// Client side entity management functions

#include <memory.h>

#include "hud.h"
#include "cl_util.h"
#include "common/const.h"
#include "common/entity_types.h"
#include "common/studio_event.h" // def. of mstudioevent_t
#include "common/r_efx.h"
#include "common/event_api.h"
#include "pm_shared/pm_defs.h"
#include "common/pmtrace.h"	
#include "pm_shared/pm_shared.h"
#include "mod/AvHParticleSystemManager.h"
#include "mod/AvHSpecials.h"

#include "engine/APIProxy.h"
#include "Exports.h"

void Game_AddObjects( void );

extern vec3_t v_origin;
double gClientTimeLastUpdate;
int g_iAlive = 1;

bool gTempEntClearAllFlag = false;

/*
========================
HUD_AddEntity
	Return 0 to filter entity from visible list for rendering
========================
*/
int CL_DLLEXPORT HUD_AddEntity( int type, struct cl_entity_s *ent, const char *modelname )
{
	RecClAddEntity(type, ent, modelname);

	gHUD.ClientProcessEntity(&ent->curstate);

	// Particle entities have a model so they will be forced through this function,
	// but we don't want to draw them.
	int theSpecialState = ent->curstate.iuser3;
	if( (theSpecialState == AVH_USER3_PARTICLE_ON) ||
		(theSpecialState == AVH_USER3_PARTICLE_OFF) ||
		(theSpecialState == AVH_USER3_AUDIO_ON) ||
		(theSpecialState == AVH_USER3_AUDIO_OFF) ||
		(theSpecialState == AVH_USER3_NOBUILD))
	{
		return 0;
	}

	switch ( type )
	{
	case ET_NORMAL:
	case ET_PLAYER:
	case ET_BEAM:
	case ET_TEMPENTITY:
	case ET_FRAGMENTED:
	default:
		break;
	}

	if ( g_iUser1 == OBS_IN_EYE  && ent->index == g_iUser2 )
	{
		// Don't draw the player we are following in eye
        return 0;
	}
    
	return 1;

}

/*
=========================
HUD_TxferLocalOverrides

The server sends us our origin with extra precision as part of the clientdata structure, not during the normal
playerstate update in entity_state_t.  In order for these overrides to eventually get to the appropriate playerstate
structure, we need to copy them into the state structure at this point.
=========================
*/
void CL_DLLEXPORT HUD_TxferLocalOverrides( struct entity_state_s *state, const struct clientdata_s *client )
{
	RecClTxferLocalOverrides(state, client);

	VectorCopy( client->origin, state->origin );

	// Spectator
	state->iuser1 = client->iuser1;
	state->iuser2 = client->iuser2;
	state->iuser3 = client->iuser3;
	state->iuser4 = client->iuser4;

	state->fuser1 = client->fuser1;
	state->fuser2 = client->fuser2;
	state->fuser3 = client->fuser3;
	state->fuser4 = client->fuser4;

	state->vuser1 = client->vuser1;
	//state->vuser2 = client->vuser2;
	//state->vuser3 = client->vuser3;
	state->vuser4 = client->vuser4;
}

/*
=========================
HUD_ProcessPlayerState

We have received entity_state_t for this player over the network.  We need to copy appropriate fields to the
playerstate structure
=========================
*/
void CL_DLLEXPORT HUD_ProcessPlayerState( struct entity_state_s *dst, const struct entity_state_s *src )
{
	RecClProcessPlayerState(dst, src);

	// Copy in network data
	VectorCopy( src->origin, dst->origin );
	VectorCopy( src->angles, dst->angles );

	VectorCopy( src->velocity, dst->velocity );

	dst->frame					= src->frame;
	dst->modelindex				= src->modelindex;
	dst->skin					= src->skin;
	dst->effects				= src->effects;
	dst->weaponmodel			= src->weaponmodel;
	dst->movetype				= src->movetype;
	dst->sequence				= src->sequence;
	dst->animtime				= src->animtime;
	
	dst->solid					= src->solid;
	
	dst->rendermode				= src->rendermode;
	dst->renderamt				= src->renderamt;	
	dst->rendercolor.r			= src->rendercolor.r;
	dst->rendercolor.g			= src->rendercolor.g;
	dst->rendercolor.b			= src->rendercolor.b;
	dst->renderfx				= src->renderfx;

	dst->framerate				= src->framerate;
	dst->body					= src->body;

	memcpy( &dst->controller[0], &src->controller[0], 4 * sizeof( byte ) );
	memcpy( &dst->blending[0], &src->blending[0], 2 * sizeof( byte ) );

