1HEADmaster

1 files changed, 750 insertions, 0 deletions

diff --git a/game/client/replay/replay_ragdoll.cpp b/game/client/replay/replay_ragdoll.cpp
new file mode 100644
index 0000000..1327a8c
--- /dev/null
+++ b/game/client/replay/replay_ragdoll.cpp
@@ -0,0 +1,750 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// TODO:
+//    - Use a mempool
+//    - Need to be able to gracefully turn replay ragdolls on/off
+//
+//----------------------------------------------------------------------------------------
+
+#include "cbase.h"
+
+#if defined( REPLAY_ENABLED )
+
+#include "replay_ragdoll.h"
+#include "tier1/mempool.h"
+#include "debugoverlay_shared.h"
+#include "filesystem.h"
+
+//--------------------------------------------------------------------------------
+
+static matrix3x4_t gs_BoneCache[ MAXSTUDIOBONES ];
+static int gs_nBytesAllocated = 0;
+
+//--------------------------------------------------------------------------------
+
+void OnReplayCacheClientRagdollsCvarChange( IConVar *pVar, const char *pOldValue, float flOldValue )
+{
+	// TODO: need to be able to gracefully turn replay ragdolls on/off
+}
+
+//--------------------------------------------------------------------------------
+
+static ConVar replay_ragdoll_dbg( "replay_ragdoll_dbg", "0", FCVAR_CLIENTDLL, "Display replay ragdoll debugging information." );
+static ConVar replay_cache_client_ragdolls( "replay_cache_client_ragdolls", "0", FCVAR_CLIENTDLL, "Record ragdolls on the client during.", OnReplayCacheClientRagdollsCvarChange );
+
+//--------------------------------------------------------------------------------
+
+void DrawBones( matrix3x4_t const* pBones, int nNumBones, ragdoll_t const* pRagdoll,
+			    int nRed, int nGreen, int nBlue, C_BaseAnimating* pBaseAnimating )
+{
+	Assert( pBones );
+	Assert( pRagdoll );
+	Assert( pBaseAnimating );
+
+	Vector from, to;
+	for ( int i = 0; i < nNumBones; ++i )
+	{
+//		debugoverlay->AddCoordFrameOverlay( pBones[ i ], 3.0f );
+
+		int const iRagdollParentIndex = pRagdoll->list[ i ].parentIndex;
+		if ( iRagdollParentIndex < 0 )
+			continue;
+
+		int iBoneIndex = pRagdoll->boneIndex[ i ];
+		int iParentIndex = pRagdoll->boneIndex[ iRagdollParentIndex ];
+
+		MatrixPosition( pBones[ iParentIndex ], from );
+		MatrixPosition( pBones[ iBoneIndex   ], to );
+
+		if ( debugoverlay )
+		{
+			debugoverlay->AddLineOverlay( from, to, nRed, nGreen, nBlue, true, 0.0f );
+		}
+	}
+}
+
+//--------------------------------------------------------------------------------
+
+inline int GetServerTickCount()
+{
+	int nTick = TIME_TO_TICKS( engine->GetLastTimeStamp() );
+	return nTick;
+}
+
+//--------------------------------------------------------------------------------
+
+/*static*/ RagdollSimulationFrame_t* RagdollSimulationFrame_t::Alloc( int nNumBones )
+{
+	// TODO: use a mempool
+	RagdollSimulationFrame_t* pNew = new RagdollSimulationFrame_t();
