/sp/src/game/client/c_baseentity.cpp

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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//===========================================================================//
#include "cbase.h"
#include "c_baseentity.h"
#include "prediction.h"
#include "model_types.h"
#include "iviewrender_beams.h"
#include "dlight.h"
#include "iviewrender.h"
#include "view.h"
#include "iefx.h"
#include "c_team.h"
#include "clientmode.h"
#include "usercmd.h"
#include "engine/IEngineSound.h"
#include "engine/IEngineTrace.h"
#include "engine/ivmodelinfo.h"
#include "tier0/vprof.h"
#include "fx_line.h"
#include "interface.h"
#include "materialsystem/imaterialsystem.h"
#include "soundinfo.h"
#include "mathlib/vmatrix.h"
#include "isaverestore.h"
#include "interval.h"
#include "engine/ivdebugoverlay.h"
#include "c_ai_basenpc.h"
#include "apparent_velocity_helper.h"
#include "c_baseanimatingoverlay.h"
#include "tier1/KeyValues.h"
#include "hltvcamera.h"
#include "datacache/imdlcache.h"
#include "toolframework/itoolframework.h"
#include "toolframework_client.h"
#include "decals.h"
#include "cdll_bounded_cvars.h"
#include "inetchannelinfo.h"
#include "proto_version.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"


#ifdef INTERPOLATEDVAR_PARANOID_MEASUREMENT
	int g_nInterpolatedVarsChanged = 0;
	bool g_bRestoreInterpolatedVarValues = false;
#endif


static bool g_bWasSkipping = (bool)-1;
static bool g_bWasThreaded =(bool)-1;
static int  g_nThreadModeTicks = 0;

void cc_cl_interp_all_changed( IConVar *pConVar, const char *pOldString, float flOldValue )
{
	ConVarRef var( pConVar );
	if ( var.GetInt() )
	{
		C_BaseEntityIterator iterator;
		C_BaseEntity *pEnt;
		while ( (pEnt = iterator.Next()) != NULL )	
		{
			if ( pEnt->ShouldInterpolate() )
			{
				pEnt->AddToInterpolationList();
			}
		}
	}
}


static ConVar  cl_extrapolate( "cl_extrapolate", "1", FCVAR_CHEAT, "Enable/disable extrapolation if interpolation history runs out." );
static ConVar  cl_interp_npcs( "cl_interp_npcs", "0.0", FCVAR_USERINFO, "Interpolate NPC positions starting this many seconds in past (or cl_interp, if greater)" );  
static ConVar  cl_interp_all( "cl_interp_all", "0", 0, "Disable interpolation list optimizations.", 0, 0, 0, 0, cc_cl_interp_all_changed );
ConVar  r_drawmodeldecals( "r_drawmodeldecals", "1" );
extern ConVar	cl_showerror;
int C_BaseEntity::m_nPredictionRandomSeed = -1;
C_BasePlayer *C_BaseEntity::m_pPredictionPlayer = NULL;
bool C_BaseEntity::s_bAbsQueriesValid = true;
bool C_BaseEntity::s_bAbsRecomputationEnabled = true;
bool C_BaseEntity::s_bInterpolate = true;

bool C_BaseEntity::sm_bDisableTouchFuncs = false;	// Disables PhysicsTouch and PhysicsStartTouch function calls

static ConVar  r_drawrenderboxes( "r_drawrenderboxes", "0", FCVAR_CHEAT );  

static bool g_bAbsRecomputationStack[8];
static unsigned short g_iAbsRecomputationStackPos = 0;

// All the entities that want Interpolate() called on them.
static CUtlLinkedList<C_BaseEntity*, unsigned short> g_InterpolationList;
static CUtlLinkedList<C_BaseEntity*, unsigned short> g_TeleportList;

#if !defined( NO_ENTITY_PREDICTION )
//-----------------------------------------------------------------------------
// Purpose: Maintains a list of predicted or client created entities
//-----------------------------------------------------------------------------
class CPredictableList : public IPredictableList
{
public:
	virtual C_BaseEntity *GetPredictable( int slot );
	virtual int GetPredictableCount( void );

protected:
	void	AddToPredictableList( ClientEntityHandle_t add );
	void	RemoveFromPredictablesList( ClientEntityHandle_t remove );

private:
	CUtlVector< ClientEntityHandle_t >	m_Predictables;

	friend class C_BaseEntity;
};

// Create singleton
static CPredictableList g_Predictables;
IPredictableList *predictables = &g_Predictables;

//-----------------------------------------------------------------------------
// Purpose: Add entity to list
// Input  : add - 
// Output : int
//-----------------------------------------------------------------------------
void CPredictableList::AddToPredictableList( ClientEntityHandle_t add )
{
	// This is a hack to remap slot to index
	if ( m_Predictables.Find( add ) != m_Predictables.InvalidIndex() )
	{
		return;
	}

	// Add to general list
	m_Predictables.AddToTail( add );

	// Maintain sort order by entindex
	int count = m_Predictables.Size();
	if ( count < 2 )
		return;

	int i, j;
	for ( i = 0; i < count; i++ )
	{
		for ( j = i + 1; j < count; j++ )
		{
			ClientEntityHandle_t h1 = m_Predictables[ i ];
			ClientEntityHandle_t h2 = m_Predictables[ j ];

			C_BaseEntity *p1 = cl_entitylist->GetBaseEntityFromHandle( h1 );
			C_BaseEntity *p2 = cl_entitylist->GetBaseEntityFromHandle( h2 );

			if ( !p1 || !p2 )
			{
				Assert( 0 );
				continue;
			}

			if ( p1->entindex() != -1 && 
				 p2->entindex() != -1 )
			{
				if ( p1->entindex() < p2->entindex() )
					continue;
			}

			if ( p2->entindex() == -1 )
				continue;

			m_Predictables[ i ] = h2;
			m_Predictables[ j ] = h1;
		}
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : remove - 
//-----------------------------------------------------------------------------
void CPredictableList::RemoveFromPredictablesList( ClientEntityHandle_t remove )
{
	m_Predictables.FindAndRemove( remove );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : slot - 
// Output : C_BaseEntity
//-----------------------------------------------------------------------------
C_BaseEntity *CPredictableList::GetPredictable( int slot )
{
	return cl_entitylist->GetBaseEntityFromHandle( m_Predictables[ slot ] );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Output : int
//-----------------------------------------------------------------------------
int CPredictableList::GetPredictableCount( void )
{
	return m_Predictables.Count();
}

//-----------------------------------------------------------------------------
// Purpose: Searc predictables for previously created entity (by testId)
// Input  : testId - 
// Output : static C_BaseEntity
//-----------------------------------------------------------------------------
static C_BaseEntity *FindPreviouslyCreatedEntity( CPredictableId& testId )
{
	int c = predictables->GetPredictableCount();

	int i;
	for ( i = 0; i < c; i++ )
	{
		C_BaseEntity *e = predictables->GetPredictable( i );
		if ( !e || !e->IsClientCreated() )
			continue;

