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game/server/hl2/grenade_frag.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "basegrenade_shared.h"
+#include "grenade_frag.h"
+#include "Sprite.h"
+#include "SpriteTrail.h"
+#include "soundent.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#define FRAG_GRENADE_BLIP_FREQUENCY			1.0f
+#define FRAG_GRENADE_BLIP_FAST_FREQUENCY	0.3f
+
+#define FRAG_GRENADE_GRACE_TIME_AFTER_PICKUP 1.5f
+#define FRAG_GRENADE_WARN_TIME 1.5f
+
+const float GRENADE_COEFFICIENT_OF_RESTITUTION = 0.2f;
+
+ConVar sk_plr_dmg_fraggrenade	( "sk_plr_dmg_fraggrenade","0");
+ConVar sk_npc_dmg_fraggrenade	( "sk_npc_dmg_fraggrenade","0");
+ConVar sk_fraggrenade_radius	( "sk_fraggrenade_radius", "0");
+
+#define GRENADE_MODEL "models/Weapons/w_grenade.mdl"
+
+class CGrenadeFrag : public CBaseGrenade
+{
+	DECLARE_CLASS( CGrenadeFrag, CBaseGrenade );
+
+#if !defined( CLIENT_DLL )
+	DECLARE_DATADESC();
+#endif
+					
+	~CGrenadeFrag( void );
+
+public:
+	void	Spawn( void );
+	void	OnRestore( void );
+	void	Precache( void );
+	bool	CreateVPhysics( void );
+	void	CreateEffects( void );
+	void	SetTimer( float detonateDelay, float warnDelay );
+	void	SetVelocity( const Vector &velocity, const AngularImpulse &angVelocity );
+	int		OnTakeDamage( const CTakeDamageInfo &inputInfo );
+	void	BlipSound() { EmitSound( "Grenade.Blip" ); }
+	void	DelayThink();
+	void	VPhysicsUpdate( IPhysicsObject *pPhysics );
+	void	OnPhysGunPickup( CBasePlayer *pPhysGunUser, PhysGunPickup_t reason );
+	void	SetCombineSpawned( bool combineSpawned ) { m_combineSpawned = combineSpawned; }
+	bool	IsCombineSpawned( void ) const { return m_combineSpawned; }
+	void	SetPunted( bool punt ) { m_punted = punt; }
+	bool	WasPunted( void ) const { return m_punted; }
+
+	// this function only used in episodic.
+#if defined(HL2_EPISODIC) && 0 // FIXME: HandleInteraction() is no longer called now that base grenade derives from CBaseAnimating
+	bool	HandleInteraction(int interactionType, void *data, CBaseCombatCharacter* sourceEnt);
+#endif 
+
+	void	InputSetTimer( inputdata_t &inputdata );
+
+protected:
+	CHandle<CSprite>		m_pMainGlow;
+	CHandle<CSpriteTrail>	m_pGlowTrail;
+
+	float	m_flNextBlipTime;
+	bool	m_inSolid;
+	bool	m_combineSpawned;
+	bool	m_punted;
+};
+
+LINK_ENTITY_TO_CLASS( npc_grenade_frag, CGrenadeFrag );
+
+BEGIN_DATADESC( CGrenadeFrag )
+
+	// Fields
+	DEFINE_FIELD( m_pMainGlow, FIELD_EHANDLE ),
+	DEFINE_FIELD( m_pGlowTrail, FIELD_EHANDLE ),
+	DEFINE_FIELD( m_flNextBlipTime, FIELD_TIME ),
+	DEFINE_FIELD( m_inSolid, FIELD_BOOLEAN ),
+	DEFINE_FIELD( m_combineSpawned, FIELD_BOOLEAN ),
+	DEFINE_FIELD( m_punted, FIELD_BOOLEAN ),
+	
+	// Function Pointers
+	DEFINE_THINKFUNC( DelayThink ),
+
+	// Inputs
+	DEFINE_INPUTFUNC( FIELD_FLOAT, "SetTimer", InputSetTimer ),
+
+END_DATADESC()
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CGrenadeFrag::~CGrenadeFrag( void )
+{
+}
+
+void CGrenadeFrag::Spawn( void )
+{
+	Precache( );
+
+	SetModel( GRENADE_MODEL );
+
+	if( GetOwnerEntity() && GetOwnerEntity()->IsPlayer() )
+	{
+		m_flDamage		= sk_plr_dmg_fraggrenade.GetFloat();
+		m_DmgRadius		= sk_fraggrenade_radius.GetFloat();
+	}
+	else
+	{
+		m_flDamage		= sk_npc_dmg_fraggrenade.GetFloat();
+		m_DmgRadius		= sk_fraggrenade_radius.GetFloat();
+	}
+
+	m_takedamage	= DAMAGE_YES;
+	m_iHealth		= 1;
+
+	SetSize( -Vector(4,4,4), Vector(4,4,4) );
+	SetCollisionGroup( COLLISION_GROUP_WEAPON );
+	CreateVPhysics();
+
+	BlipSound();
+	m_flNextBlipTime = gpGlobals->curtime + FRAG_GRENADE_BLIP_FREQUENCY;
+
+	AddSolidFlags( FSOLID_NOT_STANDABLE );
+
+	m_combineSpawned	= false;
+	m_punted			= false;
+
+	BaseClass::Spawn();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CGrenadeFrag::OnRestore( void )
+{
+	// If we were primed and ready to detonate, put FX on us.