+	pNew->pPositions = new Vector[ nNumBones ];
+	pNew->pAngles = new QAngle[ nNumBones ];
+	gs_nBytesAllocated += sizeof( pNew ) + nNumBones * ( sizeof( Vector ) + sizeof( QAngle ) );
+	return pNew;
+}
+
+//--------------------------------------------------------------------------------
+
+RagdollSimulationData_t::RagdollSimulationData_t( C_BaseAnimating* pEntity, int nStartTick, int nNumBones )
+:	m_pEntity( pEntity ),
+	m_nEntityIndex( -1 ),
+	m_nStartTick( nStartTick ),
+	m_nNumBones( nNumBones ),
+	m_nDuration( -1 )
+{
+	if ( pEntity )
+	{
+		m_nEntityIndex = pEntity->entindex();
+	}
+
+	Assert( nNumBones >= 0 && nNumBones < MAXSTUDIOBONES );
+}
+
+bool _ComputeRagdollBones( const ragdoll_t *pRagdoll, matrix3x4_t &parentTransform, matrix3x4_t *pBones, Vector *pPositions, QAngle *pAngles )
+{
+	matrix3x4_t inverted, output;
+
+#ifdef _DEBUG
+	CBitVec<MAXSTUDIOBONES> vBonesComputed;
+	vBonesComputed.ClearAll();
+#endif
+
+	for ( int i = 0; i < pRagdoll->listCount; ++i )
+	{
+		const ragdollelement_t& element = pRagdoll->list[ i ];
+
+		// during restore if a model has changed since the file was saved, this could be NULL
+		if ( !element.pObject )
+			return false;
+
+		int const boneIndex = pRagdoll->boneIndex[ i ];
+		if ( boneIndex < 0 )
+		{
+			AssertMsg( 0, "Replay: No mapping for ragdoll bone\n" );
+			return false;
+		}
+
+		// Get global transform and put it into the bone cache
+		element.pObject->GetPositionMatrix( &pBones[ boneIndex ] );
+
+		// Ensure a fixed translation from the parent (no stretching)
+		if ( element.parentIndex >= 0 && !pRagdoll->allowStretch )
+		{
+			int parentIndex = pRagdoll->boneIndex[ element.parentIndex ];
+
+#ifdef _DEBUG
+			// Make sure we computed the parent already
+			Assert( vBonesComputed.IsBitSet(parentIndex) );
+#endif
+
+			// overwrite the position from physics to force rigid attachment
+			// NOTE: On the client we actually override this with the proper parent bone in each LOD
+			Vector out;
+			VectorTransform( element.originParentSpace, pBones[ parentIndex ], out );
+			MatrixSetColumn( out, 3, pBones[ boneIndex ] );
+
+			MatrixInvert( pBones[ parentIndex ], inverted );
+		}
+		else if ( element.parentIndex == - 1 )
+		{
+			// Decompose into parent space
+			MatrixInvert( parentTransform, inverted );
+		}
+
+#ifdef _DEBUG
+		vBonesComputed.Set( boneIndex, true );
+#endif
+
+		// Compute local transform and put into 'output'
+ 		ConcatTransforms( inverted, pBones[ boneIndex ], output );
+
+		// Cache as Euler/position
+ 		MatrixAngles( output, pAngles[ i ], pPositions[ i ] );
+	}
+	return true;
+}
+
+void RagdollSimulationData_t::Record()
+{
+	Assert( m_pEntity->m_pRagdoll );
+
+	// Allocate a frame
+	RagdollSimulationFrame_t* pNewFrame = RagdollSimulationFrame_t::Alloc( m_nNumBones );
+	if ( !pNewFrame )
+		return;
+
+	// Set the current tick
+	pNewFrame->nTick = GetServerTickCount();
