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sv_phys.c
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sv_phys.c
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/*
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.
*/
// sv_phys.c
#include "quakedef.h"
/*
pushmove objects do not obey gravity, and do not interact with each other or trigger fields, but block normal movement and push normal objects when they move.
onground is set for toss objects when they come to a complete rest. it is set for steping or walking objects
doors, plats, etc are SOLID_BSP, and MOVETYPE_PUSH
bonus items are SOLID_TRIGGER touch, and MOVETYPE_TOSS
corpses are SOLID_NOT and MOVETYPE_TOSS
crates are SOLID_BBOX and MOVETYPE_TOSS
walking monsters are SOLID_SLIDEBOX and MOVETYPE_STEP
flying/floating monsters are SOLID_SLIDEBOX and MOVETYPE_FLY
solid_edge items only clip against bsp models.
*/
cvar_t sv_friction = {"sv_friction","4",false,true};
cvar_t sv_stopspeed = {"sv_stopspeed","100"};
cvar_t sv_gravity = {"sv_gravity","800",false,true};
cvar_t sv_maxvelocity = {"sv_maxvelocity","2000"};
cvar_t sv_nostep = {"sv_nostep","0"};
#ifdef QUAKE2
static vec3_t vec_origin = {0.0, 0.0, 0.0};
#endif
#define MOVE_EPSILON 0.01
void SV_Physics_Toss (edict_t *ent);
/*
================
SV_CheckAllEnts
================
*/
void SV_CheckAllEnts (void)
{
int e;
edict_t *check;
// see if any solid entities are inside the final position
check = NEXT_EDICT(sv.edicts);
for (e=1 ; e<sv.num_edicts ; e++, check = NEXT_EDICT(check))
{
if (check->free)
continue;
if (check->v.movetype == MOVETYPE_PUSH
|| check->v.movetype == MOVETYPE_NONE
#ifdef QUAKE2
|| check->v.movetype == MOVETYPE_FOLLOW
#endif
|| check->v.movetype == MOVETYPE_NOCLIP)
continue;
if (SV_TestEntityPosition (check))
Con_Printf ("entity in invalid position\n");
}
}
/*
================
SV_CheckVelocity
================
*/
void SV_CheckVelocity (edict_t *ent)
{
int i;
//
// bound velocity
//
for (i=0 ; i<3 ; i++)
{
if (IS_NAN(ent->v.velocity[i]))
{
Con_Printf ("Got a NaN velocity on %s\n", pr_strings + ent->v.classname);
ent->v.velocity[i] = 0;
}
if (IS_NAN(ent->v.origin[i]))
{
Con_Printf ("Got a NaN origin on %s\n", pr_strings + ent->v.classname);
ent->v.origin[i] = 0;
}
if (ent->v.velocity[i] > sv_maxvelocity.value)
ent->v.velocity[i] = sv_maxvelocity.value;
else if (ent->v.velocity[i] < -sv_maxvelocity.value)
ent->v.velocity[i] = -sv_maxvelocity.value;
}
}
/*
=============
SV_RunThink
Runs thinking code if time. There is some play in the exact time the think
function will be called, because it is called before any movement is done
in a frame. Not used for pushmove objects, because they must be exact.
Returns false if the entity removed itself.
=============
*/
qboolean SV_RunThink (edict_t *ent)
{
float thinktime;
thinktime = ent->v.nextthink;
if (thinktime <= 0 || thinktime > sv.time + host_frametime)
return true;
if (thinktime < sv.time)
thinktime = sv.time; // don't let things stay in the past.
