1
0
mirror of https://github.com/alliedmodders/hl2sdk.git synced 2024-12-22 17:47:38 +08:00
hl2sdk/game/server/smoke_trail.cpp
2013-06-26 15:22:04 -07:00

646 lines
19 KiB
C++

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//
//=============================================================================//
#include "cbase.h"
#include "smoke_trail.h"
#include "dt_send.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
#define SMOKETRAIL_ENTITYNAME "env_smoketrail"
#define SPORETRAIL_ENTITYNAME "env_sporetrail"
#define SPOREEXPLOSION_ENTITYNAME "env_sporeexplosion"
#define DUSTTRAIL_ENTITYNAME "env_dusttrail"
//-----------------------------------------------------------------------------
//Data table
//-----------------------------------------------------------------------------
IMPLEMENT_SERVERCLASS_ST(SmokeTrail, DT_SmokeTrail)
SendPropFloat(SENDINFO(m_SpawnRate), 8, 0, 1, 1024),
SendPropVector(SENDINFO(m_StartColor), 8, 0, 0, 1),
SendPropVector(SENDINFO(m_EndColor), 8, 0, 0, 1),
SendPropFloat(SENDINFO(m_ParticleLifetime), 16, SPROP_ROUNDUP, 0.1, 100),
SendPropFloat(SENDINFO(m_StopEmitTime), 0, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MinSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MaxSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MinDirectedSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MaxDirectedSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_StartSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_EndSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_SpawnRadius), -1, SPROP_NOSCALE),
SendPropBool(SENDINFO(m_bEmit) ),
SendPropInt(SENDINFO(m_nAttachment), 32 ),
SendPropFloat(SENDINFO(m_Opacity), -1, SPROP_NOSCALE),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS(env_smoketrail, SmokeTrail);
BEGIN_DATADESC( SmokeTrail )
DEFINE_FIELD( m_StartColor, FIELD_VECTOR ),
DEFINE_FIELD( m_EndColor, FIELD_VECTOR ),
DEFINE_KEYFIELD( m_Opacity, FIELD_FLOAT, "opacity" ),
DEFINE_KEYFIELD( m_SpawnRate, FIELD_FLOAT, "spawnrate" ),
DEFINE_KEYFIELD( m_ParticleLifetime, FIELD_FLOAT, "lifetime" ),
DEFINE_FIELD( m_StopEmitTime, FIELD_TIME ),
DEFINE_KEYFIELD( m_MinSpeed, FIELD_FLOAT, "minspeed" ),
DEFINE_KEYFIELD( m_MaxSpeed, FIELD_FLOAT, "maxspeed" ),
DEFINE_KEYFIELD( m_MinDirectedSpeed, FIELD_FLOAT, "mindirectedspeed" ),
DEFINE_KEYFIELD( m_MaxDirectedSpeed, FIELD_FLOAT, "maxdirectedspeed" ),
DEFINE_KEYFIELD( m_StartSize, FIELD_FLOAT, "startsize" ),
DEFINE_KEYFIELD( m_EndSize, FIELD_FLOAT, "endsize" ),
DEFINE_KEYFIELD( m_SpawnRadius, FIELD_FLOAT, "spawnradius" ),
DEFINE_FIELD( m_bEmit, FIELD_BOOLEAN ),
DEFINE_FIELD( m_nAttachment, FIELD_INTEGER ),
END_DATADESC()
//-----------------------------------------------------------------------------
// Purpose:
// Output :
//-----------------------------------------------------------------------------
SmokeTrail::SmokeTrail()
{
m_SpawnRate = 10;
m_StartColor.GetForModify().Init(0.5, 0.5, 0.5);
m_EndColor.GetForModify().Init(0,0,0);
m_ParticleLifetime = 5;
m_StopEmitTime = 0; // Don't stop emitting particles
m_MinSpeed = 2;
m_MaxSpeed = 4;
m_MinDirectedSpeed = m_MaxDirectedSpeed = 0;