+
+	// Add new frame to list of frames
+	m_lstFrames.AddToTail( pNewFrame );
+
+	// Compute parent transform
+	matrix3x4_t parentTransform;
+	Vector vRootPosition = m_pEntity->GetRenderOrigin();
+	QAngle angRootAngles = m_pEntity->GetRenderAngles();
+	AngleMatrix( angRootAngles, vRootPosition, parentTransform );
+
+//	debugoverlay->AddCoordFrameOverlay( parentTransform, 100 );
+
+	// Cache off root position/orientation
+	pNewFrame->vRootPosition = vRootPosition;
+	pNewFrame->angRootAngles = angRootAngles;
+
+	// Compute actual ragdoll bones
+	matrix3x4_t* pBones = gs_BoneCache;
+	_ComputeRagdollBones( m_pEntity->m_pRagdoll->GetRagdoll(), parentTransform, pBones, pNewFrame->pPositions, pNewFrame->pAngles );
+
+	// Draw bones
+	if ( replay_ragdoll_dbg.GetBool() )
+	{
+		DrawBones( pBones, m_pEntity->m_pRagdoll->RagdollBoneCount(), m_pEntity->m_pRagdoll->GetRagdoll(), 255, 0, 0, m_pEntity );
+	}
+}
+
+//--------------------------------------------------------------------------------
+
+CReplayRagdollRecorder::CReplayRagdollRecorder()
+:	m_bIsRecording(false)
+{
+}
+
+CReplayRagdollRecorder::~CReplayRagdollRecorder()
+{
+}
+
+/*static*/ CReplayRagdollRecorder& CReplayRagdollRecorder::Instance()
+{
+	static CReplayRagdollRecorder s_instance;
+	return s_instance;
+}
+
+void CReplayRagdollRecorder::Init()
+{
+	Assert( !m_bIsRecording );
+	m_bIsRecording = true;
+	gs_nBytesAllocated = 0;
+}
+
+void CReplayRagdollRecorder::Shutdown()
+{
+	if ( !m_bIsRecording )
+		return;
+
+	m_lstRagdolls.PurgeAndDeleteElements();
+	gs_nBytesAllocated = 0;
+
+	// RemoveAll() purges, and there is no UnlinkAll() - is there an easier way to do this?
+	Iterator_t i = m_lstRagdollsToRecord.Head();
+	while ( i != m_lstRagdollsToRecord.InvalidIndex() )
+	{
+		m_lstRagdollsToRecord.Unlink( i );
+		i = m_lstRagdollsToRecord.Head();
+	}
+
+	Assert( m_bIsRecording );
+	m_bIsRecording = false;
+}
+
+void CReplayRagdollRecorder::AddEntry( C_BaseAnimating* pEntity, int nStartTick, int nNumBones )
+{
+	DevMsg( "Replay: Processing Ragdoll at time %d\n", nStartTick );
+
+	Assert( pEntity );
+	RagdollSimulationData_t* pNewEntry = new RagdollSimulationData_t( pEntity, nStartTick, nNumBones );
+	gs_nBytesAllocated += sizeof( RagdollSimulationData_t );
+	m_lstRagdolls.AddToTail( pNewEntry );
+
+	// Also add to list of ragdolls to record
+	m_lstRagdollsToRecord.AddToTail( pNewEntry );
+}
+
+void CReplayRagdollRecorder::StopRecordingRagdoll( C_BaseAnimating* pEntity )
+{
+	Assert( pEntity );
+
+	// Find the entry in the recording list
+	Iterator_t nIndex;
+	if ( !FindEntryInRecordingList( pEntity, nIndex ) )
+		return;
+
+	StopRecordingRagdollAtIndex( nIndex );
+}
+
+void CReplayRagdollRecorder::StopRecordingRagdollAtIndex( Iterator_t nIndex )
+{
+	// No longer recording - compute duration
+	RagdollSimulationData_t* pData = m_lstRagdollsToRecord[ nIndex ];
+
+	// Does duration need to be set?
