ref: 521a1c828176944fcb4182661bca3f94220b60e8
dir: /src/hexen/p_map.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
#include "h2def.h"
#include "m_random.h"
#include "i_system.h"
#include "m_bbox.h"
#include "p_local.h"
#include "s_sound.h"
static void CheckForPushSpecial(line_t * line, int side, mobj_t * mobj);
/*
===============================================================================
NOTES:
===============================================================================
*/
/*
===============================================================================
mobj_t NOTES
mobj_ts are used to tell the refresh where to draw an image, tell the world simulation when objects are contacted, and tell the sound driver how to position a sound.
The refresh uses the next and prev links to follow lists of things in sectors as they are being drawn. The sprite, frame, and angle elements determine which patch_t is used to draw the sprite if it is visible. The sprite and frame values are allmost allways set from state_t structures. The statescr.exe utility generates the states.h and states.c files that contain the sprite/frame numbers from the statescr.txt source file. The xyz origin point represents a point at the bottom middle of the sprite (between the feet of a biped). This is the default origin position for patch_ts grabbed with lumpy.exe. A walking creature will have its z equal to the floor it is standing on.
The sound code uses the x,y, and subsector fields to do stereo positioning of any sound effited by the mobj_t.
The play simulation uses the blocklinks, x,y,z, radius, height to determine when mobj_ts are touching each other, touching lines in the map, or hit by trace lines (gunshots, lines of sight, etc). The mobj_t->flags element has various bit flags used by the simulation.
Every mobj_t is linked into a single sector based on it's origin coordinates.
The subsector_t is found with R_PointInSubsector(x,y), and the sector_t can be found with subsector->sector. The sector links are only used by the rendering code, the play simulation does not care about them at all.
Any mobj_t that needs to be acted upon be something else in the play world (block movement, be shot, etc) will also need to be linked into the blockmap. If the thing has the MF_NOBLOCK flag set, it will not use the block links. It can still interact with other things, but only as the instigator (missiles will run into other things, but nothing can run into a missile). Each block in the grid is 128*128 units, and knows about every line_t that it contains a piece of, and every interactable mobj_t that has it's origin contained.
A valid mobj_t is a mobj_t that has the proper subsector_t filled in for it's xy coordinates and is linked into the subsector's sector or has the MF_NOSECTOR flag set (the subsector_t needs to be valid even if MF_NOSECTOR is set), and is linked into a blockmap block or has the MF_NOBLOCKMAP flag set. Links should only be modified by the P_[Un]SetThingPosition () functions. Do not change the MF_NO? flags while a thing is valid.
===============================================================================
*/
fixed_t tmbbox[4];
mobj_t *tmthing;
mobj_t *tsthing;
int tmflags;
fixed_t tmx, tmy;
boolean floatok; // if true, move would be ok if
// within tmfloorz - tmceilingz
fixed_t tmfloorz, tmceilingz, tmdropoffz;
int tmfloorpic;
// keep track of the line that lowers the ceiling, so missiles don't explode
// against sky hack walls
line_t *ceilingline;
// keep track of special lines as they are hit, but don't process them
// until the move is proven valid
line_t *spechit[MAXSPECIALCROSS];
int numspechit;
mobj_t *onmobj; // generic global onmobj...used for landing on pods/players
mobj_t *BlockingMobj;
/*
===============================================================================
TELEPORT MOVE
