v1.1.0 rifle suppressor with suppressed shot sound

Install.ps1

@@ -117,7 +117,6 @@ try {
     Write-Host 'Start Sons of the Forest, then:'
     Write-Host '  1. Check that MODS appears on the main menu and lists RifleScope'
     Write-Host '  2. Load into a game, equip the rifle and aim down the scope'
-    Write-Host '  3. Press F1 and type scopezoom to see or change the zoom'
     Write-Host ''
 }
 catch {
@@ -129,4 +128,3 @@ catch {
     Write-Host ''
 }
 
-Read-Host 'Press Enter to close' | Out-Null

README.md

@@ -2,7 +2,8 @@
 
 A stronger rifle scope for Sons of the Forest. Aiming down the rifle scope zooms
 5x further than the vanilla scope and shows a full screen scope view with a
-crosshair reticle, mil dots and a rangefinder instead of the red dot.
+crosshair reticle, mil dots and a rangefinder instead of the red dot. You can
+also put the pistol suppressor on the rifle for quiet, suppressed shots.
 
 ## Multiplayer
 
@@ -67,15 +68,31 @@ Press F1 to open the console, then use these commands:
 
 | Command | Action |
 | --- | --- |
+| `scope` | Show whether the scope is on or off |
+| `scope off` | Go back to the vanilla scope. The suppressor is not affected |
+| `scope on` | Turn the scope back on |
 | `scopezoom` | Show the current zoom |
 | `scopezoom 5` | Set the zoom as a multiple of the vanilla scope, 1 to 50. The default is 5 |
 | `scopetrim` | Show the current vertical trim |
-| `scopetrim 50` | Set the vertical trim, -200 to 200. Positive moves hits down, negative moves hits up. The default is 50 |
+| `scopetrim 60` | Set the vertical trim, -200 to 200. Positive moves hits down, negative moves hits up. The default is 60 |
 | `scopewind` | Show the current windage |
 | `scopewind 20` | Set the windage, -200 to 200. Positive moves hits right, negative moves hits left. The default is 0 |
+| `suppressor` | Show whether the rifle suppressor is on or off |
+| `suppressor on` | Put the suppressor on the rifle |
+| `suppressor off` | Take the suppressor off the rifle |
 | `scopedebug` | Toggle a debug readout above the range |
 
-The zoom, trim and windage are saved to `UserData\RifleScope.txt` in your game
+### Suppressor
+
+Run `suppressor on` to put the pistol suppressor on the end of the rifle barrel.
+Rifle shots then use the suppressed pistol shot sound. It stays on until you run
+`suppressor off`, even after restarting the game. You do not need a suppressor in
+your inventory.
+
+Trim and windage are angle adjustments, so a setting that is right at one range
+stays right at every range.
+
+The on or off setting, suppressor, zoom, trim and windage are saved to `UserData\RifleScope.txt` in your game
 folder. Setting the zoom to 1 keeps vanilla zoom and the normal scope view,
 without the red dot.
 