		// Found it, note use of operator ==
		if ( testId == e->m_PredictableID )
		{
			return e;
		}
	}

	return NULL;
}
#endif

abstract_class IRecordingList
{
public:
	virtual ~IRecordingList() {};
	virtual void	AddToList( ClientEntityHandle_t add ) = 0;
	virtual void	RemoveFromList( ClientEntityHandle_t remove ) = 0;

	virtual int		Count() = 0;
	virtual IClientRenderable *Get( int index ) = 0;
};

class CRecordingList : public IRecordingList
{
public:
	virtual void	AddToList( ClientEntityHandle_t add );
	virtual void	RemoveFromList( ClientEntityHandle_t remove );

	virtual int		Count();
	IClientRenderable *Get( int index );
private:
	CUtlVector< ClientEntityHandle_t > m_Recording;
};

static CRecordingList g_RecordingList;
IRecordingList *recordinglist = &g_RecordingList;

//-----------------------------------------------------------------------------
// Purpose: Add entity to list
// Input  : add - 
// Output : int
//-----------------------------------------------------------------------------
void CRecordingList::AddToList( ClientEntityHandle_t add )
{
	// This is a hack to remap slot to index
	if ( m_Recording.Find( add ) != m_Recording.InvalidIndex() )
	{
		return;
	}

	// Add to general list
	m_Recording.AddToTail( add );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : remove - 
//-----------------------------------------------------------------------------
void CRecordingList::RemoveFromList( ClientEntityHandle_t remove )
{
	m_Recording.FindAndRemove( remove );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : slot - 
// Output : IClientRenderable
//-----------------------------------------------------------------------------
IClientRenderable *CRecordingList::Get( int index )
{
	return cl_entitylist->GetClientRenderableFromHandle( m_Recording[ index ] );
}

//-----------------------------------------------------------------------------
// Purpose: 
// Output : int
//-----------------------------------------------------------------------------
int CRecordingList::Count()
{
	return m_Recording.Count();
}

// Should these be somewhere else?
#define PITCH 0

//-----------------------------------------------------------------------------
// Purpose: Decodes animtime and notes when it changes
// Input  : *pStruct - ( C_BaseEntity * ) used to flag animtime is changine
//			*pVarData - 
//			*pIn - 
//			objectID - 
//-----------------------------------------------------------------------------
void RecvProxy_AnimTime( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	C_BaseEntity *pEntity = ( C_BaseEntity * )pStruct;
	Assert( pOut == &pEntity->m_flAnimTime );

	int t;
	int tickbase;
	int addt;

	// Unpack the data.
	addt	= pData->m_Value.m_Int;

	// Note, this needs to be encoded relative to packet timestamp, not raw client clock
	tickbase = gpGlobals->GetNetworkBase( gpGlobals->tickcount, pEntity->entindex() );

	t = tickbase;
											//  and then go back to floating point time.
	t += addt;				// Add in an additional up to 256 100ths from the server

	// center m_flAnimTime around current time.
	while (t < gpGlobals->tickcount - 127)
		t += 256;
	while (t > gpGlobals->tickcount + 127)
		t -= 256;
	
	pEntity->m_flAnimTime = ( t * TICK_INTERVAL );
}

void RecvProxy_SimulationTime( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	C_BaseEntity *pEntity = ( C_BaseEntity * )pStruct;
	Assert( pOut == &pEntity->m_flSimulationTime );

	int t;
	int tickbase;
	int addt;

	// Unpack the data.
	addt	= pData->m_Value.m_Int;

	// Note, this needs to be encoded relative to packet timestamp, not raw client clock
	tickbase = gpGlobals->GetNetworkBase( gpGlobals->tickcount, pEntity->entindex() );

	t = tickbase;
											//  and then go back to floating point time.
	t += addt;				// Add in an additional up to 256 100ths from the server

	// center m_flSimulationTime around current time.
	while (t < gpGlobals->tickcount - 127)
		t += 256;
	while (t > gpGlobals->tickcount + 127)
		t -= 256;
	
	pEntity->m_flSimulationTime = ( t * TICK_INTERVAL );
}

void RecvProxy_LocalVelocity( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	CBaseEntity *pEnt = (CBaseEntity *)pStruct;

	Vector vecVelocity;
	
	vecVelocity.x = pData->m_Value.m_Vector[0];
	vecVelocity.y = pData->m_Value.m_Vector[1];
	vecVelocity.z = pData->m_Value.m_Vector[2];

	// SetLocalVelocity checks to see if the value has changed
	pEnt->SetLocalVelocity( vecVelocity );
}
void RecvProxy_ToolRecording( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	if ( !ToolsEnabled() )
		return;

	CBaseEntity *pEnt = (CBaseEntity *)pStruct;
	pEnt->SetToolRecording( pData->m_Value.m_Int != 0 );
}

// Expose it to the engine.
IMPLEMENT_CLIENTCLASS(C_BaseEntity, DT_BaseEntity, CBaseEntity);

static void RecvProxy_MoveType( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	((C_BaseEntity*)pStruct)->SetMoveType( (MoveType_t)(pData->m_Value.m_Int) );
}

static void RecvProxy_MoveCollide( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	((C_BaseEntity*)pStruct)->SetMoveCollide( (MoveCollide_t)(pData->m_Value.m_Int) );
}

static void RecvProxy_Solid( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	((C_BaseEntity*)pStruct)->SetSolid( (SolidType_t)pData->m_Value.m_Int );
}

static void RecvProxy_SolidFlags( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	((C_BaseEntity*)pStruct)->SetSolidFlags( pData->m_Value.m_Int );
}

void RecvProxy_EffectFlags( const CRecvProxyData *pData, void *pStruct, void *pOut )
{
	((C_BaseEntity*)pStruct)->SetEffects( pData->m_Value.m_Int );
}


BEGIN_RECV_TABLE_NOBASE( C_BaseEntity, DT_AnimTimeMustBeFirst )
	RecvPropInt( RECVINFO(m_flAnimTime), 0, RecvProxy_AnimTime ),
END_RECV_TABLE()


#ifndef NO_ENTITY_PREDICTION
BEGIN_RECV_TABLE_NOBASE( C_BaseEntity, DT_PredictableId )
	RecvPropPredictableId( RECVINFO( m_PredictableID ) ),
	RecvPropInt( RECVINFO( m_bIsPlayerSimulated ) ),
END_RECV_TABLE()
#endif


BEGIN_RECV_TABLE_NOBASE(C_BaseEntity, DT_BaseEntity)
	RecvPropDataTable( "AnimTimeMustBeFirst", 0, 0, &REFERENCE_RECV_TABLE(DT_AnimTimeMustBeFirst) ),
	RecvPropInt( RECVINFO(m_flSimulationTime), 0, RecvProxy_SimulationTime ),
	RecvPropInt( RECVINFO( m_ubInterpolationFrame ) ),

	RecvPropVector( RECVINFO_NAME( m_vecNetworkOrigin, m_vecOrigin ) ),
#if PREDICTION_ERROR_CHECK_LEVEL > 1 
	RecvPropVector( RECVINFO_NAME( m_angNetworkAngles, m_angRotation ) ),
#else
	RecvPropQAngles( RECVINFO_NAME( m_angNetworkAngles, m_angRotation ) ),
#endif

#ifdef DEMO_BACKWARDCOMPATABILITY
	RecvPropInt( RECVINFO(m_nModelIndex), 0, RecvProxy_IntToModelIndex16_BackCompatible ),
#else
	RecvPropInt( RECVINFO(m_nModelIndex) ),
#endif