m_StartSize = 35;
m_EndSize = 55;
m_SpawnRadius = 2;
m_bEmit = true;
m_nAttachment = 0;
m_Opacity = 0.5f;
}
//-----------------------------------------------------------------------------
// Parse data from a map file
//-----------------------------------------------------------------------------
bool SmokeTrail::KeyValue( const char *szKeyName, const char *szValue )
{
if ( FStrEq( szKeyName, "startcolor" ) )
{
color32 tmp;
UTIL_StringToColor32( &tmp, szValue );
m_StartColor.GetForModify().Init( tmp.r / 255.0f, tmp.g / 255.0f, tmp.b / 255.0f );
return true;
}
if ( FStrEq( szKeyName, "endcolor" ) )
{
color32 tmp;
UTIL_StringToColor32( &tmp, szValue );
m_EndColor.GetForModify().Init( tmp.r / 255.0f, tmp.g / 255.0f, tmp.b / 255.0f );
return true;
}
if ( FStrEq( szKeyName, "emittime" ) )
{
m_StopEmitTime = gpGlobals->curtime + atof( szValue );
return true;
}
return BaseClass::KeyValue( szKeyName, szValue );
}
//-----------------------------------------------------------------------------
// Purpose :
// Input :
// Output :
//-----------------------------------------------------------------------------
void SmokeTrail::SetEmit(bool bVal)
{
m_bEmit = bVal;
}
//-----------------------------------------------------------------------------
// Purpose:
// Output : SmokeTrail*
//-----------------------------------------------------------------------------
SmokeTrail* SmokeTrail::CreateSmokeTrail()
{
CBaseEntity *pEnt = CreateEntityByName(SMOKETRAIL_ENTITYNAME);
if(pEnt)
{
SmokeTrail *pSmoke = dynamic_cast<SmokeTrail*>(pEnt);
if(pSmoke)
{
pSmoke->Activate();
return pSmoke;
}
else
{
UTIL_Remove(pEnt);
}
}
return NULL;
}
//-----------------------------------------------------------------------------
// Purpose: Attach the smoke trail to an entity or point
// Input : index - entity that has the attachment
// attachment - point to attach to
//-----------------------------------------------------------------------------
void SmokeTrail::FollowEntity( CBaseEntity *pEntity, const char *pAttachmentName )
{
// For attachments
if ( pAttachmentName && pEntity && pEntity->GetBaseAnimating() )
{
m_nAttachment = pEntity->GetBaseAnimating()->LookupAttachment( pAttachmentName );
}
else
{
m_nAttachment = 0;
}
BaseClass::FollowEntity( pEntity );
}
//==================================================
// RocketTrail
//==================================================
//Data table
IMPLEMENT_SERVERCLASS_ST(RocketTrail, DT_RocketTrail)
SendPropFloat(SENDINFO(m_SpawnRate), 8, 0, 1, 1024),
SendPropVector(SENDINFO(m_StartColor), 8, 0, 0, 1),
SendPropVector(SENDINFO(m_EndColor), 8, 0, 0, 1),
SendPropFloat(SENDINFO(m_ParticleLifetime), 16, SPROP_ROUNDUP, 0.1, 100),
SendPropFloat(SENDINFO(m_StopEmitTime), 0, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MinSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MaxSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_StartSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_EndSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_SpawnRadius), -1, SPROP_NOSCALE),
SendPropBool(SENDINFO(m_bEmit)),
SendPropInt(SENDINFO(m_nAttachment), 32 ),