	VectorCopy( src->basevelocity, dst->basevelocity );

	dst->friction				= src->friction;
	dst->gravity				= src->gravity;
	dst->gaitsequence			= src->gaitsequence;
	dst->spectator				= src->spectator;
	dst->usehull				= src->usehull;
	dst->playerclass			= src->playerclass;
	dst->team					= src->team;
	dst->colormap				= src->colormap;
	
	// Save off some data so other areas of the Client DLL can get to it
	cl_entity_t *player = gEngfuncs.GetLocalPlayer();	// Get the local player's index
	if ( dst->number == player->index )
	{
		g_iPlayerClass = dst->playerclass;
		g_iTeamNumber = dst->team;

		g_iUser1 = src->iuser1;
		g_iUser2 = src->iuser2;
		g_iUser3 = src->iuser3;

	}
	
	// AvH
	// Copy special movement mode...is this needed?
	dst->iuser1 = src->iuser1;
	dst->iuser2 = src->iuser2;
	dst->iuser3 = src->iuser3;
	dst->iuser4 = src->iuser4;

	dst->fuser1 = src->fuser1;
	dst->fuser2 = src->fuser2;
	dst->fuser3 = src->fuser3;
	dst->fuser4 = src->fuser4;

	dst->vuser1 = src->vuser1;
	//dst->vuser2 = src->vuser2;
	//dst->vuser3 = src->vuser3;
	dst->vuser4 = src->vuser4;
}

/*
=========================
HUD_TxferPredictionData

Because we can predict an arbitrary number of frames before the server responds with an update, we need to be able to copy client side prediction data in
 from the state that the server ack'd receiving, which can be anywhere along the predicted frame path ( i.e., we could predict 20 frames into the future and the server ack's
 up through 10 of those frames, so we need to copy persistent client-side only state from the 10th predicted frame to the slot the server
 update is occupying.
=========================
*/
void CL_DLLEXPORT HUD_TxferPredictionData ( struct entity_state_s *ps, const struct entity_state_s *pps, struct clientdata_s *pcd, const struct clientdata_s *ppcd, struct weapon_data_s *wd, const struct weapon_data_s *pwd )
{
	RecClTxferPredictionData(ps, pps, pcd, ppcd, wd, pwd);

	ps->oldbuttons				= pps->oldbuttons;
	ps->flFallVelocity			= pps->flFallVelocity;
	ps->iStepLeft				= pps->iStepLeft;
	ps->playerclass				= pps->playerclass;

	pcd->viewmodel				= ppcd->viewmodel;
	pcd->m_iId					= ppcd->m_iId;
	pcd->ammo_shells			= ppcd->ammo_shells;
	pcd->ammo_nails				= ppcd->ammo_nails;
	pcd->ammo_cells				= ppcd->ammo_cells;
	pcd->ammo_rockets			= ppcd->ammo_rockets;
	pcd->m_flNextAttack			= ppcd->m_flNextAttack;
	pcd->fov					= ppcd->fov;
	pcd->weaponanim				= ppcd->weaponanim;
	pcd->tfstate				= ppcd->tfstate;
	pcd->maxspeed				= ppcd->maxspeed;

	pcd->deadflag				= ppcd->deadflag;

	// Spectating or not dead == get control over view angles.
	g_iAlive = ( ppcd->iuser1 || ( pcd->deadflag == DEAD_NO ) ) ? 1 : 0;

	// Spectator
	pcd->iuser1					= ppcd->iuser1;
	pcd->iuser2					= ppcd->iuser2;
	pcd->iuser3					= ppcd->iuser3;
	pcd->iuser4					= ppcd->iuser4;

	pcd->fuser1					= ppcd->fuser1;
	pcd->fuser2					= ppcd->fuser2;
	pcd->fuser3					= ppcd->fuser3;
	pcd->fuser4					= ppcd->fuser4;

	if( gEngfuncs.IsSpectateOnly() )
	{
		// in specator mode we tell the engine who we want to spectate and how
		// iuser3 is not used for duck prevention (since the spectator can't duck at all)
		pcd->iuser1 = g_iUser1;	// observer mode
		pcd->iuser2 = g_iUser2; // first target
		pcd->iuser3 = g_iUser3; // second target

