Added held block, and cleaned up object rendering.

client/src/main/java/nl/andrewl/aos2_client/Camera.java

@@ -48,10 +48,14 @@ public class Camera {
 	}
 
 	public void setToPlayer(Player p) {
-		position.set(p.getPosition());
+		position.set(p.getEyePosition());
 		velocity.set(p.getVelocity());
 	}
 
+	public void setOrientationToPlayer(Player p) {
+		orientation.set(p.getOrientation());
+	}
+
 	public Matrix4f getViewTransform() {
 		return viewTransform;
 	}

client/src/main/java/nl/andrewl/aos2_client/Client.java

@@ -29,7 +29,7 @@ public class Client implements Runnable {
 	private final ClientConfig config;
 	private final CommunicationHandler communicationHandler;
 	private final InputHandler inputHandler;
-	private final GameRenderer gameRenderer;
+	private GameRenderer gameRenderer;
 
 	private final ClientWorld world;
 	private ClientPlayer player;
@@ -39,7 +39,6 @@ public class Client implements Runnable {
 		this.communicationHandler = new CommunicationHandler(this);
 		this.inputHandler = new InputHandler(this, communicationHandler);
 		this.world = new ClientWorld();
-		this.gameRenderer = new GameRenderer(config.display, world);
 	}
 
 	public ClientConfig getConfig() {
@@ -68,6 +67,7 @@ public class Client implements Runnable {
 			return;
 		}
 
+		gameRenderer = new GameRenderer(config.display, player, world);
 		gameRenderer.setupWindow(
 				new PlayerViewCursorCallback(config.input, this, gameRenderer.getCamera(), communicationHandler),
 				new PlayerInputKeyCallback(inputHandler),
@@ -103,22 +103,19 @@ public class Client implements Runnable {
 			if (playerUpdate.clientId() == player.getId()) {
 				player.getPosition().set(playerUpdate.px(), playerUpdate.py(), playerUpdate.pz());
 				player.getVelocity().set(playerUpdate.vx(), playerUpdate.vy(), playerUpdate.vz());
+				player.setCrouching(playerUpdate.crouching());
+				if (gameRenderer != null) {
 					gameRenderer.getCamera().setToPlayer(player);
-				// TODO: Add getEyeHeight() and isCrouching() to main Player class.
+				}
-				float eyeHeight = playerUpdate.crouching() ? 1.3f : 1.7f;
-				gameRenderer.getCamera().getPosition().y += eyeHeight;
 			} else {
 				world.playerUpdated(playerUpdate);
 			}
 		} else if (msg instanceof ClientInventoryMessage inventoryMessage) {
 			player.setInventory(inventoryMessage.inv());
-			System.out.println("Got inventory!");
 		} else if (msg instanceof InventorySelectedStackMessage selectedStackMessage) {
 			player.getInventory().setSelectedIndex(selectedStackMessage.index());
-			System.out.println("Selected item stack: " + player.getInventory().getSelectedItemStack().getType().getName());
 		} else if (msg instanceof ItemStackMessage itemStackMessage) {
 			player.getInventory().getItemStacks().set(itemStackMessage.index(), itemStackMessage.stack());
-			System.out.println("Item stack updated: " + itemStackMessage.index());
 		} else if (msg instanceof PlayerJoinMessage joinMessage) {
 			world.playerJoined(joinMessage);
 		} else if (msg instanceof PlayerLeaveMessage leaveMessage) {

client/src/main/java/nl/andrewl/aos2_client/ClientWorld.java

@@ -1,15 +1,16 @@
 package nl.andrewl.aos2_client;
 
+import nl.andrewl.aos2_client.model.OtherPlayer;
 import nl.andrewl.aos2_client.render.chunk.ChunkMesh;
 import nl.andrewl.aos2_client.render.chunk.ChunkMeshGenerator;
-import nl.andrewl.aos_core.model.world.Chunk;
 import nl.andrewl.aos_core.model.Player;
+import nl.andrewl.aos_core.model.world.Chunk;
 import nl.andrewl.aos_core.model.world.World;
-import nl.andrewl.aos_core.net.world.ChunkDataMessage;
 import nl.andrewl.aos_core.net.client.PlayerJoinMessage;
 import nl.andrewl.aos_core.net.client.PlayerLeaveMessage;
-import nl.andrewl.aos_core.net.world.ChunkUpdateMessage;
 import nl.andrewl.aos_core.net.client.PlayerUpdateMessage;
+import nl.andrewl.aos_core.net.world.ChunkDataMessage;
+import nl.andrewl.aos_core.net.world.ChunkUpdateMessage;
 import org.joml.Vector3f;
 import org.joml.Vector3i;
 
@@ -28,11 +29,16 @@ public class ClientWorld extends World {
 	private final ChunkMeshGenerator chunkMeshGenerator = new ChunkMeshGenerator();
 	private final Map<Chunk, ChunkMesh> chunkMeshes = new ConcurrentHashMap<>();
 