SendPropFloat(SENDINFO(m_Opacity), -1, SPROP_NOSCALE),
SendPropInt (SENDINFO(m_bDamaged), 1, SPROP_UNSIGNED),
SendPropFloat(SENDINFO(m_flFlareScale), -1, SPROP_NOSCALE),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS( env_rockettrail, RocketTrail );
BEGIN_DATADESC( RocketTrail )
DEFINE_FIELD( m_StartColor, FIELD_VECTOR ),
DEFINE_FIELD( m_EndColor, FIELD_VECTOR ),
DEFINE_FIELD( m_Opacity, FIELD_FLOAT ),
DEFINE_FIELD( m_SpawnRate, FIELD_FLOAT ),
DEFINE_FIELD( m_ParticleLifetime, FIELD_FLOAT ),
DEFINE_FIELD( m_StopEmitTime, FIELD_TIME ),
DEFINE_FIELD( m_MinSpeed, FIELD_FLOAT ),
DEFINE_FIELD( m_MaxSpeed, FIELD_FLOAT ),
DEFINE_FIELD( m_StartSize, FIELD_FLOAT ),
DEFINE_FIELD( m_EndSize, FIELD_FLOAT ),
DEFINE_FIELD( m_SpawnRadius, FIELD_FLOAT ),
DEFINE_FIELD( m_bEmit, FIELD_BOOLEAN ),
DEFINE_FIELD( m_nAttachment, FIELD_INTEGER ),
DEFINE_FIELD( m_bDamaged, FIELD_BOOLEAN ),
DEFINE_FIELD( m_flFlareScale, FIELD_FLOAT ),
END_DATADESC()
//-----------------------------------------------------------------------------
// Purpose:
// Output :
//-----------------------------------------------------------------------------
RocketTrail::RocketTrail()
{
m_SpawnRate = 10;
m_StartColor.GetForModify().Init(0.5, 0.5, 0.5);
m_EndColor.GetForModify().Init(0,0,0);
m_ParticleLifetime = 5;
m_StopEmitTime = 0; // Don't stop emitting particles
m_MinSpeed = 2;
m_MaxSpeed = 4;
m_StartSize = 35;
m_EndSize = 55;
m_SpawnRadius = 2;
m_bEmit = true;
m_nAttachment = 0;
m_Opacity = 0.5f;
m_flFlareScale = 1.5;
}
//------------------------------------------------------------------------------
// Purpose :
// Input :
// Output :
//------------------------------------------------------------------------------
void RocketTrail::SetEmit(bool bVal)
{
m_bEmit = bVal;
}
//-----------------------------------------------------------------------------
// Purpose:
// Output : SmokeTrail*
//-----------------------------------------------------------------------------
RocketTrail* RocketTrail::CreateRocketTrail()
{
CBaseEntity *pEnt = CreateEntityByName( "env_rockettrail" );
if( pEnt != NULL )
{
RocketTrail *pTrail = dynamic_cast<RocketTrail*>(pEnt);
if( pTrail != NULL )
{
pTrail->Activate();
return pTrail;
}
else
{
UTIL_Remove( pEnt );
}
}
return NULL;
}
//-----------------------------------------------------------------------------
// Purpose: Attach the smoke trail to an entity or point
// Input : index - entity that has the attachment
// attachment - point to attach to
//-----------------------------------------------------------------------------
void RocketTrail::FollowEntity( CBaseEntity *pEntity, const char *pAttachmentName )
{
// For attachments
if ( pAttachmentName && pEntity && pEntity->GetBaseAnimating() )
{
m_nAttachment = pEntity->GetBaseAnimating()->LookupAttachment( pAttachmentName );
}
else
{
m_nAttachment = 0;
}
BaseClass::FollowEntity( pEntity );
}
//==================================================
// SporeTrail
//==================================================
IMPLEMENT_SERVERCLASS_ST( SporeTrail, DT_SporeTrail )
SendPropFloat (SENDINFO(m_flSpawnRate), 8, 0, 1, 1024),