===============================================================================
*/
/*
==================
=
= PIT_StompThing
=
==================
*/
boolean PIT_StompThing(mobj_t * thing)
{
fixed_t blockdist;
if (!(thing->flags & MF_SHOOTABLE))
return true;
blockdist = thing->radius + tmthing->radius;
if (abs(thing->x - tmx) >= blockdist || abs(thing->y - tmy) >= blockdist)
return true; // didn't hit it
if (thing == tmthing)
return true; // don't clip against self
if (!(tmthing->flags2 & MF2_TELESTOMP))
{ // Not allowed to stomp things
return (false);
}
P_DamageMobj(thing, tmthing, tmthing, 10000);
return true;
}
/*
===================
=
= P_TeleportMove
=
===================
*/
boolean P_TeleportMove(mobj_t * thing, fixed_t x, fixed_t y)
{
int xl, xh, yl, yh, bx, by;
subsector_t *newsubsec;
//
// kill anything occupying the position
//
tmthing = thing;
tmflags = thing->flags;
tmx = x;
tmy = y;
tmbbox[BOXTOP] = y + tmthing->radius;
tmbbox[BOXBOTTOM] = y - tmthing->radius;
tmbbox[BOXRIGHT] = x + tmthing->radius;
tmbbox[BOXLEFT] = x - tmthing->radius;
newsubsec = R_PointInSubsector(x, y);
ceilingline = NULL;
//
// the base floor / ceiling is from the subsector that contains the
// point. Any contacted lines the step closer together will adjust them
//
tmfloorz = tmdropoffz = newsubsec->sector->floorheight;
tmceilingz = newsubsec->sector->ceilingheight;
tmfloorpic = newsubsec->sector->floorpic;
validcount++;
numspechit = 0;
//
// stomp on any things contacted
//
xl = (tmbbox[BOXLEFT] - bmaporgx - MAXRADIUS) >> MAPBLOCKSHIFT;
xh = (tmbbox[BOXRIGHT] - bmaporgx + MAXRADIUS) >> MAPBLOCKSHIFT;
yl = (tmbbox[BOXBOTTOM] - bmaporgy - MAXRADIUS) >> MAPBLOCKSHIFT;
yh = (tmbbox[BOXTOP] - bmaporgy + MAXRADIUS) >> MAPBLOCKSHIFT;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
if (!P_BlockThingsIterator(bx, by, PIT_StompThing))
return false;
//
// the move is ok, so link the thing into its new position
//
P_UnsetThingPosition(thing);
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->x = x;
thing->y = y;
P_SetThingPosition(thing);
return true;
}
boolean PIT_ThrustStompThing(mobj_t * thing)
{
fixed_t blockdist;
if (!(thing->flags & MF_SHOOTABLE))
return true;
blockdist = thing->radius + tsthing->radius;
if (abs(thing->x - tsthing->x) >= blockdist ||
abs(thing->y - tsthing->y) >= blockdist ||
(thing->z > tsthing->z + tsthing->height))
return true; // didn't hit it
if (thing == tsthing)
return true; // don't clip against self
P_DamageMobj(thing, tsthing, tsthing, 10001);
tsthing->args[1] = 1; // Mark thrust thing as bloody
return true;
}
void PIT_ThrustSpike(mobj_t * actor)
{
int xl, xh, yl, yh, bx, by;
int x0, x2, y0, y2;
tsthing = actor;
x0 = actor->x - actor->info->radius;
x2 = actor->x + actor->info->radius;
y0 = actor->y - actor->info->radius;
y2 = actor->y + actor->info->radius;
xl = (x0 - bmaporgx - MAXRADIUS) >> MAPBLOCKSHIFT;
xh = (x2 - bmaporgx + MAXRADIUS) >> MAPBLOCKSHIFT;
yl = (y0 - bmaporgy - MAXRADIUS) >> MAPBLOCKSHIFT;
yh = (y2 - bmaporgy + MAXRADIUS) >> MAPBLOCKSHIFT;
// stomp on any things contacted
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
P_BlockThingsIterator(bx, by, PIT_ThrustStompThing);
}
/*
===============================================================================
MOVEMENT ITERATOR FUNCTIONS
===============================================================================
*/
/*
==================
=
= PIT_CheckLine
=
= Adjusts tmfloorz and tmceilingz as lines are contacted
==================
*/
boolean PIT_CheckLine(line_t * ld)
{
if (tmbbox[BOXRIGHT] <= ld->bbox[BOXLEFT]
|| tmbbox[BOXLEFT] >= ld->bbox[BOXRIGHT]
|| tmbbox[BOXTOP] <= ld->bbox[BOXBOTTOM]
|| tmbbox[BOXBOTTOM] >= ld->bbox[BOXTOP])
{
return (true);
}
if (P_BoxOnLineSide(tmbbox, ld) != -1)
{
return (true);
}
// a line has been hit
/*
=
= The moving thing's destination position will cross the given line.