	}

	VectorCopy( ppcd->vuser1, pcd->vuser1 );
	//VectorCopy( ppcd->vuser2, pcd->vuser2 );
	//VectorCopy( ppcd->vuser3, pcd->vuser3 );
	VectorCopy( ppcd->vuser4, pcd->vuser4 );

	memcpy( wd, pwd, 32 * sizeof( weapon_data_t ) );
}

/*
//#define TEST_IT
#if defined( TEST_IT )

cl_entity_t mymodel[9];

void MoveModel( void )
{
	cl_entity_t *player;
	int i, j;
	int modelindex;
	struct model_s *mod;

	// Load it up with some bogus data
	player = gEngfuncs.GetLocalPlayer();
	if ( !player )
		return;

	mod = gEngfuncs.CL_LoadModel( "models/sentry3.mdl", &modelindex );
	for ( i = 0; i < 3; i++ )
	{
		for ( j = 0; j < 3; j++ )
		{
			// Don't draw over ourself...
			if ( ( i == 1 ) && ( j == 1 ) )
				continue;

			mymodel[ i * 3 + j ] = *player;

			mymodel[ i * 3 + j ].player = 0;

			mymodel[ i * 3 + j ].model = mod;
			mymodel[ i * 3 + j ].curstate.modelindex = modelindex;
		
				// Move it out a bit
			mymodel[ i * 3 + j ].origin[0] = player->origin[0] + 50 * ( 1 - i );
			mymodel[ i * 3 + j ].origin[1] = player->origin[1] + 50 * ( 1 - j );

			gEngfuncs.CL_CreateVisibleEntity( ET_NORMAL, &mymodel[i*3+j] );
		}
	}

}

#endif

//#define TRACE_TEST
#if defined( TRACE_TEST )

extern int hitent;

cl_entity_t hit;

void TraceModel( void )
{
	cl_entity_t *ent;

	if ( hitent <= 0 )
		return;

	// Load it up with some bogus data
	ent = gEngfuncs.GetEntityByIndex( hitent );
	if ( !ent )
		return;

	hit = *ent;
	//hit.curstate.rendermode = kRenderTransTexture;
	//hit.curstate.renderfx = kRenderFxGlowShell;
	//hit.curstate.renderamt = 100;

	hit.origin[2] += 40;

	gEngfuncs.CL_CreateVisibleEntity( ET_NORMAL, &hit );
}

#endif
*/

/*
void ParticleCallback( struct particle_s *particle, float frametime )
{
	int i;

	for ( i = 0; i < 3; i++ )
	{
		particle->org[ i ] += particle->vel[ i ] * frametime;
	}
}

cvar_t *color = NULL;
void Particles( void )
{
	static float lasttime;
	float curtime;
	
	curtime = gEngfuncs.GetClientTime();

	if ( ( curtime - lasttime ) < 2.0 )
		return;

	if ( !color )
	{
		color = gEngfuncs.pfnRegisterVariable ( "color","255 0 0", 0 );
	}

	lasttime = curtime;

	// Create a few particles
	particle_t *p;
	int i, j;

	for ( i = 0; i < 1000; i++ )
	{
		int r, g, b;
		p = gEngfuncs.pEfxAPI->R_AllocParticle( ParticleCallback );
		if ( !p )
			break;

		for ( j = 0; j < 3; j++ )
		{
			p->org[ j ] = v_origin[ j ] + gEngfuncs.pfnRandomFloat( -32.0, 32.0 );;
			p->vel[ j ] = gEngfuncs.pfnRandomFloat( -100.0, 100.0 );
		}

		if ( color )
		{
			sscanf( color->string, "%i %i %i", &r, &g, &b );
		}
		else
		{
			r = 192;
			g = 0;
			b = 0;
		}

		p->color = 	gEngfuncs.pEfxAPI->R_LookupColor( r, g, b );
		gEngfuncs.pEfxAPI->R_GetPackedColor( &p->packedColor, p->color );

		// p->die is set to current time so all you have to do is add an additional time to it
		p->die += 3.0;
	}
}
*/