RifleScope.cs

@@ -2,9 +2,15 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
+using System.Reflection;
+using HarmonyLib;
+using Il2CppInterop.Runtime;
+using Il2CppInterop.Runtime.InteropTypes.Arrays;
 using RedLoader;
 using RedLoader.Utils;
 using Sons.FieldOfView;
+using Sons.Items.Core;
 using Sons.Weapon;
 using SonsSdk;
 using SonsSdk.Attributes;
@@ -20,9 +26,16 @@ public class RifleScope : SonsMod
     private const float DefaultZoom = 5f;
     private const float MinZoom = 1f;
     private const float MaxZoom = 50f;
-    private const float DefaultTrimCm = 50f;
+    private const float DefaultTrimCm = 60f;
     private const float MaxTrimCm = 200f;
     private const float MaxWindCm = 200f;
+    private const float TrimReferenceRange = 50f;
+    private const string SuppressorModName = "CompactPistolSuppressorMod";
+    private const string SuppressedFireEvent = "event:/SotF Events/player sounds/Weapons/PistolTactical/PistolTacticalFire";
+    private const string MuzzleName = "RifleScopeMuzzle";
+    private const string RifleFireEvent = "event:/SotF Events/player sounds/Weapons/Rifle/rifle_fire";
+    private const string UpgradeParameter = "upgrade";
+    private const float SuppressedUpgradeValue = 0.2f;
     private const int MilDotCount = 10;
     private const float MilDotSize = 0.4f;
     private const float MinDotPx = 7f;
@@ -42,6 +55,14 @@ public class RifleScope : SonsMod
     private static float _trimCm = DefaultTrimCm;
     private static float _windCm;
     private static bool _debug;
+    private static bool _enabled = true;
+    private static bool _suppressor;
+    private static string _originalFireEvent;
+    private static HarmonyLib.Harmony _audioHarmony;
+    private static bool _loggedParamError;
+    private static bool _loggedPistolParams;
+    private static bool _reissuing;
+    private static readonly List<(Renderer Renderer, int Slot, Material Original)> RedDotSlots = new();
     private static string _configPath;
 
     private static RifleAnimatorController _rifle;
@@ -109,6 +130,9 @@ public class RifleScope : SonsMod
                 return;
         }
 
+        if (!_enabled)
+            return;
+
         var manager = _rifle._cameraFovManager;
         if (!manager)
         {
@@ -131,14 +155,274 @@ public class RifleScope : SonsMod
                 continue;
             _rifle = rifle;
             _projectile = FindProjectileTransform(rifle);
-            if (!_overlay)
+            _originalFireEvent ??= rifle._gunShotAudioEvent;
-                CreateOverlay();
+            if (_enabled)
-            HideRedDot(rifle);
+            {
+                if (!_overlay)
+                    CreateOverlay();
+                HideRedDot(rifle);
+            }
+            if (_suppressor)
+                SetSuppressor(rifle, true);
             return true;
         }
         return false;
     }
 
