/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// cl_tent.c -- client side temporary entities

#include "quakedef.h"

int				num_temp_entities;
entity_t		cl_temp_entities[MAX_TEMP_ENTITIES];
beam_t			cl_beams[MAX_BEAMS];

#ifdef USEFPM
entity_FPM_t	cl_temp_entitiesFPM[MAX_TEMP_ENTITIES];
beam_FPM_t		cl_beamsFPM[MAX_BEAMS];
#endif

sfx_t			*cl_sfx_wizhit;
sfx_t			*cl_sfx_knighthit;
sfx_t			*cl_sfx_tink1;
sfx_t			*cl_sfx_ric1;
sfx_t			*cl_sfx_ric2;
sfx_t			*cl_sfx_ric3;
sfx_t			*cl_sfx_r_exp3;
#ifdef QUAKE2
sfx_t			*cl_sfx_imp;
sfx_t			*cl_sfx_rail;
#endif

/*
=================
CL_ParseTEnt
=================
*/
void CL_InitTEnts (void)
{
	cl_sfx_wizhit = S_PrecacheSound ("wizard/hit.wav");
	cl_sfx_knighthit = S_PrecacheSound ("hknight/hit.wav");
	cl_sfx_tink1 = S_PrecacheSound ("weapons/tink1.wav");
	cl_sfx_ric1 = S_PrecacheSound ("weapons/ric1.wav");
	cl_sfx_ric2 = S_PrecacheSound ("weapons/ric2.wav");
	cl_sfx_ric3 = S_PrecacheSound ("weapons/ric3.wav");
	cl_sfx_r_exp3 = S_PrecacheSound ("weapons/r_exp3.wav");
#ifdef QUAKE2
	cl_sfx_imp = S_PrecacheSound ("shambler/sattck1.wav");
	cl_sfx_rail = S_PrecacheSound ("weapons/lstart.wav");
#endif
}

/*
=================
CL_ParseBeam
=================
*/
void CL_ParseBeam (model_t *m)
{
	int		ent;
	vec3_t	start, end;
	beam_t	*b;
	int		i;

	ent = MSG_ReadShort ();

	start[0] = MSG_ReadCoord ();
	start[1] = MSG_ReadCoord ();
	start[2] = MSG_ReadCoord ();

	end[0] = MSG_ReadCoord ();
	end[1] = MSG_ReadCoord ();
	end[2] = MSG_ReadCoord ();

// override any beam with the same entity
	for (i=0, b=cl_beams ; i< MAX_BEAMS ; i++, b++)
		if (b->entity == ent)
		{
			b->entity = ent;
			b->model = m;
			b->endtime = (float)(cl.time + 0.2);
			VectorCopy (start, b->start);
			VectorCopy (end, b->end);
			return;
		}

// find a free beam
	for (i=0, b=cl_beams ; i< MAX_BEAMS ; i++, b++)
	{
		if (!b->model || b->endtime < cl.time)
		{
			b->entity = ent;
			b->model = m;
			b->endtime = (float)(cl.time + 0.2);
			VectorCopy (start, b->start);
			VectorCopy (end, b->end);
			return;
		}
	}
	Con_Printf ("beam list overflow!\n");
}

#ifdef USEFPM
void CL_ParseBeamFPM (model_FPM_t *m)
{
	int			ent;
	vec3_FPM_t	start, end;
	beam_FPM_t	*b;
	int			i;

	ent = MSG_ReadShort ();

	start[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
	start[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
	start[2] = FPM_FROMFLOAT(MSG_ReadCoord ());

	end[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
	end[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
	end[2] = FPM_FROMFLOAT(MSG_ReadCoord ());

// override any beam with the same entity
	for (i=0, b=cl_beamsFPM ; i< MAX_BEAMS ; i++, b++)
		if (b->entity == ent)
		{
			b->entity = ent;
			b->model = m;
			b->endtime = (float)(clFPM.time + 0.2);
			VectorCopy (start, b->start);
			VectorCopy (end, b->end);
			return;
		}