/*
void TempEntCallback ( struct tempent_s *ent, float frametime, float currenttime )
{
	int i;

	for ( i = 0; i < 3; i++ )
	{
		ent->entity.curstate.origin[ i ] += ent->entity.baseline.origin[ i ] * frametime;
	}
}

void TempEnts( void )
{
	static float lasttime;
	float curtime;
	
	curtime = gEngfuncs.GetClientTime();

	if ( ( curtime - lasttime ) < 10.0 )
		return;

	lasttime = curtime;

	TEMPENTITY *p;
	int i, j;
	struct model_s *mod;
	vec3_t origin;
	int index;

	mod = gEngfuncs.CL_LoadModel( "sprites/laserdot.spr", &index );

	for ( i = 0; i < 100; i++ )
	{
		for ( j = 0; j < 3; j++ )
		{
			origin[ j ] = v_origin[ j ];
			if ( j != 2 )
			{
				origin[ j ] += 75;
			}
		}

		p = gEngfuncs.pEfxAPI->CL_TentEntAllocCustom( (float *)&origin, mod, 0, TempEntCallback );
		if ( !p )
			break;

		for ( j = 0; j < 3; j++ )
		{
			p->entity.curstate.origin[ j ] = origin[ j ];

			// Store velocity in baseline origin
			p->entity.baseline.origin[ j ] = gEngfuncs.pfnRandomFloat( -100, 100 );
		}

		// p->die is set to current time so all you have to do is add an additional time to it
		p->die += 10.0;
	}
}
*/

#if defined( BEAM_TEST )
// Note can't index beam[ 0 ] in Beam callback, so don't use that index
// Room for 1 beam ( 0 can't be used )
static cl_entity_t beams[ 2 ];

void BeamEndModel( void )
{
	cl_entity_t *player, *model;
	int modelindex;
	struct model_s *mod;

	// Load it up with some bogus data
	player = gEngfuncs.GetLocalPlayer();
	if ( !player )
		return;

	mod = gEngfuncs.CL_LoadModel( "models/sentry3.mdl", &modelindex );
	if ( !mod )
		return;

	// Slot 1
	model = &beams[ 1 ];

	*model = *player;
	model->player = 0;
	model->model = mod;
	model->curstate.modelindex = modelindex;
		
	// Move it out a bit
	model->origin[0] = player->origin[0] - 100;
	model->origin[1] = player->origin[1];

	model->attachment[0] = model->origin;
	model->attachment[1] = model->origin;
	model->attachment[2] = model->origin;
	model->attachment[3] = model->origin;

	gEngfuncs.CL_CreateVisibleEntity( ET_NORMAL, model );
}

void Beams( void )
{
	static float lasttime;
	float curtime;
	struct model_s *mod;
	int index;

	BeamEndModel();
	
	curtime = gEngfuncs.GetClientTime();
	float end[ 3 ];

	if ( ( curtime - lasttime ) < 10.0 )
		return;

	mod = gEngfuncs.CL_LoadModel( "sprites/laserbeam.spr", &index );
	if ( !mod )
		return;

	lasttime = curtime;

	end [ 0 ] = v_origin.x + 100;
	end [ 1 ] = v_origin.y + 100;
	end [ 2 ] = v_origin.z;

	BEAM *p1;
	p1 = gEngfuncs.pEfxAPI->R_BeamEntPoint( -1, end, index,
		10.0, 2.0, 0.3, 1.0, 5.0, 0.0, 1.0, 1.0, 1.0, 1.0 );
}
#endif

/*
=========================
HUD_CreateEntities
	
Gives us a chance to add additional entities to the render this frame
=========================
*/
void CL_DLLEXPORT HUD_CreateEntities( void )
{
	RecClCreateEntities();

	// e.g., create a persistent cl_entity_t somewhere.
	// Load an appropriate model into it ( gEngfuncs.CL_LoadModel )
	// Call gEngfuncs.CL_CreateVisibleEntity to add it to the visedicts list
/*
#if defined( TEST_IT )
	MoveModel();
#endif

#if defined( TRACE_TEST )
	TraceModel();
#endif
*/
/*
	Particles();
*/
/*
	TempEnts();
*/

#if defined( BEAM_TEST )
	Beams();
#endif

	// Add in any game specific objects
	Game_AddObjects();

