From 71c541af4fcf823b0f47b9f4b5636758d6821033 Mon Sep 17 00:00:00 2001
From: BenCat07 <BenCat07@gmail.com>
Date: Wed, 2 Sep 2020 21:10:03 +0200
Subject: [PATCH] Add an Auto Viewmodel flipper

---
 data/menu/nullifiedcat/aimbot.xml    |  1 +
 include/reclasses/C_TFWeaponBase.hpp |  5 +++
 src/hacks/AutoViewmodel.cpp          | 61 ++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 src/hacks/AutoViewmodel.cpp

diff --git a/data/menu/nullifiedcat/aimbot.xml b/data/menu/nullifiedcat/aimbot.xml
index 11b69b30..cd427f05 100755
--- a/data/menu/nullifiedcat/aimbot.xml
+++ b/data/menu/nullifiedcat/aimbot.xml
@@ -20,6 +20,7 @@
             <AutoVariable width="fill" target="aimbot.miss-chance" label="Miss chance" tooltip="% chance the aimbot will miss on purpose."/>
             <AutoVariable width="fill" target="aimbot.extrapolate" label="Extrapolate"/>
             <AutoVariable width="fill" target="aimbot.zoomed-only" label="Zoomed only" tooltip="If applicable, the aimbot will only shoot if you are scoped in."/>
+            <AutoVariable width="fill" target="misc.auto-flip-viewmodel" label="Flip Viewmodel" tooltip="Automatically flip the viewmodel for projectile weapons."/>
         </List>
     </Box>
     <Box padding="12 6 6 6" width="content" height="content" name="Autoshoot" y="215">
diff --git a/include/reclasses/C_TFWeaponBase.hpp b/include/reclasses/C_TFWeaponBase.hpp
index 0488e147..dd1714f3 100644
--- a/include/reclasses/C_TFWeaponBase.hpp
+++ b/include/reclasses/C_TFWeaponBase.hpp
@@ -42,6 +42,11 @@ public:
         typedef int (*fn_t)(IClientEntity *);
         return vfunc<fn_t>(self, offsets::PlatformOffset(445, offsets::undefined, 445), 0)(self);
     }
+    inline static bool IsViewModelFlipped(IClientEntity *self)
+    {
+        typedef bool (*fn_t)(IClientEntity *);
+        return vfunc<fn_t>(self, offsets::PlatformOffset(494, offsets::undefined, 494), 0)(self);
+    }
     inline static IClientEntity *GetOwnerViaInterface(IClientEntity *self)
     {
         typedef IClientEntity *(*fn_t)(IClientEntity *);
diff --git a/src/hacks/AutoViewmodel.cpp b/src/hacks/AutoViewmodel.cpp
new file mode 100644
index 00000000..d53e9b94
--- /dev/null
+++ b/src/hacks/AutoViewmodel.cpp
@@ -0,0 +1,61 @@
+#include "common.hpp"
+
+static settings::Boolean auto_viewmodel_flipper{ "misc.auto-flip-viewmodel", "false" };
+
+void CreateMove()
+{
+    if (!auto_viewmodel_flipper)
+        return;
+    static auto cl_flipviewmodels = g_ICvar->FindVar("cl_flipviewmodels");
+    if (!cl_flipviewmodels)
+    {
+        cl_flipviewmodels = g_ICvar->FindVar("cl_flipviewmodels");
+        return;
+    }
+    static bool defaults = cl_flipviewmodels->GetBool();
+
+    // Should we test if a flip would help?
+    bool should_test_viewmodel = true;
+    for (int i = 1; i <= g_IEngine->GetMaxClients(); i++)
+    {
+        CachedEntity *ent = ENTITY(i);
+        if (CE_BAD(ent) || !ent->m_bEnemy() || !ent->m_bAlivePlayer() || ent == LOCAL_E)
+            continue;
+        auto eye   = g_pLocalPlayer->v_Eye;
+        auto angle = GetAimAtAngles(eye, ent->m_vecOrigin());
+        eye        = getShootPos(angle);
+
+        if (IsVectorVisible(eye, ent->m_vecOrigin()))
+        {
+            should_test_viewmodel = false;
+            break;
+        }
+    }
+    bool keep_flipped = false;
+    // Noone is visible, test if flipping helps
+    if (should_test_viewmodel)
+    {
+        cl_flipviewmodels->SetValue(!cl_flipviewmodels->GetBool());
+        for (int i = 0; i <= g_IEngine->GetMaxClients(); i++)
+        {
+            CachedEntity *ent = ENTITY(i);
+            if (CE_BAD(ent) || !ent->m_bEnemy() || !ent->m_bAlivePlayer() || ent == LOCAL_E)
+                continue;
+            auto eye   = g_pLocalPlayer->v_Eye;
+            auto angle = GetAimAtAngles(eye, ent->m_vecOrigin());
+            eye        = getShootPos(angle);
+
+            if (IsVectorVisible(eye, ent->m_vecOrigin()))
+            {
+                keep_flipped = true;
+                break;
+            }
+        }
+    }
+
+    // Reset status as noone is in range
+    if (!keep_flipped && should_test_viewmodel)
+        cl_flipviewmodels->SetValue(defaults);
+}
+
+static InitRoutine init([]() { EC::Register(EC::CreateMove, CreateMove, "viewmodel_flip_cm"); });