Magazine style reloads

This will be a short and simple one! Say you want to make each shot and each reload count? In CS you can reload anytime you feel like. Some bullets will be deducted and that is all. However, in real life, you will not start to load the half-empty mag, you pull out a new one, and throw away the used one. OK you don't throw it away but anyway. This system can be found in BF2, and some other games. So now to the code: Look up the basecombatweapon_shared.cpp and go to the FinishReload procedure. You will mod this part:

if ( UsesClipsForAmmo1() )
{
	int primary = min( GetMaxClip1() - m_iClip1, pOwner->GetAmmoCount(m_iPrimaryAmmoType));	
	m_iClip1 += primary;
	pOwner->RemoveAmmo( primary, m_iPrimaryAmmoType);
}

to look like this:

if ( UsesClipsForAmmo1() )
{
	//int primary = min( GetMaxClip1() - m_iClip1, pOwner->GetAmmoCount(m_iPrimaryAmmoType));	
	m_iClip1 = GetMaxClip1();
	pOwner->RemoveAmmo( 1, m_iPrimaryAmmoType);
}

This tells the game to fully reload the gun and deduct 1 from the iPrimaryAmmoType. From now on, the iPrimaryAmmoType will contain the number of full magazines instead of the number of bullets.

You can also do this for secondary fire if you have a weapon which needs reloading. Just substitute primary for secondary.

If you step on a weapon with ammo in the magazine, the game grants you the ammo in the magazine. Unfortunately, in a magazine style ammo system, this will grant 30 magazines instead of 30 bullets. To correct this find BaseCombatCharacter.cpp and go to the Weapon_EquipAmmoOnly function. Change the code:

int	primaryGiven	= (pWeapon->UsesClipsForAmmo1()) ? pWeapon->m_iClip1 : pWeapon->GetPrimaryAmmoCount();
int secondaryGiven	= (pWeapon->UsesClipsForAmmo2()) ? pWeapon->m_iClip2 : pWeapon->GetSecondaryAmmoCount();
int takenPrimary   = GiveAmmo( primaryGiven, pWeapon->m_iPrimaryAmmoType); 
int takenSecondary = GiveAmmo( secondaryGiven, pWeapon->m_iSecondaryAmmoType); 

To read:

int	primaryGiven	= (pWeapon->UsesClipsForAmmo1()) ? pWeapon->m_iClip1 : pWeapon->GetPrimaryAmmoCount();
int secondaryGiven	= (pWeapon->UsesClipsForAmmo2()) ? pWeapon->m_iClip2 : pWeapon->GetSecondaryAmmoCount();
// Don't give 30 magazines for picking up a weapon
// with 30 bullets.
if (primaryGiven > 0) primaryGiven = 1;
if (secondaryGiven > 0) secondaryGiven = 1;
int takenPrimary   = GiveAmmo( primaryGiven, pWeapon->m_iPrimaryAmmoType); 
int takenSecondary = GiveAmmo( secondaryGiven, pWeapon->m_iSecondaryAmmoType); 

Now you will receive one magazine, instead of 30. While this fix has the potential to add some bullets into the game, it is better than nothing. A better fix would require a system where you can save magazines without throwing them away.

You will notice, that the game will still grant you 30 or more bullets if you pick up an ammo crate. Now go to the items.h and mod this part to your liking. You will receive the amount of full magazines, you specify here. Whenever you pick up an ammo crate.

#define SIZE_AMMO_PISTOL			12
#define SIZE_AMMO_PISTOL_LARGE		100
#define SIZE_AMMO_SMG1				30
#define SIZE_AMMO_SMG1_LARGE		225
#define SIZE_AMMO_AR2				20
#define SIZE_AMMO_AR2_LARGE			100
#define SIZE_AMMO_RPG_ROUND			1
#define SIZE_AMMO_SMG1_GRENADE		1
#define SIZE_AMMO_BUCKSHOT			20
#define SIZE_AMMO_357				6
#define SIZE_AMMO_357_LARGE			20
#define SIZE_AMMO_CROSSBOW			6
#define SIZE_AMMO_AR2_ALTFIRE		1

You get some ammo at the start. That should be modded as well. Go to the hl2mp_player.cpp and look up the GiveDefaultItems procedure. Mod the part below to your liking. You will get the specified amount of magazines at start.

	CBasePlayer::GiveAmmo( 255,	"Pistol");
	CBasePlayer::GiveAmmo( 45,	"SMG1");
	CBasePlayer::GiveAmmo( 1,	"grenade" );
	CBasePlayer::GiveAmmo( 6,	"Buckshot");
	CBasePlayer::GiveAmmo( 6,	"357" );

Ever noticed, that the game auto-reloads your gun if you holster it? This is not so good, if you have this magazine system. To remove this go to the weapon_hl2mpbasehlmpcombatweapon.cpp and find the ItemHolsterFrame procedure. Comment out the

	FinishReload();

Line and you are good.

Finally, it is not realistic to hold 200 magazines. Decrease this value in hl2mp_gamerules.cpp. At the end of the file there is an AmmoDef part like the one below.

	def.AddAmmoType("AR2", DMG_BULLET, TRACER_LINE_AND_WHIZ, 0, 0, 60, BULLET_IMPULSE(200, 1225), 0 );

The 60 shows the max amount of ammo, the player can hold. If you change it to 5 then you can have maximum 5 reloads. You are now finished! It would take more tinkering to have a true magazine system, which does not throw away the used magazines.

Idea! I was reading this and started to think that you can actually make this work by just modifying magazine-reloading weapons to remove ammo amount of new magazine(GetMaxClip1()) and just modify hud to shot remaining ammo/30 or leave it as it is.