	GetClientVoiceMgr()->CreateEntities();
}

/*
=========================
HUD_StudioEvent

The entity's studio model description indicated an event was
fired during this frame, handle the event by it's tag ( e.g., muzzleflash, sound )
=========================
*/
void CL_DLLEXPORT HUD_StudioEvent( const struct mstudioevent_s *event, const struct cl_entity_s *entity )
{
	RecClStudioEvent(event, entity);

	switch( event->event )
	{
	case 5001:
		gEngfuncs.pEfxAPI->R_MuzzleFlash( (float *)&entity->attachment[0], atoi( event->options) );
		break;
	case 5011:
		gEngfuncs.pEfxAPI->R_MuzzleFlash( (float *)&entity->attachment[1], atoi( event->options) );
		break;
	case 5021:
		gEngfuncs.pEfxAPI->R_MuzzleFlash( (float *)&entity->attachment[2], atoi( event->options) );
		break;
	case 5031:
		gEngfuncs.pEfxAPI->R_MuzzleFlash( (float *)&entity->attachment[3], atoi( event->options) );
		break;
	case 5002:
		gEngfuncs.pEfxAPI->R_SparkEffect( (float *)&entity->attachment[0], atoi( event->options), -100, 100 );
		break;
	// Client side sound
	case 5004:		
		gEngfuncs.pfnPlaySoundByNameAtLocation( (char *)event->options, 1.0, (float *)&entity->attachment[0] );
		break;

	// Particles!
	case 7000:
		AvHParticleSystemManager::Instance()->CreateParticleSystem(string(event->options), entity->attachment[0]);
		break;

	case 7010:
		AvHParticleSystemManager::Instance()->CreateParticleSystem(string(event->options), entity->attachment[1]);
		break;
		
	case 7020:
		AvHParticleSystemManager::Instance()->CreateParticleSystem(string(event->options), entity->attachment[2]);
		break;
		
	case 7030:
		AvHParticleSystemManager::Instance()->CreateParticleSystem(string(event->options), entity->attachment[3]);
		break;
		
	default:
		break;
	}
}

/*
=================
CL_UpdateTEnts

Simulation and cleanup of temporary entities
=================
*/
void CL_DLLEXPORT HUD_TempEntUpdate (
	double frametime,   // Simulation time
	double client_time, // Absolute time on client
	double cl_gravity,  // True gravity on client
	TEMPENTITY **ppTempEntFree,   // List of freed temporary ents
	TEMPENTITY **ppTempEntActive, // List 
	int		( *Callback_AddVisibleEntity )( cl_entity_t *pEntity ),
	void	( *Callback_TempEntPlaySound )( TEMPENTITY *pTemp, float damp ) )
{
	RecClTempEntUpdate(frametime, client_time, cl_gravity, ppTempEntFree, ppTempEntActive, Callback_AddVisibleEntity, Callback_TempEntPlaySound);

	static int gTempEntFrame = 0;
	int			i;
	TEMPENTITY	*pTemp, *pnext, *pprev;
	float		freq, gravity, gravitySlow, life, fastFreq;

	// don't simulate when we're paused
	if(gClientTimeLastUpdate != client_time)
	{
		gClientTimeLastUpdate = client_time;
		
		// Nothing to simulate
		if ( *ppTempEntActive )		
		{
			// in order to have tents collide with players, we have to run the player prediction code so
			// that the client has the player list. We run this code once when we detect any COLLIDEALL 
			// tent, then set this BOOL to true so the code doesn't get run again if there's more than
			// one COLLIDEALL ent for this update. (often are).
			gEngfuncs.pEventAPI->EV_SetUpPlayerPrediction( false, true );
			
			// Store off the old count
			gEngfuncs.pEventAPI->EV_PushPMStates();
			
			// Now add in all of the players.
			gEngfuncs.pEventAPI->EV_SetSolidPlayers ( -1 );	
			
			// !!!BUGBUG	-- This needs to be time based
			gTempEntFrame = (gTempEntFrame+1) & 31;
			
			pTemp = *ppTempEntActive;

			bool theIsDone = false;
			
