         cacheMapHalfRes.clear();
         cacheMapQuarterRes.clear();
         cacheMapEighthRes.clear();
         cacheMapSixteenthRes.clear();
-        lock.release();
+        lock.unlock();
     }
 
     /**
@@ -101,12 +101,12 @@ public class BlockChunkCache {
     public BlockChunkData get(int worldX, int worldY, int worldZ, int stride){
         BlockChunkData rVal = null;
         Long key = this.getKey(worldX, worldY, worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         queryRecencyQueue.remove(key);
         queryRecencyQueue.add(0, key);
         Map<Long,BlockChunkData> cache = this.getCache(stride);
         rVal = cache.get(key);
-        lock.release();
+        lock.unlock();
         return rVal;
     }
 
@@ -120,7 +120,7 @@ public class BlockChunkCache {
      */
     public void add(int worldX, int worldY, int worldZ, int stride, BlockChunkData chunk){
         Long key = this.getKey(worldX, worldY, worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         queryRecencyQueue.add(0, key);
         Map<Long,BlockChunkData> cache = this.getCache(stride);
         cache.put(key, chunk);
@@ -132,7 +132,7 @@ public class BlockChunkCache {
             cacheMapEighthRes.remove(oldKey);
             cacheMapSixteenthRes.remove(oldKey);
         }
-        lock.release();
+        lock.unlock();
     }
 
     /**
@@ -145,10 +145,10 @@ public class BlockChunkCache {
      */
     public boolean containsChunk(int worldX, int worldY, int worldZ, int stride){
         Long key = this.getKey(worldX,worldY,worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         Map<Long,BlockChunkData> cache = this.getCache(stride);
         boolean rVal = cache.containsKey(key);
-        lock.release();
+        lock.unlock();
         return rVal;
     }
 
@@ -172,9 +172,9 @@ public class BlockChunkCache {
      */
     public boolean chunkIsQueued(int worldX, int worldY, int worldZ){
         Long key = this.getKey(worldX,worldY,worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         boolean rVal = this.queuedChunkMap.containsKey(key);
-        lock.release();
+        lock.unlock();
         return rVal;
     }
 
@@ -186,9 +186,9 @@ public class BlockChunkCache {
      */
     public void queueChunk(int worldX, int worldY, int worldZ){
         Long key = this.getKey(worldX,worldY,worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         this.queuedChunkMap.put(key,true);
-        lock.release();
+        lock.unlock();
     }
 
     /**
@@ -200,9 +200,9 @@ public class BlockChunkCache {
      */
     public void unqueueChunk(int worldX, int worldY, int worldZ, int stride){
         Long key = this.getKey(worldX,worldY,worldZ);
-        lock.acquireUninterruptibly();
+        lock.lock();
         this.queuedChunkMap.remove(key);
-        lock.release();
+        lock.unlock();
     }
 
     /**

src/main/java/electrosphere/collision/CollisionBodyCreation.java

@@ -19,7 +19,7 @@ import org.ode4j.ode.DMass;
 import org.ode4j.ode.DSphere;
 import org.ode4j.ode.DTriMesh;
 
-import electrosphere.entity.types.terrain.TerrainChunkData;
+import electrosphere.entity.state.collidable.TriGeomData;
 
 /**
  * Utilities for creating types of rigid bodies
@@ -256,7 +256,7 @@ public class CollisionBodyCreation {
      * @param data The terrain data
      * @return The DBody
      */
-    public static DBody generateBodyFromTerrainData(CollisionEngine collisionEngine, TerrainChunkData data, long categoryBits){
+    public static DBody generateBodyFromTerrainData(CollisionEngine collisionEngine, TriGeomData data, long categoryBits){
         DBody body = null;
 