+	if ( pData->m_nDuration < 0 )
+	{
+		pData->m_nDuration = GetServerTickCount() - pData->m_nStartTick;		Assert( pData->m_nDuration > 0 );
+	}
+
+	// Remove it from the recording list
+	m_lstRagdollsToRecord.Unlink( nIndex );
+}
+
+void CReplayRagdollRecorder::StopRecordingSleepingRagdolls()
+{
+	Iterator_t i = m_lstRagdollsToRecord.Head();
+	while ( i != m_lstRagdollsToRecord.InvalidIndex() )
+	{
+		if ( RagdollIsAsleep( *m_lstRagdollsToRecord[ i ]->m_pEntity->m_pRagdoll->GetRagdoll() ) )
+		{
+			DevMsg( "entity %d: Removing sleeping ragdoll\n", m_lstRagdollsToRecord[ i ]->m_nEntityIndex );
+
+			StopRecordingRagdollAtIndex( i );
+			i = m_lstRagdollsToRecord.Head();
+		}
+		else
+		{
+			i = m_lstRagdollsToRecord.Next( i );
+		}
+	}
+}
+
+bool CReplayRagdollRecorder::FindEntryInRecordingList( C_BaseAnimating* pEntity,
+													   CReplayRagdollRecorder::Iterator_t& nOutIndex )
+{
+	// Find the entry
+	FOR_EACH_LL( m_lstRagdollsToRecord, i )
+	{
+		if ( m_lstRagdollsToRecord[ i ]->m_pEntity == pEntity )
+		{
+			nOutIndex = i;
+			return true;
+		}
+	}
+
+	nOutIndex = m_lstRagdollsToRecord.InvalidIndex();
+	return false;
+}
+
+void CReplayRagdollRecorder::Record()
+{
+	static ConVar* pReplayEnable = NULL;
+	static bool bLookedForConvar = false;
+	if ( bLookedForConvar )
+	{
+		pReplayEnable =  (ConVar*)cvar->FindVar( "replay_enable" );
+		bLookedForConvar = true;
+	}
+	if ( !pReplayEnable || !pReplayEnable->GetInt() )
+		return;
+
+	if ( !replay_cache_client_ragdolls.GetInt() )
+		return;
+
+	FOR_EACH_LL( m_lstRagdollsToRecord, i )
+	{
+		Assert( m_lstRagdollsToRecord[ i ]->m_pEntity->IsRagdoll() );
+		m_lstRagdollsToRecord[ i ]->Record();
+	}
+}
+
+void CReplayRagdollRecorder::Think()
+{
+	if ( !IsRecording() )
+		return;
+
+	StopRecordingSleepingRagdolls();
+	Record();
+
+	PrintDebug();
+}
+
+void CReplayRagdollRecorder::PrintDebug()
+{
+	if ( !replay_ragdoll_dbg.GetInt() )
+		return;
+
+	int nLine = 0;
+
+	// Print memory usage
+	engine->Con_NPrintf( nLine++, "ragdolls: %.2f MB", gs_nBytesAllocated / 1048576.0f );
+
+	// Print server time
+	engine->Con_NPrintf( nLine++, "server time: %d", GetServerTickCount() );
+
+	++nLine;  // Blank line
+
+	// Print info about each ragdoll
+	FOR_EACH_LL( m_lstRagdolls, i )
+	{
+		engine->Con_NPrintf( nLine++, "entity %d: start time=%d  duration=%d  num bones=%d", m_lstRagdolls[i]->m_nEntityIndex, m_lstRagdolls[i]->m_nStartTick, m_lstRagdolls[i]->m_nDuration, m_lstRagdolls[i]->m_nNumBones );
+	}
+}
+
+void CReplayRagdollRecorder::CleanupStartupTicksAndDurations( int nStartTick )
+{
+	FOR_EACH_LL( m_lstRagdolls, i )
+	{
+		RagdollSimulationData_t* pRagdollData = m_lstRagdolls[ i ];
+
+		// Offset start tick with start tick, sent over from server
+		pRagdollData->m_nStartTick -= nStartTick;			Assert( pRagdollData->m_nStartTick >= 0 );
+
+		// Setup duration
+		pRagdollData->m_nDuration = GetServerTickCount() - nStartTick;		Assert( pRagdollData->m_nDuration > 0 );
+
+		// Go through all frames and subtract the start tick
+		FOR_EACH_LL( pRagdollData->m_lstFrames, j )
+		{
+			pRagdollData->m_lstFrames[ j ]->nTick -= nStartTick;