// it is possible to start that way
// by a trigger with a local time.
ent->v.nextthink = 0;
pr_global_struct->time = thinktime;
pr_global_struct->self = EDICT_TO_PROG(ent);
pr_global_struct->other = EDICT_TO_PROG(sv.edicts);
PR_ExecuteProgram (ent->v.think);
return !ent->free;
}
/*
==================
SV_Impact
Two entities have touched, so run their touch functions
==================
*/
void SV_Impact (edict_t *e1, edict_t *e2)
{
int old_self, old_other;
old_self = pr_global_struct->self;
old_other = pr_global_struct->other;
pr_global_struct->time = sv.time;
if (e1->v.touch && e1->v.solid != SOLID_NOT)
{
pr_global_struct->self = EDICT_TO_PROG(e1);
pr_global_struct->other = EDICT_TO_PROG(e2);
PR_ExecuteProgram (e1->v.touch);
}
if (e2->v.touch && e2->v.solid != SOLID_NOT)
{
pr_global_struct->self = EDICT_TO_PROG(e2);
pr_global_struct->other = EDICT_TO_PROG(e1);
PR_ExecuteProgram (e2->v.touch);
}
pr_global_struct->self = old_self;
pr_global_struct->other = old_other;
}
/*
==================
ClipVelocity
Slide off of the impacting object
returns the blocked flags (1 = floor, 2 = step / wall)
==================
*/
#define STOP_EPSILON 0.1
int ClipVelocity (vec3_t in, vec3_t normal, vec3_t out, float overbounce)
{
float backoff;
float change;
int i, blocked;
blocked = 0;
if (normal[2] > 0)
blocked |= 1; // floor
if (!normal[2])
blocked |= 2; // step
backoff = DotProduct (in, normal) * overbounce;
for (i=0 ; i<3 ; i++)
{
change = normal[i]*backoff;
out[i] = in[i] - change;
if (out[i] > -STOP_EPSILON && out[i] < STOP_EPSILON)
out[i] = 0;
}
return blocked;
}
/*
============
SV_FlyMove
The basic solid body movement clip that slides along multiple planes
Returns the clipflags if the velocity was modified (hit something solid)
1 = floor
2 = wall / step
4 = dead stop
If steptrace is not NULL, the trace of any vertical wall hit will be stored
============
*/
#define MAX_CLIP_PLANES 5
int SV_FlyMove (edict_t *ent, float time, trace_t *steptrace)
{
int bumpcount, numbumps;
vec3_t dir;
float d;
int numplanes;
vec3_t planes[MAX_CLIP_PLANES];
vec3_t primal_velocity, original_velocity, new_velocity;
int i, j;
trace_t trace;
vec3_t end;
float time_left;
int blocked;
numbumps = 4;
blocked = 0;
VectorCopy (ent->v.velocity, original_velocity);
VectorCopy (ent->v.velocity, primal_velocity);
numplanes = 0;
time_left = time;
for (bumpcount=0 ; bumpcount<numbumps ; bumpcount++)
{
if (!ent->v.velocity[0] && !ent->v.velocity[1] && !ent->v.velocity[2])
break;
for (i=0 ; i<3 ; i++)
end[i] = ent->v.origin[i] + time_left * ent->v.velocity[i];
trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, false, ent);
if (trace.allsolid)
{ // entity is trapped in another solid
VectorCopy (vec3_origin, ent->v.velocity);
return 3;
}
if (trace.fraction > 0)
{ // actually covered some distance
VectorCopy (trace.endpos, ent->v.origin);
VectorCopy (ent->v.velocity, original_velocity);
numplanes = 0;
}
if (trace.fraction == 1)
break; // moved the entire distance
if (!trace.ent)
Sys_Error ("SV_FlyMove: !trace.ent");
if (trace.plane.normal[2] > 0.7)
{
blocked |= 1; // floor
if (trace.ent->v.solid == SOLID_BSP)
{
ent->v.flags = (int)ent->v.flags | FL_ONGROUND;
ent->v.groundentity = EDICT_TO_PROG(trace.ent);
}
}
if (!trace.plane.normal[2])
{
blocked |= 2; // step
if (steptrace)
*steptrace = trace; // save for player extrafriction
}
//
// run the impact function
//
