Source to 321/game/g_chase.c
/*
Copyright (C) 1997-2001 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.
*/
#include "g_local.h"
void UpdateChaseCam(edict_t *ent)
{
vec3_t o, ownerv, goal;
edict_t *targ;
vec3_t forward, right;
trace_t trace;
int i;
vec3_t oldgoal;
vec3_t angles;
// is our chase target gone?
if (!ent->client->chase_target->inuse
|| ent->client->chase_target->client->resp.spectator) {
edict_t *old = ent->client->chase_target;
ChaseNext(ent);
if (ent->client->chase_target == old) {
ent->client->chase_target = NULL;
ent->client->ps.pmove.pm_flags &= ~PMF_NO_PREDICTION;
return;
}
}
targ = ent->client->chase_target;
VectorCopy(targ->s.origin, ownerv);
VectorCopy(ent->s.origin, oldgoal);
ownerv[2] += targ->viewheight;
VectorCopy(targ->client->v_angle, angles);
if (angles[PITCH] > 56)
angles[PITCH] = 56;
AngleVectors (angles, forward, right, NULL);
VectorNormalize(forward);
VectorMA(ownerv, -30, forward, o);
if (o[2] < targ->s.origin[2] + 20)
o[2] = targ->s.origin[2] + 20;
// jump animation lifts
if (!targ->groundentity)
o[2] += 16;
trace = gi.trace(ownerv, vec3_origin, vec3_origin, o, targ, MASK_SOLID);
VectorCopy(trace.endpos, goal);
VectorMA(goal, 2, forward, goal);
// pad for floors and ceilings
VectorCopy(goal, o);
o[2] += 6;
trace = gi.trace(goal, vec3_origin, vec3_origin, o, targ, MASK_SOLID);
if (trace.fraction < 1) {
VectorCopy(trace.endpos, goal);
goal[2] -= 6;
}
VectorCopy(goal, o);
o[2] -= 6;
trace = gi.trace(goal, vec3_origin, vec3_origin, o, targ, MASK_SOLID);
if (trace.fraction < 1) {
VectorCopy(trace.endpos, goal);
goal[2] += 6;
}
if (targ->deadflag)
ent->client->ps.pmove.pm_type = PM_DEAD;
else
ent->client->ps.pmove.pm_type = PM_FREEZE;
VectorCopy(goal, ent->s.origin);
for (i=0 ; i<3 ; i++)
ent->client->ps.pmove.delta_angles[i] = ANGLE2SHORT(targ->client->v_angle[i] - ent->client->resp.cmd_angles[i]);
if (targ->deadflag) {
ent->client->ps.viewangles[ROLL] = 40;
ent->client->ps.viewangles[PITCH] = -15;
ent->client->ps.viewangles[YAW] = targ->client->killer_yaw;
} else {
VectorCopy(targ->client->v_angle, ent->client->ps.viewangles);
VectorCopy(targ->client->v_angle, ent->client->v_angle);
}
ent->viewheight = 0;
ent->client->ps.pmove.pm_flags |= PMF_NO_PREDICTION;
gi.linkentity(ent);
}
void ChaseNext(edict_t *ent)
{
int i;
edict_t *e;
if (!ent->client->chase_target)
return;
i = ent->client->chase_target - g_edicts;
do {
i++;
if (i > maxclients->value)
i = 1;
e = g_edicts + i;
if (!e->inuse)
continue;
if (!e->client->resp.spectator)
break;
} while (e != ent->client->chase_target);
ent->client->chase_target = e;
ent->client->update_chase = true;
}
void ChasePrev(edict_t *ent)
{
int i;
edict_t *e;
if (!ent->client->chase_target)
return;
i = ent->client->chase_target - g_edicts;
do {
i--;
if (i < 1)
i = maxclients->value;
e = g_edicts + i;
if (!e->inuse)
continue;
if (!e->client->resp.spectator)
break;
} while (e != ent->client->chase_target);
ent->client->chase_target = e;
ent->client->update_chase = true;
}
void GetChaseTarget(edict_t *ent)
{
int i;
edict_t *other;
for (i = 1; i <= maxclients->value; i++) {
other = g_edicts + i;
if (other->inuse && !other->client->resp.spectator) {
ent->client->chase_target = other;
ent->client->update_chase = true;
UpdateChaseCam(ent);
return;
}
}
gi.centerprintf(ent, "No other players to chase.");
}