Camera shake and fog effect api (#3931)

api/src/main/java/org/geysermc/geyser/api/bedrock/camera/CameraShake.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.api.bedrock.camera;
+
+public enum CameraShake {
+    POSITIONAL,
+    ROTATIONAL;
+}

api/src/main/java/org/geysermc/geyser/api/connection/GeyserConnection.java

@@ -29,10 +29,12 @@ import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.api.connection.Connection;
+import org.geysermc.geyser.api.bedrock.camera.CameraShake;
 import org.geysermc.geyser.api.command.CommandSource;
 import org.geysermc.geyser.api.entity.type.GeyserEntity;
 import org.geysermc.geyser.api.entity.type.player.GeyserPlayerEntity;
 
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 
 /**
@@ -47,9 +49,50 @@ public interface GeyserConnection extends Connection, CommandSource {
     CompletableFuture<@Nullable GeyserEntity> entityByJavaId(@NonNegative int javaId);
 
     /**
+     * Displays a player entity as emoting to this client.
      *
      * @param emoter the player entity emoting.
-     * @param emoteId the emote ID to send to the client.
+     * @param emoteId the emote ID to send to this client.
      */
     void showEmote(@NonNull GeyserPlayerEntity emoter, @NonNull String emoteId);
+
+    /**
+     * Shakes the client's camera.<br><br>
+     * If the camera is already shaking with the same {@link CameraShake} type, then the additional intensity
+     * will be layered on top of the existing intensity, with their own distinct durations.<br>
+     * If the existing shake type is different and the new intensity/duration are not positive, the existing shake only
+     * switches to the new type. Otherwise, the existing shake is completely overridden.
+     *
+     * @param intensity the intensity of the shake. The client has a maximum total intensity of 4.
+     * @param duration the time in seconds that the shake will occur for
+     * @param type the type of shake
+     */
+    void shakeCamera(float intensity, float duration, @NonNull CameraShake type);
+
+    /**
+     * Stops all camera shake of any type.
+     */
+    void stopCameraShake();
+
+    /**
+     * Adds the given fog IDs to the fog cache, then sends all fog IDs in the cache to the client.
+     * <p>
+     * Fog IDs can be found <a href="https://wiki.bedrock.dev/documentation/fog-ids.html">here</a>
+     *
+     * @param fogNameSpaces the fog IDs to add. If empty, the existing cached IDs will still be sent.
+     */
+    void sendFog(String... fogNameSpaces);
+
+    /**
+     * Removes the given fog IDs from the fog cache, then sends all fog IDs in the cache to the client.
+     *
+     * @param fogNameSpaces the fog IDs to remove. If empty, all fog IDs will be removed.
+     */
+    void removeFog(String... fogNameSpaces);
+
+    /**
+     * Returns an immutable copy of all fog affects currently applied to this client.
+     */
+    @NonNull
+    Set<String> fogEffects();
 }

build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 
 allprojects {
     group = "org.geysermc.geyser"
-    version = "2.1.1-SNAPSHOT"
+    version = "2.1.2-SNAPSHOT"
     description = "Allows for players from Minecraft: Bedrock Edition to join Minecraft: Java Edition servers."
 
     tasks.withType<JavaCompile> {

core/src/main/java/org/geysermc/geyser/level/BedrockDimension.java

@@ -35,7 +35,7 @@ package org.geysermc.geyser.level;
  * @param doUpperHeightWarn whether to warn in the console if the Java dimension height exceeds Bedrock's.
  */
 public record BedrockDimension(int minY, int height, boolean doUpperHeightWarn) {
-    public static BedrockDimension OVERWORLD = new BedrockDimension(-64, 384, true);
+    public static final BedrockDimension OVERWORLD = new BedrockDimension(-64, 384, true);
-    public static BedrockDimension THE_NETHER = new BedrockDimension(0, 128, false);
+    public static final BedrockDimension THE_NETHER = new BedrockDimension(0, 128, false);
-    public static BedrockDimension THE_END = new BedrockDimension(0, 256, true);
+    public static final BedrockDimension THE_END = new BedrockDimension(0, 256, true);
 }