+		}
+	}
+}
+
+BEGIN_DMXELEMENT_UNPACK( RagdollSimulationData_t )
+	DMXELEMENT_UNPACK_FIELD( "nEntityIndex", "0", int, m_nEntityIndex )
+	DMXELEMENT_UNPACK_FIELD( "nStartTick", "0", int, m_nStartTick )
+	DMXELEMENT_UNPACK_FIELD( "nDuration", "0", int, m_nDuration )
+	DMXELEMENT_UNPACK_FIELD( "nNumBones", "0", int, m_nNumBones )
+END_DMXELEMENT_UNPACK( RagdollSimulationData_t, s_RagdollSimulationDataUnpack )
+
+bool CReplayRagdollRecorder::DumpRagdollsToDisk( char const* pFilename ) const
+{
+	MEM_ALLOC_CREDIT();
+	DECLARE_DMX_CONTEXT();
+
+	CDmxElement* pSimulations = CreateDmxElement( "Simulations" );
+	CDmxElementModifyScope modify( pSimulations );
+
+		int const nNumRagdolls = m_lstRagdolls.Count();
+
+		pSimulations->SetValue( "iNumRagdolls", nNumRagdolls );
+
+		CDmxAttribute* pRagdolls = pSimulations->AddAttribute( "ragdolls" );
+		CUtlVector< CDmxElement* >& ragdolls = pRagdolls->GetArrayForEdit< CDmxElement* >();
+
+	modify.Release();
+
+	char name[32];
+
+	FOR_EACH_LL( m_lstRagdolls, i )
+	{
+		RagdollSimulationData_t const* pData = m_lstRagdolls[ i ];
+
+		// Make sure we've setup all durations properly
+		Assert( pData->m_nDuration >= 0 );
+
+		CDmxElement* pRagdoll = CreateDmxElement( "ragdoll" );
+		ragdolls.AddToTail( pRagdoll );
+
+		V_snprintf( name, sizeof(name), "ragdoll %d", i );
+		pRagdoll->SetValue( "name", name );
+
+		CDmxElementModifyScope modifyClass( pRagdoll );
+
+		pRagdoll->AddAttributesFromStructure( pData, s_RagdollSimulationDataUnpack );
+
+		CDmxAttribute* pFrames = pRagdoll->AddAttribute( "frames" );
+		CUtlVector< CDmxElement* >& frames = pFrames->GetArrayForEdit< CDmxElement* >();
+
+		FOR_EACH_LL( pData->m_lstFrames, j )
+		{
+			CDmxElement* pFrame = CreateDmxElement( "frame" );
+			frames.AddToTail( pFrame );
+
+			V_snprintf( name, sizeof(name), "frame %d", j );
+			pFrame->SetValue( "name", name );
+
+			// Store tick
+			pFrame->SetValue( "tick", pData->m_lstFrames[ j ]->nTick );
+
+			// Store root pos/orientation
+			pFrame->SetValue( "root_pos"   , pData->m_lstFrames[ j ]->vRootPosition );
+			pFrame->SetValue( "root_angles", pData->m_lstFrames[ j ]->angRootAngles );
+
+			for ( int k = 0; k < pData->m_nNumBones; ++k )
+			{
+				CDmxAttribute* pPositions = pFrame->AddAttribute( "positions" );
+				CUtlVector< Vector >& positions = pPositions->GetArrayForEdit< Vector >();
+
+				CDmxAttribute* pAngles = pFrame->AddAttribute( "angles" );
+				CUtlVector< QAngle >& angles = pAngles->GetArrayForEdit< QAngle >();
+
+				positions.AddToTail( pData->m_lstFrames[ j ]->pPositions[ k ] );
+				angles.AddToTail( pData->m_lstFrames[ j ]->pAngles[ k ] );
+			}
+		}
+	}
+
+	{
+		MEM_ALLOC_CREDIT();
+		CUtlBuffer buf( 0, 0, CUtlBuffer::TEXT_BUFFER );
+		if ( !SerializeDMX( buf, pSimulations, pFilename ) )
+		{
+			Warning( "Replay: Failed to write ragdoll cache, %s.\n", pFilename );
+			return false;
+		}
+
+		// Write the file
+		filesystem->WriteFile( pFilename, "MOD", buf );
+	}
+
+	CleanupDMX( pSimulations );
+
+	Msg( "Replay: Cached ragdoll data.\n" );
+
+	return true;
+}
+