			// !!! Don't simulate while paused....  This is sort of a hack, revisit.
			if ( frametime <= 0 )
			{
				while ( pTemp )
				{
					if ( !(pTemp->flags & FTENT_NOMODEL ) )
					{
						Callback_AddVisibleEntity( &pTemp->entity );
					}
					pTemp = pTemp->next;
				}
				//goto finish;
				
				theIsDone = true;
			}

			if(!theIsDone)
			{
				pprev = NULL;
				freq = client_time * 0.01;
				fastFreq = client_time * 5.5;
				gravity = -frametime * cl_gravity;
				gravitySlow = gravity * 0.5;
				
				while ( pTemp )
				{
					int active;
					
					active = 1;
					
					life = pTemp->die - client_time;
					pnext = pTemp->next;
					if ( life < 0 )
					{
						if ( pTemp->flags & FTENT_FADEOUT )
						{
							if (pTemp->entity.curstate.rendermode == kRenderNormal)
								pTemp->entity.curstate.rendermode = kRenderTransTexture;
							pTemp->entity.curstate.renderamt = pTemp->entity.baseline.renderamt * ( 1 + life * pTemp->fadeSpeed );
							if ( pTemp->entity.curstate.renderamt <= 0 )
								active = 0;
							
						}
						else 
							active = 0;
					}
					if ( !active )		// Kill it
					{
						pTemp->next = *ppTempEntFree;
						*ppTempEntFree = pTemp;
						if ( !pprev )	// Deleting at head of list
							*ppTempEntActive = pnext;
						else
							pprev->next = pnext;
					}
					else
					{
						pprev = pTemp;
						
						VectorCopy( pTemp->entity.origin, pTemp->entity.prevstate.origin );
						
						if ( pTemp->flags & FTENT_SPARKSHOWER )
						{
							// Adjust speed if it's time
							// Scale is next think time
							if ( client_time > pTemp->entity.baseline.scale )
							{
								// Show Sparks
								gEngfuncs.pEfxAPI->R_SparkEffect( pTemp->entity.origin, 8, -200, 200 );
								
								// Reduce life
								pTemp->entity.baseline.framerate -= 0.1;
								
								if ( pTemp->entity.baseline.framerate <= 0.0 )
								{
									pTemp->die = client_time;
								}
								else
								{
									// So it will die no matter what
									pTemp->die = client_time + 0.5;
									
									// Next think
									pTemp->entity.baseline.scale = client_time + 0.1;
								}
							}
						}
						else if ( pTemp->flags & FTENT_PLYRATTACHMENT )
						{
							cl_entity_t *pClient;
							
							pClient = gEngfuncs.GetEntityByIndex( pTemp->clientIndex );
							
							VectorAdd( pClient->origin, pTemp->tentOffset, pTemp->entity.origin );
						}
						else if ( pTemp->flags & FTENT_SINEWAVE )
						{
							pTemp->x += pTemp->entity.baseline.origin[0] * frametime;
							pTemp->y += pTemp->entity.baseline.origin[1] * frametime;
							
							pTemp->entity.origin[0] = pTemp->x + sin( pTemp->entity.baseline.origin[2] + client_time * pTemp->entity.prevstate.frame ) * (10*pTemp->entity.curstate.framerate);
							pTemp->entity.origin[1] = pTemp->y + sin( pTemp->entity.baseline.origin[2] + fastFreq + 0.7 ) * (8*pTemp->entity.curstate.framerate);
							pTemp->entity.origin[2] += pTemp->entity.baseline.origin[2] * frametime;
						}
						else if ( pTemp->flags & FTENT_SPIRAL )
						{
							float s, c;
							s = sin( pTemp->entity.baseline.origin[2] + fastFreq );
							c = cos( pTemp->entity.baseline.origin[2] + fastFreq );
#pragma warning(push)
#pragma warning(disable: 311)							
							pTemp->entity.origin[0] += pTemp->entity.baseline.origin[0] * frametime + 8 * sin( client_time * 20 + (int)pTemp );
							pTemp->entity.origin[1] += pTemp->entity.baseline.origin[1] * frametime + 4 * sin( client_time * 30 + (int)pTemp );
							pTemp->entity.origin[2] += pTemp->entity.baseline.origin[2] * frametime;
#pragma warning(pop)
						}
						
						else 
						{
							for ( i = 0; i < 3; i++ ) 
								pTemp->entity.origin[i] += pTemp->entity.baseline.origin[i] * frametime;
						}
						