core/src/main/java/org/geysermc/geyser/session/GeyserSession.java

@@ -98,6 +98,7 @@ import org.cloudburstmc.protocol.common.util.OptionalBoolean;
 import org.geysermc.api.util.BedrockPlatform;
 import org.geysermc.api.util.InputMode;
 import org.geysermc.api.util.UiProfile;
+import org.geysermc.geyser.api.bedrock.camera.CameraShake;
 import org.geysermc.geyser.api.util.PlatformType;
 import org.geysermc.cumulus.form.Form;
 import org.geysermc.cumulus.form.util.FormBuilder;
@@ -533,7 +534,10 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
     @Setter
     private boolean waitingForStatistics = false;
 
-    private final Set<String> fogNameSpaces = new HashSet<>();
+    /**
+     * All fog effects that are currently applied to the client.
+     */
+    private final Set<String> appliedFog = new HashSet<>();
 
     private final Set<UUID> emotes;
 
@@ -1828,38 +1832,6 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
         }
     }
 
-    /**
-     * Send the following fog IDs, as well as the cached ones, to the client.
-     *
-     * Fog IDs can be found here:
-     * https://wiki.bedrock.dev/documentation/fog-ids.html
-     *
-     * @param fogNameSpaces the fog ids to add
-     */
-    public void sendFog(String... fogNameSpaces) {
-        this.fogNameSpaces.addAll(Arrays.asList(fogNameSpaces));
-
-        PlayerFogPacket packet = new PlayerFogPacket();
-        packet.getFogStack().addAll(this.fogNameSpaces);
-        sendUpstreamPacket(packet);
-    }
-
-    /**
-     * Removes the following fog IDs from the client and the cache.
-     *
-     * @param fogNameSpaces the fog ids to remove
-     */
-    public void removeFog(String... fogNameSpaces) {
-        if (fogNameSpaces.length == 0) {
-            this.fogNameSpaces.clear();
-        } else {
-            this.fogNameSpaces.removeAll(Arrays.asList(fogNameSpaces));
-        }
-        PlayerFogPacket packet = new PlayerFogPacket();
-        packet.getFogStack().addAll(this.fogNameSpaces);
-        sendUpstreamPacket(packet);
-    }
-
     public boolean canUseCommandBlocks() {
         return instabuild && opPermissionLevel >= 2;
     }
@@ -1971,6 +1943,54 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
         sendUpstreamPacket(packet);
     }
 
+    @Override
+    public void shakeCamera(float intensity, float duration, @NonNull CameraShake type) {
+        CameraShakePacket packet = new CameraShakePacket();
+        packet.setIntensity(intensity);
+        packet.setDuration(duration);
+        packet.setShakeType(type == CameraShake.POSITIONAL ? CameraShakeType.POSITIONAL : CameraShakeType.ROTATIONAL);
+        packet.setShakeAction(CameraShakeAction.ADD);
+        sendUpstreamPacket(packet);
+    }
+
+    @Override
+    public void stopCameraShake() {
+        CameraShakePacket packet = new CameraShakePacket();
+        // CameraShakeAction.STOP removes all types regardless of the given type, but regardless it can't be null
+        packet.setShakeType(CameraShakeType.POSITIONAL);
+        packet.setShakeAction(CameraShakeAction.STOP);
+        sendUpstreamPacket(packet);
+    }
+
+    @Override
+    public void sendFog(String... fogNameSpaces) {
+        Collections.addAll(this.appliedFog, fogNameSpaces);
+
+        PlayerFogPacket packet = new PlayerFogPacket();
+        packet.getFogStack().addAll(this.appliedFog);
+        sendUpstreamPacket(packet);
+    }
+
+    @Override
+    public void removeFog(String... fogNameSpaces) {
+        if (fogNameSpaces.length == 0) {
+            this.appliedFog.clear();
+        } else {
+            for (String id : fogNameSpaces) {
+                this.appliedFog.remove(id);
+            }
+        }
+        PlayerFogPacket packet = new PlayerFogPacket();
+        packet.getFogStack().addAll(this.appliedFog);
+        sendUpstreamPacket(packet);
+    }
+
+    @Override
+    public @NonNull Set<String> fogEffects() {
+        // Use a copy so that sendFog/removeFog can be called while iterating the returned set (avoid CME)
+        return Set.copyOf(this.appliedFog);
+    }
+
     public void addCommandEnum(String name, String enums) {
         softEnumPacket(name, SoftEnumUpdateType.ADD, enums);
     }