+    private static WeaponMod FindSuppressorMod()
+    {
+        foreach (var mod in Resources.FindObjectsOfTypeAll<WeaponMod>())
+        {
+            if (mod && mod.name == SuppressorModName)
+                return mod;
+        }
+        return null;
+    }
+
+    private static Transform FindChild(Transform root, string name)
+    {
+        foreach (var t in root.GetComponentsInChildren<Transform>(true))
+        {
+            if (t.name == name)
+                return t;
+        }
+        return null;
+    }
+
+    private static bool EnsureMuzzleSlot(RangedWeaponController rifle, WeaponMods mods)
+    {
+        var links = mods._modLocations;
+        for (var i = 0; i < links.Count; i++)
+        {
+            if (links[i].Slot == WeaponMod.Slot.Muzzle)
+                return true;
+        }
+
+        var anchor = FindChild(rifle.transform, "ProjectileVisualTransform");
+        if (!anchor)
+            return false;
+
+        var muzzle = FindChild(anchor.parent, MuzzleName);
+        if (!muzzle)
+        {
+            var go = new GameObject(MuzzleName);
+            go.layer = anchor.gameObject.layer;
+            muzzle = go.transform;
+            muzzle.SetParent(anchor.parent, false);
+            muzzle.localPosition = anchor.localPosition;
+            muzzle.localRotation = Quaternion.identity;
+            muzzle.localScale = Vector3.one;
+        }
+
+        var link = new WeaponMods.ModLink();
+        link.Slot = WeaponMod.Slot.Muzzle;
+        link.Location = muzzle;
+        links.Add(link);
+        return true;
+    }
+
+    private static Type FindGameType(string name)
+    {
+        foreach (var asm in AppDomain.CurrentDomain.GetAssemblies())
+        {
+            Type[] types;
+            try
+            {
+                types = asm.GetTypes();
+            }
+            catch (ReflectionTypeLoadException e)
+            {
+                types = e.Types.Where(t => t != null).ToArray();
+            }
+            catch
+            {
+                continue;
+            }
+
+            foreach (var t in types)
+            {
+                if (t != null && t.Name == name)
+                    return t;
+            }
+        }
+        return null;
+    }
+
+    private static void InstallAudioPatches()
+    {
+        if (_audioHarmony != null)
+            return;
+        _audioHarmony = new HarmonyLib.Harmony("RifleScope.SuppressorAudio");
+
+        var handler = FindGameType("FMOD_AnimationEventHandler");
+        var animPrefix = new HarmonyMethod(typeof(RifleScope).GetMethod(nameof(AnimEventPrefix), BindingFlags.NonPublic | BindingFlags.Static));
+        var count = 0;
+        if (handler != null)
+        {
+            foreach (var m in handler.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly))
+            {
+                var ps = m.GetParameters();
+                if (m.Name != "playFMODEvent" || ps.Length == 0 || ps[0].ParameterType != typeof(string))
+                    continue;
+                _audioHarmony.Patch(m, prefix: animPrefix);
+                count++;
+            }
+        }
+
+        var common = FindGameType("FMODCommon");
+        var oneshotPrefix = new HarmonyMethod(typeof(RifleScope).GetMethod(nameof(OneshotPrefix), BindingFlags.NonPublic | BindingFlags.Static));
+        if (common != null)
+        {
+            foreach (var m in common.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.DeclaredOnly))
+            {
+                var ps = m.GetParameters();
+                if (m.Name != "PlayOneshotInternal" || ps.Length < 4 || ps[0].ParameterType != typeof(string))
+                    continue;
+                _audioHarmony.Patch(m, prefix: oneshotPrefix);
+                count++;
+            }
+        }
+
+        RLog.Msg($"Suppressor audio: patched {count} methods (handler={(handler != null)}, common={(common != null)})");
+    }
+
+    private static bool RifleSuppressedNow() =>
+        _suppressor && _rifle && _rifle.gameObject.activeInHierarchy;
+
+    private static bool AnimEventPrefix(Component __instance, object[] __args)
+    {
+        try
+        {
+            if (!RifleSuppressedNow() || __args == null || __args.Length == 0 || __args[0] as string != RifleFireEvent)
+                return true;
