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HOVACTS.C
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HOVACTS.C
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/* Hovertank 3-D Source Code
* Copyright (C) 1993-2014 Flat Rock Software
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "HOVERDEF.H"
//==========================================================================
#define GUNARM 50
#define GUNCHARGE 70
#define EXPLODEANM 8
#define SHOTSPEED 8192l
#define MSHOTSPEED 6000l
#define REFUGEEANM 30
#define WARPANM 10
#define SPDMUTANT 2500l
#define MUTANTANM 20
#define MUTANTATTACK 120
#define SPDDRONE 16384l
#define DRONEANM 10
#define TANKRELOAD 200
#define ANGLESTEP 1
#define PLAYERTHRUST 4096l
#define PLAYERREVERSE 2048l
#define PLAYERAFTERBURN 8192l
#define SHIELDANM 10
#define MINCHASE 4096
dirtype opposite[9] =
{south,southwest,west,northwest,north,northeast,east,southeast,nodir};
//==========================================================================
enum {rearming,ready,charging,maxpower} gunstate;
int guncount;
//==========================================================================
void SpawnPlayer (fixed gx, fixed gy);
void GetRefugee (objtype *hit);
void CheckFire (void);
void DamagePlayer (void);
void Thrust (void);
void Reverse (void);
void AfterBurn (void);
void PlayerThink (void);
void SpawnShot (fixed gx, fixed gy, int angle, classtype _class);
void ExplodeShot(void);
int ClipPointMove (void);
void ShotThink (void);
void InertThink (void);
void ExplodeThink (void);
void SpawnWarp (fixed gx, fixed gy);
void WarpThink (void);
void SpawnRefugee (fixed gx, fixed gy,int sex);
void KillRefugee (objtype *hit);
void RefugeeThink (void);
void SpawnDrone (fixed gx, fixed gy);
void KillDrone (objtype *hit);
void DroneThink (void);
void SpawnTank (fixed gx, fixed gy);
void KillTank (objtype *hit);
void AimAtPlayer (void);
void TankThink (void);
void SpawnMutant (fixed gx, fixed gy);
void KillMutant (objtype *hit);
int Walk (void);
void ChaseThing (objtype *chase);
void MutantThink (void);
void SpawnShield (fixed gx, fixed gy);
void ShieldThink (void);
/*
=============================================================================
PLAYER
=============================================================================
*/
/*
===================
=
= SpawnPlayer
=
===================
*/
void SpawnPlayer (fixed gx, fixed gy)
{
objlist[0].x = gx;
objlist[0].y = gy;
objlist[0].angle = 0;
objlist[0].think = PlayerThink;
objlist[0]._class = playerobj;
objlist[0].size = MINDIST;
objlist[0].radarcolor = 15;
objlist[0].hitpoints = 3;
objlist[0].xl = objlist[0].x - objlist[0].size;
objlist[0].xh = objlist[0].x + objlist[0].size;
objlist[0].yl = objlist[0].y - objlist[0].size;
objlist[0].yh = objlist[0].y + objlist[0].size;
gunstate = ready;
}
/*
===================
=
= GetRefugee
=
===================
*/
void GetRefugee (objtype *hit)
{
PlaySound (SAVEHOSTAGESND);
hit->_class = nothing;
if (hit->radarx)
XPlot (hit->radarx,hit->radary,hit->radarcolor);
DrawPic (2*savedcount+1,6,SAVEDGUYPIC);
savedcount++;
if (!--numrefugees)
{
PlaySound (LASTHOSTAGESND);
SpawnWarp (warpx,warpy);
