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game/shared/hl2mp/weapon_hl2mpbase_machinegun.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "cbase.h"
+
+#if defined( CLIENT_DLL )
+	#include "c_hl2mp_player.h"
+#else
+	#include "hl2mp_player.h"
+#endif
+
+#include "weapon_hl2mpbase_machinegun.h"
+#include "in_buttons.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+IMPLEMENT_NETWORKCLASS_ALIASED( HL2MPMachineGun, DT_HL2MPMachineGun )
+
+BEGIN_NETWORK_TABLE( CHL2MPMachineGun, DT_HL2MPMachineGun )
+END_NETWORK_TABLE()
+
+BEGIN_PREDICTION_DATA( CHL2MPMachineGun )
+END_PREDICTION_DATA()
+
+//=========================================================
+//	>> CHLSelectFireMachineGun
+//=========================================================
+BEGIN_DATADESC( CHL2MPMachineGun )
+
+	DEFINE_FIELD( m_nShotsFired,	FIELD_INTEGER ),
+	DEFINE_FIELD( m_flNextSoundTime, FIELD_TIME ),
+
+END_DATADESC()
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CHL2MPMachineGun::CHL2MPMachineGun( void )
+{
+}
+
+const Vector &CHL2MPMachineGun::GetBulletSpread( void )
+{
+	static Vector cone = VECTOR_CONE_3DEGREES;
+	return cone;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//
+//
+//-----------------------------------------------------------------------------
+void CHL2MPMachineGun::PrimaryAttack( void )
+{
+	// Only the player fires this way so we can cast
+	CBasePlayer *pPlayer = ToBasePlayer( GetOwner() );
+	if (!pPlayer)
+		return;
+	
+	// Abort here to handle burst and auto fire modes
+	if ( (UsesClipsForAmmo1() && m_iClip1 == 0) || ( !UsesClipsForAmmo1() && !pPlayer->GetAmmoCount(m_iPrimaryAmmoType) ) )
+		return;
+
+	m_nShotsFired++;
+
+	pPlayer->DoMuzzleFlash();
+
+	// To make the firing framerate independent, we may have to fire more than one bullet here on low-framerate systems, 
+	// especially if the weapon we're firing has a really fast rate of fire.
+	int iBulletsToFire = 0;
+	float fireRate = GetFireRate();
+
+	while ( m_flNextPrimaryAttack <= gpGlobals->curtime )
+	{
+		// MUST call sound before removing a round from the clip of a CHLMachineGun
+		WeaponSound(SINGLE, m_flNextPrimaryAttack);
+		m_flNextPrimaryAttack = m_flNextPrimaryAttack + fireRate;
+		iBulletsToFire++;
+	}
+
+	// Make sure we don't fire more than the amount in the clip, if this weapon uses clips
+	if ( UsesClipsForAmmo1() )
+	{
+		if ( iBulletsToFire > m_iClip1 )
+			iBulletsToFire = m_iClip1;
+		m_iClip1 -= iBulletsToFire;
+	}
+
+	CHL2MP_Player *pHL2MPPlayer = ToHL2MPPlayer( pPlayer );
+
+		// Fire the bullets
+	FireBulletsInfo_t info;
+	info.m_iShots = iBulletsToFire;
+	info.m_vecSrc = pHL2MPPlayer->Weapon_ShootPosition( );
+	info.m_vecDirShooting = pPlayer->GetAutoaimVector( AUTOAIM_5DEGREES );
+	info.m_vecSpread = pHL2MPPlayer->GetAttackSpread( this );
+	info.m_flDistance = MAX_TRACE_LENGTH;
+	info.m_iAmmoType = m_iPrimaryAmmoType;
+	info.m_iTracerFreq = 2;
+	FireBullets( info );
+
+	//Factor in the view kick
+	AddViewKick();
+	
+	if (!m_iClip1 && pPlayer->GetAmmoCount(m_iPrimaryAmmoType) <= 0)
+	{
+		// HEV suit - indicate out of ammo condition
+		pPlayer->SetSuitUpdate("!HEV_AMO0", FALSE, 0); 
+	}
+
+	SendWeaponAnim( GetPrimaryAttackActivity() );
+	pPlayer->SetAnimation( PLAYER_ATTACK1 );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+//-----------------------------------------------------------------------------