-	private final Map<Integer, Player> players = new HashMap<>();
+	private final Map<Integer, OtherPlayer> players = new HashMap<>();
 
 	public void playerJoined(PlayerJoinMessage joinMessage) {
 		Player p = joinMessage.toPlayer();
-		players.put(p.getId(), p);
+		OtherPlayer op = new OtherPlayer(p.getId(), p.getUsername());
+		op.getPosition().set(p.getPosition());
+		op.getVelocity().set(p.getVelocity());
+		op.getOrientation().set(p.getOrientation());
+		op.setHeldItemId(joinMessage.selectedItemId());
+		players.put(op.getId(), op);
 	}
 
 	public void playerLeft(PlayerLeaveMessage leaveMessage) {
@@ -40,13 +46,15 @@ public class ClientWorld extends World {
 	}
 
 	public void playerUpdated(PlayerUpdateMessage playerUpdate) {
-		Player p = players.get(playerUpdate.clientId());
+		OtherPlayer p = players.get(playerUpdate.clientId());
 		if (p != null) {
 			playerUpdate.apply(p);
+			p.setHeldItemId(playerUpdate.selectedItemId());
+			p.updateModelTransform();
 		}
 	}
 
-	public Collection<Player> getPlayers() {
+	public Collection<OtherPlayer> getPlayers() {
 		return players.values();
 	}
 
@@ -55,6 +63,7 @@ public class ClientWorld extends World {
 		for (var player : getPlayers()) {
 			movement.set(player.getVelocity()).mul(dt);
 			player.getPosition().add(movement);
+			player.updateModelTransform();
 		}
 	}
 

client/src/main/java/nl/andrewl/aos2_client/control/PlayerViewCursorCallback.java

@@ -52,7 +52,7 @@ public class PlayerViewCursorCallback implements GLFWCursorPosCallbackI {
 				client.getPlayer().getOrientation().x - dx * config.mouseSensitivity,
 				client.getPlayer().getOrientation().y - dy * config.mouseSensitivity
 		);
-		camera.setOrientation(client.getPlayer().getOrientation().x, client.getPlayer().getOrientation().y);
+		camera.setOrientationToPlayer(client.getPlayer());
 		long now = System.currentTimeMillis();
 		if (lastOrientationUpdateSentAt + ORIENTATION_UPDATE_LIMIT < now) {
 			ForkJoinPool.commonPool().submit(() -> comm.sendDatagramPacket(new ClientOrientationState(

client/src/main/java/nl/andrewl/aos2_client/model/ClientPlayer.java

@@ -1,13 +1,18 @@
 package nl.andrewl.aos2_client.model;
 
+import nl.andrewl.aos2_client.Camera;
 import nl.andrewl.aos_core.model.Player;
 import nl.andrewl.aos_core.model.item.Inventory;
+import org.joml.Matrix4f;
 
 import java.util.ArrayList;
 
 public class ClientPlayer extends Player {
 	private final Inventory inventory;
 
+	private final Matrix4f heldItemTransform = new Matrix4f();
+	private final float[] heldItemTransformData = new float[16];
+
 	public ClientPlayer(int id, String username) {
 		super(id, username);
 		this.inventory = new Inventory(new ArrayList<>(), 0);
@@ -22,4 +27,17 @@ public class ClientPlayer extends Player {
 		this.inventory.getItemStacks().addAll(inv.getItemStacks());
 		this.inventory.setSelectedIndex(inv.getSelectedIndex());
 	}
+
+	public void updateHeldItemTransform(Camera cam) {
+		heldItemTransform.identity()
+				.translate(cam.getPosition())
+				.rotate((float) (cam.getOrientation().x + Math.PI), Camera.UP)
+				.rotate(-cam.getOrientation().y + (float) Math.PI / 2, Camera.RIGHT)
+				.translate(-0.35f, -0.4f, 1f);
+		heldItemTransform.get(heldItemTransformData);
+	}
+
+	public float[] getHeldItemTransformData() {
+		return heldItemTransformData;
+	}
 }