}
}
/*
===================
=
= CheckFire
=
===================
*/
void CheckFire (void)
{
if (gunstate == rearming)
{
if ( (guncount+=tics) > GUNARM)
{
gunstate = ready;
PlaySound(GUNREADYSND);
DrawPic (14,40,READYPIC);
}
return;
}
if (c.button1)
{
// holding down button
if (gunstate==ready)
{
gunstate = charging;
DrawPic (14,40,CHARGINGPIC);
guncount = 0;
}
if ( gunstate == charging && (guncount+=tics) > GUNCHARGE)
{
PlaySound(MAXPOWERSND);
gunstate = maxpower;
DrawPic (14,40,MAXPOWERPIC);
}
}
else
// button up
if (gunstate>ready) // fire small shot if charging, large if maxed
{
DrawPic (14,40,REARMINGPIC);
guncount = 0;
SpawnShot (obon.x,obon.y,obon.angle,(classtype)(pshotobj+(gunstate-charging)));
gunstate = rearming;
PlaySound (FIRESND);
}
}
/*
===================
=
= DamagePlayer
=
===================
*/
void DamagePlayer (void)
{
PlaySound (TAKEDAMAGESND);
if (!godmode && !--objlist[0].hitpoints)
{
PlaySound(PLAYERDEADSND);
while (SoundPlaying())
;
leveldone = -1; // all hit points gone
}
else
DrawPic (24,36,SHIELDLOWPIC+1-objlist[0].hitpoints);
ColorBorder(12);
bordertime = 60;
}
void HealPlayer (void)
{
PlaySound (ARMORUPSND);
if (objlist[0].hitpoints<3)
objlist[0].hitpoints++;
DrawPic (24,36,SHIELDLOWPIC+1-objlist[0].hitpoints);
ColorBorder(9);
bordertime = 60;
}
/*
===================
=
= Thrust
=
===================
*/
void Thrust (void)
{
xmove = FixedByFrac(PLAYERTHRUST*tics,costable[obon.angle]);
ymove = -FixedByFrac(PLAYERTHRUST*tics,sintable[obon.angle]);
ClipMove();
}
/*
===================
=
= Reverse
=
===================
*/
void Reverse (void)
{
xmove = -FixedByFrac(PLAYERREVERSE*tics,costable[obon.angle]);
ymove = FixedByFrac(PLAYERREVERSE*tics,sintable[obon.angle]);
ClipMove();
}
/*
===================
=
= AfterBurn
=
===================
*/
void AfterBurn (void)
{
xmove = FixedByFrac(PLAYERAFTERBURN*tics,costable[obon.angle]);
ymove = -FixedByFrac(PLAYERAFTERBURN*tics,sintable[obon.angle]);
ClipMove();
if (!SoundPlaying())
PlaySound(AFTERBURNSND);
}
void BeforeBurn (void)
{
xmove = -FixedByFrac(PLAYERAFTERBURN*tics,costable[obon.angle]);
ymove = FixedByFrac(PLAYERAFTERBURN*tics,sintable[obon.angle]);
ClipMove();
if (!SoundPlaying())
PlaySound(AFTERBURNSND);
}
/*
===================
=
= PlayerThink
=
===================
*/
void PlayerThink (void)
{
int anglechange;
objtype *check;
if (c.button1) // hold down fire for slow adjust
{
if (tics<=4)
{
anglechange = ANGLESTEP*tics/2;
if (!anglechange)
anglechange=1;
}
else
anglechange = ANGLESTEP*2;
}
else
anglechange = ANGLESTEP*tics;
if (c.dir==west || c.dir==northwest || c.dir==southwest)
{
obon.angle+=anglechange;
if ( obon.angle >= ANGLES )
obon.angle -= ANGLES;
}
else if (c.dir==east || c.dir==northeast || c.dir==southeast)
{
obon.angle-=anglechange;
if ( obon.angle < 0)
obon.angle += ANGLES;
}
if (c.button2 && (c.dir==south || c.dir==southeast || c.dir==southwest) )
BeforeBurn();
else if (c.button2)
AfterBurn();
else if (c.dir==north || c.dir==northeast || c.dir==northwest)
Thrust();
else if (c.dir==south || c.dir==southeast || c.dir==southwest)
Reverse();
CheckFire ();
for (check = &objlist[1];check<=lastobj;check++)
