newtree/source/pr_cmds.c

/*
	pr_cmds.c

	(description)

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <string.h>

#include "cmd.h"
#include "msg.h"
#include "server.h"
#include "world.h"
#include "va.h"

#define	RETURN_EDICT(e) (((int *)pr_globals)[OFS_RETURN] = EDICT_TO_PROG(e))
#define	RETURN_STRING(s) (((int *)pr_globals)[OFS_RETURN] = PR_SetString(s))

/*
===============================================================================

						BUILT-IN FUNCTIONS

===============================================================================
*/

char       *
PF_VarString (int first)
{
	int         i;
	static char out[256];

	out[0] = 0;
	for (i = first; i < pr_argc; i++) {
		strncat (out, G_STRING ((OFS_PARM0 + i * 3)),
				 sizeof (out) - strlen (out));
	}
	return out;
}


/*
=================
PF_errror

This is a TERMINAL error, which will kill off the entire server.
Dumps self.

error(value)
=================
*/
void
PF_error (void)
{
	char       *s;
	edict_t    *ed;

	s = PF_VarString (0);
	Con_Printf ("======SERVER ERROR in %s:\n%s\n",
				PR_GetString (pr_xfunction->s_name), s);
	ed = PROG_TO_EDICT (pr_global_struct->self);
	ED_Print (ed);

	SV_Error ("Program error");
}

/*
=================
PF_objerror

Dumps out self, then an error message.  The program is aborted and self is
removed, but the level can continue.

objerror(value)
=================
*/
void
PF_objerror (void)
{
	char       *s;
	edict_t    *ed;

	s = PF_VarString (0);
	Con_Printf ("======OBJECT ERROR in %s:\n%s\n",
				PR_GetString (pr_xfunction->s_name), s);
	ed = PROG_TO_EDICT (pr_global_struct->self);
	ED_Print (ed);
	ED_Free (ed);

	SV_Error ("Program error");
}



/*
==============
PF_makevectors

Writes new values for v_forward, v_up, and v_right based on angles
makevectors(vector)
==============
*/
void
PF_makevectors (void)
{
	AngleVectors (G_VECTOR (OFS_PARM0), pr_global_struct->v_forward,
				  pr_global_struct->v_right, pr_global_struct->v_up);
}

/*
=================
PF_setorigin

This is the only valid way to move an object without using the physics of the world (setting velocity and waiting).  Directly changing origin will not set internal links correctly, so clipping would be messed up.  This should be called when an object is spawned, and then only if it is teleported.

setorigin (entity, origin)
=================
*/
void
PF_setorigin (void)
{
	edict_t    *e;
	float      *org;

	e = G_EDICT (OFS_PARM0);
	org = G_VECTOR (OFS_PARM1);
	VectorCopy (org, e->v.origin);
	SV_LinkEdict (e, false);
}


/*
=================
PF_setsize

the size box is rotated by the current angle

setsize (entity, minvector, maxvector)
=================
*/
void
PF_setsize (void)
{
	edict_t    *e;
	float      *min, *max;

	e = G_EDICT (OFS_PARM0);
	min = G_VECTOR (OFS_PARM1);
	max = G_VECTOR (OFS_PARM2);
	VectorCopy (min, e->v.mins);
	VectorCopy (max, e->v.maxs);
	VectorSubtract (max, min, e->v.size);
	SV_LinkEdict (e, false);
}


/*
=================
PF_setmodel

setmodel(entity, model)
Also sets size, mins, and maxs for inline bmodels
=================
*/
void
PF_setmodel (void)
{
	edict_t    *e;
	char       *m, **check;
	int         i;
	model_t    *mod;

	e = G_EDICT (OFS_PARM0);
	m = G_STRING (OFS_PARM1);

// check to see if model was properly precached
	for (i = 0, check = sv.model_precache; *check; i++, check++)
		if (!strcmp (*check, m))
			break;

	if (!*check)
		PR_RunError ("no precache: %s\n", m);

	e->v.model = PR_SetString (m);
	e->v.modelindex = i;

// if it is an inline model, get the size information for it
	if (m[0] == '*') {
		mod = Mod_ForName (m, true);
		VectorCopy (mod->mins, e->v.mins);
		VectorCopy (mod->maxs, e->v.maxs);
		VectorSubtract (mod->maxs, mod->mins, e->v.size);
		SV_LinkEdict (e, false);
	}

}

/*
=================
PF_bprint

broadcast print to everyone on server

bprint(value)
=================
*/
void
PF_bprint (void)
{
	char       *s;
	int         level;

	level = G_FLOAT (OFS_PARM0);

	s = PF_VarString (1);
	SV_BroadcastPrintf (level, "%s", s);
}

/*
=================
PF_sprint

single print to a specific client

sprint(clientent, value)
=================
*/
void
PF_sprint (void)
{
	char       *s;
	client_t   *client;
	int         entnum;
	int         level;

	entnum = G_EDICTNUM (OFS_PARM0);
	level = G_FLOAT (OFS_PARM1);

	s = PF_VarString (2);

	if (entnum < 1 || entnum > MAX_CLIENTS) {
		Con_Printf ("tried to sprint to a non-client\n");
		return;
	}

	client = &svs.clients[entnum - 1];