client/src/main/java/nl/andrewl/aos2_client/model/OtherPlayer.java

@@ -0,0 +1,77 @@
+package nl.andrewl.aos2_client.model;
+
+import nl.andrewl.aos2_client.Camera;
+import nl.andrewl.aos_core.model.Player;
+import nl.andrewl.aos_core.model.item.ItemTypes;
+import org.joml.Matrix4f;
+import org.joml.Vector3f;
+
+/**
+ * An extension of the player class with only the information needed to display
+ * other players in the game, without needing to hold any sensitive info.
+ */
+public class OtherPlayer extends Player {
+	/**
+	 * The item id of this player's held item.
+	 */
+	private int heldItemId;
+
+	/**
+	 * The value of block that the player has selected. We use this to show
+	 * what color of block the player is holding.
+	 */
+	private byte selectedBlockValue;
+
+	/**
+	 * The transformation used to render this player in the world.
+	 */
+	private final Matrix4f modelTransform = new Matrix4f();
+	private final float[] modelTransformData = new float[16];
+
+	private final Matrix4f heldItemTransform = new Matrix4f();
+	private final float[] heldItemTransformData = new float[16];
+
+	public OtherPlayer(int id, String username) {
+		super(id, username);
+		this.heldItemId = ItemTypes.RIFLE.getId();
+	}
+
+	public int getHeldItemId() {
+		return heldItemId;
+	}
+
+	public void setHeldItemId(int heldItemId) {
+		this.heldItemId = heldItemId;
+	}
+
+	@Override
+	public void setPosition(Vector3f position) {
+		super.setPosition(position);
+		updateModelTransform();
+	}
+
+	@Override
+	public void setOrientation(float x, float y) {
+		super.setOrientation(x, y);
+		updateModelTransform();
+	}
+
+	public void updateModelTransform() {
+		modelTransform.identity()
+				.translate(position)
+				.rotate(orientation.x, Camera.UP);
+		modelTransform.get(modelTransformData);
+		heldItemTransform.set(modelTransform)
+				.translate(0.5f, 1.1f, -0.5f)
+				.rotate((float) Math.PI, Camera.UP);
+		heldItemTransform.get(heldItemTransformData);
+	}
+
+	public float[] getModelTransformData() {
+		return modelTransformData;
+	}
+
+	public float[] getHeldItemTransformData() {
+		return heldItemTransformData;
+	}
+}

client/src/main/java/nl/andrewl/aos2_client/render/GameRenderer.java

@@ -3,13 +3,18 @@ package nl.andrewl.aos2_client.render;
 import nl.andrewl.aos2_client.Camera;
 import nl.andrewl.aos2_client.ClientWorld;
 import nl.andrewl.aos2_client.config.ClientConfig;
+import nl.andrewl.aos2_client.model.ClientPlayer;
 import nl.andrewl.aos2_client.render.chunk.ChunkRenderer;
 import nl.andrewl.aos2_client.render.gui.GUIRenderer;
 import nl.andrewl.aos2_client.render.gui.GUITexture;
 import nl.andrewl.aos2_client.render.model.Model;
+import nl.andrewl.aos_core.model.item.BlockItemStack;
+import nl.andrewl.aos_core.model.item.ItemTypes;
 import org.joml.Matrix4f;
+import org.joml.Vector3f;
 import org.lwjgl.glfw.*;
 import org.lwjgl.opengl.GL;
+import org.lwjgl.opengl.GLUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -34,9 +39,13 @@ public class GameRenderer {
 	private GUIRenderer guiRenderer;
 	private ModelRenderer modelRenderer;
 	private final Camera camera;
+	private final ClientPlayer clientPlayer;
 	private final ClientWorld world;
-	private Model playerModel; // Standard player model used to render all players.
+
+	// Standard models for various game components.
+	private Model playerModel;
 	private Model rifleModel;
+	private Model blockModel;
 
 	private long windowHandle;
 	private int screenWidth = 800;
@@ -44,10 +53,12 @@ public class GameRenderer {
 
 	private final Matrix4f perspectiveTransform;
 
-	public GameRenderer(ClientConfig.DisplayConfig config, ClientWorld world) {
+	public GameRenderer(ClientConfig.DisplayConfig config, ClientPlayer clientPlayer, ClientWorld world) {
 		this.config = config;
+		this.clientPlayer = clientPlayer;
 		this.world = world;
 		this.camera = new Camera();
+		camera.setToPlayer(clientPlayer);
 		this.perspectiveTransform = new Matrix4f();
 	}
 
@@ -118,6 +129,7 @@ public class GameRenderer {
 		try {
 			playerModel = new Model("model/player_simple.obj", "model/simple_player.png");
 			rifleModel = new Model("model/rifle.obj", "model/rifle.png");
+			blockModel = new Model("model/block.obj", "model/block.png");
 		} catch (IOException e) {
 			throw new RuntimeException(e);
 		}
@@ -156,24 +168,41 @@ public class GameRenderer {
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		chunkRenderer.draw(camera, world.getChunkMeshesToDraw());
 