SV_Impact (ent, trace.ent);
if (ent->free)
break; // removed by the impact function
time_left -= time_left * trace.fraction;
// cliped to another plane
if (numplanes >= MAX_CLIP_PLANES)
{ // this shouldn't really happen
VectorCopy (vec3_origin, ent->v.velocity);
return 3;
}
VectorCopy (trace.plane.normal, planes[numplanes]);
numplanes++;
//
// modify original_velocity so it parallels all of the clip planes
//
for (i=0 ; i<numplanes ; i++)
{
ClipVelocity (original_velocity, planes[i], new_velocity, 1);
for (j=0 ; j<numplanes ; j++)
if (j != i)
{
if (DotProduct (new_velocity, planes[j]) < 0)
break; // not ok
}
if (j == numplanes)
break;
}
if (i != numplanes)
{ // go along this plane
VectorCopy (new_velocity, ent->v.velocity);
}
else
{ // go along the crease
if (numplanes != 2)
{
// Con_Printf ("clip velocity, numplanes == %i\n",numplanes);
VectorCopy (vec3_origin, ent->v.velocity);
return 7;
}
CrossProduct (planes[0], planes[1], dir);
d = DotProduct (dir, ent->v.velocity);
VectorScale (dir, d, ent->v.velocity);
}
//
// if original velocity is against the original velocity, stop dead
// to avoid tiny occilations in sloping corners
//
if (DotProduct (ent->v.velocity, primal_velocity) <= 0)
{
VectorCopy (vec3_origin, ent->v.velocity);
return blocked;
}
}
return blocked;
}
/*
============
SV_AddGravity
============
*/
void SV_AddGravity (edict_t *ent)
{
float ent_gravity;
#ifdef QUAKE2
if (ent->v.gravity)
ent_gravity = ent->v.gravity;
else
ent_gravity = 1.0;
#else
eval_t *val;
val = GetEdictFieldValue(ent, "gravity");
if (val && val->_float)
ent_gravity = val->_float;
else
ent_gravity = 1.0;
#endif
ent->v.velocity[2] -= ent_gravity * sv_gravity.value * host_frametime;
}
/*
===============================================================================
PUSHMOVE
===============================================================================
*/
/*
============
SV_PushEntity
Does not change the entities velocity at all
============
*/
trace_t SV_PushEntity (edict_t *ent, vec3_t push)
{
trace_t trace;
vec3_t end;
VectorAdd (ent->v.origin, push, end);
if (ent->v.movetype == MOVETYPE_FLYMISSILE)
trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, MOVE_MISSILE, ent);
else if (ent->v.solid == SOLID_TRIGGER || ent->v.solid == SOLID_NOT)
// only clip against bmodels
trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, MOVE_NOMONSTERS, ent);
else
trace = SV_Move (ent->v.origin, ent->v.mins, ent->v.maxs, end, MOVE_NORMAL, ent);
VectorCopy (trace.endpos, ent->v.origin);
SV_LinkEdict (ent, true);
if (trace.ent)
SV_Impact (ent, trace.ent);
return trace;
}
/*
============
SV_PushMove
============
*/
void SV_PushMove (edict_t *pusher, float movetime)
{
int i, e;
edict_t *check, *block;
vec3_t mins, maxs, move;
vec3_t entorig, pushorig;
int num_moved;
edict_t *moved_edict[MAX_EDICTS];
vec3_t moved_from[MAX_EDICTS];
if (!pusher->v.velocity[0] && !pusher->v.velocity[1] && !pusher->v.velocity[2])
{
pusher->v.ltime += movetime;
return;
}
for (i=0 ; i<3 ; i++)
{
move[i] = pusher->v.velocity[i] * movetime;
mins[i] = pusher->v.absmin[i] + move[i];
maxs[i] = pusher->v.absmax[i] + move[i];
}
VectorCopy (pusher->v.origin, pushorig);
// move the pusher to it's final position
VectorAdd (pusher->v.origin, move, pusher->v.origin);
pusher->v.ltime += movetime;
SV_LinkEdict (pusher, false);
// see if any solid entities are inside the final position
num_moved = 0;