+	if (m_flDetonateTime > 0)
+		CreateEffects();
+
+	BaseClass::OnRestore();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CGrenadeFrag::CreateEffects( void )
+{
+	// Start up the eye glow
+	m_pMainGlow = CSprite::SpriteCreate( "sprites/redglow1.vmt", GetLocalOrigin(), false );
+
+	int	nAttachment = LookupAttachment( "fuse" );
+
+	if ( m_pMainGlow != NULL )
+	{
+		m_pMainGlow->FollowEntity( this );
+		m_pMainGlow->SetAttachment( this, nAttachment );
+		m_pMainGlow->SetTransparency( kRenderGlow, 255, 255, 255, 200, kRenderFxNoDissipation );
+		m_pMainGlow->SetScale( 0.2f );
+		m_pMainGlow->SetGlowProxySize( 4.0f );
+	}
+
+	// Start up the eye trail
+	m_pGlowTrail	= CSpriteTrail::SpriteTrailCreate( "sprites/bluelaser1.vmt", GetLocalOrigin(), false );
+
+	if ( m_pGlowTrail != NULL )
+	{
+		m_pGlowTrail->FollowEntity( this );
+		m_pGlowTrail->SetAttachment( this, nAttachment );
+		m_pGlowTrail->SetTransparency( kRenderTransAdd, 255, 0, 0, 255, kRenderFxNone );
+		m_pGlowTrail->SetStartWidth( 8.0f );
+		m_pGlowTrail->SetEndWidth( 1.0f );
+		m_pGlowTrail->SetLifeTime( 0.5f );
+	}
+}
+
+bool CGrenadeFrag::CreateVPhysics()
+{
+	// Create the object in the physics system
+	VPhysicsInitNormal( SOLID_BBOX, 0, false );
+	return true;
+}
+
+// this will hit only things that are in newCollisionGroup, but NOT in collisionGroupAlreadyChecked
+class CTraceFilterCollisionGroupDelta : public CTraceFilterEntitiesOnly
+{
+public:
+	// It does have a base, but we'll never network anything below here..
+	DECLARE_CLASS_NOBASE( CTraceFilterCollisionGroupDelta );
+	
+	CTraceFilterCollisionGroupDelta( const IHandleEntity *passentity, int collisionGroupAlreadyChecked, int newCollisionGroup )
+		: m_pPassEnt(passentity), m_collisionGroupAlreadyChecked( collisionGroupAlreadyChecked ), m_newCollisionGroup( newCollisionGroup )
+	{
+	}
+	
+	virtual bool ShouldHitEntity( IHandleEntity *pHandleEntity, int contentsMask )
+	{
+		if ( !PassServerEntityFilter( pHandleEntity, m_pPassEnt ) )
+			return false;
+		CBaseEntity *pEntity = EntityFromEntityHandle( pHandleEntity );
+
+		if ( pEntity )
+		{
+			if ( g_pGameRules->ShouldCollide( m_collisionGroupAlreadyChecked, pEntity->GetCollisionGroup() ) )
+				return false;
+			if ( g_pGameRules->ShouldCollide( m_newCollisionGroup, pEntity->GetCollisionGroup() ) )
+				return true;
+		}
+
+		return false;
+	}
+
+protected:
+	const IHandleEntity *m_pPassEnt;
+	int		m_collisionGroupAlreadyChecked;
+	int		m_newCollisionGroup;
+};
+
+void CGrenadeFrag::VPhysicsUpdate( IPhysicsObject *pPhysics )
+{
+	BaseClass::VPhysicsUpdate( pPhysics );
+	Vector vel;
+	AngularImpulse angVel;
+	pPhysics->GetVelocity( &vel, &angVel );
+	
+	Vector start = GetAbsOrigin();
+	// find all entities that my collision group wouldn't hit, but COLLISION_GROUP_NONE would and bounce off of them as a ray cast
+	CTraceFilterCollisionGroupDelta filter( this, GetCollisionGroup(), COLLISION_GROUP_NONE );
+	trace_t tr;
+
+	// UNDONE: Hull won't work with hitboxes - hits outer hull.  But the whole point of this test is to hit hitboxes.