-		// Draw players.
+		// Draw models. Use one texture at a time for efficiency.
-		modelRenderer.setView(camera.getViewTransformData());
+		modelRenderer.start(camera.getViewTransformData());
+		clientPlayer.updateHeldItemTransform(camera);
 		playerModel.bind();
-		Matrix4f modelTransform = new Matrix4f();
 		for (var player : world.getPlayers()) {
-			modelTransform.identity().translate(player.getPosition());
+			// TODO: set aspect color based on player team color
-			modelRenderer.render(playerModel, modelTransform);
+			modelRenderer.setAspectColor(new Vector3f(0.8f, 0.4f, 0));
+			modelRenderer.render(playerModel, player.getModelTransformData());
 		}
 		playerModel.unbind();
 		rifleModel.bind();
+		if (clientPlayer.getInventory().getSelectedItemStack().getType().getId() == ItemTypes.RIFLE.getId()) {
+			modelRenderer.render(rifleModel, clientPlayer.getHeldItemTransformData());
+		}
 		for (var player : world.getPlayers()) {
-			modelTransform.identity()
+			if (player.getHeldItemId() == ItemTypes.RIFLE.getId()) {
-					.translate(player.getPosition())
+				modelRenderer.render(rifleModel, player.getHeldItemTransformData());
-					.rotate((float) (player.getOrientation().x - Math.PI / 2), Camera.UP)
+			}
-					.translate(0, 0, -0.45f);
-			modelRenderer.render(rifleModel, modelTransform);
 		}
 		rifleModel.unbind();
+		blockModel.bind();
+		if (clientPlayer.getInventory().getSelectedItemStack().getType().getId() == ItemTypes.BLOCK.getId()) {
+			BlockItemStack stack = (BlockItemStack) clientPlayer.getInventory().getSelectedItemStack();
+			modelRenderer.setAspectColor(world.getPalette().getColor(stack.getSelectedValue()));
+			modelRenderer.render(blockModel, clientPlayer.getHeldItemTransformData());
+		}
+		modelRenderer.setAspectColor(new Vector3f(0.5f, 0.5f, 0.5f));
+		for (var player : world.getPlayers()) {
+			if (player.getHeldItemId() == ItemTypes.BLOCK.getId()) {
+				modelRenderer.render(blockModel, player.getHeldItemTransformData());
+			}
+		}
+		blockModel.unbind();
+
+		modelRenderer.end();
 
 		guiRenderer.draw();
 

client/src/main/java/nl/andrewl/aos2_client/render/ModelRenderer.java

@@ -1,8 +1,8 @@
 package nl.andrewl.aos2_client.render;
 
-import nl.andrewl.aos2_client.Camera;
 import nl.andrewl.aos2_client.render.model.Model;
 import org.joml.Matrix4f;
+import org.joml.Vector3f;
 
 import static org.lwjgl.opengl.GL46.*;
 
@@ -15,15 +15,18 @@ public class ModelRenderer {
 	private final int viewUniform;
 	private final int modelUniform;
 	private final int textureSamplerUniform;
+	private final int colorUniform;
 
 	public ModelRenderer() {
 		shaderProgram = new ShaderProgram.Builder()
 				.withShader("shader/model/vertex.glsl", GL_VERTEX_SHADER)
 				.withShader("shader/model/fragment.glsl", GL_FRAGMENT_SHADER)
 				.build();
+//		System.out.println(glGetProgramInfoLog(shaderProgram.getId())); // Enable for debugging!
 		projectionUniform = shaderProgram.getUniform("projectionTransform");
 		viewUniform = shaderProgram.getUniform("viewTransform");
 		modelUniform = shaderProgram.getUniform("modelTransform");
+		colorUniform = shaderProgram.getUniform("aspectColor");
 		textureSamplerUniform = shaderProgram.getUniform("textureSampler");
 	}
 
@@ -33,17 +36,27 @@ public class ModelRenderer {
 		shaderProgram.stopUsing();
 	}
 
-	public void setView(float[] data) {
+	public void start(float[] viewTransformData) {
 		shaderProgram.use();
-		glUniformMatrix4fv(viewUniform, false, data);
+		glUniformMatrix4fv(viewUniform, false, viewTransformData);
-		shaderProgram.stopUsing();
+		glUniform1i(textureSamplerUniform, 0);
+	}
+
+	public void setAspectColor(Vector3f color) {
+		glUniform3f(colorUniform, color.x, color.y, color.z);
 	}
 
 	public void render(Model model, Matrix4f modelTransform) {
-		shaderProgram.use();
 		glUniformMatrix4fv(modelUniform, false, modelTransform.get(new float[16]));
-		glUniform1i(textureSamplerUniform, 0);
 		model.draw();
+	}
+
+	public void render(Model model, float[] transformData) {
+		glUniformMatrix4fv(modelUniform, false, transformData);
+		model.draw();
+	}
+
+	public void end() {
 		shaderProgram.stopUsing();
 	}
 

client/src/main/resources/model/block.mtl

@@ -0,0 +1,13 @@
+# Blender MTL File: 'block.blend'
+# Material Count: 1
+
+newmtl Material
+Ns 323.999994
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd block.png