check = NEXT_EDICT(sv.edicts);
for (e=1 ; e<sv.num_edicts ; e++, check = NEXT_EDICT(check))
{
if (check->free)
continue;
if (check->v.movetype == MOVETYPE_PUSH
|| check->v.movetype == MOVETYPE_NONE
#ifdef QUAKE2
|| check->v.movetype == MOVETYPE_FOLLOW
#endif
|| check->v.movetype == MOVETYPE_NOCLIP)
continue;
// if the entity is standing on the pusher, it will definately be moved
if ( ! ( ((int)check->v.flags & FL_ONGROUND)
&& PROG_TO_EDICT(check->v.groundentity) == pusher) )
{
if ( check->v.absmin[0] >= maxs[0]
|| check->v.absmin[1] >= maxs[1]
|| check->v.absmin[2] >= maxs[2]
|| check->v.absmax[0] <= mins[0]
|| check->v.absmax[1] <= mins[1]
|| check->v.absmax[2] <= mins[2] )
continue;
// see if the ent's bbox is inside the pusher's final position
if (!SV_TestEntityPosition (check))
continue;
}
// remove the onground flag for non-players
if (check->v.movetype != MOVETYPE_WALK)
check->v.flags = (int)check->v.flags & ~FL_ONGROUND;
VectorCopy (check->v.origin, entorig);
VectorCopy (check->v.origin, moved_from[num_moved]);
moved_edict[num_moved] = check;
num_moved++;
// try moving the contacted entity
pusher->v.solid = SOLID_NOT;
SV_PushEntity (check, move);
pusher->v.solid = SOLID_BSP;
// if it is still inside the pusher, block
block = SV_TestEntityPosition (check);
if (block)
{ // fail the move
if (check->v.mins[0] == check->v.maxs[0])
continue;
if (check->v.solid == SOLID_NOT || check->v.solid == SOLID_TRIGGER)
{ // corpse
check->v.mins[0] = check->v.mins[1] = 0;
VectorCopy (check->v.mins, check->v.maxs);
continue;
}
VectorCopy (entorig, check->v.origin);
SV_LinkEdict (check, true);
VectorCopy (pushorig, pusher->v.origin);
SV_LinkEdict (pusher, false);
pusher->v.ltime -= movetime;
// if the pusher has a "blocked" function, call it
// otherwise, just stay in place until the obstacle is gone
if (pusher->v.blocked)
{
pr_global_struct->self = EDICT_TO_PROG(pusher);
pr_global_struct->other = EDICT_TO_PROG(check);
PR_ExecuteProgram (pusher->v.blocked);
}
// move back any entities we already moved
for (i=0 ; i<num_moved ; i++)
{
VectorCopy (moved_from[i], moved_edict[i]->v.origin);
SV_LinkEdict (moved_edict[i], false);
}
return;
}
}
}
#ifdef QUAKE2
/*
============
SV_PushRotate
============
*/
void SV_PushRotate (edict_t *pusher, float movetime)
{
int i, e;
edict_t *check, *block;
vec3_t move, a, amove;
vec3_t entorig, pushorig;
int num_moved;
edict_t *moved_edict[MAX_EDICTS];
vec3_t moved_from[MAX_EDICTS];
vec3_t org, org2;
vec3_t forward, right, up;
if (!pusher->v.avelocity[0] && !pusher->v.avelocity[1] && !pusher->v.avelocity[2])
{
pusher->v.ltime += movetime;
return;
}
for (i=0 ; i<3 ; i++)
amove[i] = pusher->v.avelocity[i] * movetime;
VectorSubtract (vec3_origin, amove, a);
AngleVectors (a, forward, right, up);
VectorCopy (pusher->v.angles, pushorig);
// move the pusher to it's final position
VectorAdd (pusher->v.angles, amove, pusher->v.angles);
pusher->v.ltime += movetime;
SV_LinkEdict (pusher, false);
// see if any solid entities are inside the final position
num_moved = 0;
check = NEXT_EDICT(sv.edicts);
for (e=1 ; e<sv.num_edicts ; e++, check = NEXT_EDICT(check))
{
if (check->free)
continue;
if (check->v.movetype == MOVETYPE_PUSH
|| check->v.movetype == MOVETYPE_NONE
|| check->v.movetype == MOVETYPE_FOLLOW
|| check->v.movetype == MOVETYPE_NOCLIP)
continue;
// if the entity is standing on the pusher, it will definately be moved