+void CHL2MPMachineGun::FireBullets( const FireBulletsInfo_t &info )
+{
+	if(CBasePlayer *pPlayer = ToBasePlayer ( GetOwner() ) )
+	{
+		pPlayer->FireBullets(info);
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHL2MPMachineGun::DoMachineGunKick( CBasePlayer *pPlayer, float dampEasy, float maxVerticleKickAngle, float fireDurationTime, float slideLimitTime )
+{
+	#define	KICK_MIN_X			0.2f	//Degrees
+	#define	KICK_MIN_Y			0.2f	//Degrees
+	#define	KICK_MIN_Z			0.1f	//Degrees
+
+	QAngle vecScratch;
+	int iSeed = CBaseEntity::GetPredictionRandomSeed() & 255;
+	
+	//Find how far into our accuracy degradation we are
+	float duration	= ( fireDurationTime > slideLimitTime ) ? slideLimitTime : fireDurationTime;
+	float kickPerc = duration / slideLimitTime;
+
+	// do this to get a hard discontinuity, clear out anything under 10 degrees punch
+	pPlayer->ViewPunchReset( 10 );
+
+	//Apply this to the view angles as well
+	vecScratch.x = -( KICK_MIN_X + ( maxVerticleKickAngle * kickPerc ) );
+	vecScratch.y = -( KICK_MIN_Y + ( maxVerticleKickAngle * kickPerc ) ) / 3;
+	vecScratch.z = KICK_MIN_Z + ( maxVerticleKickAngle * kickPerc ) / 8;
+
+	RandomSeed( iSeed );
+
+	//Wibble left and right
+	if ( RandomInt( -1, 1 ) >= 0 )
+		vecScratch.y *= -1;
+
+	iSeed++;
+
+	//Wobble up and down
+	if ( RandomInt( -1, 1 ) >= 0 )
+		vecScratch.z *= -1;
+
+	//Clip this to our desired min/max
+	UTIL_ClipPunchAngleOffset( vecScratch, pPlayer->m_Local.m_vecPunchAngle, QAngle( 24.0f, 3.0f, 1.0f ) );
+
+	//Add it to the view punch
+	// NOTE: 0.5 is just tuned to match the old effect before the punch became simulated
+	pPlayer->ViewPunch( vecScratch * 0.5 );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Reset our shots fired
+//-----------------------------------------------------------------------------
+bool CHL2MPMachineGun::Deploy( void )
+{
+	m_nShotsFired = 0;
+
+	return BaseClass::Deploy();
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Make enough sound events to fill the estimated think interval
+// returns: number of shots needed
+//-----------------------------------------------------------------------------
+int CHL2MPMachineGun::WeaponSoundRealtime( WeaponSound_t shoot_type )
+{
+	int numBullets = 0;
+
+	// ran out of time, clamp to current
+	if (m_flNextSoundTime < gpGlobals->curtime)
+	{
+		m_flNextSoundTime = gpGlobals->curtime;
+	}
+
+	// make enough sound events to fill up the next estimated think interval
+	float dt = clamp( m_flAnimTime - m_flPrevAnimTime, 0, 0.2 );
+	if (m_flNextSoundTime < gpGlobals->curtime + dt)
+	{
+		WeaponSound( SINGLE_NPC, m_flNextSoundTime );
+		m_flNextSoundTime += GetFireRate();
+		numBullets++;
+	}
+	if (m_flNextSoundTime < gpGlobals->curtime + dt)
+	{
+		WeaponSound( SINGLE_NPC, m_flNextSoundTime );
+		m_flNextSoundTime += GetFireRate();
+		numBullets++;
+	}
+
+	return numBullets;
+}
+
+
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHL2MPMachineGun::ItemPostFrame( void )
+{
+	CBasePlayer *pOwner = ToBasePlayer( GetOwner() );
+	
+	if ( pOwner == NULL )
+		return;
+
+	// Debounce the recoiling counter
+	if ( ( pOwner->m_nButtons & IN_ATTACK ) == false )
+	{
+		m_nShotsFired = 0;
+	}
+
+	BaseClass::ItemPostFrame();
+}
+
+