+            if (!__instance || __instance.transform.root != _rifle.transform.root)
+                return true;
+            return false;
+        }
+        catch
+        {
+            return true;
+        }
+    }
+
+    private static bool OneshotPrefix(MethodBase __originalMethod, object[] __args)
+    {
+        if (_reissuing)
+            return true;
+
+        try
+        {
+            if (__args == null || __args.Length < 4 || __args[0] as string != SuppressedFireEvent)
+                return true;
+
+            var existing = __args[3] as Il2CppReferenceArray<Il2CppSystem.Object>;
+
+            if (!RifleSuppressedNow())
+            {
+                if (!_loggedPistolParams && existing != null && existing.Length > 0)
+                {
+                    _loggedPistolParams = true;
+                    RLog.Msg($"Suppressor audio: pistol params [{string.Join(", ", existing.Select(Describe))}]");
+                }
+                return true;
+            }
+
+            var oldCount = existing?.Length ?? 0;
+            for (var i = 0; i < oldCount; i++)
+            {
+                if (existing[i] != null && existing[i].ToString() == UpgradeParameter)
+                    return true;
+            }
+
+            var array = new Il2CppReferenceArray<Il2CppSystem.Object>(oldCount + 2);
+            for (var i = 0; i < oldCount; i++)
+                array[i] = existing[i];
+            array[oldCount] = new Il2CppSystem.Object(IL2CPP.ManagedStringToIl2Cpp(UpgradeParameter));
+            array[oldCount + 1] = BoxFloat(SuppressedUpgradeValue);
+
+            var args = (object[])__args.Clone();
+            args[3] = array;
+            _reissuing = true;
+            try
+            {
+                __originalMethod.Invoke(null, args);
+            }
+            finally
+            {
+                _reissuing = false;
+            }
+            return false;
+        }
+        catch (Exception e)
+        {
+            if (!_loggedParamError)
+            {
+                _loggedParamError = true;
+                RLog.Error($"Suppressor audio: could not play suppressed shot: {(e.InnerException ?? e).Message}");
+            }
+            return true;
+        }
+    }
+
+    private static Il2CppSystem.Object BoxFloat(float value)
+    {
+        object single = new Il2CppSystem.Single();
+        typeof(Il2CppSystem.Single).GetField("m_value", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)?.SetValue(single, value);
+        return ((Il2CppSystem.Single)single).BoxIl2CppObject();
+    }
+
+    private static string Describe(Il2CppSystem.Object o)
+    {
+        if (o == null)
+            return "null";
+        try
+        {
+            return $"{o.GetIl2CppType().Name}:{o.ToString()}";
+        }
+        catch
+        {
+            return "?";
+        }
+    }
+
+    private static void SetSuppressor(RangedWeaponController rifle, bool on)
+    {
+        var weapon = rifle._rangedWeapon;
+        var mods = weapon ? weapon._weaponMods : null;
+        if (!mods)
+        {
+            Say("Suppressor: rifle has no WeaponMods");
+            return;
+        }
+
+        var mod = FindSuppressorMod();
+        if (!mod)
+        {
+            Say("Suppressor: pistol suppressor mod is not loaded");
+            return;
+        }
+
+        if (on)
+        {
+            InstallAudioPatches();
+            if (!EnsureMuzzleSlot(rifle, mods))
+            {
+                Say("Suppressor: could not find the rifle muzzle");
+                return;
+            }
+
+            var applied = mods.HasMod(mod.ModItemId) || mods.ApplyMod(mod);
+            rifle._gunShotAudioEvent = SuppressedFireEvent;
+            RLog.Msg($"Suppressor on: applied={applied} slot={mod.AttachesToSlot} required={mod.RequiredSlot} item={mod.ModItemId}");
+            return;
+        }
+
+        if (mods.HasMod(mod.ModItemId))
+            mods.RemoveMod(mod);
+        if (_originalFireEvent != null)
+            rifle._gunShotAudioEvent = _originalFireEvent;
+    }
+
     private static Transform FindProjectileTransform(RangedWeaponController rifle)
     {
         var constraint = rifle._projectileTransformConstraint;
@@ -196,8 +480,9 @@ public class RifleScope : SonsMod
         }
 