if ( ! ( ((int)check->v.flags & FL_ONGROUND)
&& PROG_TO_EDICT(check->v.groundentity) == pusher) )
{
if ( check->v.absmin[0] >= pusher->v.absmax[0]
|| check->v.absmin[1] >= pusher->v.absmax[1]
|| check->v.absmin[2] >= pusher->v.absmax[2]
|| check->v.absmax[0] <= pusher->v.absmin[0]
|| check->v.absmax[1] <= pusher->v.absmin[1]
|| check->v.absmax[2] <= pusher->v.absmin[2] )
continue;
// see if the ent's bbox is inside the pusher's final position
if (!SV_TestEntityPosition (check))
continue;
}
// remove the onground flag for non-players
if (check->v.movetype != MOVETYPE_WALK)
check->v.flags = (int)check->v.flags & ~FL_ONGROUND;
VectorCopy (check->v.origin, entorig);
VectorCopy (check->v.origin, moved_from[num_moved]);
moved_edict[num_moved] = check;
num_moved++;
// calculate destination position
VectorSubtract (check->v.origin, pusher->v.origin, org);
org2[0] = DotProduct (org, forward);
org2[1] = -DotProduct (org, right);
org2[2] = DotProduct (org, up);
VectorSubtract (org2, org, move);
// try moving the contacted entity
pusher->v.solid = SOLID_NOT;
SV_PushEntity (check, move);
pusher->v.solid = SOLID_BSP;
// if it is still inside the pusher, block
block = SV_TestEntityPosition (check);
if (block)
{ // fail the move
if (check->v.mins[0] == check->v.maxs[0])
continue;
if (check->v.solid == SOLID_NOT || check->v.solid == SOLID_TRIGGER)
{ // corpse
check->v.mins[0] = check->v.mins[1] = 0;
VectorCopy (check->v.mins, check->v.maxs);
continue;
}
VectorCopy (entorig, check->v.origin);
SV_LinkEdict (check, true);
VectorCopy (pushorig, pusher->v.angles);
SV_LinkEdict (pusher, false);
pusher->v.ltime -= movetime;
// if the pusher has a "blocked" function, call it
// otherwise, just stay in place until the obstacle is gone
if (pusher->v.blocked)
{
pr_global_struct->self = EDICT_TO_PROG(pusher);
pr_global_struct->other = EDICT_TO_PROG(check);
PR_ExecuteProgram (pusher->v.blocked);
}
// move back any entities we already moved
for (i=0 ; i<num_moved ; i++)
{
VectorCopy (moved_from[i], moved_edict[i]->v.origin);
VectorSubtract (moved_edict[i]->v.angles, amove, moved_edict[i]->v.angles);
SV_LinkEdict (moved_edict[i], false);
}
return;
}
else
{
VectorAdd (check->v.angles, amove, check->v.angles);
}
}
}
#endif
/*
================
SV_Physics_Pusher
================
*/
void SV_Physics_Pusher (edict_t *ent)
{
float thinktime;
float oldltime;
float movetime;
oldltime = ent->v.ltime;
thinktime = ent->v.nextthink;
if (thinktime < ent->v.ltime + host_frametime)
{
movetime = thinktime - ent->v.ltime;
if (movetime < 0)
movetime = 0;
}
else
movetime = host_frametime;
if (movetime)
{
#ifdef QUAKE2
if (ent->v.avelocity[0] || ent->v.avelocity[1] || ent->v.avelocity[2])
SV_PushRotate (ent, movetime);
else
#endif
SV_PushMove (ent, movetime); // advances ent->v.ltime if not blocked
}
if (thinktime > oldltime && thinktime <= ent->v.ltime)
{
ent->v.nextthink = 0;
pr_global_struct->time = sv.time;
pr_global_struct->self = EDICT_TO_PROG(ent);
pr_global_struct->other = EDICT_TO_PROG(sv.edicts);
PR_ExecuteProgram (ent->v.think);
if (ent->free)
return;
}
}
/*
===============================================================================
CLIENT MOVEMENT
===============================================================================
*/
/*
=============
SV_CheckStuck
This is a big hack to try and fix the rare case of getting stuck in the world
clipping hull.
