Add minecraft:set_rotation entity modifier

src/main/java/errorcraft/entitymodifiers/entity/modifier/Deserialisers.java

@@ -4,6 +4,7 @@
 import errorcraft.entitymodifiers.util.RelativeNumberProvider;
 import errorcraft.entitymodifiers.world.position.provider.PositionProvider;
 import errorcraft.entitymodifiers.world.position.provider.PositionProviderTypes;
+import errorcraft.entitymodifiers.world.rotation.RotationProvider;
 import net.minecraft.loot.context.LootContext;
 import net.minecraft.loot.provider.number.LootNumberProvider;
 import net.minecraft.loot.provider.number.LootNumberProviderTypes;
@@ -20,6 +21,7 @@ public static GsonBuilder createEntityModifierSerialiser() {
 			.registerTypeHierarchyAdapter(LootScoreProvider.class, LootScoreProviderTypes.createGsonSerializer())
 			.registerTypeHierarchyAdapter(LootContext.EntityTarget.class, new LootContext.EntityTarget.Serializer())
 			.registerTypeHierarchyAdapter(PositionProvider.class, PositionProviderTypes.createGsonAdapter())
+			.registerTypeHierarchyAdapter(RotationProvider.class, new RotationProvider.Serialiser())
 			.registerTypeHierarchyAdapter(RelativeNumberProvider.class, new RelativeNumberProvider.Serialiser());
 	}
 }

src/main/java/errorcraft/entitymodifiers/entity/modifier/EntityModifierTypes.java

@@ -20,6 +20,7 @@ public class EntityModifierTypes {
 	public static final EntityModifierType SET_ABSORPTION = register("set_absorption", new SetAbsorptionEntityModifier.Serialiser());
 	public static final EntityModifierType SET_SATURATION = register("set_saturation", new SetSaturationEntityModifier.Serialiser());
 	public static final EntityModifierType SET_POSITION = register("set_position", new SetPositionEntityModifier.Serialiser());
+	public static final EntityModifierType SET_ROTATION = register("set_rotation", new SetRotationEntityModifier.Serialiser());
 
 	public static Object createGsonAdapter() {
 		return JsonSerializing.createSerializerBuilder(ENTITY_MODIFIER_TYPE, "function", "function", EntityModifier::getType).build();

src/main/java/errorcraft/entitymodifiers/entity/modifier/modifiers/SetRotationEntityModifier.java

@@ -0,0 +1,55 @@
+package errorcraft.entitymodifiers.entity.modifier.modifiers;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSerializationContext;
+import errorcraft.entitymodifiers.entity.modifier.EntityModifier;
+import errorcraft.entitymodifiers.entity.modifier.EntityModifierType;
+import errorcraft.entitymodifiers.entity.modifier.EntityModifierTypes;
+import errorcraft.entitymodifiers.world.rotation.RotationProvider;
+import net.minecraft.entity.Entity;
+import net.minecraft.loot.context.LootContext;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.util.JsonHelper;
+import net.minecraft.util.math.Vec2f;
+
+public class SetRotationEntityModifier implements EntityModifier {
+    private final RotationProvider rotation;
+
+    public SetRotationEntityModifier(RotationProvider rotation) {
+        this.rotation = rotation;
+    }
+
+    @Override
+    public EntityModifierType getType() {
+        return EntityModifierTypes.SET_ROTATION;
+    }
+
+    @Override
+    public Entity apply(Entity entity, LootContext lootContext) {
+        Vec2f newRotation = this.rotation.getRotation(entity.getRotationClient(), lootContext);
+        entity.refreshPositionAndAngles(entity.getX(), entity.getY(), entity.getZ(), newRotation.y, newRotation.x);
+        entity.setHeadYaw(newRotation.y);
+        if (entity instanceof ServerPlayerEntity player) {
+            setPlayerRotation(player, newRotation);
+        }
+        return entity;
+    }
+
+    private static void setPlayerRotation(ServerPlayerEntity player, Vec2f rotation) {
+        player.networkHandler.requestTeleport(player.getX(), player.getY(), player.getZ(), rotation.y, rotation.x);
+    }
+
+    public static class Serialiser implements EntityModifier.Serialiser<SetRotationEntityModifier> {
+        @Override
+        public void toJson(JsonObject json, SetRotationEntityModifier object, JsonSerializationContext context) {
+            json.add("rotation", context.serialize(object.rotation));
+        }
+
+        @Override
+        public SetRotationEntityModifier fromJson(JsonObject json, JsonDeserializationContext context) {
+            RotationProvider rotation = JsonHelper.deserialize(json, "rotation", context, RotationProvider.class);
+            return new SetRotationEntityModifier(rotation);
+        }
+    }
+}

src/main/java/errorcraft/entitymodifiers/world/rotation/RotationProvider.java

@@ -0,0 +1,43 @@
+package errorcraft.entitymodifiers.world.rotation;
+
+import com.google.gson.*;
+import errorcraft.entitymodifiers.util.RelativeNumberProvider;
+import net.minecraft.loot.context.LootContext;
+import net.minecraft.util.JsonHelper;
+import net.minecraft.util.math.Vec2f;
+
+import java.lang.reflect.Type;
+
+public class RotationProvider {
+    private final RelativeNumberProvider x;
+    private final RelativeNumberProvider y;
+
+    public RotationProvider(RelativeNumberProvider x, RelativeNumberProvider y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public Vec2f getRotation(Vec2f currentRotation, LootContext lootContext) {
+        float newX = this.x.getFloat(currentRotation.x, lootContext);
+        float newY = this.y.getFloat(currentRotation.y, lootContext);
+        return new Vec2f(newX, newY);
+    }
+
+    public static class Serialiser implements JsonDeserializer<RotationProvider>, JsonSerializer<RotationProvider> {
+        @Override
+        public RotationProvider deserialize(JsonElement json, Type type, JsonDeserializationContext context) throws JsonParseException {
+            JsonObject jsonObject = JsonHelper.asObject(json, "value");
+            RelativeNumberProvider x = JsonHelper.deserialize(jsonObject, "x", context, RelativeNumberProvider.class);
+            RelativeNumberProvider y = JsonHelper.deserialize(jsonObject, "y", context, RelativeNumberProvider.class);
+            return new RotationProvider(x, y);
+        }
+
+        @Override
+        public JsonElement serialize(RotationProvider object, Type type, JsonSerializationContext context) {
+            JsonObject json = new JsonObject();
+            json.add("x", context.serialize(object.x));
+            json.add("y", context.serialize(object.y));
+            return json;
+        }
+    }
+}