	RecvPropInt(RECVINFO(m_fEffects), 0, RecvProxy_EffectFlags ),
	RecvPropInt(RECVINFO(m_nRenderMode)),
	RecvPropInt(RECVINFO(m_nRenderFX)),
	RecvPropInt(RECVINFO(m_clrRender)),
	RecvPropInt(RECVINFO(m_iTeamNum)),
	RecvPropInt(RECVINFO(m_CollisionGroup)),
	RecvPropFloat(RECVINFO(m_flElasticity)),
	RecvPropFloat(RECVINFO(m_flShadowCastDistance)),
	RecvPropEHandle( RECVINFO(m_hOwnerEntity) ),
	RecvPropEHandle( RECVINFO(m_hEffectEntity) ),
	RecvPropInt( RECVINFO_NAME(m_hNetworkMoveParent, moveparent), 0, RecvProxy_IntToMoveParent ),
	RecvPropInt( RECVINFO( m_iParentAttachment ) ),

	RecvPropInt( "movetype", 0, SIZEOF_IGNORE, 0, RecvProxy_MoveType ),
	RecvPropInt( "movecollide", 0, SIZEOF_IGNORE, 0, RecvProxy_MoveCollide ),
	RecvPropDataTable( RECVINFO_DT( m_Collision ), 0, &REFERENCE_RECV_TABLE(DT_CollisionProperty) ),
	
	RecvPropInt( RECVINFO ( m_iTextureFrameIndex ) ),
#if !defined( NO_ENTITY_PREDICTION )
	RecvPropDataTable( "predictable_id", 0, 0, &REFERENCE_RECV_TABLE( DT_PredictableId ) ),
#endif

	RecvPropInt		( RECVINFO( m_bSimulatedEveryTick ), 0, RecvProxy_InterpolationAmountChanged ),
	RecvPropInt		( RECVINFO( m_bAnimatedEveryTick ), 0, RecvProxy_InterpolationAmountChanged ),
	RecvPropBool	( RECVINFO( m_bAlternateSorting ) ),

#ifdef TF_CLIENT_DLL
	RecvPropArray3( RECVINFO_ARRAY(m_nModelIndexOverrides),	RecvPropInt( RECVINFO(m_nModelIndexOverrides[0]) ) ),
#endif

END_RECV_TABLE()

const float coordTolerance = 2.0f / (float)( 1 << COORD_FRACTIONAL_BITS );

BEGIN_PREDICTION_DATA_NO_BASE( C_BaseEntity )

	// These have a special proxy to handle send/receive
	DEFINE_PRED_TYPEDESCRIPTION( m_Collision, CCollisionProperty ),

	DEFINE_PRED_FIELD( m_MoveType, FIELD_CHARACTER, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_MoveCollide, FIELD_CHARACTER, FTYPEDESC_INSENDTABLE ),

	DEFINE_FIELD( m_vecAbsVelocity, FIELD_VECTOR ),
	DEFINE_PRED_FIELD_TOL( m_vecVelocity, FIELD_VECTOR, FTYPEDESC_INSENDTABLE, 0.5f ),
//	DEFINE_PRED_FIELD( m_fEffects, FIELD_INTEGER, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_nRenderMode, FIELD_CHARACTER, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_nRenderFX, FIELD_CHARACTER, FTYPEDESC_INSENDTABLE ),
//	DEFINE_PRED_FIELD( m_flAnimTime, FIELD_FLOAT, FTYPEDESC_INSENDTABLE ),
//	DEFINE_PRED_FIELD( m_flSimulationTime, FIELD_FLOAT, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_fFlags, FIELD_INTEGER, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD_TOL( m_vecViewOffset, FIELD_VECTOR, FTYPEDESC_INSENDTABLE, 0.25f ),
	DEFINE_PRED_FIELD( m_nModelIndex, FIELD_SHORT, FTYPEDESC_INSENDTABLE | FTYPEDESC_MODELINDEX ),
	DEFINE_PRED_FIELD( m_flFriction, FIELD_FLOAT, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_iTeamNum, FIELD_INTEGER, FTYPEDESC_INSENDTABLE ),
	DEFINE_PRED_FIELD( m_hOwnerEntity, FIELD_EHANDLE, FTYPEDESC_INSENDTABLE ),

//	DEFINE_FIELD( m_nSimulationTick, FIELD_INTEGER ),

	DEFINE_PRED_FIELD( m_hNetworkMoveParent, FIELD_EHANDLE, FTYPEDESC_INSENDTABLE ),
//	DEFINE_PRED_FIELD( m_pMoveParent, FIELD_EHANDLE ),
//	DEFINE_PRED_FIELD( m_pMoveChild, FIELD_EHANDLE ),
//	DEFINE_PRED_FIELD( m_pMovePeer, FIELD_EHANDLE ),
//	DEFINE_PRED_FIELD( m_pMovePrevPeer, FIELD_EHANDLE ),

	DEFINE_PRED_FIELD_TOL( m_vecNetworkOrigin, FIELD_VECTOR, FTYPEDESC_INSENDTABLE, coordTolerance ),
	DEFINE_PRED_FIELD( m_angNetworkAngles, FIELD_VECTOR, FTYPEDESC_INSENDTABLE | FTYPEDESC_NOERRORCHECK ),
	DEFINE_FIELD( m_vecAbsOrigin, FIELD_VECTOR ),
	DEFINE_FIELD( m_angAbsRotation, FIELD_VECTOR ),
	DEFINE_FIELD( m_vecOrigin, FIELD_VECTOR ),
	DEFINE_FIELD( m_angRotation, FIELD_VECTOR ),

//	DEFINE_FIELD( m_hGroundEntity, FIELD_EHANDLE ),
	DEFINE_FIELD( m_nWaterLevel, FIELD_CHARACTER ),
	DEFINE_FIELD( m_nWaterType, FIELD_CHARACTER ),
	DEFINE_FIELD( m_vecAngVelocity, FIELD_VECTOR ),
//	DEFINE_FIELD( m_vecAbsAngVelocity, FIELD_VECTOR ),


//	DEFINE_FIELD( model, FIELD_INTEGER ), // writing pointer literally
//	DEFINE_FIELD( index, FIELD_INTEGER ),
//	DEFINE_FIELD( m_ClientHandle, FIELD_SHORT ),
//	DEFINE_FIELD( m_Partition, FIELD_SHORT ),
//	DEFINE_FIELD( m_hRender, FIELD_SHORT ),
	DEFINE_FIELD( m_bDormant, FIELD_BOOLEAN ),
//	DEFINE_FIELD( current_position, FIELD_INTEGER ),
//	DEFINE_FIELD( m_flLastMessageTime, FIELD_FLOAT ),
	DEFINE_FIELD( m_vecBaseVelocity, FIELD_VECTOR ),
	DEFINE_FIELD( m_iEFlags, FIELD_INTEGER ),
	DEFINE_FIELD( m_flGravity, FIELD_FLOAT ),
//	DEFINE_FIELD( m_ModelInstance, FIELD_SHORT ),
	DEFINE_FIELD( m_flProxyRandomValue, FIELD_FLOAT ),