=============
*/
void SV_CheckStuck (edict_t *ent)
{
int i, j;
int z;
vec3_t org;
if (!SV_TestEntityPosition(ent))
{
VectorCopy (ent->v.origin, ent->v.oldorigin);
return;
}
VectorCopy (ent->v.origin, org);
VectorCopy (ent->v.oldorigin, ent->v.origin);
if (!SV_TestEntityPosition(ent))
{
Con_DPrintf ("Unstuck.\n");
SV_LinkEdict (ent, true);
return;
}
for (z=0 ; z< 18 ; z++)
for (i=-1 ; i <= 1 ; i++)
for (j=-1 ; j <= 1 ; j++)
{
ent->v.origin[0] = org[0] + i;
ent->v.origin[1] = org[1] + j;
ent->v.origin[2] = org[2] + z;
if (!SV_TestEntityPosition(ent))
{
Con_DPrintf ("Unstuck.\n");
SV_LinkEdict (ent, true);
return;
}
}
VectorCopy (org, ent->v.origin);
Con_DPrintf ("player is stuck.\n");
}
/*
=============
SV_CheckWater
=============
*/
qboolean SV_CheckWater (edict_t *ent)
{
vec3_t point;
int cont;
#ifdef QUAKE2
int truecont;
#endif
point[0] = ent->v.origin[0];
point[1] = ent->v.origin[1];
point[2] = ent->v.origin[2] + ent->v.mins[2] + 1;
ent->v.waterlevel = 0;
ent->v.watertype = CONTENTS_EMPTY;
cont = SV_PointContents (point);
if (cont <= CONTENTS_WATER)
{
#ifdef QUAKE2
truecont = SV_TruePointContents (point);
#endif
ent->v.watertype = cont;
ent->v.waterlevel = 1;
point[2] = ent->v.origin[2] + (ent->v.mins[2] + ent->v.maxs[2])*0.5;
cont = SV_PointContents (point);
if (cont <= CONTENTS_WATER)
{
ent->v.waterlevel = 2;
point[2] = ent->v.origin[2] + ent->v.view_ofs[2];
cont = SV_PointContents (point);
if (cont <= CONTENTS_WATER)
ent->v.waterlevel = 3;
}
#ifdef QUAKE2
if (truecont <= CONTENTS_CURRENT_0 && truecont >= CONTENTS_CURRENT_DOWN)
{
static vec3_t current_table[] =
{
{1, 0, 0},
{0, 1, 0},
{-1, 0, 0},
{0, -1, 0},
{0, 0, 1},
{0, 0, -1}
};
VectorMA (ent->v.basevelocity, 150.0*ent->v.waterlevel/3.0, current_table[CONTENTS_CURRENT_0 - truecont], ent->v.basevelocity);
}
#endif
}
return ent->v.waterlevel > 1;
}
/*
============
SV_WallFriction
============
*/
void SV_WallFriction (edict_t *ent, trace_t *trace)
{
vec3_t forward, right, up;
float d, i;
vec3_t into, side;
AngleVectors (ent->v.v_angle, forward, right, up);
d = DotProduct (trace->plane.normal, forward);
d += 0.5;
if (d >= 0)
return;
// cut the tangential velocity
i = DotProduct (trace->plane.normal, ent->v.velocity);
VectorScale (trace->plane.normal, i, into);
VectorSubtract (ent->v.velocity, into, side);
ent->v.velocity[0] = side[0] * (1 + d);
ent->v.velocity[1] = side[1] * (1 + d);
}
/*
=====================
SV_TryUnstick
Player has come to a dead stop, possibly due to the problem with limited
float precision at some angle joins in the BSP hull.