+//--------------------------------------------------------------------------------
+
+CReplayRagdollCache::CReplayRagdollCache()
+:	m_bInit( false )
+{
+}
+
+/*static*/ CReplayRagdollCache& CReplayRagdollCache::Instance()
+{
+	static CReplayRagdollCache s_instance;
+	return s_instance;
+}
+
+bool CReplayRagdollCache::Init( char const* pFilename )
+{
+	Assert( !m_bInit );
+
+	// Make sure valid filename
+	if ( !pFilename || pFilename[0] == 0 )
+		return false;
+
+	DECLARE_DMX_CONTEXT();
+
+	// Attempt to read from disk
+	CDmxElement* pRagdolls = NULL;
+	if ( !UnserializeDMX( pFilename, "MOD", true, &pRagdolls ) )
+//	if ( !UnserializeDMX( pFilename, "GAME", false, &pRagdolls ) )
+		return false;
+
+	CUtlVector< CDmxElement* > const& ragdolls = pRagdolls->GetArray< CDmxElement* >( "ragdolls" );
+	for ( int i = 0; i < ragdolls.Count(); ++i )
+	{
+		CDmxElement* pCurRagdollInput = ragdolls[ i ];
+
+		// Create a new ragdoll entry and add to list
+		RagdollSimulationData_t* pNewSimData = new RagdollSimulationData_t();
+		m_lstRagdolls.AddToTail( pNewSimData );
+
+		// Read
+		pCurRagdollInput->UnpackIntoStructure( pNewSimData, sizeof( *pNewSimData ), s_RagdollSimulationDataUnpack );
+
+		// NOTE: Entity ptr doesn't get linked up here because it doesn't necessarily exist at this point
+
+		// Read frames
+		CUtlVector< CDmxElement* > const& frames = pCurRagdollInput->GetArray< CDmxElement* >( "frames" );
+		for ( int j = 0; j < frames.Count(); ++j )
+		{
+			CDmxElement* pCurFrameInput = frames[ j ];
+
+			// Create a new frame and add it to list of frames
+			RagdollSimulationFrame_t* pNewFrame = RagdollSimulationFrame_t::Alloc( pNewSimData->m_nNumBones );
+			pNewSimData->m_lstFrames.AddToTail( pNewFrame );
+
+			// Read tick
+			pNewFrame->nTick = pCurFrameInput->GetValue( "tick", -1 );			Assert( pNewFrame->nTick != -1 );
+
+			// Read root pos/orientation
+			pNewFrame->vRootPosition = pCurFrameInput->GetValue( "root_pos"   , vec3_origin );
+			pNewFrame->angRootAngles = pCurFrameInput->GetValue( "root_angles", vec3_angle );
+
+			CUtlVector< Vector > const& positions = pCurFrameInput->GetArray< Vector >( "positions" );
+			CUtlVector< QAngle > const& angles = pCurFrameInput->GetArray< QAngle >( "angles" );
+
+			for ( int k = 0; k < pNewSimData->m_nNumBones; ++k )
+			{
+				pNewFrame->pPositions[ k ] = positions[ k ];
+				pNewFrame->pAngles[ k ]    = angles[ k ];
+			}
+		}
+	}
+
+
+	// Cleanup
+	CleanupDMX( pRagdolls );
+
+	m_bInit = true;
+
+	return true;
+}
+
+void CReplayRagdollCache::Shutdown()
+{
+	if ( !m_bInit )
+		return;
+
+	m_lstRagdolls.PurgeAndDeleteElements();
+	m_bInit = false;
+}
+
+ConVar replay_ragdoll_blending( "replay_ragdoll_blending", "1", FCVAR_DEVELOPMENTONLY );
+ConVar replay_ragdoll_tickoffset( "replay_ragdoll_tickoffset", "0", FCVAR_DEVELOPMENTONLY );
+
+bool CReplayRagdollCache::GetFrame( C_BaseAnimating* pEntity, int nTick, bool* pBoneSimulated, CBoneAccessor* pBoneAccessor ) const
+{
+	nTick += replay_ragdoll_tickoffset.GetInt();
+
+	Assert( pEntity );
+	Assert( pBoneSimulated );
+	Assert( pEntity->m_pRagdoll );
+