+#if 0
+	UTIL_TraceHull( start, start + vel * gpGlobals->frametime, CollisionProp()->OBBMins(), CollisionProp()->OBBMaxs(), CONTENTS_HITBOX|CONTENTS_MONSTER|CONTENTS_SOLID, &filter, &tr );
+#else
+	UTIL_TraceLine( start, start + vel * gpGlobals->frametime, CONTENTS_HITBOX|CONTENTS_MONSTER|CONTENTS_SOLID, &filter, &tr );
+#endif
+	if ( tr.startsolid )
+	{
+		if ( !m_inSolid )
+		{
+			// UNDONE: Do a better contact solution that uses relative velocity?
+			vel *= -GRENADE_COEFFICIENT_OF_RESTITUTION; // bounce backwards
+			pPhysics->SetVelocity( &vel, NULL );
+		}
+		m_inSolid = true;
+		return;
+	}
+	m_inSolid = false;
+	if ( tr.DidHit() )
+	{
+		Vector dir = vel;
+		VectorNormalize(dir);
+		// send a tiny amount of damage so the character will react to getting bonked
+		CTakeDamageInfo info( this, GetThrower(), pPhysics->GetMass() * vel, GetAbsOrigin(), 0.1f, DMG_CRUSH );
+		tr.m_pEnt->TakeDamage( info );
+
+		// reflect velocity around normal
+		vel = -2.0f * tr.plane.normal * DotProduct(vel,tr.plane.normal) + vel;
+		
+		// absorb 80% in impact
+		vel *= GRENADE_COEFFICIENT_OF_RESTITUTION;
+		angVel *= -0.5f;
+		pPhysics->SetVelocity( &vel, &angVel );
+	}
+}
+
+
+void CGrenadeFrag::Precache( void )
+{
+	PrecacheModel( GRENADE_MODEL );
+
+	PrecacheScriptSound( "Grenade.Blip" );
+
+	PrecacheModel( "sprites/redglow1.vmt" );
+	PrecacheModel( "sprites/bluelaser1.vmt" );
+
+	BaseClass::Precache();
+}
+
+void CGrenadeFrag::SetTimer( float detonateDelay, float warnDelay )
+{
+	m_flDetonateTime = gpGlobals->curtime + detonateDelay;
+	m_flWarnAITime = gpGlobals->curtime + warnDelay;
+	SetThink( &CGrenadeFrag::DelayThink );
+	SetNextThink( gpGlobals->curtime );
+
+	CreateEffects();
+}
+
+void CGrenadeFrag::OnPhysGunPickup( CBasePlayer *pPhysGunUser, PhysGunPickup_t reason )
+{
+	SetThrower( pPhysGunUser );
+
+#ifdef HL2MP
+	SetTimer( FRAG_GRENADE_GRACE_TIME_AFTER_PICKUP, FRAG_GRENADE_GRACE_TIME_AFTER_PICKUP / 2);
+
+	BlipSound();
+	m_flNextBlipTime = gpGlobals->curtime + FRAG_GRENADE_BLIP_FAST_FREQUENCY;
+	m_bHasWarnedAI = true;
+#else
+	if( IsX360() )
+	{
+		// Give 'em a couple of seconds to aim and throw. 
+		SetTimer( 2.0f, 1.0f);
+		BlipSound();
+		m_flNextBlipTime = gpGlobals->curtime + FRAG_GRENADE_BLIP_FAST_FREQUENCY;
+	}
+#endif
+
+#ifdef HL2_EPISODIC
+	SetPunted( true );
+#endif
+
+	BaseClass::OnPhysGunPickup( pPhysGunUser, reason );
+}
+
+void CGrenadeFrag::DelayThink() 
+{
+	if( gpGlobals->curtime > m_flDetonateTime )
+	{
+		Detonate();
+		return;
+	}
+
+	if( !m_bHasWarnedAI && gpGlobals->curtime >= m_flWarnAITime )
+	{
+#if !defined( CLIENT_DLL )
+		CSoundEnt::InsertSound ( SOUND_DANGER, GetAbsOrigin(), 400, 1.5, this );
+#endif
+		m_bHasWarnedAI = true;
+	}
+	
+	if( gpGlobals->curtime > m_flNextBlipTime )
+	{
+		BlipSound();
+		
+		if( m_bHasWarnedAI )
+		{
+			m_flNextBlipTime = gpGlobals->curtime + FRAG_GRENADE_BLIP_FAST_FREQUENCY;
+		}
+		else
+		{
+			m_flNextBlipTime = gpGlobals->curtime + FRAG_GRENADE_BLIP_FREQUENCY;
+		}
+	}
+
+	SetNextThink( gpGlobals->curtime + 0.1 );
+}
+
+void CGrenadeFrag::SetVelocity( const Vector &velocity, const AngularImpulse &angVelocity )
+{
+	IPhysicsObject *pPhysicsObject = VPhysicsGetObject();
+	if ( pPhysicsObject )
+	{
+		pPhysicsObject->AddVelocity( &velocity, &angVelocity );
+	}
+}
+
+int CGrenadeFrag::OnTakeDamage( const CTakeDamageInfo &inputInfo )
+{
+	// Manually apply vphysics because BaseCombatCharacter takedamage doesn't call back to CBaseEntity OnTakeDamage
+	VPhysicsTakeDamage( inputInfo );
+
+	// Grenades only suffer blast damage and burn damage.