						if ( pTemp->flags & FTENT_SPRANIMATE )
						{
							pTemp->entity.curstate.frame += frametime * pTemp->entity.curstate.framerate;
							if ( pTemp->entity.curstate.frame >= pTemp->frameMax )
							{
								pTemp->entity.curstate.frame = pTemp->entity.curstate.frame - (int)(pTemp->entity.curstate.frame);
								
								if ( !(pTemp->flags & FTENT_SPRANIMATELOOP) )
								{
									// this animating sprite isn't set to loop, so destroy it.
									pTemp->die = client_time;
									pTemp = pnext;
									continue;
								}
							}
						}
						else if ( pTemp->flags & FTENT_SPRCYCLE )
						{
							pTemp->entity.curstate.frame += frametime * 10;
							if ( pTemp->entity.curstate.frame >= pTemp->frameMax )
							{
								pTemp->entity.curstate.frame = pTemp->entity.curstate.frame - (int)(pTemp->entity.curstate.frame);
							}
						}
						// Experiment
#if 0
						if ( pTemp->flags & FTENT_SCALE )
							pTemp->entity.curstate.framerate += 20.0 * (frametime / pTemp->entity.curstate.framerate);
#endif
						
						if ( pTemp->flags & FTENT_ROTATE )
						{
							pTemp->entity.angles[0] += pTemp->entity.baseline.angles[0] * frametime;
							pTemp->entity.angles[1] += pTemp->entity.baseline.angles[1] * frametime;
							pTemp->entity.angles[2] += pTemp->entity.baseline.angles[2] * frametime;
							
							VectorCopy( pTemp->entity.angles, pTemp->entity.latched.prevangles );
						}
						
						if ( pTemp->flags & (FTENT_COLLIDEALL | FTENT_COLLIDEWORLD) )
						{
							vec3_t	traceNormal;
							float	traceFraction = 1;
							
							if ( pTemp->flags & FTENT_COLLIDEALL )
							{
								pmtrace_t pmtrace;
								physent_t *pe;
								
								gEngfuncs.pEventAPI->EV_SetTraceHull( 2 );
								
								gEngfuncs.pEventAPI->EV_PlayerTrace( pTemp->entity.prevstate.origin, pTemp->entity.origin, PM_STUDIO_BOX, -1, &pmtrace );
								
								
								if ( pmtrace.fraction != 1 )
								{
									pe = gEngfuncs.pEventAPI->EV_GetPhysent( pmtrace.ent );
									
									if ( !pmtrace.ent || ( pe->info != pTemp->clientIndex ) )
									{
										traceFraction = pmtrace.fraction;
										VectorCopy( pmtrace.plane.normal, traceNormal );
										
										if ( pTemp->hitcallback )
										{
											(*pTemp->hitcallback)( pTemp, &pmtrace );
										}
									}
								}
							}
							else if ( pTemp->flags & FTENT_COLLIDEWORLD )
							{
								pmtrace_t pmtrace;
								
								gEngfuncs.pEventAPI->EV_SetTraceHull( 2 );
								
								gEngfuncs.pEventAPI->EV_PlayerTrace( pTemp->entity.prevstate.origin, pTemp->entity.origin, PM_STUDIO_BOX | PM_WORLD_ONLY, -1, &pmtrace );					
								
								if ( pmtrace.fraction != 1 )
								{
									traceFraction = pmtrace.fraction;
									VectorCopy( pmtrace.plane.normal, traceNormal );
									
									if ( pTemp->flags & FTENT_SPARKSHOWER )
									{
										// Chop spark speeds a bit more
										//
										VectorScale( pTemp->entity.baseline.origin, 0.6, pTemp->entity.baseline.origin );
										
										if ( Length( pTemp->entity.baseline.origin ) < 10 )
										{
											pTemp->entity.baseline.framerate = 0.0;								
										}
									}
									
									if ( pTemp->hitcallback )
									{
										(*pTemp->hitcallback)( pTemp, &pmtrace );
									}
								}
							}
							
							if ( traceFraction != 1 )	// Decent collision now, and damping works
							{
								float  proj, damp;
								