+	// Find ragdoll for the given entity - will return NULL if nTick is out of the entry's time window
+	const RagdollSimulationData_t* pRagdollEntry = FindRagdollEntry( pEntity, nTick );
+	if ( !pRagdollEntry )
+		return false;
+
+	// Find frame for the given tick
+	RagdollSimulationFrame_t* pFrame;
+	RagdollSimulationFrame_t* pNextFrame;
+	if ( !FindFrame( pFrame, pNextFrame, pRagdollEntry, nTick ) )
+		return false;
+
+	// Compute root transform
+	matrix3x4_t rootTransform;
+	float flInterpAmount = gpGlobals->interpolation_amount;
+	if ( pNextFrame )
+	{
+		AngleMatrix(
+			(const QAngle &)Lerp( flInterpAmount, pFrame->angRootAngles, pNextFrame->angRootAngles ),	// Actually does a slerp
+			Lerp( flInterpAmount, pFrame->vRootPosition, pNextFrame->vRootPosition ),
+			rootTransform
+		);
+	}
+	else
+	{
+		AngleMatrix( pFrame->angRootAngles, pFrame->vRootPosition, rootTransform );
+	}
+
+	// Compute each bone
+	ragdoll_t* pRagdoll = pEntity->m_pRagdoll->GetRagdoll();		Assert( pRagdoll );
+	for ( int k = 0; k < pRagdoll->listCount; ++k )
+	{
+		int objectIndex = k;
+		const ragdollelement_t& element = pRagdoll->list[ objectIndex ];
+
+		int const boneIndex = pRagdoll->boneIndex[ objectIndex ];			Assert( boneIndex >= 0 );
+
+		// Compute blended transform if possible
+		matrix3x4_t localTransform;
+		if ( pNextFrame && replay_ragdoll_blending.GetInt() )
+		{
+			// Get blended Eular angles - NOTE: The Lerp() here actually calls Lerp<QAngle>() which converts to quats and back
+			flInterpAmount = gpGlobals->interpolation_amount;		Assert( flInterpAmount >= 0.0f && flInterpAmount <= 1.0f );
+			AngleMatrix(
+				(const QAngle &)Lerp( flInterpAmount, pFrame->pAngles   [ objectIndex ], pNextFrame->pAngles   [ objectIndex ] ), 
+				Lerp( flInterpAmount, pFrame->pPositions[ objectIndex ], pNextFrame->pPositions[ objectIndex ] ),
+				localTransform
+			);
+		}
+		else
+		{
+			// Last frame
+			AngleMatrix( pFrame->pAngles[ objectIndex ], pFrame->pPositions[ objectIndex ], localTransform );
+		}
+
+		matrix3x4_t& boneMatrix = pBoneAccessor->GetBoneForWrite( boneIndex );
+
+		if ( element.parentIndex < 0 )
+		{
+			ConcatTransforms( rootTransform, localTransform, boneMatrix );
+		}
+		else
+		{
+			int parentBoneIndex = pRagdoll->boneIndex[ element.parentIndex ];		Assert( parentBoneIndex >= 0 );
+			Assert( pBoneSimulated[ parentBoneIndex ] );
+			matrix3x4_t const& parentMatrix = pBoneAccessor->GetBone( parentBoneIndex );
+			ConcatTransforms( parentMatrix, localTransform, boneMatrix );
+		}
+
+		// Simulated this bone
+		pBoneSimulated[ boneIndex ] = true;
+	}
+
+	if ( replay_ragdoll_dbg.GetBool() )
+	{
+		DrawBones( pBoneAccessor->GetBoneArrayForWrite(), pRagdollEntry->m_nNumBones, pRagdoll, 0, 0, 255, pEntity );
+	}
+
+	return true;
+}
+
+RagdollSimulationData_t* CReplayRagdollCache::FindRagdollEntry( C_BaseAnimating* pEntity, int nTick )
+{
+	Assert( pEntity );
+
+	int const nEntIndex = pEntity->entindex();
+
+	FOR_EACH_LL( m_lstRagdolls, i )
+	{
+		RagdollSimulationData_t* pRagdollData = m_lstRagdolls[ i ];
+
+		// If not the right entity or the tick is out range, continue.