SendPropVector (SENDINFO(m_vecEndColor), 8, 0, 0, 1),
SendPropFloat (SENDINFO(m_flParticleLifetime), 16, SPROP_ROUNDUP, 0.1, 100),
SendPropFloat (SENDINFO(m_flStartSize), -1, SPROP_NOSCALE),
SendPropFloat (SENDINFO(m_flEndSize), -1, SPROP_NOSCALE),
SendPropFloat (SENDINFO(m_flSpawnRadius), -1, SPROP_NOSCALE),
SendPropBool (SENDINFO(m_bEmit)),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS(env_sporetrail, SporeTrail);
BEGIN_DATADESC( SporeTrail )
DEFINE_FIELD( m_vecEndColor, FIELD_VECTOR ),
DEFINE_FIELD( m_flSpawnRate, FIELD_FLOAT ),
DEFINE_FIELD( m_flParticleLifetime, FIELD_FLOAT ),
DEFINE_FIELD( m_flStartSize, FIELD_FLOAT ),
DEFINE_FIELD( m_flEndSize, FIELD_FLOAT ),
DEFINE_FIELD( m_flSpawnRadius, FIELD_FLOAT ),
DEFINE_FIELD( m_bEmit, FIELD_BOOLEAN ),
END_DATADESC()
SporeTrail::SporeTrail( void )
{
m_vecEndColor.GetForModify().Init();
m_flSpawnRate = 100.0f;
m_flParticleLifetime = 1.0f;
m_flStartSize = 1.0f;
m_flEndSize = 0.0f;
m_flSpawnRadius = 16.0f;
SetRenderColor( 255, 255, 255, 255 );
}
//-----------------------------------------------------------------------------
// Purpose:
// Output : SporeTrail*
//-----------------------------------------------------------------------------
SporeTrail* SporeTrail::CreateSporeTrail()
{
CBaseEntity *pEnt = CreateEntityByName( SPORETRAIL_ENTITYNAME );
if(pEnt)
{
SporeTrail *pSpore = dynamic_cast<SporeTrail*>(pEnt);
if ( pSpore )
{
pSpore->Activate();
return pSpore;
}
else
{
UTIL_Remove( pEnt );
}
}
return NULL;
}
//==================================================
// SporeExplosion
//==================================================
IMPLEMENT_SERVERCLASS_ST( SporeExplosion, DT_SporeExplosion )
SendPropFloat (SENDINFO(m_flSpawnRate), 8, 0, 1, 1024),
SendPropFloat (SENDINFO(m_flParticleLifetime), 16, SPROP_ROUNDUP, 0.1, 100),
SendPropFloat (SENDINFO(m_flStartSize), -1, SPROP_NOSCALE),
SendPropFloat (SENDINFO(m_flEndSize), -1, SPROP_NOSCALE),
SendPropFloat (SENDINFO(m_flSpawnRadius), -1, SPROP_NOSCALE),
SendPropBool (SENDINFO(m_bEmit) ),
SendPropBool (SENDINFO(m_bDontRemove) ),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS( env_sporeexplosion, SporeExplosion );
BEGIN_DATADESC( SporeExplosion )
DEFINE_KEYFIELD( m_flSpawnRate, FIELD_FLOAT, "spawnrate" ),
DEFINE_FIELD( m_flParticleLifetime, FIELD_FLOAT ),
DEFINE_FIELD( m_flStartSize, FIELD_FLOAT ),
DEFINE_FIELD( m_flEndSize, FIELD_FLOAT ),
DEFINE_FIELD( m_flSpawnRadius, FIELD_FLOAT ),
DEFINE_FIELD( m_bEmit, FIELD_BOOLEAN ),
DEFINE_KEYFIELD( m_bDisabled, FIELD_BOOLEAN, "startdisabled" ),
DEFINE_FIELD( m_bDontRemove, FIELD_BOOLEAN ),
DEFINE_INPUTFUNC( FIELD_VOID, "Disable", InputDisable ),
DEFINE_INPUTFUNC( FIELD_VOID, "Enable", InputEnable ),
END_DATADESC()
SporeExplosion::SporeExplosion( void )
{
m_flSpawnRate = 100.0f;
m_flParticleLifetime = 1.0f;
m_flStartSize = 1.0f;
m_flEndSize = 0.0f;
m_flSpawnRadius = 16.0f;
SetRenderColor( 255, 255, 255, 255 );
m_bEmit = true;
m_bDisabled = false;
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
void SporeExplosion::Spawn( void )
{
BaseClass::Spawn();
m_bEmit = false;
}
//-----------------------------------------------------------------------------