//	DEFINE_FIELD( m_PredictableID, FIELD_INTEGER ),
//	DEFINE_FIELD( m_pPredictionContext, FIELD_POINTER ),
	// Stuff specific to rendering and therefore not to be copied back and forth
	// DEFINE_PRED_FIELD( m_clrRender, color32, FTYPEDESC_INSENDTABLE  ),
	// DEFINE_FIELD( m_bReadyToDraw, FIELD_BOOLEAN ),
	// DEFINE_FIELD( anim, CLatchedAnim ),
	// DEFINE_FIELD( mouth, CMouthInfo ),
	// DEFINE_FIELD( GetAbsOrigin(), FIELD_VECTOR ),
	// DEFINE_FIELD( GetAbsAngles(), FIELD_VECTOR ),
	// DEFINE_FIELD( m_nNumAttachments, FIELD_SHORT ),
	// DEFINE_FIELD( m_pAttachmentAngles, FIELD_VECTOR ),
	// DEFINE_FIELD( m_pAttachmentOrigin, FIELD_VECTOR ),
	// DEFINE_FIELD( m_listentry, CSerialEntity ),
	// DEFINE_FIELD( m_ShadowHandle, ClientShadowHandle_t ),
	// DEFINE_FIELD( m_hThink, ClientThinkHandle_t ),
	// Definitely private and not copied around
	// DEFINE_FIELD( m_bPredictable, FIELD_BOOLEAN ),
	// DEFINE_FIELD( m_CollisionGroup, FIELD_INTEGER ),
	// DEFINE_FIELD( m_DataChangeEventRef, FIELD_INTEGER ),
#if !defined( CLIENT_DLL )
	// DEFINE_FIELD( m_bPredictionEligible, FIELD_BOOLEAN ),
#endif
END_PREDICTION_DATA()

//-----------------------------------------------------------------------------
// Helper functions.
//-----------------------------------------------------------------------------

void SpewInterpolatedVar( CInterpolatedVar< Vector > *pVar )
{
	Msg( "--------------------------------------------------\n" );
	int i = pVar->GetHead();
	CApparentVelocity<Vector> apparent;
	float prevtime = 0.0f;
	while ( 1 )
	{
		float changetime;
		Vector *pVal = pVar->GetHistoryValue( i, changetime );
		if ( !pVal )
			break;

		float vel = apparent.AddSample( changetime, *pVal );
		Msg( "%6.6f: (%.2f %.2f %.2f), vel: %.2f [dt %.1f]\n", changetime, VectorExpand( *pVal ), vel, prevtime == 0.0f ? 0.0f : 1000.0f * ( changetime - prevtime ) );
		i = pVar->GetNext( i );
		prevtime = changetime;
	}
	Msg( "--------------------------------------------------\n" );
}

void SpewInterpolatedVar( CInterpolatedVar< Vector > *pVar, float flNow, float flInterpAmount, bool bSpewAllEntries = true )
{
	float target = flNow - flInterpAmount;

	Msg( "--------------------------------------------------\n" );
	int i = pVar->GetHead();
	CApparentVelocity<Vector> apparent;
	float newtime = 999999.0f;
	Vector newVec( 0, 0, 0 );
	bool bSpew = true;

	while ( 1 )
	{
		float changetime;
		Vector *pVal = pVar->GetHistoryValue( i, changetime );
		if ( !pVal )
			break;

		if ( bSpew && target >= changetime )
		{
			Vector o;
			pVar->DebugInterpolate( &o, flNow );
			bool bInterp = newtime != 999999.0f;
			float frac = 0.0f;
			char desc[ 32 ];

			if ( bInterp )
			{
				frac = ( target - changetime ) / ( newtime - changetime );
				Q_snprintf( desc, sizeof( desc ), "interpolated [%.2f]", frac );
			}
			else
			{
				bSpew = true;
				int savei = i;
				i = pVar->GetNext( i );
				float oldtertime = 0.0f;
				pVar->GetHistoryValue( i, oldtertime );

				if ( changetime != oldtertime )
				{
					frac = ( target - changetime ) / ( changetime - oldtertime );
				}

				Q_snprintf( desc, sizeof( desc ), "extrapolated [%.2f]", frac );
				i = savei;
			}

			if ( bSpew )
			{
				Msg( "  > %6.6f: (%.2f %.2f %.2f) %s for %.1f msec\n", 
					target, 
					VectorExpand( o ), 
					desc,
					1000.0f * ( target - changetime ) );
				bSpew = false;
			}
		}

		float vel = apparent.AddSample( changetime, *pVal );
		if ( bSpewAllEntries )
		{
			Msg( "    %6.6f: (%.2f %.2f %.2f), vel: %.2f [dt %.1f]\n", changetime, VectorExpand( *pVal ), vel, newtime == 999999.0f ? 0.0f : 1000.0f * ( newtime - changetime ) );
		}
		i = pVar->GetNext( i );
		newtime = changetime;
		newVec = *pVal;
	}
	Msg( "--------------------------------------------------\n" );
}
void SpewInterpolatedVar( CInterpolatedVar< float > *pVar )
{
	Msg( "--------------------------------------------------\n" );
	int i = pVar->GetHead();
	CApparentVelocity<float> apparent;
	while ( 1 )
	{
		float changetime;
		float *pVal = pVar->GetHistoryValue( i, changetime );
		if ( !pVal )
			break;

		float vel = apparent.AddSample( changetime, *pVal );
		Msg( "%6.6f: (%.2f), vel: %.2f\n", changetime, *pVal, vel );
		i = pVar->GetNext( i );
	}
	Msg( "--------------------------------------------------\n" );
}

template<class T>
void GetInterpolatedVarTimeRange( CInterpolatedVar<T> *pVar, float &flMin, float &flMax )
{
	flMin = 1e23;
	flMax = -1e23;

	int i = pVar->GetHead();
	CApparentVelocity<Vector> apparent;
	while ( 1 )
	{
		float changetime;
		if ( !pVar->GetHistoryValue( i, changetime ) )
			return;

		flMin = MIN( flMin, changetime );
		flMax = MAX( flMax, changetime );
		i = pVar->GetNext( i );
	}
}


//-----------------------------------------------------------------------------
// Global methods related to when abs data is correct
//-----------------------------------------------------------------------------
void C_BaseEntity::SetAbsQueriesValid( bool bValid )
{
	// @MULTICORE: Always allow in worker threads, assume higher level code is handling correctly
	if ( !ThreadInMainThread() )
		return;

	if ( !bValid )
	{
		s_bAbsQueriesValid = false;
	}
	else
	{
		s_bAbsQueriesValid = true;
	}
}

bool C_BaseEntity::IsAbsQueriesValid( void )
{
	if ( !ThreadInMainThread() )
		return true;
	return s_bAbsQueriesValid;
}

void C_BaseEntity::PushEnableAbsRecomputations( bool bEnable )
{
	if ( !ThreadInMainThread() )
		return;
	if ( g_iAbsRecomputationStackPos < ARRAYSIZE( g_bAbsRecomputationStack ) )
	{
		g_bAbsRecomputationStack[g_iAbsRecomputationStackPos] = s_bAbsRecomputationEnabled;
		++g_iAbsRecomputationStackPos;
		s_bAbsRecomputationEnabled = bEnable;
	}
	else
	{
		Assert( false );
	}
}

void C_BaseEntity::PopEnableAbsRecomputations()
{
	if ( !ThreadInMainThread() )
		return;
	if ( g_iAbsRecomputationStackPos > 0 )
	{
		--g_iAbsRecomputationStackPos;
		s_bAbsRecomputationEnabled = g_bAbsRecomputationStack[g_iAbsRecomputationStackPos];
	}
	else
	{
		Assert( false );
	}
}