// find a free beam
	for (i=0, b=cl_beamsFPM ; i< MAX_BEAMS ; i++, b++)
	{
		if (!b->model || b->endtime < clFPM.time)
		{
			b->entity = ent;
			b->model = m;
			b->endtime = (float)(clFPM.time + 0.2);
			VectorCopy (start, b->start);
			VectorCopy (end, b->end);
			return;
		}
	}
	Con_Printf ("beam list overflow!\n");
}
#endif

/*
=================
CL_ParseTEnt
=================
*/
void CL_ParseTEnt (void)
{
	int		type;
	vec3_t	pos;
#ifdef QUAKE2
	vec3_t	endpos;
#endif
	dlight_t	*dl;
	int		rnd;
	int		colorStart, colorLength;

	type = MSG_ReadByte ();
	switch (type)
	{
	case TE_WIZSPIKE:			// spike hitting wall
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_RunParticleEffect (pos, vec3_origin, 20, 30);
		S_StartSound (-1, 0, cl_sfx_wizhit, pos, 1, 1);
		break;

	case TE_KNIGHTSPIKE:			// spike hitting wall
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_RunParticleEffect (pos, vec3_origin, 226, 20);
		S_StartSound (-1, 0, cl_sfx_knighthit, pos, 1, 1);
		break;

	case TE_SPIKE:			// spike hitting wall
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
#ifdef GLTEST
		Test_Spawn (pos);
#else
		R_RunParticleEffect (pos, vec3_origin, 0, 10);
#endif
		if ( rand() % 5 )
			S_StartSound (-1, 0, cl_sfx_tink1, pos, 1, 1);
		else
		{
			rnd = rand() & 3;
			if (rnd == 1)
				S_StartSound (-1, 0, cl_sfx_ric1, pos, 1, 1);
			else if (rnd == 2)
				S_StartSound (-1, 0, cl_sfx_ric2, pos, 1, 1);
			else
				S_StartSound (-1, 0, cl_sfx_ric3, pos, 1, 1);
		}
		break;
	case TE_SUPERSPIKE:			// super spike hitting wall
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_RunParticleEffect (pos, vec3_origin, 0, 20);

		if ( rand() % 5 )
			S_StartSound (-1, 0, cl_sfx_tink1, pos, 1, 1);
		else
		{
			rnd = rand() & 3;
			if (rnd == 1)
				S_StartSound (-1, 0, cl_sfx_ric1, pos, 1, 1);
			else if (rnd == 2)
				S_StartSound (-1, 0, cl_sfx_ric2, pos, 1, 1);
			else
				S_StartSound (-1, 0, cl_sfx_ric3, pos, 1, 1);
		}
		break;

	case TE_GUNSHOT:			// bullet hitting wall
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_RunParticleEffect (pos, vec3_origin, 0, 20);
		break;

	case TE_EXPLOSION:			// rocket explosion
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_ParticleExplosion (pos);
		dl = CL_AllocDlight (0);
		VectorCopy (pos, dl->origin);
		dl->radius = 350;
		dl->die = (float)(cl.time + 0.5);
		dl->decay = 300;
		S_StartSound (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

	case TE_TAREXPLOSION:			// tarbaby explosion
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_BlobExplosion (pos);

		S_StartSound (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

	case TE_LIGHTNING1:				// lightning bolts
		CL_ParseBeam (Mod_ForName("progs/bolt.mdl", true));
		break;

	case TE_LIGHTNING2:				// lightning bolts
		CL_ParseBeam (Mod_ForName("progs/bolt2.mdl", true));
		break;

	case TE_LIGHTNING3:				// lightning bolts
		CL_ParseBeam (Mod_ForName("progs/bolt3.mdl", true));
		break;

// PGM 01/21/97
	case TE_BEAM:				// grappling hook beam
		CL_ParseBeam (Mod_ForName("progs/beam.mdl", true));
		break;
// PGM 01/21/97

	case TE_LAVASPLASH:
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_LavaSplash (pos);
		break;

	case TE_TELEPORT:
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		R_TeleportSplash (pos);
		break;

	case TE_EXPLOSION2:				// color mapped explosion
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		colorStart = MSG_ReadByte ();
		colorLength = MSG_ReadByte ();
		R_ParticleExplosion2 (pos, colorStart, colorLength);
		dl = CL_AllocDlight (0);
		VectorCopy (pos, dl->origin);
		dl->radius = 350;
		dl->die = (float)(cl.time + 0.5);
		dl->decay = 300;
		S_StartSound (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