// Purpose:
// Output : SporeExplosion*
//-----------------------------------------------------------------------------
SporeExplosion *SporeExplosion::CreateSporeExplosion()
{
CBaseEntity *pEnt = CreateEntityByName( SPOREEXPLOSION_ENTITYNAME );
if ( pEnt )
{
SporeExplosion *pSpore = dynamic_cast<SporeExplosion*>(pEnt);
if ( pSpore )
{
pSpore->Activate();
return pSpore;
}
else
{
UTIL_Remove( pEnt );
}
}
return NULL;
}
void SporeExplosion::InputEnable( inputdata_t &inputdata )
{
m_bDontRemove = true;
m_bDisabled = false;
m_bEmit = true;
}
void SporeExplosion::InputDisable( inputdata_t &inputdata )
{
m_bDontRemove = true;
m_bDisabled = true;
m_bEmit = false;
}
BEGIN_DATADESC( CFireTrail )
DEFINE_FIELD( m_flLifetime, FIELD_FLOAT ),
DEFINE_FIELD( m_nAttachment, FIELD_INTEGER ),
END_DATADESC()
IMPLEMENT_SERVERCLASS_ST( CFireTrail, DT_FireTrail )
SendPropInt( SENDINFO( m_nAttachment ), 32 ),
SendPropFloat( SENDINFO( m_flLifetime ), 0, SPROP_NOSCALE ),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS( env_fire_trail, CFireTrail );
void CFireTrail::Precache( void )
{
PrecacheMaterial( "sprites/flamelet1" );
PrecacheMaterial( "sprites/flamelet2" );
PrecacheMaterial( "sprites/flamelet3" );
PrecacheMaterial( "sprites/flamelet4" );
PrecacheMaterial( "sprites/flamelet5" );
PrecacheMaterial( "particle/particle_smokegrenade" );
PrecacheMaterial( "particle/particle_noisesphere" );
}
//-----------------------------------------------------------------------------
// Purpose: Attach the smoke trail to an entity or point
// Input : index - entity that has the attachment
// attachment - point to attach to
//-----------------------------------------------------------------------------
void CFireTrail::FollowEntity( CBaseEntity *pEntity, const char *pAttachmentName )
{
// For attachments
if ( pAttachmentName && pEntity && pEntity->GetBaseAnimating() )
{
m_nAttachment = pEntity->GetBaseAnimating()->LookupAttachment( pAttachmentName );
}
else
{
m_nAttachment = 0;
}
BaseClass::FollowEntity( pEntity );
}
//-----------------------------------------------------------------------------
// Purpose: Create and return a new fire trail entity
//-----------------------------------------------------------------------------
CFireTrail *CFireTrail::CreateFireTrail( void )
{
CBaseEntity *pEnt = CreateEntityByName( "env_fire_trail" );
if ( pEnt )
{
CFireTrail *pTrail = dynamic_cast<CFireTrail*>(pEnt);
if ( pTrail )
{
pTrail->Activate();
return pTrail;
}
else
{
UTIL_Remove( pEnt );
}
}
return NULL;
}
//-----------------------------------------------------------------------------
//Data table
//-----------------------------------------------------------------------------
IMPLEMENT_SERVERCLASS_ST(DustTrail, DT_DustTrail)
SendPropFloat(SENDINFO(m_SpawnRate), 8, 0, 1, 1024),
SendPropVector(SENDINFO(m_Color), 8, 0, 0, 1),
SendPropFloat(SENDINFO(m_ParticleLifetime), 16, SPROP_ROUNDUP, 0.1, 100),