client/src/main/resources/model/block.obj

@@ -0,0 +1,46 @@
+# Blender v2.82 (sub 7) OBJ File: 'block.blend'
+# www.blender.org
+mtllib block.mtl
+o Cube
+v 0.258936 0.258936 -0.258936
+v 0.258936 -0.258936 -0.258936
+v 0.258936 0.258936 0.258936
+v 0.258936 -0.258936 0.258936
+v -0.258936 0.258936 -0.258936
+v -0.258936 -0.258936 -0.258936
+v -0.258936 0.258936 0.258936
+v -0.258936 -0.258936 0.258936
+vt 0.875000 0.500000
+vt 0.625000 0.750000
+vt 0.625000 0.500000
+vt 0.375000 1.000000
+vt 0.375000 0.750000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.375000 0.000000
+vt 0.375000 0.500000
+vt 0.125000 0.750000
+vt 0.125000 0.500000
+vt 0.625000 0.250000
+vt 0.875000 0.750000
+vt 0.625000 1.000000
+vn 0.0000 1.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+usemtl Material
+s off
+f 5/1/1 3/2/1 1/3/1
+f 3/2/2 8/4/2 4/5/2
+f 7/6/3 6/7/3 8/8/3
+f 2/9/4 8/10/4 6/11/4
+f 1/3/5 4/5/5 2/9/5
+f 5/12/6 2/9/6 6/7/6
+f 5/1/1 7/13/1 3/2/1
+f 3/2/2 7/14/2 8/4/2
+f 7/6/3 5/12/3 6/7/3
+f 2/9/4 4/5/4 8/10/4
+f 1/3/5 3/2/5 4/5/5
+f 5/12/6 1/3/6 2/9/6

client/src/main/resources/model/rifle.obj

@@ -2,149 +2,488 @@
 # www.blender.org
 mtllib rifle.mtl
 o Cube
-v 0.169557 1.084944 -0.055830
+v -0.055830 -0.083336 -0.339545
-v 0.169557 0.937055 -0.055830
+v 0.055830 0.064553 -0.339545
-v 0.169557 1.084944 0.055830
+v 0.024118 0.058681 0.281275
-v 0.169557 0.937055 0.055830
+v -0.073945 -0.076680 -0.221085
-v -0.451262 1.079071 -0.024118
+v 0.073945 -0.076680 -0.221085
-v -0.451262 1.030835 -0.024118
+v -0.073945 0.071209 -0.221085
-v -0.451262 1.079071 0.024118
+v 0.073945 0.071209 0.110935
-v -0.451262 1.030835 0.024118
+v 0.073945 -0.076680 0.110935
-v 0.051097 0.943710 -0.073945
+v -0.073945 0.071209 0.110935
-v 0.051097 1.091599 0.073945
+v -0.024118 0.010445 0.916188
-v 0.051097 0.943710 0.073945
+v 0.024118 0.058681 0.916188
-v 0.051097 1.091599 -0.073945
+v 0.024118 0.010445 0.916188
-v -0.280923 0.943710 -0.073945
+v -0.037043 0.013549 -0.510121
-v -0.280923 1.091599 0.073945
+v 0.037043 0.013549 -0.510121
-v -0.280923 0.943710 0.073945
+v 0.037043 -0.122075 -0.483943
-v -0.280923 1.091599 -0.073945
+v -0.073945 0.071209 0.064744
-v -0.835438 1.079071 -0.024118
+v -0.073945 -0.076680 0.064744
-v -0.835438 1.030835 -0.024118
+v 0.073945 0.071209 0.064744
-v -0.835438 1.079071 0.024118
+v 0.026525 0.081393 0.110935
-v -0.835438 1.030835 0.024118
+v -0.026525 0.081393 0.110935
-v 0.340133 1.033939 -0.037043
+v 0.026525 0.081393 0.064744
-v 0.313955 0.898315 -0.037043
+v 0.007063 0.088219 0.093989
-v 0.340133 1.033939 0.037043
+v -0.007063 0.088219 0.093989
-v 0.313955 0.898315 0.037043
+v -0.007063 0.088219 0.081690
-vt 0.558335 0.340476
+v 0.007063 0.088219 0.081690
-vt 0.683269 0.472604
+v 0.007063 0.098418 0.093989
-vt 0.494855 0.472604
+v 0.007063 0.107623 0.093989
-vt 0.045283 0.471847
+v -0.007063 0.107623 0.093989
-vt 0.139168 0.342889
+v 0.016748 0.107464 0.081690
-vt 0.233148 0.480641
+v 0.016748 0.107464 0.093989
-vt 0.825161 0.646216
+v 0.013188 0.113425 0.081690
-vt 0.763706 0.942145
+v 0.013188 0.113425 0.093989
-vt 0.763706 0.646216
+v 0.016899 0.120137 0.081690
-vt 0.723305 0.156537
+v 0.016899 0.120137 0.093989
-vt 0.888641 0.248599
+v 0.013339 0.116811 0.081690
-vt 0.700226 0.248599
+v 0.013339 0.116811 0.093989
-vt 0.197905 0.831321
+v 0.055830 -0.083336 -0.339545
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+f 51/101/29 29/187/29 30/102/29
+f 33/104/30 35/188/30 36/105/30
+f 29/107/31 33/189/31 34/108/31
+f 32/94/14 30/93/14 34/110/14
+f 32/112/32 36/190/32 35/113/32
+f 19/37/33 20/3/33 40/2/33
+f 57/115/12 50/191/12 48/116/12
+f 59/118/7 49/192/7 53/119/7
+f 60/121/14 48/193/14 49/122/14
+f 53/124/20 49/194/20 48/125/20
+f 56/127/24 55/100/24 51/80/24
+f 61/129/34 60/195/34 59/130/34
+f 64/132/35 62/196/35 59/118/35
+f 63/133/36 57/115/36 60/117/36
+f 55/135/12 27/197/12 26/77/12
+f 54/137/24 53/198/24 50/138/24
+f 67/140/24 64/199/24 63/141/24
+f 11/38/14 61/200/14 62/143/14
+f 68/145/37 63/201/37 61/146/37
+f 64/148/38 54/202/38 57/149/38
+f 39/28/3 66/7/3 65/9/3
+f 28/89/14 72/169/14 70/151/14
+f 40/2/20 67/203/20 68/152/20
+f 40/153/7 41/30/7 65/154/7
+f 3/155/12 68/47/12 66/49/12
+f 73/156/24 75/204/24 71/157/24
+f 71/159/39 72/205/39 28/85/39
+f 69/158/24 71/157/24 56/127/24
+f 70/160/40 69/206/40 52/161/40
+f 76/163/41 75/207/41 73/164/41
+f 74/166/42 73/208/42 69/167/42
+f 72/169/14 76/209/14 74/170/14
+f 75/171/43 76/210/43 72/172/43