void C_BaseEntity::EnableAbsRecomputations( bool bEnable )
{
	if ( !ThreadInMainThread() )
		return;
	// This should only be called at the frame level. Use PushEnableAbsRecomputations
	// if you're blocking out a section of code.
	Assert( g_iAbsRecomputationStackPos == 0 );

	s_bAbsRecomputationEnabled = bEnable;
}

bool C_BaseEntity::IsAbsRecomputationsEnabled()
{
	if ( !ThreadInMainThread() )
		return true;
	return s_bAbsRecomputationEnabled;
}

int	C_BaseEntity::GetTextureFrameIndex( void )
{
	return m_iTextureFrameIndex;
}

void C_BaseEntity::SetTextureFrameIndex( int iIndex )
{
	m_iTextureFrameIndex = iIndex;
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *map - 
//-----------------------------------------------------------------------------
void C_BaseEntity::Interp_SetupMappings( VarMapping_t *map )
{
	if( !map )
		return;

	int c = map->m_Entries.Count();
	for ( int i = 0; i < c; i++ )
	{
		VarMapEntry_t *e = &map->m_Entries[ i ];
		IInterpolatedVar *watcher = e->watcher;
		void *data = e->data;
		int type = e->type;

		watcher->Setup( data, type );
		watcher->SetInterpolationAmount( GetInterpolationAmount( watcher->GetType() ) ); 
	}
}

void C_BaseEntity::Interp_RestoreToLastNetworked( VarMapping_t *map )
{
	VPROF( "C_BaseEntity::Interp_RestoreToLastNetworked" );

	PREDICTION_TRACKVALUECHANGESCOPE_ENTITY( this, "restoretolastnetworked" );

	Vector oldOrigin = GetLocalOrigin();
	QAngle oldAngles = GetLocalAngles();
	Vector oldVel = GetLocalVelocity();

	int c = map->m_Entries.Count();
	for ( int i = 0; i < c; i++ )
	{
		VarMapEntry_t *e = &map->m_Entries[ i ];
		IInterpolatedVar *watcher = e->watcher;
		watcher->RestoreToLastNetworked();
	}

	BaseInterpolatePart2( oldOrigin, oldAngles, oldVel, 0 );
}

void C_BaseEntity::Interp_UpdateInterpolationAmounts( VarMapping_t *map )
{
	if( !map )
		return;

	int c = map->m_Entries.Count();
	for ( int i = 0; i < c; i++ )
	{
		VarMapEntry_t *e = &map->m_Entries[ i ];
		IInterpolatedVar *watcher = e->watcher;
		watcher->SetInterpolationAmount( GetInterpolationAmount( watcher->GetType() ) ); 
	}
}

void C_BaseEntity::Interp_HierarchyUpdateInterpolationAmounts()
{
	Interp_UpdateInterpolationAmounts( GetVarMapping() );

	for ( C_BaseEntity *pChild = FirstMoveChild(); pChild; pChild = pChild->NextMovePeer() )
	{
		pChild->Interp_HierarchyUpdateInterpolationAmounts();
	}
}

inline int C_BaseEntity::Interp_Interpolate( VarMapping_t *map, float currentTime )
{
	int bNoMoreChanges = 1;
	if ( currentTime < map->m_lastInterpolationTime )
	{
		for ( int i = 0; i < map->m_nInterpolatedEntries; i++ )
		{
			VarMapEntry_t *e = &map->m_Entries[ i ];

			e->m_bNeedsToInterpolate = true;
		}
	}
	map->m_lastInterpolationTime = currentTime;

	for ( int i = 0; i < map->m_nInterpolatedEntries; i++ )
	{
		VarMapEntry_t *e = &map->m_Entries[ i ];

		if ( !e->m_bNeedsToInterpolate )
			continue;
			
		IInterpolatedVar *watcher = e->watcher;
		Assert( !( watcher->GetType() & EXCLUDE_AUTO_INTERPOLATE ) );


		if ( watcher->Interpolate( currentTime ) )
			e->m_bNeedsToInterpolate = false;
		else
			bNoMoreChanges = 0;
	}

	return bNoMoreChanges;
}

//-----------------------------------------------------------------------------
// Functions.
//-----------------------------------------------------------------------------
C_BaseEntity::C_BaseEntity() : 
	m_iv_vecOrigin( "C_BaseEntity::m_iv_vecOrigin" ),
	m_iv_angRotation( "C_BaseEntity::m_iv_angRotation" ),
	m_iv_vecVelocity( "C_BaseEntity::m_iv_vecVelocity" )
{
	AddVar( &m_vecOrigin, &m_iv_vecOrigin, LATCH_SIMULATION_VAR );
	AddVar( &m_angRotation, &m_iv_angRotation, LATCH_SIMULATION_VAR );
	// Removing this until we figure out why velocity introduces view hitching.
	// One possible fix is removing the player->ResetLatched() call in CGameMovement::FinishDuck(), 
	// but that re-introduces a third-person hitching bug.  One possible cause is the abrupt change
	// in player size/position that occurs when ducking, and how prediction tries to work through that.
	//
	// AddVar( &m_vecVelocity, &m_iv_vecVelocity, LATCH_SIMULATION_VAR );

	m_DataChangeEventRef = -1;
	m_EntClientFlags = 0;

	m_iParentAttachment = 0;
	m_nRenderFXBlend = 255;

	SetPredictionEligible( false );
	m_bPredictable = false;

	m_bSimulatedEveryTick = false;
	m_bAnimatedEveryTick = false;
	m_pPhysicsObject = NULL;

#ifdef _DEBUG
	m_vecAbsOrigin = vec3_origin;
	m_angAbsRotation = vec3_angle;
	m_vecNetworkOrigin.Init();
	m_angNetworkAngles.Init();
	m_vecAbsOrigin.Init();
//	m_vecAbsAngVelocity.Init();
	m_vecVelocity.Init();
	m_vecAbsVelocity.Init();
	m_vecViewOffset.Init();
	m_vecBaseVelocity.Init();

	m_iCurrentThinkContext = NO_THINK_CONTEXT;

#endif

	m_nSimulationTick = -1;

	// Assume drawing everything
	m_bReadyToDraw = true;
	m_flProxyRandomValue = 0.0f;

	m_fBBoxVisFlags = 0;
#if !defined( NO_ENTITY_PREDICTION )
	m_pPredictionContext = NULL;
#endif
	
	//NOTE: not virtual! we are in the constructor!
	C_BaseEntity::Clear();
	
	m_InterpolationListEntry = 0xFFFF;
	m_TeleportListEntry = 0xFFFF;

#ifndef NO_TOOLFRAMEWORK
	m_bEnabledInToolView = true;
	m_bToolRecording = false;
	m_ToolHandle = 0;
	m_nLastRecordedFrame = -1;
	m_bRecordInTools = true;
#endif

#ifdef TF_CLIENT_DLL
	m_bValidatedOwner = false;
	m_bDeemedInvalid = false;
	m_bWasDeemedInvalid = false;
#endif

