//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============

//

// Purpose: 

//

// $NoKeywords: $

//=============================================================================



// Client side entity management functions



#include <memory.h>



#include "hud.h"

#include "cl_util.h"

#include "const.h"

#include "entity_types.h"

#include "studio_event.h" // def. of mstudioevent_t

#include "r_efx.h"

#include "event_api.h"

#include "pm_defs.h"

#include "pmtrace.h"	

#include "pm_shared.h"



#define DLLEXPORT __declspec( dllexport )



void Game_AddObjects( void );



extern vec3_t v_origin;



int g_iAlive = 1;



extern "C" 

{

	int DLLEXPORT HUD_AddEntity( int type, struct cl_entity_s *ent, const char *modelname );

	void DLLEXPORT HUD_CreateEntities( void );

	void DLLEXPORT HUD_StudioEvent( const struct mstudioevent_s *event, const struct cl_entity_s *entity );

	void DLLEXPORT HUD_TxferLocalOverrides( struct entity_state_s *state, const struct clientdata_s *client );

	void DLLEXPORT HUD_ProcessPlayerState( struct entity_state_s *dst, const struct entity_state_s *src );

	void 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 );

	void DLLEXPORT HUD_TempEntUpdate( double frametime, double client_time, double cl_gravity, struct tempent_s **ppTempEntFree, struct tempent_s **ppTempEntActive, int ( *Callback_AddVisibleEntity )( struct cl_entity_s *pEntity ), void ( *Callback_TempEntPlaySound )( struct tempent_s *pTemp, float damp ) );

	struct cl_entity_s DLLEXPORT *HUD_GetUserEntity( int index );

}



/*

========================

HUD_AddEntity

	Return 0 to filter entity from visible list for rendering

========================

*/

int DLLEXPORT HUD_AddEntity( int type, struct cl_entity_s *ent, const char *modelname )

{

	switch ( type )

	{

	case ET_NORMAL:

	case ET_PLAYER:

	case ET_BEAM:

	case ET_TEMPENTITY:

	case ET_FRAGMENTED:

	default:

		break;

	}

	// each frame every entity passes this function, so the overview hooks it to filter the overview entities

	// in spectator mode:

	// each frame every entity passes this function, so the overview hooks 

	// it to filter the overview entities



	if ( g_iUser1 )

	{

		gHUD.m_Spectator.AddOverviewEntity( type, ent, modelname );



		if ( (	g_iUser1 == OBS_IN_EYE || gHUD.m_Spectator.m_pip->value == INSET_IN_EYE ) &&

				ent->index == g_iUser2 )

			return 0;	// don't draw the player we are following in eye



	}



	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 DLLEXPORT HUD_TxferLocalOverrides( struct entity_state_s *state, const struct clientdata_s *client )

{

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



	// Spectator

	state->iuser1 = client->iuser1;

	state->iuser2 = client->iuser2;



	// Duck prevention

	state->iuser3 = client->iuser3;



	// Fire prevention

	state->iuser4 = client->iuser4;

}



/*

=========================

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 DLLEXPORT HUD_ProcessPlayerState( struct entity_state_s *dst, const struct entity_state_s *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;

	}

}



/*

=========================

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 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 )

{

	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;



	// Duck prevention

	pcd->iuser3 = ppcd->iuser3;



	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



	}



	// Fire prevention

	pcd->iuser4 = ppcd->iuser4;



	pcd->fuser2					= ppcd->fuser2;

	pcd->fuser3					= ppcd->fuser3;



	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 DLLEXPORT HUD_CreateEntities( void )

{

	// 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 DLLEXPORT HUD_StudioEvent( const struct mstudioevent_s *event, const struct cl_entity_s *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;

	default:

		break;

	}

}



/*

=================

CL_UpdateTEnts



Simulation and cleanup of temporary entities

=================

*/

void 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 ) )

{

	static int gTempEntFrame = 0;

	int			i;

	TEMPENTITY	*pTemp, *pnext, *pprev;

	float		freq, gravity, gravitySlow, life, fastFreq;



	// Nothing to simulate

	if ( !*ppTempEntActive )		

		return;



	// 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;



	// !!! 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;

	}



	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 );



				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;

			}

			

			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;

	}



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 DLLEXPORT *HUD_GetUserEntity( int 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

}