client/src/main/resources/shader/model/fragment.glsl

@@ -5,10 +5,15 @@ in vec3 vertexNormal;
 
 out vec4 fragmentColor;
 
+uniform vec3 aspectColor;
 uniform sampler2D textureSampler;
 
 void main() {
     vec4 baseColor = texture(textureSampler, textureCoords);
+    vec4 templateColor = vec4(0.0, 1.0, 0.0, 1.0);
+    if (baseColor == templateColor) {
+        baseColor = vec4(aspectColor, 1.0);
+    }
     vec3 lightDirection = normalize(vec3(0.5, -1.0, -0.5));// TODO: Add this via a uniform.
     vec3 lightColor = vec3(1.0, 1.0, 0.9); // TODO: Add this via a uniform.
 

core/src/main/java/nl/andrewl/aos_core/model/Player.java

@@ -11,6 +11,13 @@ import static org.joml.Math.*;
  * know.
  */
 public class Player {
+	public static final float HEIGHT = 1.8f;
+	public static final float HEIGHT_CROUCH = 1.4f;
+	public static final float EYE_HEIGHT = HEIGHT - 0.1f;
+	public static final float EYE_HEIGHT_CROUCH = HEIGHT_CROUCH - 0.1f;
+	public static final float WIDTH = 0.75f;
+	public static final float RADIUS = WIDTH / 2f;
+
 	/**
 	 * The player's position. This is the position of their feet. So if a
 	 * player is standing on a block at y=5 (block occupies space from 4 to 5)
@@ -35,6 +42,12 @@ public class Player {
 	 */
 	protected final Vector2f orientation;
 
+	/**
+	 * Whether this player is crouching or not. This affects the player's
+	 * height, eye-level, speed, and accuracy.
+	 */
+	protected boolean crouching = false;
+
 	/**
 	 * A vector that's internally re-computed each time the player's
 	 * orientation changes, and represents unit vector pointing in the
@@ -87,6 +100,14 @@ public class Player {
 		viewVector.set(sin(orientation.x) * cos(y), -sin(y), cos(orientation.x) * cos(y)).normalize();
 	}
 
+	public boolean isCrouching() {
+		return crouching;
+	}
+
+	public void setCrouching(boolean crouching) {
+		this.crouching = crouching;
+	}
+
 	public String getUsername() {
 		return username;
 	}
@@ -107,4 +128,20 @@ public class Player {
 				cos(x)
 		).normalize();
 	}
+
+	public float getEyeHeight() {
+		return crouching ? EYE_HEIGHT_CROUCH : EYE_HEIGHT;
+	}
+
+	public Vector3f getEyePosition() {
+		return new Vector3f(
+				position.x,
+				position.y + getEyeHeight(),
+				position.z
+		);
+	}
+
+	public float getCurrentHeight() {
+		return crouching ? HEIGHT_CROUCH : HEIGHT;
+	}
 }

core/src/main/java/nl/andrewl/aos_core/net/client/PlayerJoinMessage.java

@@ -1,6 +1,7 @@
 package nl.andrewl.aos_core.net.client;
 
 import nl.andrewl.aos_core.model.Player;
+import nl.andrewl.aos_core.model.item.ItemTypes;
 import nl.andrewl.record_net.Message;
 