	ParticleProp()->Init( this );
}


//-----------------------------------------------------------------------------
// Purpose: 
// Input  : 
// Output : 
//-----------------------------------------------------------------------------
C_BaseEntity::~C_BaseEntity()
{
	Term();
	ClearDataChangedEvent( m_DataChangeEventRef );
#if !defined( NO_ENTITY_PREDICTION )
	delete m_pPredictionContext;
#endif
	RemoveFromInterpolationList();
	RemoveFromTeleportList();
}

void C_BaseEntity::Clear( void )
{
	m_bDormant = true;

	m_nCreationTick = -1;
	m_RefEHandle.Term();
	m_ModelInstance = MODEL_INSTANCE_INVALID;
	m_ShadowHandle = CLIENTSHADOW_INVALID_HANDLE;
	m_hRender = INVALID_CLIENT_RENDER_HANDLE;
	m_hThink = INVALID_THINK_HANDLE;
	m_AimEntsListHandle = INVALID_AIMENTS_LIST_HANDLE;

	index = -1;
	m_Collision.Init( this );
	SetLocalOrigin( vec3_origin );
	SetLocalAngles( vec3_angle );
	model = NULL;
	m_vecAbsOrigin.Init();
	m_angAbsRotation.Init();
	m_vecVelocity.Init();
	ClearFlags();
	m_vecViewOffset.Init();
	m_vecBaseVelocity.Init();
	m_nModelIndex = 0;
	m_flAnimTime = 0;
	m_flSimulationTime = 0;
	SetSolid( SOLID_NONE );
	SetSolidFlags( 0 );
	SetMoveCollide( MOVECOLLIDE_DEFAULT );
	SetMoveType( MOVETYPE_NONE );

	ClearEffects();
	m_iEFlags = 0;
	m_nRenderMode = 0;
	m_nOldRenderMode = 0;
	SetRenderColor( 255, 255, 255, 255 );
	m_nRenderFX = 0;
	m_flFriction = 0.0f;       
	m_flGravity = 0.0f;
	SetCheckUntouch( false );
	m_ShadowDirUseOtherEntity = NULL;

	m_nLastThinkTick = gpGlobals->tickcount;

#if defined(SIXENSE)
	m_vecEyeOffset.Init();
	m_EyeAngleOffset.Init();
#endif

	// Remove prediction context if it exists
#if !defined( NO_ENTITY_PREDICTION )
	delete m_pPredictionContext;
	m_pPredictionContext = NULL;
#endif
	// Do not enable this on all entities. It forces bone setup for entities that
	// don't need it.
	//AddEFlags( EFL_USE_PARTITION_WHEN_NOT_SOLID );

	UpdateVisibility();
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::Spawn( void )
{
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::Activate()
{
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::SpawnClientEntity( void )
{
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::Precache( void )
{
}

//-----------------------------------------------------------------------------
// Purpose: Attach to entity
// Input  : *pEnt - 
// Output : Returns true on success, false on failure.
//-----------------------------------------------------------------------------
bool C_BaseEntity::Init( int entnum, int iSerialNum )
{
	Assert( entnum >= 0 && entnum < NUM_ENT_ENTRIES );

	index = entnum;

	cl_entitylist->AddNetworkableEntity( GetIClientUnknown(), entnum, iSerialNum );

	CollisionProp()->CreatePartitionHandle();

	Interp_SetupMappings( GetVarMapping() );

	m_nCreationTick = gpGlobals->tickcount;

	return true;
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
bool C_BaseEntity::InitializeAsClientEntity( const char *pszModelName, RenderGroup_t renderGroup )
{
	int nModelIndex;

	if ( pszModelName != NULL )
	{
		nModelIndex = modelinfo->GetModelIndex( pszModelName );
		
		if ( nModelIndex == -1 )
		{
			// Model could not be found
			Assert( !"Model could not be found, index is -1" );
			return false;
		}
	}
	else
	{
		nModelIndex = -1;
	}

	Interp_SetupMappings( GetVarMapping() );

	return InitializeAsClientEntityByIndex( nModelIndex, renderGroup );
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
bool C_BaseEntity::InitializeAsClientEntityByIndex( int iIndex, RenderGroup_t renderGroup )
{
	index = -1;

	// Setup model data.
	SetModelByIndex( iIndex );

	// Add the client entity to the master entity list.
	cl_entitylist->AddNonNetworkableEntity( GetIClientUnknown() );
	Assert( GetClientHandle() != ClientEntityList().InvalidHandle() );

	// Add the client entity to the renderable "leaf system." (Renderable)
	AddToLeafSystem( renderGroup );

	// Add the client entity to the spatial partition. (Collidable)
	CollisionProp()->CreatePartitionHandle();

	SpawnClientEntity();

	return true;
}


void C_BaseEntity::Term()
{
	C_BaseEntity::PhysicsRemoveTouchedList( this );
	C_BaseEntity::PhysicsRemoveGroundList( this );
	DestroyAllDataObjects();

#if !defined( NO_ENTITY_PREDICTION )
	// Remove from the predictables list
	if ( GetPredictable() || IsClientCreated() )
	{
		g_Predictables.RemoveFromPredictablesList( GetClientHandle() );
	}

	// If it's play simulated, remove from simulation list if the player still exists...
	if ( IsPlayerSimulated() && C_BasePlayer::GetLocalPlayer() )
	{
		C_BasePlayer::GetLocalPlayer()->RemoveFromPlayerSimulationList( this );
	}
#endif

	if ( GetClientHandle() != INVALID_CLIENTENTITY_HANDLE )
	{
		if ( GetThinkHandle() != INVALID_THINK_HANDLE )
		{
			ClientThinkList()->RemoveThinkable( GetClientHandle() );
		}

		// Remove from the client entity list.
		ClientEntityList().RemoveEntity( GetClientHandle() );

		m_RefEHandle = INVALID_CLIENTENTITY_HANDLE;
	}
	
	// Are we in the partition?
	CollisionProp()->DestroyPartitionHandle();

	// If Client side only entity index will be -1
	if ( index != -1 )
	{
		beams->KillDeadBeams( this );
	}

	// Clean up the model instance
	DestroyModelInstance();

	// Clean up drawing
	RemoveFromLeafSystem();

	RemoveFromAimEntsList();
}


void C_BaseEntity::SetRefEHandle( const CBaseHandle &handle )
{
	m_RefEHandle = handle;
}


const CBaseHandle& C_BaseEntity::GetRefEHandle() const
{
	return m_RefEHandle;
}

//-----------------------------------------------------------------------------
// Purpose: Free beams and destroy object
//-----------------------------------------------------------------------------
void C_BaseEntity::Release()
{
	{
		C_BaseAnimating::AutoAllowBoneAccess boneaccess( true, true );
		UnlinkFromHierarchy();
	}

	// Note that this must be called from here, not the destructor, because otherwise the
	//  vtable is hosed and the derived classes function is not going to get called!!!
	if ( IsIntermediateDataAllocated() )
	{
		DestroyIntermediateData();
	}

	UpdateOnRemove();

	delete this;
}


//-----------------------------------------------------------------------------
// Only meant to be called from subclasses.
// Returns true if instance valid, false otherwise
//-----------------------------------------------------------------------------
void C_BaseEntity::CreateModelInstance()
{
	if ( m_ModelInstance == MODEL_INSTANCE_INVALID )
	{
		m_ModelInstance = modelrender->CreateInstance( this );
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::DestroyModelInstance()
{
	if (m_ModelInstance != MODEL_INSTANCE_INVALID)
	{
		modelrender->DestroyInstance( m_ModelInstance );
		m_ModelInstance = MODEL_INSTANCE_INVALID;
	}
}

void C_BaseEntity::SetRemovalFlag( bool bRemove ) 
{ 
	if (bRemove) 
		m_iEFlags |= EFL_KILLME; 
	else 
		m_iEFlags &= ~EFL_KILLME; 
}