								// Place at contact point
								VectorMA( pTemp->entity.prevstate.origin, traceFraction*frametime, pTemp->entity.baseline.origin, pTemp->entity.origin );
								// Damp velocity
								damp = pTemp->bounceFactor;
								if ( pTemp->flags & (FTENT_GRAVITY|FTENT_SLOWGRAVITY) )
								{
									damp *= 0.5;
									if ( traceNormal[2] > 0.9 )		// Hit floor?
									{
										if ( pTemp->entity.baseline.origin[2] <= 0 && pTemp->entity.baseline.origin[2] >= gravity*3 )
										{
											damp = 0;		// Stop
											pTemp->flags &= ~(FTENT_ROTATE|FTENT_GRAVITY|FTENT_SLOWGRAVITY|FTENT_COLLIDEWORLD|FTENT_SMOKETRAIL);
											pTemp->entity.angles[0] = 0;
											pTemp->entity.angles[2] = 0;
										}
									}
								}
								
								if (pTemp->hitSound)
								{
									Callback_TempEntPlaySound(pTemp, damp);
								}
								
								if (pTemp->flags & FTENT_COLLIDEKILL)
								{
									// die on impact
									pTemp->flags &= ~FTENT_FADEOUT;	
									pTemp->die = client_time;			
								}
								else
								{
									// Reflect velocity
									if ( damp != 0 )
									{
										proj = DotProduct( pTemp->entity.baseline.origin, traceNormal );
										VectorMA( pTemp->entity.baseline.origin, -proj*2, traceNormal, pTemp->entity.baseline.origin );
										// Reflect rotation (fake)
										
										pTemp->entity.angles[1] = -pTemp->entity.angles[1];
									}
									
									if ( damp != 1 )
									{
										
										VectorScale( pTemp->entity.baseline.origin, damp, pTemp->entity.baseline.origin );
										VectorScale( pTemp->entity.angles, 0.9, pTemp->entity.angles );
									}
								}
							}
							}
							
							
							if ( (pTemp->flags & FTENT_FLICKER) && gTempEntFrame == pTemp->entity.curstate.effects )
							{
								dlight_t *dl = gEngfuncs.pEfxAPI->CL_AllocDlight (0);
								VectorCopy (pTemp->entity.origin, dl->origin);
								dl->radius = 60;
								dl->color.r = 255;
								dl->color.g = 120;
								dl->color.b = 0;
								dl->die = client_time + 0.01;
							}
							
							if ( pTemp->flags & FTENT_SMOKETRAIL )
							{
								gEngfuncs.pEfxAPI->R_RocketTrail (pTemp->entity.prevstate.origin, pTemp->entity.origin, 1);
							}
							
							if ( pTemp->flags & FTENT_GRAVITY )
								pTemp->entity.baseline.origin[2] += gravity;
							else if ( pTemp->flags & FTENT_SLOWGRAVITY )
								pTemp->entity.baseline.origin[2] += gravitySlow;
							
							if ( pTemp->flags & FTENT_CLIENTCUSTOM )
							{
								if ( pTemp->callback )
								{
									( *pTemp->callback )( pTemp, frametime, client_time );
								}
							}
							
							// Cull to PVS (not frustum cull, just PVS)
							if ( !(pTemp->flags & FTENT_NOMODEL ) )
							{
								if ( !Callback_AddVisibleEntity( &pTemp->entity ) )
								{
									if ( !(pTemp->flags & FTENT_PERSIST) ) 
									{
										pTemp->die = client_time;			// If we can't draw it this frame, just dump it.
										pTemp->flags &= ~FTENT_FADEOUT;	// Don't fade out, just die
									}
								}
							}
					}
					pTemp = pnext;
				}
			}

			// Restore state info
			gEngfuncs.pEventAPI->EV_PopPMStates();
		}
	}

//finish:
//	// Restore state info
//	gEngfuncs.pEventAPI->EV_PopPMStates();
}

/*
=================
HUD_GetUserEntity

If you specify negative numbers for beam start and end point entities, then
  the engine will call back into this function requesting a pointer to a cl_entity_t 
  object that describes the entity to attach the beam onto.

Indices must start at 1, not zero.
=================
*/
cl_entity_t CL_DLLEXPORT *HUD_GetUserEntity( int index )
{
	RecClGetUserEntity(index);

#if defined( BEAM_TEST )
	// None by default, you would return a valic pointer if you create a client side
	//  beam and attach it to a client side entity.
	if ( index > 0 && index <= 1 )
	{
		return &beams[ index ];
	}
	else
	{
		return NULL;
	}
#else
	return NULL;
#endif
}