Try fixing by pushing one pixel in each direction.
This is a hack, but in the interest of good gameplay...
======================
*/
int SV_TryUnstick (edict_t *ent, vec3_t oldvel)
{
int i;
vec3_t oldorg;
vec3_t dir;
int clip;
trace_t steptrace;
VectorCopy (ent->v.origin, oldorg);
VectorCopy (vec3_origin, dir);
for (i=0 ; i<8 ; i++)
{
// try pushing a little in an axial direction
switch (i)
{
case 0: dir[0] = 2; dir[1] = 0; break;
case 1: dir[0] = 0; dir[1] = 2; break;
case 2: dir[0] = -2; dir[1] = 0; break;
case 3: dir[0] = 0; dir[1] = -2; break;
case 4: dir[0] = 2; dir[1] = 2; break;
case 5: dir[0] = -2; dir[1] = 2; break;
case 6: dir[0] = 2; dir[1] = -2; break;
case 7: dir[0] = -2; dir[1] = -2; break;
}
SV_PushEntity (ent, dir);
// retry the original move
ent->v.velocity[0] = oldvel[0];
ent->v. velocity[1] = oldvel[1];
ent->v. velocity[2] = 0;
clip = SV_FlyMove (ent, 0.1, &steptrace);
if ( fabs(oldorg[1] - ent->v.origin[1]) > 4
|| fabs(oldorg[0] - ent->v.origin[0]) > 4 )
{
//Con_DPrintf ("unstuck!\n");
return clip;
}
// go back to the original pos and try again
VectorCopy (oldorg, ent->v.origin);
}
VectorCopy (vec3_origin, ent->v.velocity);
return 7; // still not moving
}
/*
=====================
SV_WalkMove
Only used by players
======================
*/
#define STEPSIZE 18
void SV_WalkMove (edict_t *ent)
{
vec3_t upmove, downmove;
vec3_t oldorg, oldvel;
vec3_t nosteporg, nostepvel;
int clip;
int oldonground;
trace_t steptrace, downtrace;
//
// do a regular slide move unless it looks like you ran into a step
//
oldonground = (int)ent->v.flags & FL_ONGROUND;
ent->v.flags = (int)ent->v.flags & ~FL_ONGROUND;
VectorCopy (ent->v.origin, oldorg);
VectorCopy (ent->v.velocity, oldvel);
clip = SV_FlyMove (ent, host_frametime, &steptrace);
if ( !(clip & 2) )
return; // move didn't block on a step
if (!oldonground && ent->v.waterlevel == 0)
return; // don't stair up while jumping
if (ent->v.movetype != MOVETYPE_WALK)
return; // gibbed by a trigger
if (sv_nostep.value)
return;
if ( (int)sv_player->v.flags & FL_WATERJUMP )
return;
VectorCopy (ent->v.origin, nosteporg);
VectorCopy (ent->v.velocity, nostepvel);
//
// try moving up and forward to go up a step
//
VectorCopy (oldorg, ent->v.origin); // back to start pos