	SV_ClientPrintf (client, level, "%s", s);
}


/*
=================
PF_centerprint

single print to a specific client

centerprint(clientent, value)
=================
*/
void
PF_centerprint (void)
{
	char       *s;
	int         entnum;
	client_t   *cl;

	entnum = G_EDICTNUM (OFS_PARM0);
	s = PF_VarString (1);

	if (entnum < 1 || entnum > MAX_CLIENTS) {
		Con_Printf ("tried to sprint to a non-client\n");
		return;
	}

	cl = &svs.clients[entnum - 1];

	ClientReliableWrite_Begin (cl, svc_centerprint, 2 + strlen (s));
	ClientReliableWrite_String (cl, s);
}


/*
=================
PF_normalize

vector normalize(vector)
=================
*/
void
PF_normalize (void)
{
	float      *value1;
	vec3_t      newvalue;
	float       new;

	value1 = G_VECTOR (OFS_PARM0);

	new = value1[0] * value1[0] + value1[1] * value1[1] + value1[2] * value1[2];
	new = sqrt (new);

	if (new == 0)
		newvalue[0] = newvalue[1] = newvalue[2] = 0;
	else {
		new = 1 / new;
		newvalue[0] = value1[0] * new;
		newvalue[1] = value1[1] * new;
		newvalue[2] = value1[2] * new;
	}

	VectorCopy (newvalue, G_VECTOR (OFS_RETURN));
}

/*
=================
PF_vlen

scalar vlen(vector)
=================
*/
void
PF_vlen (void)
{
	float      *value1;
	float       new;

	value1 = G_VECTOR (OFS_PARM0);

	new = value1[0] * value1[0] + value1[1] * value1[1] + value1[2] * value1[2];
	new = sqrt (new);

	G_FLOAT (OFS_RETURN) = new;
}

/*
=================
PF_vectoyaw

float vectoyaw(vector)
=================
*/
void
PF_vectoyaw (void)
{
	float      *value1;
	float       yaw;

	value1 = G_VECTOR (OFS_PARM0);

	if (value1[1] == 0 && value1[0] == 0)
		yaw = 0;
	else {
		yaw = (int) (atan2 (value1[1], value1[0]) * 180 / M_PI);
		if (yaw < 0)
			yaw += 360;
	}

	G_FLOAT (OFS_RETURN) = yaw;
}


/*
=================
PF_vectoangles

vector vectoangles(vector)
=================
*/
void
PF_vectoangles (void)
{
	float      *value1;
	float       forward;
	float       yaw, pitch;

	value1 = G_VECTOR (OFS_PARM0);

	if (value1[1] == 0 && value1[0] == 0) {
		yaw = 0;
		if (value1[2] > 0)
			pitch = 90;
		else
			pitch = 270;
	} else {
		yaw = (int) (atan2 (value1[1], value1[0]) * 180 / M_PI);
		if (yaw < 0)
			yaw += 360;

		forward = sqrt (value1[0] * value1[0] + value1[1] * value1[1]);
		pitch = (int) (atan2 (value1[2], forward) * 180 / M_PI);
		if (pitch < 0)
			pitch += 360;
	}

	G_FLOAT (OFS_RETURN + 0) = pitch;
	G_FLOAT (OFS_RETURN + 1) = yaw;
	G_FLOAT (OFS_RETURN + 2) = 0;
}

/*
=================
PF_Random

Returns a number from 0<= num < 1

random()
=================
*/
void
PF_random (void)
{
	float       num;

	num = (rand () & 0x7fff) / ((float) 0x7fff);

	G_FLOAT (OFS_RETURN) = num;
}


/*
=================
PF_ambientsound

=================
*/
void
PF_ambientsound (void)
{
	char      **check;
	char       *samp;
	float      *pos;
	float       vol, attenuation;
	int         i, soundnum;

	pos = G_VECTOR (OFS_PARM0);
	samp = G_STRING (OFS_PARM1);
	vol = G_FLOAT (OFS_PARM2);
	attenuation = G_FLOAT (OFS_PARM3);

// check to see if samp was properly precached
	for (soundnum = 0, check = sv.sound_precache; *check; check++, soundnum++)
		if (!strcmp (*check, samp))
			break;

	if (!*check) {
		Con_Printf ("no precache: %s\n", samp);
		return;
	}
// add an svc_spawnambient command to the level signon packet

	MSG_WriteByte (&sv.signon, svc_spawnstaticsound);
	for (i = 0; i < 3; i++)
		MSG_WriteCoord (&sv.signon, pos[i]);

	MSG_WriteByte (&sv.signon, soundnum);

	MSG_WriteByte (&sv.signon, vol * 255);
	MSG_WriteByte (&sv.signon, attenuation * 64);

}

/*
=================
PF_sound

Each entity can have eight independant sound sources, like voice,
weapon, feet, etc.

Channel 0 is an auto-allocate channel, the others override anything
allready running on that entity/channel pair.

An attenuation of 0 will play full volume everywhere in the level.
Larger attenuations will drop off.

