thirtyflightsofloving/game/p_trail.c
Knightmare66 d16b46e3cf Added re-implementation of func_plat2 and func_door2 from rogue to default Lazarus DLL.
Overhauled child entity movement in default Lazarus DLL.
Added bbox versions of various triggers to default Lazarus DLL.
Added level.maptype field to default Lazarus DLL.
Added entity class IDs to default Lazarus DLL.
Incremented savegame version for default Lazarus DLL.
2020-10-27 02:00:05 -04:00

150 lines
3.1 KiB
C

/*
===========================================================================
Copyright (C) 1997-2001 Id Software, Inc.
Copyright (C) 2000-2002 Mr. Hyde and Mad Dog
This file is part of Lazarus Quake 2 Mod source code.
Lazarus Quake 2 Mod source code 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.
Lazarus Quake 2 Mod source code 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 Lazarus Quake 2 Mod source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "g_local.h"
/*
==============================================================================
PLAYER TRAIL
==============================================================================
This is a circular list containing the a list of points of where
the player has been recently. It is used by monsters for pursuit.
.origin the spot
.owner forward link
.aiment backward link
*/
#define TRAIL_LENGTH 8
edict_t *trail[TRAIL_LENGTH];
int trail_head;
qboolean trail_active = false;
#define NEXT(n) (((n) + 1) & (TRAIL_LENGTH - 1))
#define PREV(n) (((n) - 1) & (TRAIL_LENGTH - 1))
void PlayerTrail_Init (void)
{
int n;
if (deathmatch->value /* FIXME || coop */)
return;
for (n = 0; n < TRAIL_LENGTH; n++)
{
trail[n] = G_Spawn();
trail[n]->classname = "player_trail";
}
trail_head = 0;
trail_active = true;
}
void PlayerTrail_Add (vec3_t spot)
{
vec3_t temp;
if (!trail_active)
return;
VectorCopy (spot, trail[trail_head]->s.origin);
trail[trail_head]->timestamp = level.time;
VectorSubtract (spot, trail[PREV(trail_head)]->s.origin, temp);
trail[trail_head]->s.angles[1] = vectoyaw (temp);
trail_head = NEXT(trail_head);
}
void PlayerTrail_New (vec3_t spot)
{
if (!trail_active)
return;
PlayerTrail_Init ();
PlayerTrail_Add (spot);
}
edict_t *PlayerTrail_PickFirst (edict_t *self)
{
int marker;
int n;
if (!trail_active)
return NULL;
for (marker = trail_head, n = TRAIL_LENGTH; n; n--)
{
if (trail[marker]->timestamp <= self->monsterinfo.trail_time)
marker = NEXT(marker);
else
break;
}
if (visible(self, trail[marker]))
{
return trail[marker];
}
if (visible(self, trail[PREV(marker)]))
{
return trail[PREV(marker)];
}
return trail[marker];
}
edict_t *PlayerTrail_PickNext (edict_t *self)
{
int marker;
int n;
if (!trail_active)
return NULL;
for (marker = trail_head, n = TRAIL_LENGTH; n; n--)
{
if (trail[marker]->timestamp <= self->monsterinfo.trail_time)
marker = NEXT(marker);
else
break;
}
return trail[marker];
}
edict_t *PlayerTrail_LastSpot (void)
{
return trail[PREV(trail_head)];
}