Stamina Tutorial

New defines:
#define REGAIN_RATE 2 // 2 pts per second
#define MAX_STAMINA 100

New Functions/Variables for CBasePlayer:

bool HasEnoughStamina ( int x ); // stamina based on 0 - 100
bool BurnStamina ( int x ); // stamina based on 0 - 100

float m_flRegainStamina;

Add this to CBasePlayer::PreThink()
if (m_flRegainStamina <= gpGlobals->time)
{
	BurnStamina( -REGAIN_RATE );

	// other idea:
	// if (pev->iuser3 != 0)
	// 	BurnStamina ( -pev->iuser3 * .05 ); 
	// else 
	// 	pev->iuser3 += 10;
	// m_flRegainStamina = gpGlobals->time + 1.0;
	// gains 5% per second
}

bool CBasePlayer::BurnStamina ( int burn ) 
{
	if (HasEnoughStamina ( burn ) && burn > 0)
	{ // uses stamina
		pev->iuser3 -= burn;
		m_flRegainStamina = gpGlobals->time + 1.5;
		return true;
	}
	else if ( ((pev->iuser3 - burn) < MAX_STAMINA ) && burn < 0 )
	{ // regains stamina
		pev->iuser3 -= burn;
		m_flRegainStamina = gpGlobals->time + 1.0;
		return true;
	}
	else (!HasEnoughStamina ( burn ))
	{
		m_flRegainStamina = gpGlobals->time + 1.0;
		return false;
	}
}

bool CBasePlayer::HasEnoughStamina ( int stamina )
{
	if ((pev->iuser3 - stamina) >= 0)
		return true;
	else
		return false;
}

CBasePlayer::Spawn():

pPlayer->pev->iuser3 = MAX_STAMINA; // this is full

Basic Usage:

if (BurnStamina(10)) // burn 10pts of stamina for jumping (if we cant, this returns false)
{
// jump
}
else
{
// nothing
}

iuser3 additions:

Add this to client.cpp UpdateClientData()
	cd->iuser3			= ent->v.iuser3;
Add this to delta.lst in clientdata_t
	DEFINE_DELTA( iuser3, DT_INTEGER, 7, 1.0 ),

Client workspace

hud.h (bottom)
extern int g_iStamina; 

entity.cpp HUD_ProcessPlayerState() (towards bottom, other iusers will be there)
	g_iStamina = src->iuser3;

Quick and dirty stamina bar...
hud_redraw.cpp (below includes)
int g_iStamina;

CHud::Think()
FillRGBA( ScreenWidth - XRES(55), (3*ScreenHeight)/4 + YRES(5), XRES( 50 ), YRES( 100 ), 32, 64, 128, 100 );
FillRGBA( ScreenWidth - XRES(50), (3*ScreenHeight)/4, XRES( 40 ), YRES( g_iStamina ), 128, 64, 32, 100 );