         //create trimesh

src/main/java/electrosphere/collision/PhysicsEntityUtils.java

@@ -18,9 +18,9 @@ import electrosphere.entity.EntityUtils;
 import electrosphere.entity.ServerEntityUtils;
 import electrosphere.entity.state.collidable.ClientCollidableTree;
 import electrosphere.entity.state.collidable.ServerCollidableTree;
+import electrosphere.entity.state.collidable.TriGeomData;
 import electrosphere.entity.state.physicssync.ClientPhysicsSyncTree;
 import electrosphere.entity.state.physicssync.ServerPhysicsSyncTree;
-import electrosphere.entity.types.terrain.TerrainChunkData;
 import electrosphere.game.data.collidable.CollidableTemplate;
 import electrosphere.game.server.world.ServerWorldData;
 import electrosphere.server.datacell.Realm;
@@ -487,7 +487,7 @@ public class PhysicsEntityUtils {
      * @param data The terrain description
      * @return The rigid body created (note, attachment has already been performed)
      */
-    public static void clientAttachTerrainChunkRigidBody(Entity terrain, TerrainChunkData data){
+    public static void clientAttachTriGeomRigidBody(Entity terrain, TriGeomData data){
         DBody terrainBody = CollisionBodyCreation.generateBodyFromTerrainData(Globals.clientSceneWrapper.getCollisionEngine(), data, Collidable.TYPE_STATIC_BIT);
         Collidable collidable = new Collidable(terrain,Collidable.TYPE_TERRAIN, false);
         Globals.clientSceneWrapper.getCollisionEngine().registerCollisionObject(terrainBody, collidable);
@@ -502,7 +502,7 @@ public class PhysicsEntityUtils {
      * @param data The terrain description
      * @return The rigid body created (note, attachment has already been performed)
      */
-    public static DBody serverAttachTerrainChunkRigidBody(Entity terrain, TerrainChunkData data){
+    public static DBody serverAttachTriGeomRigidBody(Entity terrain, TriGeomData data){
         Realm terrainRealm = Globals.realmManager.getEntityRealm(terrain);
         DBody terrainBody = CollisionBodyCreation.generateBodyFromTerrainData(terrainRealm.getCollisionEngine(),data,Collidable.TYPE_STATIC_BIT);
         

src/main/java/electrosphere/entity/state/collidable/TriGeomData.java

@@ -0,0 +1,20 @@
+package electrosphere.entity.state.collidable;
+
+/**
+ * A data object that can be used to generate a collidable with arbitrary geometry
+ */
+public interface TriGeomData {
+    
+    /**
+     * Gets the vertex data
+     * @return the vertex data
+     */
+    public float[] getVertices();
+
+    /**
+     * Gets the face element data
+     * @return the face element data
+     */
+    public int[] getFaceElements();
+
+}

src/main/java/electrosphere/entity/types/terrain/BlockChunkEntity.java

@@ -9,6 +9,7 @@ import org.joml.Vector3d;
 import electrosphere.client.block.BlockChunkData;
 import electrosphere.client.block.cells.BlockDrawCell;
 import electrosphere.client.block.cells.BlockTextureAtlas;
+import electrosphere.collision.PhysicsEntityUtils;
 import electrosphere.engine.Globals;
 import electrosphere.engine.assetmanager.queue.QueuedModel;
 import electrosphere.entity.ClientEntityUtils;
@@ -16,10 +17,12 @@ import electrosphere.entity.Entity;
 import electrosphere.entity.EntityCreationUtils;
 import electrosphere.entity.EntityDataStrings;
 import electrosphere.entity.EntityUtils;
+import electrosphere.entity.ServerEntityUtils;
 import electrosphere.entity.types.collision.CollisionObjUtils;
 import electrosphere.logger.LoggerInterface;
 import electrosphere.renderer.meshgen.BlockMeshgen;
 import electrosphere.renderer.meshgen.BlockMeshgen.BlockMeshData;
+import electrosphere.server.datacell.Realm;
 