+	if( !(inputInfo.GetDamageType() & (DMG_BLAST|DMG_BURN) ) )
+		return 0;
+
+	return BaseClass::OnTakeDamage( inputInfo );
+}
+
+#if defined(HL2_EPISODIC) && 0 // FIXME: HandleInteraction() is no longer called now that base grenade derives from CBaseAnimating
+extern int	g_interactionBarnacleVictimGrab; ///< usually declared in ai_interactions.h but no reason to haul all of that in here.
+extern int g_interactionBarnacleVictimBite;
+extern int g_interactionBarnacleVictimReleased;
+bool CGrenadeFrag::HandleInteraction(int interactionType, void *data, CBaseCombatCharacter* sourceEnt)
+{
+	// allow fragnades to be grabbed by barnacles. 
+	if ( interactionType == g_interactionBarnacleVictimGrab )
+	{
+		// give the grenade another five seconds seconds so the player can have the satisfaction of blowing up the barnacle with it
+		float timer = m_flDetonateTime - gpGlobals->curtime + 5.0f;
+		SetTimer( timer, timer - FRAG_GRENADE_WARN_TIME );
+
+		return true;
+	}
+	else if ( interactionType == g_interactionBarnacleVictimBite )
+	{
+		// detonate the grenade immediately 
+		SetTimer( 0, 0 );
+		return true;
+	}
+	else if ( interactionType == g_interactionBarnacleVictimReleased )
+	{
+		// take the five seconds back off the timer.
+		float timer = MAX(m_flDetonateTime - gpGlobals->curtime - 5.0f,0.0f);
+		SetTimer( timer, timer - FRAG_GRENADE_WARN_TIME );
+		return true;
+	}
+	else
+	{
+		return BaseClass::HandleInteraction( interactionType, data, sourceEnt );
+	}
+}
+#endif
+
+void CGrenadeFrag::InputSetTimer( inputdata_t &inputdata )
+{
+	SetTimer( inputdata.value.Float(), inputdata.value.Float() - FRAG_GRENADE_WARN_TIME );
+}
+
+CBaseGrenade *Fraggrenade_Create( const Vector &position, const QAngle &angles, const Vector &velocity, const AngularImpulse &angVelocity, CBaseEntity *pOwner, float timer, bool combineSpawned )
+{
+	// Don't set the owner here, or the player can't interact with grenades he's thrown
+	CGrenadeFrag *pGrenade = (CGrenadeFrag *)CBaseEntity::Create( "npc_grenade_frag", position, angles, pOwner );
+	
+	pGrenade->SetTimer( timer, timer - FRAG_GRENADE_WARN_TIME );
+	pGrenade->SetVelocity( velocity, angVelocity );
+	pGrenade->SetThrower( ToBaseCombatCharacter( pOwner ) );
+	pGrenade->m_takedamage = DAMAGE_EVENTS_ONLY;
+	pGrenade->SetCombineSpawned( combineSpawned );
+
+	return pGrenade;
+}
+
+bool Fraggrenade_WasPunted( const CBaseEntity *pEntity )
+{
+	const CGrenadeFrag *pFrag = dynamic_cast<const CGrenadeFrag *>( pEntity );
+	if ( pFrag )
+	{
+		return pFrag->WasPunted();
+	}
+
+	return false;
+}
+
+bool Fraggrenade_WasCreatedByCombine( const CBaseEntity *pEntity )
+{
+	const CGrenadeFrag *pFrag = dynamic_cast<const CGrenadeFrag *>( pEntity );
+	if ( pFrag )
+	{
+		return pFrag->IsCombineSpawned();
+	}
+
+	return false;
+}