=================
*/
void
PF_sound (void)
{
	char       *sample;
	int         channel;
	edict_t    *entity;
	int         volume;
	float       attenuation;

	entity = G_EDICT (OFS_PARM0);
	channel = G_FLOAT (OFS_PARM1);
	sample = G_STRING (OFS_PARM2);
	volume = G_FLOAT (OFS_PARM3) * 255;
	attenuation = G_FLOAT (OFS_PARM4);

	SV_StartSound (entity, channel, sample, volume, attenuation);
}

/*
=================
PF_break

break()
=================
*/
void
PF_break (void)
{
	Con_Printf ("break statement\n");
	*(int *) -4 = 0;					// dump to debugger
//  PR_RunError ("break statement");
}

/*
=================
PF_traceline

Used for use tracing and shot targeting
Traces are blocked by bbox and exact bsp entityes, and also slide box entities
if the tryents flag is set.

traceline (vector1, vector2, tryents)
=================
*/
void
PF_traceline (void)
{
	float      *v1, *v2;
	trace_t     trace;
	int         nomonsters;
	edict_t    *ent;

	v1 = G_VECTOR (OFS_PARM0);
	v2 = G_VECTOR (OFS_PARM1);
	nomonsters = G_FLOAT (OFS_PARM2);
	ent = G_EDICT (OFS_PARM3);

	trace = SV_Move (v1, vec3_origin, vec3_origin, v2, nomonsters, ent);

	pr_global_struct->trace_allsolid = trace.allsolid;
	pr_global_struct->trace_startsolid = trace.startsolid;
	pr_global_struct->trace_fraction = trace.fraction;
	pr_global_struct->trace_inwater = trace.inwater;
	pr_global_struct->trace_inopen = trace.inopen;
	VectorCopy (trace.endpos, pr_global_struct->trace_endpos);
	VectorCopy (trace.plane.normal, pr_global_struct->trace_plane_normal);
	pr_global_struct->trace_plane_dist = trace.plane.dist;
	if (trace.ent)
		pr_global_struct->trace_ent = EDICT_TO_PROG (trace.ent);
	else
		pr_global_struct->trace_ent = EDICT_TO_PROG (sv.edicts);
}

/*
=================
PF_checkpos

Returns true if the given entity can move to the given position from it's
current position by walking or rolling.
FIXME: make work...
scalar checkpos (entity, vector)
=================
*/
void
PF_checkpos (void)
{
}

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

byte        checkpvs[MAX_MAP_LEAFS / 8];

int
PF_newcheckclient (int check)
{
	int         i;
	byte       *pvs;
	edict_t    *ent;
	mleaf_t    *leaf;
	vec3_t      org;

// cycle to the next one

	if (check < 1)
		check = 1;
	if (check > MAX_CLIENTS)
		check = MAX_CLIENTS;

	if (check == MAX_CLIENTS)
		i = 1;
	else
		i = check + 1;

	for (;; i++) {
		if (i == MAX_CLIENTS + 1)
			i = 1;

		ent = EDICT_NUM (i);

		if (i == check)
			break;						// didn't find anything else

		if (ent->free)
			continue;
		if (ent->v.health <= 0)
			continue;
		if ((int) ent->v.flags & FL_NOTARGET)
			continue;

		// anything that is a client, or has a client as an enemy
		break;
	}

// get the PVS for the entity
	VectorAdd (ent->v.origin, ent->v.view_ofs, org);
	leaf = Mod_PointInLeaf (org, sv.worldmodel);
	pvs = Mod_LeafPVS (leaf, sv.worldmodel);
	memcpy (checkpvs, pvs, (sv.worldmodel->numleafs + 7) >> 3);

	return i;
}

/*
=================
PF_checkclient

Returns a client (or object that has a client enemy) that would be a
valid target.

If there are more than one valid options, they are cycled each frame

If (self.origin + self.viewofs) is not in the PVS of the current target,
it is not returned at all.

name checkclient ()
=================
*/
#define	MAX_CHECK	16
int         c_invis, c_notvis;
void
PF_checkclient (void)
{
	edict_t    *ent, *self;
	mleaf_t    *leaf;
	int         l;
	vec3_t      view;

// find a new check if on a new frame
	if (sv.time - sv.lastchecktime >= 0.1) {
		sv.lastcheck = PF_newcheckclient (sv.lastcheck);
		sv.lastchecktime = sv.time;
	}
// return check if it might be visible  
	ent = EDICT_NUM (sv.lastcheck);
	if (ent->free || ent->v.health <= 0) {
		RETURN_EDICT (sv.edicts);
		return;
	}
// if current entity can't possibly see the check entity, return 0
	self = PROG_TO_EDICT (pr_global_struct->self);
	VectorAdd (self->v.origin, self->v.view_ofs, view);
	leaf = Mod_PointInLeaf (view, sv.worldmodel);
	l = (leaf - sv.worldmodel->leafs) - 1;
	if ((l < 0) || !(checkpvs[l >> 3] & (1 << (l & 7)))) {
		c_notvis++;
		RETURN_EDICT (sv.edicts);
		return;
	}
// might be able to see it
	c_invis++;
	RETURN_EDICT (ent);
}

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


/*
=================
PF_stuffcmd

Sends text over to the client's execution buffer

stuffcmd (clientent, value)
=================
*/
void
PF_stuffcmd (void)
{
	int         entnum;
	char       *str;
	client_t   *cl;
	char       *buf;
	int         i;

	entnum = G_EDICTNUM (OFS_PARM0);
	if (entnum < 1 || entnum > MAX_CLIENTS)
		PR_RunError ("Parm 0 not a client");
	str = G_STRING (OFS_PARM1);

	cl = &svs.clients[entnum - 1];

	buf = cl->stufftext_buf;
	if (strlen (buf) + strlen (str) >= MAX_STUFFTEXT)
		PR_RunError ("stufftext buffer overflow");
	strncat (buf, str, MAX_STUFFTEXT - strlen (buf));

	for (i = strlen (buf); i >= 0; i--) {
		if (buf[i] == '\n') {
			if (!strcmp (buf, "disconnect\n")) {
				// so long and thanks for all the fish
				cl->drop = true;
				buf[0] = 0;
				return;
			}
			ClientReliableWrite_Begin (cl, svc_stufftext, 2 + strlen (buf));
			ClientReliableWrite_String (cl, buf);
			buf[0] = 0;
		}
	}
}