 /**
@@ -11,14 +12,18 @@ public record PlayerJoinMessage(
 		int id, String username,
 		float px, float py, float pz,
 		float vx, float vy, float vz,
-		float ox, float oy
+		float ox, float oy,
+		boolean crouching,
+		int selectedItemId
 ) implements Message {
 	public PlayerJoinMessage(Player player) {
 		this(
 				player.getId(), player.getUsername(),
 				player.getPosition().x, player.getPosition().y, player.getPosition().z,
 				player.getVelocity().x, player.getVelocity().y, player.getVelocity().z,
-				player.getOrientation().x, player.getOrientation().y
+				player.getOrientation().x, player.getOrientation().y,
+				player.isCrouching(),
+				ItemTypes.BLOCK.getId()
 		);
 	}
 

core/src/main/java/nl/andrewl/aos_core/net/client/PlayerUpdateMessage.java

@@ -20,5 +20,6 @@ public record PlayerUpdateMessage(
 		p.getPosition().set(px, py, pz);
 		p.getVelocity().set(vx, vy, vz);
 		p.getOrientation().set(ox, oy);
+		p.setCrouching(crouching);
 	}
 }

design/rifle.obj

@@ -2,30 +2,30 @@
 # www.blender.org
 mtllib rifle.mtl
 o Cube
-v 0.169557 1.084944 -0.055830
+v 0.055830 0.064553 0.339545
-v 0.169557 0.937055 -0.055830
+v 0.055830 -0.083336 0.339545
-v 0.169557 1.084944 0.055830
+v -0.055830 0.064553 0.339545
-v 0.169557 0.937055 0.055830
+v -0.055830 -0.083336 0.339545
-v -0.451262 1.079071 -0.024118
+v 0.024118 0.058681 -0.281275
-v -0.451262 1.030835 -0.024118
+v 0.024118 0.010445 -0.281275
-v -0.451262 1.079071 0.024118
+v -0.024118 0.058681 -0.281275
-v -0.451262 1.030835 0.024118
+v -0.024118 0.010445 -0.281275
-v 0.051097 0.943710 -0.073945
+v 0.073945 -0.076680 0.221085
-v 0.051097 1.091599 0.073945
+v -0.073944 0.071209 0.221085
-v 0.051097 0.943710 0.073945
+v -0.073944 -0.076680 0.221085
-v 0.051097 1.091599 -0.073945
+v 0.073945 0.071209 0.221085
-v -0.280923 0.943710 -0.073945
+v 0.073945 -0.076680 -0.110935
-v -0.280923 1.091599 0.073945
+v -0.073945 0.071209 -0.110935
-v -0.280923 0.943710 0.073945
+v -0.073945 -0.076680 -0.110935
-v -0.280923 1.091599 -0.073945
+v 0.073945 0.071209 -0.110935
-v -0.835438 1.079071 -0.024118
+v 0.024118 0.058681 -0.665451
-v -0.835438 1.030835 -0.024118
+v 0.024118 0.010445 -0.665451
-v -0.835438 1.079071 0.024118
+v -0.024118 0.058681 -0.665451
-v -0.835438 1.030835 0.024118
+v -0.024118 0.010445 -0.665451
-v 0.340133 1.033939 -0.037043
+v 0.037043 0.013549 0.510121
-v 0.313955 0.898315 -0.037043
+v 0.037043 -0.122075 0.483943
-v 0.340133 1.033939 0.037043
+v -0.037042 0.013549 0.510121
-v 0.313955 0.898315 0.037043
+v -0.037042 -0.122075 0.483943
 vt 0.558335 0.340476
 vt 0.683269 0.472604
 vt 0.494855 0.472604
@@ -82,26 +82,26 @@ vt 0.115206 0.041261
 vt 0.901367 0.112578
 vt 0.747240 0.040571
 vt 0.636255 0.958716
-vn -0.0734 0.9973 0.0000
+vn -0.0000 0.9973 -0.0733
-vn -0.2807 0.0000 0.9598
+vn -0.9598 0.0000 -0.2807
-vn 0.0000 -1.0000 0.0000
+vn 0.0000 -1.0000 -0.0000
-vn -0.0561 -0.9984 0.0000
+vn 0.0000 -0.9984 -0.0561
-vn 0.1095 0.0000 0.9940
+vn -0.9940 0.0000 0.1095
-vn 0.1512 0.0000 -0.9885
+vn 0.9885 0.0000 0.1512
-vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 -0.0000
-vn 0.1512 0.0000 0.9885
+vn -0.9885 0.0000 0.1512
-vn 0.0561 0.9984 0.0000
+vn 0.0000 0.9984 0.0561
-vn -0.4554 -0.8903 0.0000
+vn 0.0000 -0.8903 -0.4554
-vn -0.2807 0.0000 -0.9598
+vn 0.9598 0.0000 -0.2807
-vn 0.0000 0.0000 1.0000
-vn 0.0000 1.0000 0.0000
 vn -1.0000 0.0000 0.0000
-vn 0.9819 -0.1895 0.0000
+vn 0.0000 1.0000 0.0000
-vn 0.1227 -0.0237 -0.9922
+vn 0.0000 0.0000 -1.0000
-vn -0.2591 -0.9658 0.0000
+vn 0.0000 -0.1895 0.9819
-vn 0.2865 0.9581 0.0000
+vn 0.9922 -0.0237 0.1227
-vn 0.1227 -0.0237 0.9922
+vn 0.0000 -0.9658 -0.2591
-vn 0.1095 0.0000 -0.9940
+vn 0.0000 0.9581 0.2865
+vn -0.9922 -0.0237 0.1227
+vn 0.9940 0.0000 0.1095
 usemtl Material
 s off
 f 5/1/1 14/2/1 16/3/1