#ifdef QUAKE2
	case TE_IMPLOSION:
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		S_StartSound (-1, 0, cl_sfx_imp, pos, 1, 1);
		break;

	case TE_RAILTRAIL:
		pos[0] = MSG_ReadCoord ();
		pos[1] = MSG_ReadCoord ();
		pos[2] = MSG_ReadCoord ();
		endpos[0] = MSG_ReadCoord ();
		endpos[1] = MSG_ReadCoord ();
		endpos[2] = MSG_ReadCoord ();
		S_StartSound (-1, 0, cl_sfx_rail, pos, 1, 1);
		S_StartSound (-1, 1, cl_sfx_r_exp3, endpos, 1, 1);
		R_RocketTrail (pos, endpos, 0+128);
		R_ParticleExplosion (endpos);
		dl = CL_AllocDlight (-1);
		VectorCopy (endpos, dl->origin);
		dl->radius = 350;
		dl->die = cl.time + 0.5;
		dl->decay = 300;
		break;
#endif

	default:
		Sys_Error ("CL_ParseTEnt: bad type");
	}
}

#ifdef USEFPM
void CL_ParseTEntFPM (void)
{
	int				type;
	vec3_FPM_t		pos;
#ifdef QUAKE2
	vec3_FPM_t		endpos;
#endif
	dlight_FPM_t	*dl;
	int				rnd;
	int				colorStart, colorLength;

	type = MSG_ReadByte ();
	switch (type)
	{
	case TE_WIZSPIKE:			// spike hitting wall
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_RunParticleEffectFPM (pos, vec3_originFPM, 20, 30);
		S_StartSoundFPM (-1, 0, cl_sfx_wizhit, pos, 1, 1);
		break;

	case TE_KNIGHTSPIKE:			// spike hitting wall
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_RunParticleEffectFPM (pos, vec3_originFPM, 226, 20);
		S_StartSoundFPM (-1, 0, cl_sfx_knighthit, pos, 1, 1);
		break;

	case TE_SPIKE:			// spike hitting wall
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
#ifdef GLTEST
		Test_Spawn (pos);
#else
		R_RunParticleEffectFPM (pos, vec3_originFPM, 0, 10);
#endif
		if ( rand() % 5 )
			S_StartSoundFPM (-1, 0, cl_sfx_tink1, pos, 1, 1);
		else
		{
			rnd = rand() & 3;
			if (rnd == 1)
				S_StartSoundFPM (-1, 0, cl_sfx_ric1, pos, 1, 1);
			else if (rnd == 2)
				S_StartSoundFPM (-1, 0, cl_sfx_ric2, pos, 1, 1);
			else
				S_StartSoundFPM (-1, 0, cl_sfx_ric3, pos, 1, 1);
		}
		break;
	case TE_SUPERSPIKE:			// super spike hitting wall
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_RunParticleEffectFPM (pos, vec3_originFPM, 0, 20);

		if ( rand() % 5 )
			S_StartSoundFPM (-1, 0, cl_sfx_tink1, pos, 1, 1);
		else
		{
			rnd = rand() & 3;
			if (rnd == 1)
				S_StartSoundFPM (-1, 0, cl_sfx_ric1, pos, 1, 1);
			else if (rnd == 2)
				S_StartSoundFPM (-1, 0, cl_sfx_ric2, pos, 1, 1);
			else
				S_StartSoundFPM (-1, 0, cl_sfx_ric3, pos, 1, 1);
		}
		break;

	case TE_GUNSHOT:			// bullet hitting wall
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_RunParticleEffectFPM (pos, vec3_originFPM, 0, 20);
		break;

	case TE_EXPLOSION:			// rocket explosion
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_ParticleExplosionFPM (pos);
		dl = CL_AllocDlightFPM (0);
		VectorCopy (pos, dl->origin);
		dl->radius = 350;
		dl->die = FPM_ADD(FPM_FROMFLOAT(cl.time), FPM_FROMFLOAT(0.5));
		dl->decay = 300;
		S_StartSoundFPM (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

	case TE_TAREXPLOSION:			// tarbaby explosion
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_BlobExplosionFPM (pos);

