Feature: Rotation lock module

src/main/java/com/lambda/mixin/entity/EntityMixin.java

@@ -22,9 +22,12 @@
 import com.lambda.event.events.EntityEvent;
 import com.lambda.event.events.PlayerEvent;
 import com.lambda.interaction.request.rotating.RotationManager;
+import com.lambda.interaction.request.rotating.RotationMode;
+import com.lambda.module.modules.player.RotationLock;
 import com.lambda.module.modules.render.NoRender;
 import com.lambda.util.math.Vec2d;
 import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+import com.llamalad7.mixinextras.injector.v2.WrapWithCondition;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.MovementType;
 import net.minecraft.entity.data.TrackedData;
@@ -142,4 +145,20 @@ private boolean modifyGetFlagInvisible(boolean original) {
     private boolean modifyGetFlagGlowing(boolean original) {
         return (NoRender.INSTANCE.isDisabled() || !NoRender.getNoGlow()) && original;
     }
+
+    @WrapWithCondition(method = "changeLookDirection", at = @At(value = "INVOKE", target = "Lnet/minecraft/entity/Entity;setYaw(F)V"))
+    private boolean wrapSetYaw(Entity instance, float yaw) {
+        return (instance != Lambda.getMc().player ||
+                RotationLock.INSTANCE.isDisabled() ||
+                RotationLock.getRotationSettings().getRotationMode() != RotationMode.Lock ||
+                RotationLock.getYawMode() == RotationLock.RotationMode.None);
+    }
+
+    @WrapWithCondition(method = "changeLookDirection", at = @At(value = "INVOKE", target = "Lnet/minecraft/entity/Entity;setPitch(F)V"))
+    private boolean wrapSetPitch(Entity instance, float yaw) {
+        return (instance != Lambda.getMc().player ||
+                RotationLock.INSTANCE.isDisabled() ||
+                RotationLock.getRotationSettings().getRotationMode() != RotationMode.Lock ||
+                RotationLock.getPitchMode() == RotationLock.RotationMode.None);
+    }
 }

src/main/kotlin/com/lambda/module/modules/player/RotationLock.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2025 Lambda
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lambda.module.modules.player
+
+import com.lambda.config.groups.RotationSettings
+import com.lambda.event.events.TickEvent
+import com.lambda.event.listener.SafeListener.Companion.listen
+import com.lambda.interaction.request.rotating.Rotation
+import com.lambda.interaction.request.rotating.RotationRequest
+import com.lambda.interaction.request.rotating.visibilty.lookAt
+import com.lambda.module.Module
+import com.lambda.module.tag.ModuleTag
+import com.lambda.util.NamedEnum
+import kotlin.math.roundToInt
+
+object RotationLock : Module(
+    name = "RotationLock",
+    description = "Locks the player rotation to the given configuration",
+    tag = ModuleTag.PLAYER,
+) {
+    private enum class Group(override val displayName: String) : NamedEnum {
+        General("General"),
+        Rotation("Rotation")
+    }
+
+    @JvmStatic val yawMode by setting("Yaw Mode", RotationMode.Snap).group(Group.General)
+    private val yawStep by setting("Yaw Step", 45.0, 1.0..180.0, 1.0) { yawMode == RotationMode.Snap }.group(Group.General)
+    private val customYaw by setting("Custom Yaw", 0.0, -179.0..180.0, 1.0) { yawMode == RotationMode.Custom }.group(Group.General)
+    @JvmStatic val pitchMode by setting("Pitch Mode", RotationMode.Custom).group(Group.General)
+    private val pitchStep by setting("Pitch Step", 45.0, 1.0..90.0, 1.0) { pitchMode == RotationMode.Snap }.group(Group.General)
+    private val customPitch by setting("Custom Pitch", 0.0, -90.0..90.0, 1.0) { pitchMode == RotationMode.Custom }.group(Group.General)
+
+    @JvmStatic val rotationSettings = RotationSettings(this, Group.Rotation)
+    private var rotationRequest: RotationRequest? = null
+
+    init {
+        listen<TickEvent.Pre> {
+            val yaw = when (yawMode) {
+                RotationMode.Custom -> customYaw
+                RotationMode.Snap -> {
+                    val normalizedYaw = (player.yaw % 360.0 + 360.0) % 360.0
+                    (normalizedYaw / yawStep).roundToInt() * yawStep
+                }
+                RotationMode.None -> player.yaw.toDouble()
+            }
+            val pitch = when (pitchMode) {
+                RotationMode.Custom -> customPitch
+                RotationMode.Snap -> {
+                    val clampedPitch = player.pitch.coerceIn(-90f, 90f)
+                    (clampedPitch / pitchStep).roundToInt() * pitchStep
+                }
+                RotationMode.None -> player.pitch.toDouble()
+            }
+
+            RotationRequest(lookAt(Rotation(yaw, pitch), 0.001), rotationSettings).submit()
+        }
+    }
+
+    enum class RotationMode {
+        Snap,
+        Custom,
+        None
+    }
+}