         CenterPoint(cam, out var point);
-        point -= cam.transform.up * (_trimCm * 0.01f);
+        var scale = Vector3.Distance(cam.transform.position, point) / TrimReferenceRange;
-        point += cam.transform.right * (_windCm * 0.01f);
+        point -= cam.transform.up * (_trimCm * 0.01f * scale);
+        point += cam.transform.right * (_windCm * 0.01f * scale);
         var dir = point - _projectile.position;
         if (dir.sqrMagnitude < 0.0001f)
             return;
@@ -267,6 +552,7 @@ public class RifleScope : SonsMod
                 var mat = mats[i];
                 if (!mat || HiddenIds.Contains(mat.GetInstanceID()) || !mat.shader || mat.shader.name != RedDotShader)
                     continue;
+                RedDotSlots.Add((renderer, i, mat));
                 mats[i] = HiddenFor(mat);
                 changed = true;
             }
@@ -275,6 +561,33 @@ public class RifleScope : SonsMod
         }
     }
 
+    private static void RestoreRedDot()
+    {
+        foreach (var (renderer, slot, original) in RedDotSlots)
+        {
+            if (!renderer || !original)
+                continue;
+            var mats = renderer.sharedMaterials;
+            if (slot >= mats.Length || !mats[slot] || !HiddenIds.Contains(mats[slot].GetInstanceID()))
+                continue;
+            mats[slot] = original;
+            renderer.sharedMaterials = mats;
+        }
+        RedDotSlots.Clear();
+    }
+
+    private static void Disable()
+    {
+        SetZoomed(false, null);
+        if (_rifle)
+        {
+            var settings = _rifle._fovChangeSettings;
+            if (settings != null && OriginalOffsets.TryGetValue(settings.Pointer, out var original))
+                settings._FieldOfViewTargetOffset_k__BackingField = original;
+        }
+        RestoreRedDot();
+    }
+
     private static Material HiddenFor(Material original)
     {
         var id = original.GetInstanceID();
@@ -632,6 +945,44 @@ public class RifleScope : SonsMod
         return tex;
     }
 
+    [DebugCommand("scope")]
+    private static void ScopeCommand(string args)
+    {
+        args = (args ?? string.Empty).Trim().ToLowerInvariant();
+
+        if (args == "on" || args == "off")
+        {
+            _enabled = args == "on";
+            Save();
+            if (_enabled)
+                _rifle = null;
+            else
+                Disable();
+            Say($"RifleScope {(_enabled ? "on" : "off")}");
+            return;
+        }
+
+        Say($"RifleScope is {(_enabled ? "on" : "off")}. Usage: scope on or scope off");
+    }
+
+    [DebugCommand("suppressor")]
+    private static void SuppressorCommand(string args)
+    {
+        args = (args ?? string.Empty).Trim().ToLowerInvariant();
+
+        if (args != "on" && args != "off")
+        {
+            Say($"Rifle suppressor is {(_suppressor ? "on" : "off")}. Usage: suppressor on or suppressor off");
+            return;
+        }
+
+        _suppressor = args == "on";
+        Save();
+        if (_rifle)
+            SetSuppressor(_rifle, _suppressor);
+        Say($"Rifle suppressor {(_suppressor ? "on" : "off")}");
+    }
+
     [DebugCommand("scopezoom")]
     private static void ScopeZoomCommand(string args)
     {
@@ -732,6 +1083,10 @@ public class RifleScope : SonsMod
                 _trimCm = trim;
             if (parts.Length > 2 && float.TryParse(parts[2], NumberStyles.Float, Inv, out var wind) && wind >= -MaxWindCm && wind <= MaxWindCm)
                 _windCm = wind;
+            if (parts.Length > 3)
+                _enabled = parts[3] != "0";
+            if (parts.Length > 4)
+                _suppressor = parts[4] == "1";
         }
         catch (Exception e)
         {
@@ -743,7 +1098,7 @@ public class RifleScope : SonsMod
     {
         try
         {
-            File.WriteAllText(_configPath, $"{_zoom.ToString(Inv)} {_trimCm.ToString(Inv)} {_windCm.ToString(Inv)}");
+            File.WriteAllText(_configPath, $"{_zoom.ToString(Inv)} {_trimCm.ToString(Inv)} {_windCm.ToString(Inv)} {(_enabled ? "1" : "0")} {(_suppressor ? "1" : "0")}");
         }
         catch (Exception e)
         {

RifleScope.csproj

@@ -6,7 +6,7 @@
         <LangVersion>latest</LangVersion>
         <AssemblyName>RifleScope</AssemblyName>
         <RootNamespace>RifleScope</RootNamespace>
-        <Version>1.0.0</Version>
+        <Version>1.1.0</Version>
         <NoWarn>CS0436;CS1701;CS1702;MSB3277;MSB3106</NoWarn>
     </PropertyGroup>
 

manifest.json

@@ -3,7 +3,7 @@
   "id": "RifleScope",
   "name": "RifleScope",
   "author": "JustinOros",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "Stronger rifle scope magnification and a crosshair reticle",
   "gameVersion": "1.0.0",
   "platform": "Client",