		S_StartSoundFPM (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

	case TE_LIGHTNING1:				// lightning bolts
		CL_ParseBeamFPM (Mod_ForNameFPM("progs/bolt.mdl", true));
		break;

	case TE_LIGHTNING2:				// lightning bolts
		CL_ParseBeamFPM (Mod_ForNameFPM("progs/bolt2.mdl", true));
		break;

	case TE_LIGHTNING3:				// lightning bolts
		CL_ParseBeamFPM (Mod_ForNameFPM("progs/bolt3.mdl", true));
		break;

// PGM 01/21/97
	case TE_BEAM:				// grappling hook beam
		CL_ParseBeamFPM (Mod_ForNameFPM("progs/beam.mdl", true));
		break;
// PGM 01/21/97

	case TE_LAVASPLASH:
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_LavaSplashFPM (pos);
		break;

	case TE_TELEPORT:
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		R_TeleportSplashFPM (pos);
		break;

	case TE_EXPLOSION2:				// color mapped explosion
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		colorStart = MSG_ReadByte ();
		colorLength = MSG_ReadByte ();
		R_ParticleExplosion2FPM (pos, colorStart, colorLength);
		dl = CL_AllocDlightFPM (0);
		VectorCopy (pos, dl->origin);
		dl->radius = 350;
		dl->die = FPM_ADD(FPM_FROMFLOAT(cl.time), FPM_FROMFLOAT(0.5));
		dl->decay = 300;
		S_StartSoundFPM (-1, 0, cl_sfx_r_exp3, pos, 1, 1);
		break;

#ifdef QUAKE2
	case TE_IMPLOSION:
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		S_StartSoundFPM (-1, 0, cl_sfx_imp, pos, 1, 1);
		break;

	case TE_RAILTRAIL:
		pos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		pos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		endpos[0] = FPM_FROMFLOAT(MSG_ReadCoord ());
		endpos[1] = FPM_FROMFLOAT(MSG_ReadCoord ());
		endpos[2] = FPM_FROMFLOAT(MSG_ReadCoord ());
		S_StartSoundFPM (-1, 0, cl_sfx_rail, pos, 1, 1);
		S_StartSoundFPM (-1, 1, cl_sfx_r_exp3, endpos, 1, 1);
		R_RocketTrailFPM (pos, endpos, 0+128);
		R_ParticleExplosionFPM (endpos);
		dl = CL_AllocDlightFPM (-1);
		VectorCopy (endpos, dl->origin);
		dl->radius = 350;
		dl->die = FPM_ADD(FPM_FROMFLOAT(cl.time), FPM_FROMFLOAT(0.5));
		dl->decay = 300;
		break;
#endif

	default:
		Sys_Error ("CL_ParseTEnt: bad type");
	}
}
#endif

/*
=================
CL_NewTempEntity
=================
*/
entity_t *CL_NewTempEntity (void)
{
	entity_t	*ent;

	if (cl_numvisedicts == MAX_VISEDICTS)
		return NULL;
	if (num_temp_entities == MAX_TEMP_ENTITIES)
		return NULL;
	ent = &cl_temp_entities[num_temp_entities];
	Q_memset (ent, 0, sizeof(*ent));
	num_temp_entities++;
	cl_visedicts[cl_numvisedicts] = ent;
	cl_numvisedicts++;

	ent->colormap = vid.colormap;
	return ent;
}

#ifdef USEFPM
entity_FPM_t *CL_NewTempEntityFPM (void)
{
	entity_FPM_t	*ent;

	if (cl_numvisedicts == MAX_VISEDICTS)
		return NULL;
	if (num_temp_entities == MAX_TEMP_ENTITIES)
		return NULL;
	ent = &cl_temp_entitiesFPM[num_temp_entities];
	Q_memset (ent, 0, sizeof(*ent));
	num_temp_entities++;
	cl_visedictsFPM[cl_numvisedicts] = ent;
	cl_numvisedicts++;

	ent->colormap = vid.colormap;
	return ent;
}
#endif
/*
=================
CL_UpdateTEnts
=================
*/
void CL_UpdateTEnts (void)
{
	int			i;
	beam_t		*b;
	vec3_t		dist, org;
	float		d;
	entity_t	*ent;
	float		yaw, pitch;
	float		forward;

	num_temp_entities = 0;