/*
=================
PF_localcmd

Sends text over to the client's execution buffer

localcmd (string)
=================
*/
void
PF_localcmd (void)
{
	char       *str;

	str = G_STRING (OFS_PARM0);
	Cbuf_AddText (str);
}

/*
=================
PF_cvar

float cvar (string)
=================
*/
void
PF_cvar (void)
{
	char       *str;

	str = G_STRING (OFS_PARM0);

	G_FLOAT (OFS_RETURN) = Cvar_VariableValue (str);
}

/*
=================
PF_cvar_set

float cvar (string)
=================
*/
void
PF_cvar_set (void)
{
	char       *var_name, *val;
	cvar_t     *var;

	var_name = G_STRING (OFS_PARM0);
	val = G_STRING (OFS_PARM1);
	var = Cvar_FindVar (var_name);
	if (!var)
		var = Cvar_FindAlias (var_name);
	if (!var) {
		// FIXME: make Con_DPrint?
		Con_Printf ("PF_cvar_set: variable %s not found\n", var_name);
		return;
	}

	Cvar_Set (var, val);
}

/*
=================
PF_findradius

Returns a chain of entities that have origins within a spherical area

findradius (origin, radius)
=================
*/
void
PF_findradius (void)
{
	edict_t    *ent, *chain;
	float       rad;
	float      *org;
	vec3_t      eorg;
	int         i, j;

	chain = (edict_t *) sv.edicts;

	org = G_VECTOR (OFS_PARM0);
	rad = G_FLOAT (OFS_PARM1);

	ent = NEXT_EDICT (sv.edicts);
	for (i = 1; i < sv.num_edicts; i++, ent = NEXT_EDICT (ent)) {
		if (ent->free)
			continue;
		if (ent->v.solid == SOLID_NOT)
			continue;
		for (j = 0; j < 3; j++)
			eorg[j] =
				org[j] - (ent->v.origin[j] +
						  (ent->v.mins[j] + ent->v.maxs[j]) * 0.5);
		if (Length (eorg) > rad)
			continue;

		ent->v.chain = EDICT_TO_PROG (chain);
		chain = ent;
	}

	RETURN_EDICT (chain);
}


/*
=========
PF_dprint
=========
*/
void
PF_dprint (void)
{
	Con_Printf ("%s", PF_VarString (0));
}

char        pr_string_temp[128];

void
PF_ftos (void)
{
	float       v;
	int         i;						// 1999-07-25 FTOS fix by Maddes

	v = G_FLOAT (OFS_PARM0);

	if (v == (int) v)
		snprintf (pr_string_temp, sizeof (pr_string_temp), "%d", (int) v);
	else
// 1999-07-25 FTOS fix by Maddes  start
	{
		snprintf (pr_string_temp, sizeof (pr_string_temp), "%1f", v);
		for (i = strlen (pr_string_temp) - 1;
			 i > 0 && pr_string_temp[i] == '0' && pr_string_temp[i - 1] != '.';
			 i--) {
			pr_string_temp[i] = 0;
		}
	}
// 1999-07-25 FTOS fix by Maddes  end
	G_INT (OFS_RETURN) = PR_SetString (pr_string_temp);
}

void
PF_fabs (void)
{
	float       v;

	v = G_FLOAT (OFS_PARM0);
	G_FLOAT (OFS_RETURN) = fabs (v);
}

void
PF_vtos (void)
{
	snprintf (pr_string_temp, sizeof (pr_string_temp), "'%5.1f %5.1f %5.1f'",
			  G_VECTOR (OFS_PARM0)[0], G_VECTOR (OFS_PARM0)[1],
			  G_VECTOR (OFS_PARM0)[2]);
	G_INT (OFS_RETURN) = PR_SetString (pr_string_temp);
}

void
PF_Spawn (void)
{
	edict_t    *ed;

	ed = ED_Alloc ();
	RETURN_EDICT (ed);
}

void
PF_Remove (void)
{
	edict_t    *ed;

	ed = G_EDICT (OFS_PARM0);
	ED_Free (ed);
}


// entity (entity start, .string field, string match) find = #5;
void
PF_Find (void)
{
	int         e;
	int         f;
	char       *s, *t;
	edict_t    *ed;

	e = G_EDICTNUM (OFS_PARM0);
	f = G_INT (OFS_PARM1);
	s = G_STRING (OFS_PARM2);
	if (!s)
		PR_RunError ("PF_Find: bad search string");

	for (e++; e < sv.num_edicts; e++) {
		ed = EDICT_NUM (e);
		if (ed->free)
			continue;
		t = E_STRING (ed, f);
		if (!t)
			continue;
		if (!strcmp (t, s)) {
			RETURN_EDICT (ed);
			return;
		}
	}