server/src/main/java/nl/andrewl/aos2_server/ServerPlayer.java

@@ -19,13 +19,6 @@ import java.util.ArrayList;
 public class ServerPlayer extends Player {
 	private static final Logger log = LoggerFactory.getLogger(ServerPlayer.class);
 
-	public static final float HEIGHT = 1.8f;
-	public static final float HEIGHT_CROUCH = 1.4f;
-	public static final float EYE_HEIGHT = HEIGHT - 0.1f;
-	public static final float EYE_HEIGHT_CROUCH = HEIGHT_CROUCH - 0.1f;
-	public static final float WIDTH = 0.75f;
-	public static final float RADIUS = WIDTH / 2f;
-
 	private final PlayerActionManager actionManager;
 	private final Inventory inventory;
 

server/src/main/java/nl/andrewl/aos2_server/logic/PlayerActionManager.java

@@ -71,6 +71,11 @@ public class PlayerActionManager {
 			tickBlockAction(now, server, world);
 		}
 
+		if (player.isCrouching() != lastInputState.crouching()) {
+			player.setCrouching(lastInputState.crouching());
+			updated = true;
+		}
+
 		tickMovement(dt, world, server.getConfig().physics);
 	}
 
@@ -82,9 +87,7 @@ public class PlayerActionManager {
 				stack.getAmount() < stack.getType().getMaxAmount() &&
 				now - lastBlockRemovedAt > server.getConfig().actions.blockRemoveCooldown * 1000
 		) {
-			Vector3f eyePos = new Vector3f(player.getPosition());
+			var hit = world.getLookingAtPos(player.getEyePosition(), player.getViewVector(), 10);
-			eyePos.y += getEyeHeight();
-			var hit = world.getLookingAtPos(eyePos, player.getViewVector(), 10);
 			if (hit != null) {
 				world.setBlockAt(hit.pos().x, hit.pos().y, hit.pos().z, (byte) 0);
 				lastBlockRemovedAt = now;
@@ -99,9 +102,7 @@ public class PlayerActionManager {
 				stack.getAmount() > 0 &&
 				now - lastBlockPlacedAt > server.getConfig().actions.blockPlaceCooldown * 1000
 		) {
-			Vector3f eyePos = new Vector3f(player.getPosition());
+			var hit = world.getLookingAtPos(player.getEyePosition(), player.getViewVector(), 10);
-			eyePos.y += getEyeHeight();
-			var hit = world.getLookingAtPos(eyePos, player.getViewVector(), 10);
 			if (hit != null) {
 				Vector3i placePos = new Vector3i(hit.pos());
 				placePos.add(hit.norm());
@@ -226,7 +227,7 @@ public class PlayerActionManager {
 		float playerBodyMinX = playerPos.x - RADIUS;
 		float playerBodyMaxX = playerPos.x + RADIUS;
 		float playerBodyMinY = playerPos.y;
-		float playerBodyMaxY = playerPos.y + getCurrentHeight();
+		float playerBodyMaxY = playerPos.y + player.getCurrentHeight();
 
 		// Compute the bounds of all blocks the player is intersecting with.
 		int minX = (int) Math.floor(playerBodyMinX);
@@ -243,7 +244,7 @@ public class PlayerActionManager {
 		var position = player.getPosition();
 		var velocity = player.getVelocity();
 		final Vector3f nextTickPosition = new Vector3f(position).add(movement);
-		float height = getCurrentHeight();
+		float height = player.getCurrentHeight();
 		float delta = 0.00001f;
 		final Vector3f stepSize = new Vector3f(movement).normalize(1.0f);
 		// The number of steps we'll make towards the next tick position.
@@ -373,12 +374,4 @@ public class PlayerActionManager {
 			}
 		}
 	}
-
-	public float getCurrentHeight() {
-		return lastInputState.crouching() ? HEIGHT_CROUCH : HEIGHT;
-	}
-
-	public float getEyeHeight() {
-		return lastInputState.crouching() ? EYE_HEIGHT_CROUCH : EYE_HEIGHT;
-	}
 }