//-----------------------------------------------------------------------------
// VPhysics objects..
//-----------------------------------------------------------------------------
int C_BaseEntity::VPhysicsGetObjectList( IPhysicsObject **pList, int listMax )
{
	IPhysicsObject *pPhys = VPhysicsGetObject();
	if ( pPhys )
	{
		// multi-object entities must implement this function
		Assert( !(pPhys->GetGameFlags() & FVPHYSICS_MULTIOBJECT_ENTITY) );
		if ( listMax > 0 )
		{
			pList[0] = pPhys;
			return 1;
		}
	}
	return 0;
}

bool C_BaseEntity::VPhysicsIsFlesh( void )
{
	IPhysicsObject *pList[VPHYSICS_MAX_OBJECT_LIST_COUNT];
	int count = VPhysicsGetObjectList( pList, ARRAYSIZE(pList) );
	for ( int i = 0; i < count; i++ )
	{
		int material = pList[i]->GetMaterialIndex();
		const surfacedata_t *pSurfaceData = physprops->GetSurfaceData( material );
		// Is flesh ?, don't allow pickup
		if ( pSurfaceData->game.material == CHAR_TEX_ANTLION || pSurfaceData->game.material == CHAR_TEX_FLESH || pSurfaceData->game.material == CHAR_TEX_BLOODYFLESH || pSurfaceData->game.material == CHAR_TEX_ALIENFLESH )
			return true;
	}
	return false;
}

//-----------------------------------------------------------------------------
// Returns the health fraction
//-----------------------------------------------------------------------------
float C_BaseEntity::HealthFraction() const
{
	if (GetMaxHealth() == 0)
		return 1.0f;

	float flFraction = (float)GetHealth() / (float)GetMaxHealth();
	flFraction = clamp( flFraction, 0.0f, 1.0f );
	return flFraction;
}


//-----------------------------------------------------------------------------
// Purpose: Retrieves the coordinate frame for this entity.
// Input  : forward - Receives the entity's forward vector.
//			right - Receives the entity's right vector.
//			up - Receives the entity's up vector.
//-----------------------------------------------------------------------------
void C_BaseEntity::GetVectors(Vector* pForward, Vector* pRight, Vector* pUp) const
{
	// This call is necessary to cause m_rgflCoordinateFrame to be recomputed
	const matrix3x4_t &entityToWorld = EntityToWorldTransform();

	if (pForward != NULL)
	{
		MatrixGetColumn( entityToWorld, 0, *pForward ); 
	}

	if (pRight != NULL)
	{
		MatrixGetColumn( entityToWorld, 1, *pRight ); 
		*pRight *= -1.0f;
	}

	if (pUp != NULL)
	{
		MatrixGetColumn( entityToWorld, 2, *pUp ); 
	}
}

void C_BaseEntity::UpdateVisibility()
{
#ifdef TF_CLIENT_DLL
	// TF prevents drawing of any entity attached to players that aren't items in the inventory of the player.
	// This is to prevent servers creating fake cosmetic items and attaching them to players.
	if ( !engine->IsPlayingDemo() )
	{
		static bool bIsStaging = ( engine->GetAppID() == 810 );
		if ( !m_bValidatedOwner )
		{
			bool bRetry = false;

			// Check it the first time we call update visibility (Source TV doesn't bother doing validation)
			m_bDeemedInvalid = engine->IsHLTV() ? false : !ValidateEntityAttachedToPlayer( bRetry );
			m_bValidatedOwner = !bRetry;
		}

		if ( m_bDeemedInvalid )
		{
			if ( bIsStaging )
			{
				if ( !m_bWasDeemedInvalid )
				{
					m_PreviousRenderMode = GetRenderMode();
					m_PreviousRenderColor = GetRenderColor();
					m_bWasDeemedInvalid = true;
				}

				SetRenderMode( kRenderTransColor );
				SetRenderColor( 255, 0, 0, 200 );

			}
			else
			{
				RemoveFromLeafSystem();
				return;
			}
		}
		else if ( m_bWasDeemedInvalid )
		{
			if ( bIsStaging )
			{
				// We need to fix up the rendering.
				SetRenderMode( m_PreviousRenderMode );
				SetRenderColor( m_PreviousRenderColor.r, m_PreviousRenderColor.g, m_PreviousRenderColor.b, m_PreviousRenderColor.a );
			}

			m_bWasDeemedInvalid = false;
		}
	}
#endif

	if ( ShouldDraw() && !IsDormant() && ( !ToolsEnabled() || IsEnabledInToolView() ) )
	{
		// add/update leafsystem
		AddToLeafSystem();
	}
	else
	{
		// remove from leaf system
		RemoveFromLeafSystem();
	}
}

//-----------------------------------------------------------------------------
// Purpose: Returns whether object should render.
//-----------------------------------------------------------------------------
bool C_BaseEntity::ShouldDraw()
{
// Only test this in tf2
#if defined( INVASION_CLIENT_DLL )
	// Let the client mode (like commander mode) reject drawing entities.
	if (g_pClientMode && !g_pClientMode->ShouldDrawEntity(this) )
		return false;
#endif

	// Some rendermodes prevent rendering
	if ( m_nRenderMode == kRenderNone )
		return false;

	return (model != 0) && !IsEffectActive(EF_NODRAW) && (index != 0);
}

bool C_BaseEntity::TestCollision( const Ray_t& ray, unsigned int mask, trace_t& trace )
{
	return false;
}

bool C_BaseEntity::TestHitboxes( const Ray_t &ray, unsigned int fContentsMask, trace_t& tr )
{
	return false;
}

//-----------------------------------------------------------------------------
// Used when the collision prop is told to ask game code for the world-space surrounding box
//-----------------------------------------------------------------------------
void C_BaseEntity::ComputeWorldSpaceSurroundingBox( Vector *pVecWorldMins, Vector *pVecWorldMaxs )
{
	// This should only be called if you're using USE_GAME_CODE on the server
	// and you forgot to implement the client-side version of this method.
	Assert(0);
}


//-----------------------------------------------------------------------------
// Purpose: Derived classes will have to write their own message cracking routines!!!
// Input  : length - 
//			*data - 
//-----------------------------------------------------------------------------
void C_BaseEntity::ReceiveMessage( int classID, bf_read &msg )
{
	// BaseEntity doesn't have a base class we could relay this message to
	Assert( classID == GetClientClass()->m_ClassID );
	
	int messageType = msg.ReadByte();
	switch( messageType )
	{
		case BASEENTITY_MSG_REMOVE_DECALS:	RemoveAllDecals();
											break;
	}
}


void* C_BaseEntity::GetDataTableBasePtr()
{
	return this;
}


//-----------------------------------------------------------------------------
// Should this object cast shadows?
//-----------------------------------------------------------------------------
ShadowType_t C_BaseEntity::ShadowCastType()
{
	if (IsEffectActive(EF_NODRAW | EF_NOSHADOW))
		return SHADOWS_NONE;

	int modelType = modelinfo->GetModelType( model );
	return (modelType == mod_studio) ? SHADOWS_RENDER_TO_TEXTURE : SHADOWS_NONE;
}