	RETURN_EDICT (sv.edicts);
}

void
PR_CheckEmptyString (char *s)
{
	if (s[0] <= ' ')
		PR_RunError ("Bad string");
}

void
PF_precache_file (void)
{										// precache_file is only used to copy 
										// files with qcc, it does nothing
	G_INT (OFS_RETURN) = G_INT (OFS_PARM0);
}

void
PF_precache_sound (void)
{
	char       *s;
	int         i;

	if (sv.state != ss_loading)
		PR_RunError
			("PF_Precache_*: Precache can only be done in spawn functions");

	s = G_STRING (OFS_PARM0);
	G_INT (OFS_RETURN) = G_INT (OFS_PARM0);
	PR_CheckEmptyString (s);

	for (i = 0; i < MAX_SOUNDS; i++) {
		if (!sv.sound_precache[i]) {
			sv.sound_precache[i] = s;
			return;
		}
		if (!strcmp (sv.sound_precache[i], s))
			return;
	}
	PR_RunError ("PF_precache_sound: overflow");
}

void
PF_precache_model (void)
{
	char       *s;
	int         i;

	if (sv.state != ss_loading)
		PR_RunError
			("PF_Precache_*: Precache can only be done in spawn functions");

	s = G_STRING (OFS_PARM0);
	G_INT (OFS_RETURN) = G_INT (OFS_PARM0);
	PR_CheckEmptyString (s);

	for (i = 0; i < MAX_MODELS; i++) {
		if (!sv.model_precache[i]) {
			sv.model_precache[i] = s;
			return;
		}
		if (!strcmp (sv.model_precache[i], s))
			return;
	}
	PR_RunError ("PF_precache_model: overflow");
}


void
PF_coredump (void)
{
	ED_PrintEdicts ();
}

void
PF_traceon (void)
{
	pr_trace = true;
}

void
PF_traceoff (void)
{
	pr_trace = false;
}

void
PF_eprint (void)
{
	ED_PrintNum (G_EDICTNUM (OFS_PARM0));
}

/*
===============
PF_walkmove

float(float yaw, float dist) walkmove
===============
*/
void
PF_walkmove (void)
{
	edict_t    *ent;
	float       yaw, dist;
	vec3_t      move;
	dfunction_t *oldf;
	int         oldself;

	ent = PROG_TO_EDICT (pr_global_struct->self);
	yaw = G_FLOAT (OFS_PARM0);
	dist = G_FLOAT (OFS_PARM1);

	if (!((int) ent->v.flags & (FL_ONGROUND | FL_FLY | FL_SWIM))) {
		G_FLOAT (OFS_RETURN) = 0;
		return;
	}

	yaw = yaw * M_PI * 2 / 360;

	move[0] = cos (yaw) * dist;
	move[1] = sin (yaw) * dist;
	move[2] = 0;

// save program state, because SV_movestep may call other progs
	oldf = pr_xfunction;
	oldself = pr_global_struct->self;

	G_FLOAT (OFS_RETURN) = SV_movestep (ent, move, true);


// restore program state
	pr_xfunction = oldf;
	pr_global_struct->self = oldself;
}

/*
===============
PF_droptofloor

void() droptofloor
===============
*/
void
PF_droptofloor (void)
{
	edict_t    *ent;
	vec3_t      end;
	trace_t     trace;

	ent = PROG_TO_EDICT (pr_global_struct->self);

	VectorCopy (ent->v.origin, end);
	end[2] -= 256;

	trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, false, ent);

	if (trace.fraction == 1 || trace.allsolid)
		G_FLOAT (OFS_RETURN) = 0;
	else {
		VectorCopy (trace.endpos, ent->v.origin);
		SV_LinkEdict (ent, false);
		ent->v.flags = (int) ent->v.flags | FL_ONGROUND;
		ent->v.groundentity = EDICT_TO_PROG (trace.ent);
		G_FLOAT (OFS_RETURN) = 1;
	}
}

/*
===============
PF_lightstyle

void(float style, string value) lightstyle
===============
*/
void
PF_lightstyle (void)
{
	int         style;
	char       *val;
	client_t   *client;
	int         j;

	style = G_FLOAT (OFS_PARM0);
	val = G_STRING (OFS_PARM1);

// change the string in sv
	sv.lightstyles[style] = val;

// send message to all clients on this server
	if (sv.state != ss_active)
		return;

	for (j = 0, client = svs.clients; j < MAX_CLIENTS; j++, client++)
		if (client->state == cs_spawned) {
			ClientReliableWrite_Begin (client, svc_lightstyle,
									   strlen (val) + 3);
			ClientReliableWrite_Char (client, style);
			ClientReliableWrite_String (client, val);
		}
}

void
PF_rint (void)
{
	float       f;

	f = G_FLOAT (OFS_PARM0);
	if (f > 0)
		G_FLOAT (OFS_RETURN) = (int) (f + 0.5);
	else
		G_FLOAT (OFS_RETURN) = (int) (f - 0.5);
}

void
PF_floor (void)
{
	G_FLOAT (OFS_RETURN) = floor (G_FLOAT (OFS_PARM0));
}

void
PF_ceil (void)
{
	G_FLOAT (OFS_RETURN) = ceil (G_FLOAT (OFS_PARM0));
}


/*
=============
PF_checkbottom
=============
*/
void
PF_checkbottom (void)
{
	edict_t    *ent;

	ent = G_EDICT (OFS_PARM0);