SendPropFloat(SENDINFO(m_StopEmitTime), 0, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MinSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MaxSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MinDirectedSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_MaxDirectedSpeed), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_StartSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_EndSize), -1, SPROP_NOSCALE),
SendPropFloat(SENDINFO(m_SpawnRadius), -1, SPROP_NOSCALE),
SendPropBool(SENDINFO(m_bEmit) ),
SendPropFloat(SENDINFO(m_Opacity), -1, SPROP_NOSCALE),
END_SEND_TABLE()
LINK_ENTITY_TO_CLASS( env_dusttrail, DustTrail);
BEGIN_DATADESC( DustTrail )
DEFINE_FIELD( m_Color, FIELD_VECTOR ),
DEFINE_KEYFIELD( m_Opacity, FIELD_FLOAT, "opacity" ),
DEFINE_KEYFIELD( m_SpawnRate, FIELD_FLOAT, "spawnrate" ),
DEFINE_KEYFIELD( m_ParticleLifetime, FIELD_FLOAT, "lifetime" ),
DEFINE_FIELD( m_StopEmitTime, FIELD_TIME ),
DEFINE_KEYFIELD( m_MinSpeed, FIELD_FLOAT, "minspeed" ),
DEFINE_KEYFIELD( m_MaxSpeed, FIELD_FLOAT, "maxspeed" ),
DEFINE_KEYFIELD( m_MinDirectedSpeed, FIELD_FLOAT, "mindirectedspeed" ),
DEFINE_KEYFIELD( m_MaxDirectedSpeed, FIELD_FLOAT, "maxdirectedspeed" ),
DEFINE_KEYFIELD( m_StartSize, FIELD_FLOAT, "startsize" ),
DEFINE_KEYFIELD( m_EndSize, FIELD_FLOAT, "endsize" ),
DEFINE_KEYFIELD( m_SpawnRadius, FIELD_FLOAT, "spawnradius" ),
DEFINE_FIELD( m_bEmit, FIELD_BOOLEAN ),
DEFINE_FIELD( m_nAttachment, FIELD_INTEGER ),
END_DATADESC()
//-----------------------------------------------------------------------------
// Purpose:
// Output :
//-----------------------------------------------------------------------------
DustTrail::DustTrail()
{
m_SpawnRate = 10;
m_Color.GetForModify().Init(0.5, 0.5, 0.5);
m_ParticleLifetime = 5;
m_StopEmitTime = 0; // Don't stop emitting particles
m_MinSpeed = 2;
m_MaxSpeed = 4;
m_MinDirectedSpeed = m_MaxDirectedSpeed = 0;
m_StartSize = 35;
m_EndSize = 55;
m_SpawnRadius = 2;
m_bEmit = true;
m_Opacity = 0.5f;
}
//-----------------------------------------------------------------------------
// Parse data from a map file
//-----------------------------------------------------------------------------
bool DustTrail::KeyValue( const char *szKeyName, const char *szValue )
{
if ( FStrEq( szKeyName, "color" ) )
{
color32 tmp;
UTIL_StringToColor32( &tmp, szValue );
m_Color.GetForModify().Init( tmp.r / 255.0f, tmp.g / 255.0f, tmp.b / 255.0f );
return true;
}
if ( FStrEq( szKeyName, "emittime" ) )
{
m_StopEmitTime = gpGlobals->curtime + atof( szValue );
return true;
}
return BaseClass::KeyValue( szKeyName, szValue );
}
//-----------------------------------------------------------------------------
// Purpose :
// Input :
// Output :
//-----------------------------------------------------------------------------
void DustTrail::SetEmit(bool bVal)
{
m_bEmit = bVal;
}
//-----------------------------------------------------------------------------
// Purpose:
// Output : DustTrail*
//-----------------------------------------------------------------------------
DustTrail* DustTrail::CreateDustTrail()
{
CBaseEntity *pEnt = CreateEntityByName(DUSTTRAIL_ENTITYNAME);
if(pEnt)
{
DustTrail *pDust = dynamic_cast<DustTrail*>(pEnt);
if(pDust)
{
pDust->Activate();
return pDust;
}
else
{
UTIL_Remove(pEnt);
}
}
return NULL;
}