+		if ( pRagdollData->m_nEntityIndex != nEntIndex )
+			continue;
+
+		// We've got the ragdoll, but only return it if nTick is in the window
+		if ( nTick < pRagdollData->m_nStartTick ||
+			 nTick > pRagdollData->m_nStartTick + pRagdollData->m_nDuration )
+			return NULL;
+
+		return pRagdollData;
+	}
+
+	return NULL;
+}
+
+bool CReplayRagdollCache::FindFrame( RagdollSimulationFrame_t*& pFrameOut, RagdollSimulationFrame_t*& pNextFrameOut,
+									 const RagdollSimulationData_t* pRagdollEntry, int nTick )
+{
+	// Look for the appropriate frame
+	FOR_EACH_LL( pRagdollEntry->m_lstFrames, j )
+	{
+		RagdollSimulationFrame_t* pFrame = pRagdollEntry->m_lstFrames[ j ];
+
+		// Get next frame if possible
+		int const nNext = pRagdollEntry->m_lstFrames.Next( j );
+		RagdollSimulationFrame_t* pNextFrame =
+			nNext == pRagdollEntry->m_lstFrames.InvalidIndex() ? NULL : pRagdollEntry->m_lstFrames[ nNext ];
+
+		// Use this frame?
+		if ( nTick >= pFrame->nTick &&
+			( (pNextFrame && nTick <= pNextFrame->nTick) || !pNextFrame ) )		// Use the last frame if the tick is past the range of frames -
+		{																		// this is the "sleeping" ragdoll frame
+			pFrameOut     = pFrame;
+			pNextFrameOut = pNextFrame;
+
+			return true;
+		}
+	}
+
+	pFrameOut     = NULL;
+	pNextFrameOut = NULL;
+
+	return false;
+}
+
+void CReplayRagdollCache::Think()
+{
+	// TODO: Add IsPlayingReplayDemo() to engine interface
+	/*
+	engine->Con_NPrintf( 8, "time: %d", engine->GetDemoPlaybackTick() );
+	FOR_EACH_LL( m_lstRagdolls, i )
+	{
+		engine->Con_NPrintf( 10 + i, "entity %d: start time=%d  duration=%d  num bones=%d", m_lstRagdolls[i]->m_nEntityIndex, m_lstRagdolls[i]->m_nStartTick, m_lstRagdolls[i]->m_nDuration, m_lstRagdolls[i]->m_nNumBones );
+	}
+	*/
+}
+
+//--------------------------------------------------------------------------------
+
+bool Replay_CacheRagdolls( const char* pFilename, int nStartTick )
+{
+	CReplayRagdollRecorder::Instance().CleanupStartupTicksAndDurations( nStartTick );
+	return CReplayRagdollRecorder::Instance().DumpRagdollsToDisk( pFilename );
+}
+
+#endif
\ No newline at end of file