	G_FLOAT (OFS_RETURN) = SV_CheckBottom (ent);
}

/*
=============
PF_pointcontents
=============
*/
void
PF_pointcontents (void)
{
	float      *v;

	v = G_VECTOR (OFS_PARM0);

	G_FLOAT (OFS_RETURN) = SV_PointContents (v);
}

/*
=============
PF_nextent

entity nextent(entity)
=============
*/
void
PF_nextent (void)
{
	int         i;
	edict_t    *ent;

	i = G_EDICTNUM (OFS_PARM0);
	while (1) {
		i++;
		if (i == sv.num_edicts) {
			RETURN_EDICT (sv.edicts);
			return;
		}
		ent = EDICT_NUM (i);
		if (!ent->free) {
			RETURN_EDICT (ent);
			return;
		}
	}
}

/*
=============
PF_aim

Pick a vector for the player to shoot along
vector aim(entity, missilespeed)
=============
*/
cvar_t     *sv_aim;
void
PF_aim (void)
{
	edict_t    *ent, *check, *bestent;
	vec3_t      start, dir, end, bestdir;
	int         i, j;
	trace_t     tr;
	float       dist, bestdist;
	float       speed;
	char       *noaim;

	ent = G_EDICT (OFS_PARM0);
	speed = G_FLOAT (OFS_PARM1);

	VectorCopy (ent->v.origin, start);
	start[2] += 20;

// noaim option
	i = NUM_FOR_EDICT (ent);
	if (i > 0 && i < MAX_CLIENTS) {
		noaim = Info_ValueForKey (svs.clients[i - 1].userinfo, "noaim");
		if (atoi (noaim) > 0) {
			VectorCopy (pr_global_struct->v_forward, G_VECTOR (OFS_RETURN));
			return;
		}
	}
// try sending a trace straight
	VectorCopy (pr_global_struct->v_forward, dir);
	VectorMA (start, 2048, dir, end);
	tr = SV_Move (start, vec3_origin, vec3_origin, end, false, ent);
	if (tr.ent && tr.ent->v.takedamage == DAMAGE_AIM
		&& (!teamplay->int_val || ent->v.team <= 0
			|| ent->v.team != tr.ent->v.team)) {
		VectorCopy (pr_global_struct->v_forward, G_VECTOR (OFS_RETURN));
		return;
	}

// try all possible entities
	VectorCopy (dir, bestdir);
	bestdist = sv_aim->value;
	bestent = NULL;

	check = NEXT_EDICT (sv.edicts);
	for (i = 1; i < sv.num_edicts; i++, check = NEXT_EDICT (check)) {
		if (check->v.takedamage != DAMAGE_AIM)
			continue;
		if (check == ent)
			continue;
		if (teamplay->int_val && ent->v.team > 0
			&& ent->v.team == check->v.team) continue;	// don't aim at
														// teammate
		for (j = 0; j < 3; j++)
			end[j] = check->v.origin[j]
				+ 0.5 * (check->v.mins[j] + check->v.maxs[j]);
		VectorSubtract (end, start, dir);
		VectorNormalize (dir);
		dist = DotProduct (dir, pr_global_struct->v_forward);
		if (dist < bestdist)
			continue;					// to far to turn
		tr = SV_Move (start, vec3_origin, vec3_origin, end, false, ent);
		if (tr.ent == check) {			// can shoot at this one
			bestdist = dist;
			bestent = check;
		}
	}

	if (bestent) {
		VectorSubtract (bestent->v.origin, ent->v.origin, dir);
		dist = DotProduct (dir, pr_global_struct->v_forward);
		VectorScale (pr_global_struct->v_forward, dist, end);
		end[2] = dir[2];
		VectorNormalize (end);
		VectorCopy (end, G_VECTOR (OFS_RETURN));
	} else {
		VectorCopy (bestdir, G_VECTOR (OFS_RETURN));
	}
}

/*
==============
PF_changeyaw

This was a major timewaster in progs, so it was converted to C
==============
*/
void
PF_changeyaw (void)
{
	edict_t    *ent;
	float       ideal, current, move, speed;

	ent = PROG_TO_EDICT (pr_global_struct->self);
	current = anglemod (ent->v.angles[1]);
	ideal = ent->v.ideal_yaw;
	speed = ent->v.yaw_speed;

	if (current == ideal)
		return;
	move = ideal - current;
	if (ideal > current) {
		if (move >= 180)
			move = move - 360;
	} else {
		if (move <= -180)
			move = move + 360;
	}
	if (move > 0) {
		if (move > speed)
			move = speed;
	} else {
		if (move < -speed)
			move = -speed;
	}

	ent->v.angles[1] = anglemod (current + move);
}

/*
===============================================================================

MESSAGE WRITING

===============================================================================
*/