//-----------------------------------------------------------------------------
// Per-entity shadow cast distance + direction
//-----------------------------------------------------------------------------
bool C_BaseEntity::GetShadowCastDistance( float *pDistance, ShadowType_t shadowType ) const			
{ 
	if ( m_flShadowCastDistance != 0.0f )
	{
		*pDistance = m_flShadowCastDistance; 
		return true;
	}
	return false;
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
C_BaseEntity *C_BaseEntity::GetShadowUseOtherEntity( void ) const
{
	return m_ShadowDirUseOtherEntity;
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void C_BaseEntity::SetShadowUseOtherEntity( C_BaseEntity *pEntity )
{
	m_ShadowDirUseOtherEntity = pEntity;
}

CInterpolatedVar< QAngle >& C_BaseEntity::GetRotationInterpolator()
{
	return m_iv_angRotation;
}

CInterpolatedVar< Vector >& C_BaseEntity::GetOriginInterpolator()
{
	return m_iv_vecOrigin;
}

//-----------------------------------------------------------------------------
// Purpose: Return a per-entity shadow cast direction
//-----------------------------------------------------------------------------
bool C_BaseEntity::GetShadowCastDirection( Vector *pDirection, ShadowType_t shadowType ) const			
{ 
	if ( m_ShadowDirUseOtherEntity )
		return m_ShadowDirUseOtherEntity->GetShadowCastDirection( pDirection, shadowType );

	return false;
}


//-----------------------------------------------------------------------------
// Should this object receive shadows?
//-----------------------------------------------------------------------------
bool C_BaseEntity::ShouldReceiveProjectedTextures( int flags )
{
	Assert( flags & SHADOW_FLAGS_PROJECTED_TEXTURE_TYPE_MASK );

	if ( IsEffectActive( EF_NODRAW ) )
		 return false;

	if( flags & SHADOW_FLAGS_FLASHLIGHT )
	{
		if ( GetRenderMode() > kRenderNormal && GetRenderColor().a == 0 )
			 return false;

		return true;
	}

	Assert( flags & SHADOW_FLAGS_SHADOW );

	if ( IsEffectActive( EF_NORECEIVESHADOW ) )
		 return false;

	if (modelinfo->GetModelType( model ) == mod_studio)
		return false;

	return true;
}


//-----------------------------------------------------------------------------
// Shadow-related methods
//-----------------------------------------------------------------------------
bool C_BaseEntity::IsShadowDirty( )
{
	return IsEFlagSet( EFL_DIRTY_SHADOWUPDATE );
}

void C_BaseEntity::MarkShadowDirty( bool bDirty )
{
	if ( bDirty )
	{
		AddEFlags( EFL_DIRTY_SHADOWUPDATE );
	}
	else
	{
		RemoveEFlags( EFL_DIRTY_SHADOWUPDATE );
	}
}

IClientRenderable *C_BaseEntity::GetShadowParent()
{
	C_BaseEntity *pParent = GetMoveParent();
	return pParent ? pParent->GetClientRenderable() : NULL;
}

IClientRenderable *C_BaseEntity::FirstShadowChild()
{
	C_BaseEntity *pChild = FirstMoveChild();
	return pChild ? pChild->GetClientRenderable() : NULL;
}

IClientRenderable *C_BaseEntity::NextShadowPeer()
{
	C_BaseEntity *pPeer = NextMovePeer();
	return pPeer ? pPeer->GetClientRenderable() : NULL;
}

	
//-----------------------------------------------------------------------------
// Purpose: Returns index into entities list for this entity
// Output : Index
//-----------------------------------------------------------------------------
int	C_BaseEntity::entindex( void ) const
{
	return index;
}

int C_BaseEntity::GetSoundSourceIndex() const
{
#ifdef _DEBUG
	if ( index != -1 )
	{
		Assert( index == GetRefEHandle().GetEntryIndex() );
	}
#endif
	return GetRefEHandle().GetEntryIndex();
}

//-----------------------------------------------------------------------------
// Get render origin and angles
//-----------------------------------------------------------------------------
const Vector& C_BaseEntity::GetRenderOrigin( void )
{
	return GetAbsOrigin();
}

const QAngle& C_BaseEntity::GetRenderAngles( void )
{
	return GetAbsAngles();
}

const matrix3x4_t &C_BaseEntity::RenderableToWorldTransform()
{
	return EntityToWorldTransform();
}

IPVSNotify* C_BaseEntity::GetPVSNotifyInterface()
{
	return NULL;
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : theMins - 
//			theMaxs - 
//-----------------------------------------------------------------------------
void C_BaseEntity::GetRenderBounds( Vector& theMins, Vector& theMaxs )
{
	int nModelType = modelinfo->GetModelType( model );
	if (nModelType == mod_studio || nModelType == mod_brush)
	{
		modelinfo->GetModelRenderBounds( GetModel(), theMins, theMaxs );
	}
	else
	{
		// By default, we'll just snack on the collision bounds, transform
		// them into entity-space, and call it a day.
		if ( GetRenderAngles() == CollisionProp()->GetCollisionAngles() )
		{
			theMins = CollisionProp()->OBBMins();
			theMaxs = CollisionProp()->OBBMaxs();
		}
		else
		{
			Assert( CollisionProp()->GetCollisionAngles() == vec3_angle );
			if ( IsPointSized() )
			{
				//theMins = CollisionProp()->GetCollisionOrigin();
				//theMaxs	= theMins;
				theMins = theMaxs = vec3_origin;
			}
			else
			{
				// NOTE: This shouldn't happen! Or at least, I haven't run
				// into a valid case where it should yet.
//				Assert(0);
				IRotateAABB( EntityToWorldTransform(), CollisionProp()->OBBMins(), CollisionProp()->OBBMaxs(), theMins, theMaxs );
			}
		}
	}
}

void C_BaseEntity::GetRenderBoundsWorldspace( Vector& mins, Vector& maxs )
{
	DefaultRenderBoundsWorldspace( this, mins, maxs );
}


void C_BaseEntity::GetShadowRenderBounds( Vector &mins, Vector &maxs, ShadowType_t shadowType )
{
	m_EntClientFlags |= ENTCLIENTFLAG_GETTINGSHADOWRENDERBOUNDS;
	GetRenderBounds( mins, maxs );
	m_EntClientFlags &= ~ENTCLIENTFLAG_GETTINGSHADOWRENDERBOUNDS;
}


//-----------------------------------------------------------------------------
// Purpose: Last received origin
// Output : const float
//-----------------------------------------------------------------------------
const Vector& C_BaseEntity::GetAbsOrigin( void ) const
{
	//Assert( s_bAbsQueriesValid );
	const_cast<C_BaseEntity*>(this)->CalcAbsolutePosition();
	return m_vecAbsOrigin;
}


//-----------------------------------------------------------------------------
// Purpose: Last received angles
// Output : const
//-----------------------------------------------------------------------------
const QAngle& C_BaseEntity::GetAbsAngles( void ) const
{
	//Assert( s_bAbsQueriesValid );
	const_cast<C_BaseEntity*>(this…