 /**
  * Generates block chunk entities
@@ -63,7 +66,7 @@ public class BlockChunkEntity {
                         }));
                         EntityCreationUtils.makeEntityDrawablePreexistingModel(rVal, modelPath);
                         if(levelOfDetail == BlockChunkData.LOD_FULL_RES){
-                            // PhysicsEntityUtils.clientAttachTerrainChunkRigidBody(rVal, data);
+                            PhysicsEntityUtils.clientAttachTriGeomRigidBody(rVal, data);
                             CollisionObjUtils.clientPositionCharacter(rVal, new Vector3d(EntityUtils.getPosition(rVal)), new Quaterniond());
                         } else {
                             EntityCreationUtils.bypassShadowPass(rVal);
@@ -99,6 +102,34 @@ public class BlockChunkEntity {
         return rVal;
     }
 
+    /**
+     * Creates a block chunk entity on the server
+     * @param realm The realm
+     * @param position The position of the chunk
+     * @param weights The weights for the block chunk
+     * @param values The values of each voxel in the chunk
+     * @return The block entity
+     */
+    public static Entity serverCreateBlockChunkEntity(Realm realm, Vector3d position, BlockMeshData blockChunkData){
+        
+        Entity rVal = EntityCreationUtils.createServerEntity(realm, position);
+        if(blockChunkData.getVertices().length > 0){
+            PhysicsEntityUtils.serverAttachTriGeomRigidBody(rVal, blockChunkData);
+            rVal.putData(EntityDataStrings.TERRAIN_IS_TERRAIN, true);
+        }
+
+
+        //position entity
+        //this needs to be called at the end of this function.
+        //Burried underneath this is function call to initialize a server side entity.
+        //The server initialization logic checks what type of entity this is, if this function is called prior to its type being stored
+        //the server will not be able to synchronize it properly.
+        ServerEntityUtils.initiallyPositionEntity(realm,rVal,position);
+
+
+        return rVal;
+    }
+
     /**
      * Halts all running generation threads
      */

src/main/java/electrosphere/entity/types/terrain/TerrainChunk.java

@@ -6,6 +6,7 @@ import java.util.concurrent.Executors;
 import org.joml.Quaterniond;
 import org.joml.Vector3d;
 
+import electrosphere.client.block.BlockChunkData;
 import electrosphere.client.terrain.cells.ClientDrawCellManager;
 import electrosphere.client.terrain.cells.DrawCell;
 import electrosphere.client.terrain.cells.VoxelTextureAtlas;
@@ -64,8 +65,8 @@ public class TerrainChunk {
                     if(Globals.clientScene.containsEntity(rVal)){
                         String modelPath = ClientTerrainManager.queueTerrainGridGeneration(data, atlas, notifyTarget, toDelete);
                         EntityCreationUtils.makeEntityDrawablePreexistingModel(rVal, modelPath);
-                        if(levelOfDetail == ClientDrawCellManager.FULL_RES_LOD && data.faceElements.length > 0){
-                            PhysicsEntityUtils.clientAttachTerrainChunkRigidBody(rVal, data);
+                        if(levelOfDetail == BlockChunkData.LOD_FULL_RES && data.faceElements.length > 0){
+                            PhysicsEntityUtils.clientAttachTriGeomRigidBody(rVal, data);
                             CollisionObjUtils.clientPositionCharacter(rVal, new Vector3d(EntityUtils.getPosition(rVal)), new Quaterniond());
                         } else {
                             EntityCreationUtils.bypassShadowPass(rVal);
@@ -116,7 +117,7 @@ public class TerrainChunk {
 
         Entity rVal = EntityCreationUtils.createServerEntity(realm, position);
         if(data.vertices.length > 0){
-            PhysicsEntityUtils.serverAttachTerrainChunkRigidBody(rVal, data);
+            PhysicsEntityUtils.serverAttachTriGeomRigidBody(rVal, data);
             rVal.putData(EntityDataStrings.TERRAIN_IS_TERRAIN, true);
             // ServerEntityUtils.initiallyPositionEntity(realm, rVal, position);
                     // physicsObject = PhysicsUtils.attachTerrainRigidBody(physicsEntity,heightmap,true);

src/main/java/electrosphere/entity/types/terrain/TerrainChunkData.java

@@ -5,10 +5,12 @@ import java.nio.IntBuffer;
 
 import org.lwjgl.BufferUtils;
 