// update lightning
	for (i=0, b=cl_beams ; i< MAX_BEAMS ; i++, b++)
	{
		if (!b->model || b->endtime < cl.time)
			continue;

	// if coming from the player, update the start position
		if (b->entity == cl.viewentity)
		{
			VectorCopy (cl_entities[cl.viewentity].origin, b->start);
		}

	// calculate pitch and yaw
		VectorSubtract (b->end, b->start, dist);

		if (dist[1] == 0 && dist[0] == 0)
		{
			yaw = 0;
			if (dist[2] > 0)
				pitch = 90;
			else
				pitch = 270;
		}
		else
		{
			yaw = (float)(int) (atan2(dist[1], dist[0]) * 180 / M_PI);
			if (yaw < 0)
				yaw += 360;

			forward = (float)sqrt (dist[0]*dist[0] + dist[1]*dist[1]);
			pitch = (float)(int) (atan2(dist[2], forward) * 180 / M_PI);
			if (pitch < 0)
				pitch += 360;
		}

	// add new entities for the lightning
		VectorCopy (b->start, org);
		d = VectorNormalize(dist);
		while (d > 0)
		{
			ent = CL_NewTempEntity ();
			if (!ent)
				return;
			VectorCopy (org, ent->origin);
			ent->model = b->model;
			ent->angles[0] = pitch;
			ent->angles[1] = yaw;
			ent->angles[2] = (float)(rand()%360);

			for (i=0 ; i<3 ; i++)
				org[i] += dist[i]*30;
			d -= 30;
		}
	}

}

#ifdef USEFPM
void CL_UpdateTEntsFPM (void)
{
	int				i;
	beam_FPM_t		*b;
	vec3_FPM_t		dist, org;
	fixedpoint_t	d;
	entity_FPM_t	*ent;
	fixedpoint_t	yaw, pitch;
	fixedpoint_t	forward;

	num_temp_entities = 0;

// update lightning
	for (i=0, b=cl_beamsFPM ; i< MAX_BEAMS ; i++, b++)
	{
		if (!b->model || b->endtime < clFPM.time)
			continue;

	// if coming from the player, update the start position
		if (b->entity == clFPM.viewentity)
		{
			VectorCopy (cl_entitiesFPM[clFPM.viewentity].origin, b->start);
		}

	// calculate pitch and yaw
		VectorSubtractFPM (b->end, b->start, dist);

		if (dist[1] == 0 && dist[0] == 0)
		{
			yaw = 0;
			if (dist[2] > 0)
				pitch = FPM_FROMLONG(90);
			else
				pitch = FPM_FROMLONG(270);
		}
		else
		{
			yaw = FPM_DIV(FPM_MUL(FPM_FROMFLOAT(atan2(dist[1], dist[0])), FPM_FROMLONG(180)), FPM_PI);
			if (yaw < 0)
				yaw = FPM_ADD(yaw, FPM_FROMLONG(360));

			forward = FPM_SQRT(FPM_ADD(FPM_SQR(dist[0]), FPM_SQR(dist[1])));
			pitch = FPM_DIV(FPM_MUL(FPM_FROMFLOAT(atan2(dist[2], forward)), FPM_FROMLONG(180)), FPM_PI);
			if (pitch < 0)
				pitch = FPM_ADD(pitch, FPM_FROMLONG(360));
		}

	// add new entities for the lightning
		VectorCopy (b->start, org);
		d = VectorNormalizeFPM(dist);
		while (d > 0)
		{
			ent = CL_NewTempEntityFPM ();
			if (!ent)
				return;
			VectorCopy (org, ent->origin);
			ent->model = b->model;
			ent->angles[0] = pitch;
			ent->angles[1] = yaw;
			ent->angles[2] = FPM_FROMLONG(rand()%360);

			for (i=0 ; i<3 ; i++)
				org[i] = FPM_ADD(org[i], FPM_MUL(dist[i], FPM_FROMLONG(30)));
			d = FPM_SUB(d, FPM_FROMLONG(30));
		}
	}
}
#endif