#define	MSG_BROADCAST	0				// unreliable to all
#define	MSG_ONE			1				// reliable to one (msg_entity)
#define	MSG_ALL			2				// reliable to all
#define	MSG_INIT		3				// write to the init string
#define	MSG_MULTICAST	4				// for multicast()

sizebuf_t  *
WriteDest (void)
{
	int         dest;

	dest = G_FLOAT (OFS_PARM0);
	switch (dest) {
		case MSG_BROADCAST:
			return &sv.datagram;

		case MSG_ONE:
			SV_Error ("Shouldn't be at MSG_ONE");
#if 0
			ent = PROG_TO_EDICT (pr_global_struct->msg_entity);
			entnum = NUM_FOR_EDICT (ent);
			if (entnum < 1 || entnum > MAX_CLIENTS)
				PR_RunError ("WriteDest: not a client");
			return &svs.clients[entnum - 1].netchan.message;
#endif

		case MSG_ALL:
			return &sv.reliable_datagram;

		case MSG_INIT:
			if (sv.state != ss_loading)
				PR_RunError
					("PF_Write_*: MSG_INIT can only be written in spawn functions");
			return &sv.signon;

		case MSG_MULTICAST:
			return &sv.multicast;

		default:
			PR_RunError ("WriteDest: bad destination");
			break;
	}

	return NULL;
}

static client_t *
Write_GetClient (void)
{
	int         entnum;
	edict_t    *ent;

	ent = PROG_TO_EDICT (pr_global_struct->msg_entity);
	entnum = NUM_FOR_EDICT (ent);
	if (entnum < 1 || entnum > MAX_CLIENTS)
		PR_RunError ("WriteDest: not a client");
	return &svs.clients[entnum - 1];
}


void
PF_WriteByte (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 1);
		ClientReliableWrite_Byte (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteByte (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteChar (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 1);
		ClientReliableWrite_Char (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteChar (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteShort (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 2);
		ClientReliableWrite_Short (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteShort (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteLong (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 4);
		ClientReliableWrite_Long (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteLong (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteAngle (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 1);
		ClientReliableWrite_Angle (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteAngle (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteCoord (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 2);
		ClientReliableWrite_Coord (cl, G_FLOAT (OFS_PARM1));
	} else
		MSG_WriteCoord (WriteDest (), G_FLOAT (OFS_PARM1));
}

void
PF_WriteString (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 1 + strlen (G_STRING (OFS_PARM1)));
		ClientReliableWrite_String (cl, G_STRING (OFS_PARM1));
	} else
		MSG_WriteString (WriteDest (), G_STRING (OFS_PARM1));
}


void
PF_WriteEntity (void)
{
	if (G_FLOAT (OFS_PARM0) == MSG_ONE) {
		client_t   *cl = Write_GetClient ();

		ClientReliableCheckBlock (cl, 2);
		ClientReliableWrite_Short (cl, G_EDICTNUM (OFS_PARM1));
	} else
		MSG_WriteShort (WriteDest (), G_EDICTNUM (OFS_PARM1));
}

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

int         SV_ModelIndex (char *name);

void
PF_makestatic (void)
{
	edict_t    *ent;
	int         i;

	ent = G_EDICT (OFS_PARM0);

	MSG_WriteByte (&sv.signon, svc_spawnstatic);

	MSG_WriteByte (&sv.signon, SV_ModelIndex (PR_GetString (ent->v.model)));

	MSG_WriteByte (&sv.signon, ent->v.frame);
	MSG_WriteByte (&sv.signon, ent->v.colormap);
	MSG_WriteByte (&sv.signon, ent->v.skin);
	for (i = 0; i < 3; i++) {
		MSG_WriteCoord (&sv.signon, ent->v.origin[i]);
		MSG_WriteAngle (&sv.signon, ent->v.angles[i]);
	}

// throw the entity away now
	ED_Free (ent);
}

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

/*
==============
PF_setspawnparms
==============
*/
void
PF_setspawnparms (void)
{
	edict_t    *ent;
	int         i;
	client_t   *client;

	ent = G_EDICT (OFS_PARM0);
	i = NUM_FOR_EDICT (ent);
	if (i < 1 || i > MAX_CLIENTS)
		PR_RunError ("Entity is not a client");

	// copy spawn parms out of the client_t
	client = svs.clients + (i - 1);

	for (i = 0; i < NUM_SPAWN_PARMS; i++)
		(&pr_global_struct->parm1)[i] = client->spawn_parms[i];
}

/*
==============
PF_changelevel
==============
*/
void
PF_changelevel (void)
{
	char       *s;
	static int  last_spawncount;

// make sure we don't issue two changelevels
	if (svs.spawncount == last_spawncount)
		return;
	last_spawncount = svs.spawncount;

	s = G_STRING (OFS_PARM0);
	Cbuf_AddText (va ("map %s\n", s));
}


/*
==============
PF_logfrag

logfrag (killer, killee)
==============
*/
void
PF_logfrag (void)
{
	edict_t    *ent1, *ent2;
	int         e1, e2;
	char       *s;

	ent1 = G_EDICT (OFS_PARM0);
	ent2 = G_EDICT (OFS_PARM1);

	e1 = NUM_FOR_EDICT (ent1);
	e2 = NUM_FOR_EDICT (ent2);

	if (e1 < 1 || e1 > MAX_CLIENTS || e2 < 1 || e2 > MAX_CLIENTS)
		return;

	s = va ("\\%s\\%s\\\n", svs.clients[e1 - 1].name, svs.clients[e2 - 1].name);

	SZ_Print (&svs.log[svs.logsequence & 1], s);
	if (sv_fraglogfile) {
		Qprintf (sv_fraglogfile, s);
		Qflush (sv_fraglogfile);
	}
}


