float flPerpendicularAngleRad, flCosPerp, flSinPerp;
    {
        const Vector vecForward(vecCenter - g_pCustomGlobals->m_vecWeaponShootPosition);
        const float flAngle = atan2f(vecForward.y, vecForward.x);
        const float flCurrentRotation = DEG2RAD(m_pTarget->angEyeAngles().y);
        const float flNeededRotation = flCurrentRotation - flAngle;

        const float flSin = sinf(flNeededRotation), flCos = cosf(flNeededRotation);
        const Vector vecOldMin(vecMin), vecOldMax(vecMax);

        vecMin.x = vecOldMin.x * flCos - vecOldMin.y * flSin;
        vecMin.y = vecOldMin.x * flSin + vecOldMin.y * flCos;

        vecMax.x = vecOldMax.x * flCos - vecOldMax.y * flSin;
        vecMax.y = vecOldMax.x * flSin + vecOldMax.y * flCos;

        flPerpendicularAngleRad = flAngle - M_PI / 2.f;
        flCosPerp = cosf(flPerpendicularAngleRad);
        flSinPerp = sinf(flPerpendicularAngleRad);
    }

...

            Points.emplace_back(vecCenter.x + flRadius2D * flCosPerp, vecCenter.y + flRadius2D * flSinPerp, vecCenter.z + flRadiusHeight * flPointScale); // Left, top
            Points.emplace_back(vecCenter.x - flRadius2D * flCosPerp, vecCenter.y - flRadius2D * flSinPerp, vecCenter.z + flRadiusHeight * flPointScale); // Right, top