core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaLoginTranslator.java

@@ -148,7 +148,7 @@ public class JavaLoginTranslator extends PacketTranslator<ClientboundLoginPacket
             DimensionUtils.switchDimension(session, newDimension);
         } else if (DimensionUtils.isCustomBedrockNetherId() && newDimension.equalsIgnoreCase(DimensionUtils.NETHER)) {
             // If the player is spawning into the "fake" nether, send them some fog
-            session.sendFog("minecraft:fog_hell");
+            session.sendFog(DimensionUtils.BEDROCK_FOG_HELL);
         }
 
         ChunkUtils.loadDimension(session);

core/src/main/java/org/geysermc/geyser/util/DimensionUtils.java

@@ -45,6 +45,8 @@ public class DimensionUtils {
     // Changes if the above-bedrock Nether building workaround is applied
     private static int BEDROCK_NETHER_ID = 1;
 
+    public static final String BEDROCK_FOG_HELL = "minecraft:fog_hell";
+
     /**
      * String reference to vanilla Java overworld dimension identifier
      */
@@ -59,8 +61,8 @@ public class DimensionUtils {
     public static final String THE_END = "minecraft:the_end";
 
     public static void switchDimension(GeyserSession session, String javaDimension) {
-        int bedrockDimension = javaToBedrock(javaDimension);
+        int bedrockDimension = javaToBedrock(javaDimension); // new bedrock dimension
-        int previousDimension = javaToBedrock(session.getDimension());
+        String previousDimension = session.getDimension(); // previous java dimension
 
         Entity player = session.getPlayerEntity();
 
@@ -139,11 +141,11 @@ public class DimensionUtils {
         // If the bedrock nether height workaround is enabled, meaning the client is told it's in the end dimension,
         // we check if the player is entering the nether and apply the nether fog to fake the fact that the client
         // thinks they are in the end dimension.
-        if (BEDROCK_NETHER_ID == 2) {
+        if (isCustomBedrockNetherId()) {
             if (NETHER.equals(javaDimension)) {
-                session.sendFog("minecraft:fog_hell");
+                session.sendFog(BEDROCK_FOG_HELL);
-            } else if (previousDimension == BEDROCK_NETHER_ID) {
+            } else if (NETHER.equals(previousDimension)) {
-                session.removeFog("minecraft:fog_hell");
+                session.removeFog(BEDROCK_FOG_HELL);
             }
         }
     }
@@ -200,7 +202,7 @@ public class DimensionUtils {
      * @return the fake dimension to transfer to
      */
     public static String getTemporaryDimension(String currentDimension, String newDimension) {
-        if (BEDROCK_NETHER_ID == 2) {
+        if (isCustomBedrockNetherId()) {
             // Prevents rare instances of Bedrock locking up
             return javaToBedrock(newDimension) == 2 ? OVERWORLD : NETHER;
         }

gradle.properties

@@ -1,12 +1,6 @@
 # Gradle settings
 org.gradle.jvmargs=-Xmx4G
 org.gradle.configureondemand=true
-org.gradle.caching=true
-org.gradle.parallel=true
-
-group=org.geysermc
-version=2.1.1-SNAPSHOT
-
 org.gradle.caching=true
 org.gradle.parallel=true
 org.gradle.vfs.watch=false