Guide CS2 Anti-Aim Logic — Fixing Broken Angle Manipulation

[byte_corvus]

Anyone else lately finding that their old AA logic is getting absolutely cooked by the latest engine updates? It looks like the recent changes to the Source 2 pipeline have bricked more than a few legacy implementations. If you're still trying to run basic pitch/yaw rotations without accounting for the new sub-tick packet handling, you're going to have a bad time in Premier.

Got my hands on some shared code that's been making the rounds—supposedly AI-generated or 'vibecoded' as some people are calling it—but it's effectively a broken paste in the current state of the game. Let's look at why this logic is falling flat.

The Technical Pitfalls

The main issue isn't just the math; it's the execution context. While the code checks for m_MoveType and attack states, it ignores how the server validates view angles during the sub-tick frames. If you're just slamming outPitch = kPitchMax without verifying the networking state, you're just asking for an entry in the next ban wave.

Spoiler: Outdated AA Logic Snippet

#include "antiaim.h"
#include "sdk/buttons.hpp"
#include <cmath>
 
namespace AntiAim
{
    constexpr std::ptrdiff_t kButtonCurrentStateOffset = 0x8;
 
    static inline float SanitizeViewComponent(float v, float fallback)
    {
        if (!std::isfinite(v)) return fallback;
        return v;
    }
 
    int GetMoveType(uintptr_t pawn)
    {
        if (!pawn) return MOVETYPE_NONE;
        return static_cast<int>(Game::Read<uint32_t>(pawn + SCHEMA_CLIENT("C_BaseEntity", "m_MoveType")));
    }
 
    bool IsAttacking()
    {
        if (!Game::clientBase) return false;
        uintptr_t btnAddr = Game::clientBase + cs2_dumper::buttons::attack;
        uint32_t attackState = Game::Read<uint32_t>(btnAddr + kButtonCurrentStateOffset);
        return (attackState & 1) != 0;
    }
 
    bool Apply(uintptr_t localPawn, float viewPitch, float viewYaw, float& outPitch, float& outYaw)
    {
        state.active = false;
        state.desyncDelta = 0.f;
 
        if (!config.enabled || !localPawn)
            return false;
 
        if (config.pitchType == PITCH_NONE && config.yawType == YAW_NONE)
            return false;
 
        int health = Game::Read<int32_t>(localPawn + SCHEMA_CLIENT("C_BaseEntity", "m_iHealth"));
        if (health <= 0)
            return false;
 
        int moveType = GetMoveType(localPawn);
        if (moveType == MOVETYPE_NONE || moveType == MOVETYPE_LADDER || moveType == MOVETYPE_NOCLIP)
            return false;
 
        if (IsAttacking())
            return false;
 
        viewPitch = SanitizeViewComponent(viewPitch, 0.f);
        viewYaw = SanitizeViewComponent(viewYaw, 0.f);
 
        outPitch = viewPitch;
        outYaw = viewYaw;
 
        switch (config.pitchType)
        {
        case PITCH_NONE:  break;
        case PITCH_DOWN:  outPitch = kPitchMax;  break;
        case PITCH_UP:    outPitch = kPitchMin;  break;
        case PITCH_ZERO:  outPitch = 0.0f;       break;
        default: break;
        }
 
        switch (config.yawType)
        {
        case YAW_NONE:
            break;
        case YAW_BACKWARDS:
            outYaw = NormalizeAngle(outYaw + 180.0f);
            break;
        case YAW_JITTER:
            jitterSide = !jitterSide;
            outYaw = NormalizeAngle(viewYaw +
                (jitterSide ? config.jitterRange : -config.jitterRange));
            break;
        case YAW_SPIN:
            spinAngle = NormalizeAngle(spinAngle + config.spinSpeed);
            outYaw = NormalizeAngle(viewYaw + spinAngle);
            break;
        default:
            break;
        }
 
        outPitch = ClampPitch(outPitch);
        outYaw = NormalizeAngle(outYaw);
 
        state.active = true;
        state.realPitch = viewPitch;
        state.realYaw = viewYaw;
        state.fakePitch = outPitch;
        state.fakeYaw = outYaw;
        float delta = outYaw - viewYaw;
        while (delta > 180.f) delta -= 360.f;
        while (delta < -180.f) delta += 360.f;
        state.desyncDelta = delta;
        state.pitchMode = config.pitchType;
        state.yawMode = config.yawType;
 
        return true;
    }
}

Why it fails in the current meta:

1. Sub-tick validation — The server is much more aggressive about checking if your view angles match your movement vectors between ticks.
2. Button state offsets — Hardcoded offsets for button states like attack are the first things to break after a minor game patch.
3. Angle Desync — Without proper desync and fake-lag implementation, you're just standing backwards and hoping the resolver is worse than your paste.

If you're beginning to dev in C++ for Source 2, stop relying on Claude or O1 to write your math logic. They don't understand the internal networking state of CS2. You need to look closer at how CUserCmd is being handled now and whether you can still manipulate the view angles without triggering the server-side checks.

Has anyone actually managed to get a stable desync working since the last movement system tweak, or is everyone just playing legit until the next big offset dump?