if
(check->_class
&& check->xl <= obon.xh
&& check->xh >= obon.xl
&& check->yl <= obon.yh
&& check->yh >= obon.yl)
{
switch (check->_class)
{
case refugeeobj:
GetRefugee (check);
break;
case shieldobj:
objlist[0] = obon;
HealPlayer ();
obon = objlist[0];
check->_class = nothing;
if (check->radarx)
XPlot (check->radarx,check->radary,check->radarcolor);
break;
case warpobj:
leveldone = 1;
break;
}
}
StartView(); // calculate view position and trace walls
// FinishView in PlayLoop draws everything
}
/*
=============================================================================
SHOTS
=============================================================================
*/
/*
====================
=
= SpawnShot
=
====================
*/
void SpawnShot (fixed gx, fixed gy, int angle, classtype _class)
{
FindFreeObj();
_new->x = gx;
_new->y = gy;
_new->angle = angle;
_new->think = ShotThink;
_new->_class = _class;
_new->size = TILEGLOBAL/8;
switch (_class)
{
case pshotobj:
_new->shapenum = PSHOTPIC;
_new->speed = SHOTSPEED;
break;
case pbigshotobj:
_new->shapenum = BIGSHOTPIC;
_new->speed = SHOTSPEED;
break;
case mshotobj:
_new->shapenum = MSHOTPIC;
_new->speed = MSHOTSPEED;
break;
}
CalcBoundsNew();
}
/*
===================
=
= ExplodeShot
=
===================
*/
void ExplodeShot(void)
{
PlaySound (SHOOTWALLSND);
obon._class = inertobj;
obon.shapenum = obon.temp1 = SHOTDIE1PIC;
obon.think = ExplodeThink;
obon.stage = 0;
TransformObon();
}
/*
====================
=
= ClipPointMove
=
====================
*/
#define SHOTCLIP 0x1000 // explode 1/16th tile from wall
int ClipPointMove (void)
{
int xt,yt;
fixed xclipdist,yclipdist,intersect,basex,basey;
fixed inside,total;
xmove = FixedByFrac(obon.speed*tics,costable[obon.angle]);
if (xmove<0)
xmove=-(fixed)(-xmove);
ymove = -FixedByFrac(obon.speed*tics,sintable[obon.angle]);
if (ymove<0)
ymove=-(fixed)(-ymove);
obon.x += xmove;
obon.y += ymove;
xt = obon.x>>TILESHIFT;
yt = obon.y>>TILESHIFT;
if (!tilemap[xt][yt])
return 0;
//
// intersect the path with the tile edges to determine point of impact
//
basex = obon.x & 0xffff0000;
basey = obon.y & 0xffff0000;
obon.x &= 0xffff; // move origin to ul corner of tile
obon.y &= 0xffff;
if (xmove>0)
{
inside = obon.x;
total = xmove;
intersect = obon.y - ymove*inside/total;
if (intersect <= TILEGLOBAL)
{
obon.x = basex - SHOTCLIP;
obon.y = basey + intersect;
return 1;
}
}
else if (xmove<0)
{
inside = TILEGLOBAL-obon.x;
total = -xmove;
intersect = obon.y - ymove*inside/total;
if (intersect <= TILEGLOBAL)
{
obon.x = basex + TILEGLOBAL + SHOTCLIP;
obon.y = basey + intersect;
return 1;
}
}
if (ymove>0)
{
inside = obon.y;
total = ymove;
intersect = obon.x - xmove*inside/total;
if (intersect <= TILEGLOBAL)
{
obon.x = basex + intersect;
obon.y = basey - SHOTCLIP;
return 1;
}
}
else if (ymove < 0)
{
inside = TILEGLOBAL-obon.y;
total = -ymove;
intersect = obon.x - xmove*inside/total;
if (intersect <= TILEGLOBAL)
{
obon.x = basex + intersect;
obon.y = basey + TILEGLOBAL + SHOTCLIP;
return 1;
}
}
return 1;
}
/*
===================
=
= ShotThink
=
===================
*/
void ShotThink (void)
{
int i,xt,yt;
objtype *check;