/*
==============
PF_infokey

string(entity e, string key) infokey
==============
*/
void
PF_infokey (void)
{
	edict_t    *e;
	int         e1;
	char       *value;
	char       *key;
	static char ov[256];

	e = G_EDICT (OFS_PARM0);
	e1 = NUM_FOR_EDICT (e);
	key = G_STRING (OFS_PARM1);

	if (e1 == 0) {
		if ((value = Info_ValueForKey (svs.info, key)) == NULL || !*value)
			value = Info_ValueForKey (localinfo, key);
	} else if (e1 <= MAX_CLIENTS) {
		if (!strcmp (key, "ip"))
			value =
				strcpy (ov,
						NET_BaseAdrToString (svs.clients[e1 - 1].netchan.
											 remote_address));
		else if (!strcmp (key, "ping")) {
			int         ping = SV_CalcPing (&svs.clients[e1 - 1]);

			snprintf (ov, sizeof (ov), "%d", ping);
			value = ov;
		} else
			value = Info_ValueForKey (svs.clients[e1 - 1].userinfo, key);
	} else
		value = "";

	RETURN_STRING (value);
}

/*
==============
PF_stof

float(string s) stof
==============
*/
void
PF_stof (void)
{
	char       *s;

	s = G_STRING (OFS_PARM0);

	G_FLOAT (OFS_RETURN) = atof (s);
}


/*
==============
PF_multicast

void(vector where, float set) multicast
==============
*/
void
PF_multicast (void)
{
	float      *o;
	int         to;

	o = G_VECTOR (OFS_PARM0);
	to = G_FLOAT (OFS_PARM1);

	SV_Multicast (o, to);
}


void
PF_Fixme (void)
{
	PR_RunError ("unimplemented bulitin");
}



builtin_t   pr_builtin[] = {
	PF_Fixme,
	PF_makevectors,						// void(entity e)   makevectors
										// = #1;
	PF_setorigin,						// void(entity e, vector o) setorigin
										// = #2;
	PF_setmodel,						// void(entity e, string m) setmodel
										// = #3;
	PF_setsize,							// void(entity e, vector min, vector
										// max) setsize = #4;
	PF_Fixme,							// void(entity e, vector min, vector
										// max) setabssize = #5;
	PF_break,							// void() break                     = 
										// #6;
	PF_random,							// float() random
										// = #7;
	PF_sound,							// void(entity e, float chan, string
										// samp) sound = #8;
	PF_normalize,						// vector(vector v) normalize
										// = #9;
	PF_error,							// void(string e) error             = 
										// #10;
	PF_objerror,						// void(string e) objerror
										// = #11;
	PF_vlen,							// float(vector v) vlen             = 
										// #12;
	PF_vectoyaw,						// float(vector v) vectoyaw     =
										// #13;
	PF_Spawn,							// entity() spawn
										// = #14;
	PF_Remove,							// void(entity e) remove
										// = #15;
	PF_traceline,						// float(vector v1, vector v2, float
										// tryents) traceline = #16;
	PF_checkclient,						// entity() clientlist
										// = #17;
	PF_Find,							// entity(entity start, .string fld,
										// string match) find = #18;
	PF_precache_sound,					// void(string s) precache_sound
										// = #19;
	PF_precache_model,					// void(string s) precache_model
										// = #20;
	PF_stuffcmd,						// void(entity client, string
										// s)stuffcmd = #21;
	PF_findradius,						// entity(vector org, float rad)
										// findradius = #22;
	PF_bprint,							// void(string s) bprint
										// = #23;
	PF_sprint,							// void(entity client, string s)
										// sprint = #24;
	PF_dprint,							// void(string s) dprint
										// = #25;
	PF_ftos,							// void(string s) ftos              = 
										// #26;
	PF_vtos,							// void(string s) vtos              = 
										// #27;
	PF_coredump,
	PF_traceon,
	PF_traceoff,
	PF_eprint,							// void(entity e) debug print an
										// entire entity
	PF_walkmove,						// float(float yaw, float dist)
										// walkmove
	PF_Fixme,							// float(float yaw, float dist)
										// walkmove
	PF_droptofloor,
	PF_lightstyle,
	PF_rint,
	PF_floor,
	PF_ceil,
	PF_Fixme,
	PF_checkbottom,
	PF_pointcontents,
	PF_Fixme,
	PF_fabs,
	PF_aim,
	PF_cvar,
	PF_localcmd,
	PF_nextent,
	PF_Fixme,
	PF_changeyaw,
	PF_Fixme,
	PF_vectoangles,

	PF_WriteByte,
	PF_WriteChar,
	PF_WriteShort,
	PF_WriteLong,
	PF_WriteCoord,
	PF_WriteAngle,
	PF_WriteString,
	PF_WriteEntity,

	PF_Fixme,
	PF_Fixme,
	PF_Fixme,
	PF_Fixme,
	PF_Fixme,
	PF_Fixme,
	PF_Fixme,

	SV_MoveToGoal,
	PF_precache_file,
	PF_makestatic,

	PF_changelevel,
	PF_Fixme,

	PF_cvar_set,
	PF_centerprint,

	PF_ambientsound,

	PF_precache_model,
	PF_precache_sound,					// precache_sound2 is different only
										// for qcc
	PF_precache_file,

	PF_setspawnparms,

	PF_logfrag,

	PF_infokey,
	PF_stof,
	PF_multicast
};

builtin_t  *pr_builtins = pr_builtin;
int         pr_numbuiltins = sizeof (pr_builtin) / sizeof (pr_builtin[0]);