+import electrosphere.entity.state.collidable.TriGeomData;
+
 /**
  * The data required to generate a texture 
  */
-public class TerrainChunkData {
+public class TerrainChunkData implements TriGeomData {
 
     //the verts
     float[] vertices;
@@ -81,10 +83,7 @@ public class TerrainChunkData {
         ratioBuffer.put(this.textureRatioVectors);
     }
 
-    /**
-     * Gets the vertex data
-     * @return the vertex data
-     */
+    @Override
     public float[] getVertices(){
         return vertices;
     }
@@ -97,10 +96,7 @@ public class TerrainChunkData {
         return normals;
     }
 
-    /**
-     * Gets the face element data
-     * @return the face element data
-     */
+    @Override
     public int[] getFaceElements(){
         return faceElements;
     }

src/main/java/electrosphere/renderer/meshgen/BlockMeshgen.java

@@ -13,6 +13,7 @@ import org.lwjgl.opengl.GL40;
 
 import electrosphere.client.block.BlockChunkData;
 import electrosphere.engine.Globals;
+import electrosphere.entity.state.collidable.TriGeomData;
 import electrosphere.renderer.model.Mesh;
 import electrosphere.renderer.model.Model;
 
@@ -120,8 +121,8 @@ public class BlockMeshgen {
         indices.add(2);
         indices.add(3);
         indices.add(0);
-        indices.add(1);
         indices.add(3);
+        indices.add(1);
         //normals
         normals.add(new Vector3f(0,0,-1));
         normals.add(new Vector3f(0,0,-1));
@@ -144,8 +145,8 @@ public class BlockMeshgen {
         verts.add(new Vector3f(quad.x,  quad.y + quad.h,   quad.z + depth).mul(BlockChunkData.BLOCK_SIZE_MULTIPLIER));
         //indices
         indices.add(4);
-        indices.add(6);
         indices.add(7);
+        indices.add(6);
         indices.add(4);
         indices.add(5);
         indices.add(7);
@@ -173,8 +174,8 @@ public class BlockMeshgen {
         indices.add( 8);
         indices.add(10);
         indices.add(11);
-        indices.add( 8);
         indices.add( 9);
+        indices.add( 8);
         indices.add(11);
         //normals
         normals.add(new Vector3f(0,-1,0));
@@ -198,8 +199,8 @@ public class BlockMeshgen {
         verts.add(new Vector3f(quad.x + quad.w,   quad.y + quad.h,   quad.z + depth).mul(BlockChunkData.BLOCK_SIZE_MULTIPLIER));
         //indices
         indices.add(12);
-        indices.add(14);
         indices.add(15);
+        indices.add(14);
         indices.add(12);
         indices.add(13);
         indices.add(15);
@@ -229,8 +230,8 @@ public class BlockMeshgen {
         indices.add(18);
         indices.add(19);
         indices.add(16);
-        indices.add(17);
         indices.add(19);
+        indices.add(17);
         //normals
         normals.add(new Vector3f(1,0,0));
         normals.add(new Vector3f(1,0,0));
@@ -254,8 +255,8 @@ public class BlockMeshgen {
         verts.add(new Vector3f(quad.x + quad.w,  quad.y + quad.h,   quad.z + depth).mul(BlockChunkData.BLOCK_SIZE_MULTIPLIER));
         //indices
         indices.add(20);
-        indices.add(22);
         indices.add(23);
+        indices.add(22);
         indices.add(20);
         indices.add(21);
         indices.add(23);
@@ -466,7 +467,7 @@ public class BlockMeshgen {
     /**
      * The final rasterization data that is emitted
      */
-    public static class BlockMeshData {
+    public static class BlockMeshData implements TriGeomData {
         //the verts
         float[] vertices;
         //normals
@@ -480,6 +481,15 @@ public class BlockMeshgen {
         FloatBuffer normalBuffer;
         IntBuffer faceBuffer;
         FloatBuffer uvBuffer;
+
+        @Override
+        public float[] getVertices() {
+            return vertices;
+        }
+        @Override
+        public int[] getFaceElements() {
+            return faceElements;
+        }
     }
     