for (i=0;i<3;i++) // so it can move over one tile distance
{
if (ClipPointMove())
{
ExplodeShot();
return;
}
CalcBounds();
for (check = &objlist[0];check<=lastobj;check++)
if
(check->_class
&& check->xl <= obon.xh
&& check->xh >= obon.xl
&& check->yl <= obon.yh
&& check->yh >= obon.yl)
{
switch (check->_class)
{
case playerobj:
if (obon._class == mshotobj)
{
DamagePlayer ();
obon._class = nothing;
return;
}
break;
case refugeeobj:
KillRefugee (check);
if (obon._class == pbigshotobj)
break;
obon._class = nothing;
return;
case mutantobj:
KillMutant (check);
if (obon._class == pbigshotobj)
break;
obon._class = nothing;
return;
case tankobj:
if (obon._class != mshotobj)
{
KillTank (check);
if (obon._class == pbigshotobj)
break;
obon._class = nothing;
return;
}
break;
case droneobj:
KillDrone (check);
if (obon._class == pbigshotobj)
break;
obon._class = nothing;
return;
}
}
}
TransformObon();
}
/*
==================
=
= InertThink
=
= Corpses, etc...
=
==================
*/
void InertThink (void)
{
TransformObon();
}
/*
===================
=
= ExplodeThink
=
===================
*/
void ExplodeThink (void)
{
obon.ticcount+=tics;
if (obon.ticcount>EXPLODEANM)
{
obon.ticcount -= EXPLODEANM;
if (++obon.stage == 5)
{
if (obon.temp1 == SHOTDIE1PIC) // shopt explosions go away
obon._class = nothing;
else
obon.think = InertThink;
return;
}
obon.shapenum = obon.temp1 + obon.stage;
}
TransformObon();
}
/*
=============================================================================
WARP GATE
=============================================================================
*/
/*
==================
=
= SpawnWarp
=
==================
*/
void SpawnWarp (fixed gx, fixed gy)
{
FindFreeObj();
_new->x = gx;
_new->y = gy;
_new->angle = 0;
_new->think = WarpThink;
_new->_class = warpobj;
_new->size = MINDIST;
_new->radarcolor = 14;
_new->shapenum = WARP1PIC;
CalcBoundsNew();
}
/*
===================
=
= WarpThink
=
===================
*/
void WarpThink (void)
{
obon.ticcount+=tics;
if (obon.ticcount>WARPANM)
{
obon.ticcount -= WARPANM;
if (++obon.stage == 4)
obon.stage = 0;
obon.shapenum = WARP1PIC + obon.stage;
}
TransformObon();
}
/*
=============================================================================
REFUGEE
=============================================================================
*/
/*
==================
=
= SpawnRefugee
=
= obon.temp2 is true if a drone is seeking it
=
==================
*/
void SpawnRefugee (fixed gx, fixed gy,int sex)
{
numrefugees++;
FindFreeObj();
_new->x = gx;
_new->y = gy;
_new->angle = 0;
_new->think = RefugeeThink;
_new->_class = refugeeobj;
_new->size = TILEGLOBAL/3;
_new->radarcolor = 15;
if (sex)
{
_new->shapenum = MAN1PIC;
_new->temp1 = MAN1PIC;
}
else
{
_new->shapenum = WOMAN1PIC;
_new->temp1 = WOMAN1PIC;
}
_new->temp2 = 0;
_new->ticcount = Rnd(REFUGEEANM*3);
CalcBoundsNew();
}
/*
===================
=
= KillRefugee
=
===================
*/
void KillRefugee (objtype *hit)
{
PlaySound (HOSTAGEDEADSND);
if (hit->radarx)
XPlot (hit->radarx,hit->radary,hit->radarcolor);
killedcount++;
DrawPic (2*(totalrefugees-killedcount)+1,6,DEADGUYPIC);
if (!--numrefugees)
{
PlaySound (WARPGATESND);
