Adding cl_righthand in Half Life 2 tutorial

1. Open up 'c_baseviewmodel.cpp' in your Mods Src folder (C:\MODNAME\src\cl_dll)

2. Scroll down to line 25 and find the line that looks like this:

#ifdef CSTRIKE_DLL 
ConVar cl_righthand( "cl_righthand", "1", FCVAR_ARCHIVE, "Use right-handed view models." ); 
#endif  

Change It To This:

// #ifdef CSTRIKE_DLL 
ConVar cl_righthand( "cl_righthand", "1", FCVAR_ARCHIVE, "Use right-handed view models." ); 
// #endif  

3.Scroll down to line 177 and find the line that looks like this:

//Tony; changed for SDK so that the CSS models can be flipped out of the box.
#if defined( CSTRIKE_DLL ) || defined ( SDK_DLL )
	//Tony; move this up here.
	if (!cl_righthand.GetBool())
		return false;

	// If cl_righthand is set, then we want them all right-handed.
	CBaseCombatWeapon *pWeapon = m_hWeapon.Get();
	if ( pWeapon )
	{
		const FileWeaponInfo_t *pInfo = &pWeapon->GetWpnData();
		//Tony; if they're already built right handed (default) then we can get out.
		if (pInfo->m_bBuiltRightHanded)
			return false;

		return pInfo->m_bAllowFlipping;
	}
#endif

Change It To This:

// #ifdef CSTRIKE_DLL
	// If cl_righthand is set, then we want them all right-handed.
	CBaseCombatWeapon *pWeapon = m_hWeapon.Get();
	if ( pWeapon )
	{
		const FileWeaponInfo_t *pInfo = &pWeapon->GetWpnData();
		return pInfo->m_bAllowFlipping && pInfo->m_bBuiltRightHanded != cl_righthand.GetBool();
	}
// #endif

4. Add a few lines to Your Weapon Script:
Scroll down to where it says "item_flags" "0" and just below it add this:

        "BuiltRightHanded"              "0" 
        "AllowFlipping"                 "1"
	"CSViewModel"			"1"
	"CSWorldModel"			"1"  

e.g. weapon_smg1.txt

// Small Machine Gun 1

WeaponData
{
	// Weapon data is loaded by both the Game and Client DLLs.
	"printname"	"#HL2_SMG1"
	"viewmodel"				"models/weapons/v_smg1.mdl"
	"playermodel"			"models/weapons/w_smg1.mdl"
	"anim_prefix"			"smg2"
	"bucket"				"2"
	"bucket_position"		"0"

	"clip_size"				"45"
	"clip2_size"			"-1"

	"default_clip"			"45"
	"default_clip2"			"-1"

	"primary_ammo"			"SMG1"
	"secondary_ammo"		"SMG1_Grenade"

	"weight"				"3"
	"item_flags"			"0"
	"damage"			"8"


        "BuiltRightHanded"              "0" 
        "AllowFlipping"                 "1"
	"CSViewModel"			"1"
	"CSWorldModel"			"1"  





	// Sounds for the weapon. There is a max of 16 sounds per category (i.e. max 16 "single_shot" sounds)
	SoundData
	{
		"reload"			"Weapon_SMG1.Reload"
		"reload_npc"		"Weapon_SMG1.NPC_Reload"
		"empty"				"Weapon_SMG1.Empty"
		"single_shot"		"Weapon_SMG1.Single"
		"single_shot_npc"	"Weapon_SMG1.NPC_Single"
		"special1"			"Weapon_SMG1.Special1"
		"special2"			"Weapon_SMG1.Special2"
		"double_shot"		"Weapon_SMG1.Double"
		"burst"				"Weapon_SMG1.Burst"
	}

	// Weapon Sprite data is loaded by the Client DLL.
	TextureData
	{
		"weapon"
		{
				"font"		"WeaponIcons"
				"character"	"a"
		}
		"weapon_s"
		{	
				"font"		"WeaponIconsSelected"
				"character"	"a"
		}
		"ammo"
		{
				"font"		"WeaponIcons"
				"character"	"r"
		}
		"ammo2"
		{
				"font"		"WeaponIcons"
				"character"	"t"
		}
		"crosshair"
		{
				"font"		"Crosshairs"
				"character"	"Q"
		}
		"autoaim"
		{
				"file"		"sprites/crosshairs"
				"x"			"0"
				"y"			"48"
				"width"		"24"
				"height"	"24"
		}
	}
}

Hope This Helped You Out :D