     /**

src/main/java/electrosphere/server/block/manager/ServerBlockManager.java

@@ -121,6 +121,16 @@ public class ServerBlockManager {
                 returnedChunk.setWorldY(worldY);
                 returnedChunk.setWorldZ(worldZ);
                 returnedChunk.setHomogenousValue(0);
+                if(worldX == 0 && worldY == 0 && worldZ == 0){
+                    returnedChunk.setHomogenousValue(BlockChunkData.NOT_HOMOGENOUS);
+                    for(int x = 3; x < 16; x++){
+                        for(int y = 8; y < 16; y++){
+                            for(int z = 3; z < 16; z++){
+                                returnedChunk.setType(x, y, z, 1);
+                            }
+                        }
+                    }
+                }
             }
             this.chunkCache.add(worldX, worldY, worldZ, BlockChunkData.LOD_FULL_RES, returnedChunk);
         }

src/main/java/electrosphere/server/datacell/physics/PhysicsDataCell.java

@@ -5,7 +5,10 @@ import electrosphere.engine.Globals;
 import electrosphere.entity.Entity;
 import electrosphere.entity.EntityDataStrings;
 import electrosphere.entity.ServerEntityUtils;
+import electrosphere.entity.types.terrain.BlockChunkEntity;
 import electrosphere.entity.types.terrain.TerrainChunk;
+import electrosphere.renderer.meshgen.BlockMeshgen;
+import electrosphere.renderer.meshgen.BlockMeshgen.BlockMeshData;
 import electrosphere.server.datacell.Realm;
 import electrosphere.server.terrain.manager.ServerTerrainChunk;
 import electrosphere.server.terrain.manager.ServerTerrainManager;
@@ -22,6 +25,7 @@ public class PhysicsDataCell {
     Vector3i worldPos;
     
     Entity physicsEntity;
+    Entity blockPhysicsEntity;
     
     DBody physicsObject;
 
@@ -59,6 +63,8 @@ public class PhysicsDataCell {
     public void retireCell(){
         ServerEntityUtils.destroyEntity(physicsEntity);
         this.physicsEntity = null;
+        ServerEntityUtils.destroyEntity(blockPhysicsEntity);
+        this.blockPhysicsEntity = null;
     }
     
     /**
@@ -81,6 +87,16 @@ public class PhysicsDataCell {
             physicsEntity = TerrainChunk.serverCreateTerrainChunkEntity(realm, realPos, weights, types);
             physicsEntity.putData(EntityDataStrings.TERRAIN_IS_TERRAIN, true);
         }
+        if(blockPhysicsEntity == null){
+            Vector3d realPos = new Vector3d(
+                worldPos.x * ServerTerrainChunk.CHUNK_PLACEMENT_OFFSET,
+                worldPos.y * ServerTerrainChunk.CHUNK_PLACEMENT_OFFSET,
+                worldPos.z * ServerTerrainChunk.CHUNK_PLACEMENT_OFFSET
+            );
+            BlockMeshData meshData = BlockMeshgen.rasterize(realm.getServerWorldData().getServerBlockManager().getChunk(worldPos.x, worldPos.y, worldPos.z));
+            blockPhysicsEntity = BlockChunkEntity.serverCreateBlockChunkEntity(realm, realPos, meshData);
+            blockPhysicsEntity.putData(EntityDataStrings.TERRAIN_IS_TERRAIN, true);
+        }
         // //then actually perform the attach
         // physicsObject = PhysicsUtils.attachTerrainRigidBody(physicsEntity,heightmap,true);
         // Realm realm = Globals.realmManager.getEntityRealm(physicsEntity);
@@ -93,6 +109,7 @@ public class PhysicsDataCell {
     public void destroyPhysics(){
         Realm realm = Globals.realmManager.getEntityRealm(physicsEntity);
         realm.getCollisionEngine().destroyPhysics(physicsEntity);
+        realm.getCollisionEngine().destroyPhysics(blockPhysicsEntity);
     }
 
     /**