SpawnWarp (warpx,warpy);
}
hit->radarcolor = 0;
hit->_class = inertobj;
if (hit->temp1 == MAN1PIC)
hit->shapenum = hit->temp1 = MANDIE1PIC;
else
hit->shapenum = hit->temp1 = WOMANDIE1PIC;
hit->think = ExplodeThink;
hit->stage = hit->ticcount = 0;
}
/*
===================
=
= RefugeeThink
=
===================
*/
void RefugeeThink (void)
{
obon.ticcount+=tics;
if (obon.ticcount>REFUGEEANM)
{
obon.ticcount -= REFUGEEANM;
if (++obon.stage == 2)
obon.stage = 0;
obon.shapenum = obon.temp1 + obon.stage;
}
TransformObon();
}
/*
=============================================================================
DRONE
=============================================================================
*/
/*
==================
=
= SpawnDrone
=
= obon.temp1 is a pointer to the refugee the drone is currently seeking
=
==================
*/
void SpawnDrone (fixed gx, fixed gy)
{
FindFreeObj();
_new->x = gx;
_new->y = gy;
_new->angle = 0;
_new->think = DroneThink;
_new->_class = droneobj;
_new->size = MINDIST;
_new->radarcolor = 10;
_new->hitpoints = 2;
_new->shapenum = DRONE1PIC;
_new->ticcount = Rnd(DRONEANM*3);
_new->temp1ptr = _new; // will hunt first think
CalcBoundsNew();
}
/*
===================
=
= KillDrone
=
===================
*/
void KillDrone (objtype *hit)
{
PlaySound (SHOOTTHINGSND);
if (hit->radarx)
XPlot (hit->radarx,hit->radary,hit->radarcolor);
hit->radarcolor = 0;
hit->_class = inertobj;
hit->shapenum = hit->temp1 = DRONEDIE1PIC;
hit->think = ExplodeThink;
hit->stage = hit->ticcount = 0;
}
/*
==================
=
= DroneLockOn
=
==================
*/
void DroneLockOn (void)
{
objtype *check;
for (check=&objlist[2];check<lastobj;check++)
if (check->_class == refugeeobj && !check->temp2)
{
check->temp2++;
obon.temp1ptr = check;
return;
}
obon.temp1ptr = &objlist[0]; // go after player last
}
/*
===================
=
= DroneThink
=
===================
*/
void DroneThink (void)
{
if ( ((objtype *)obon.temp1ptr)->_class != refugeeobj &&
((objtype *)obon.temp1ptr)->_class != playerobj)
DroneLockOn (); // target died
obon.ticcount+=tics;
if (obon.ticcount>DRONEANM)
{
obon.ticcount -= DRONEANM;
if (++obon.stage == 4)
obon.stage = 0;
obon.shapenum = DRONE1PIC + obon.stage;
}
ChaseThing ((objtype *)obon.temp1ptr);
CalcBounds ();
TransformObon();
for (check = &objlist[0];check<=lastobj;check++)
if
(check->_class
&& check->xl <= obon.xh
&& check->xh >= obon.xl
&& check->yl <= obon.yh
&& check->yh >= obon.yl)
{
switch (check->_class)
{
case playerobj: // kill player and blow up
DamagePlayer ();
PlaySound (SHOOTTHINGSND);
if (obon.radarx)
XPlot (obon.radarx,obon.radary,obon.radarcolor);
obon.radarcolor = 0;
obon._class = inertobj;
obon.shapenum = obon.temp1 = DRONEDIE1PIC;
obon.think = ExplodeThink;
obon.stage = obon.ticcount = 0;
return;
case refugeeobj:
KillRefugee (check);
break;
}
}
}
/*
=============================================================================
TANK
=============================================================================
*/
/*
==================
=
= SpawnTank
=
==================
*/
void SpawnTank (fixed gx, fixed gy)
{
FindFreeObj();
_new->x = gx;
_new->y = gy;
_new->angle = 0;