= If this should not be allowed, return false.
= If the line is special, keep track of it to process later if the move
= is proven ok. NOTE: specials are NOT sorted by order, so two special lines
= that are only 8 pixels apart could be crossed in either order.
*/
if (!ld->backsector)
{ // One sided line
if (tmthing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tmthing, NULL, NULL, tmthing->info->mass >> 5);
}
CheckForPushSpecial(ld, 0, tmthing);
return (false);
}
if (!(tmthing->flags & MF_MISSILE))
{
if (ld->flags & ML_BLOCKING)
{ // Explicitly blocking everything
if (tmthing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tmthing, NULL, NULL, tmthing->info->mass >> 5);
}
CheckForPushSpecial(ld, 0, tmthing);
return (false);
}
if (!tmthing->player && ld->flags & ML_BLOCKMONSTERS)
{ // Block monsters only
if (tmthing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tmthing, NULL, NULL, tmthing->info->mass >> 5);
}
return (false);
}
}
P_LineOpening(ld); // set openrange, opentop, openbottom
// adjust floor / ceiling heights
if (opentop < tmceilingz)
{
tmceilingz = opentop;
ceilingline = ld;
}
if (openbottom > tmfloorz)
{
tmfloorz = openbottom;
}
if (lowfloor < tmdropoffz)
{
tmdropoffz = lowfloor;
}
if (ld->special)
{ // Contacted a special line, add it to the list
spechit[numspechit] = ld;
numspechit++;
}
return (true);
}
//---------------------------------------------------------------------------
//
// FUNC PIT_CheckThing
//
//---------------------------------------------------------------------------
boolean PIT_CheckThing(mobj_t * thing)
{
fixed_t blockdist;
boolean solid;
int damage;
if (!(thing->flags & (MF_SOLID | MF_SPECIAL | MF_SHOOTABLE)))
{ // Can't hit thing
return (true);
}
blockdist = thing->radius + tmthing->radius;
if (abs(thing->x - tmx) >= blockdist || abs(thing->y - tmy) >= blockdist)
{ // Didn't hit thing
return (true);
}
if (thing == tmthing)
{ // Don't clip against self
return (true);
}
BlockingMobj = thing;
if (tmthing->flags2 & MF2_PASSMOBJ)
{ // check if a mobj passed over/under another object
if (tmthing->type == MT_BISHOP && thing->type == MT_BISHOP)
{ // don't let bishops fly over other bishops
return false;
}
if (tmthing->z >= thing->z + thing->height
&& !(thing->flags & MF_SPECIAL))
{
return (true);
}
else if (tmthing->z + tmthing->height < thing->z
&& !(thing->flags & MF_SPECIAL))
{ // under thing
return (true);
}
}
// Check for skulls slamming into things
if (tmthing->flags & MF_SKULLFLY)
{
if (tmthing->type == MT_MINOTAUR)
{
// Slamming minotaurs shouldn't move non-creatures
if (!(thing->flags & MF_COUNTKILL))
{
return (false);
}
}
else if (tmthing->type == MT_HOLY_FX)
{
if (thing->flags & MF_SHOOTABLE && thing != tmthing->target)
{
if (netgame && !deathmatch && thing->player)
{ // don't attack other co-op players
return true;
}
if (thing->flags2 & MF2_REFLECTIVE
&& (thing->player || thing->flags2 & MF2_BOSS))
{
tmthing->special1.m = tmthing->target;
tmthing->target = thing;
return true;
}
if (thing->flags & MF_COUNTKILL || thing->player)
{
tmthing->special1.m = thing;
}
if (P_Random() < 96)
{
damage = 12;
if (thing->player || thing->flags2 & MF2_BOSS)
{
damage = 3;
// ghost burns out faster when attacking players/bosses
tmthing->health -= 6;
}
P_DamageMobj(thing, tmthing, tmthing->target, damage);
if (P_Random() < 128)
{
P_SpawnMobj(tmthing->x, tmthing->y, tmthing->z,
MT_HOLY_PUFF);
S_StartSound(tmthing, SFX_SPIRIT_ATTACK);
if (thing->flags & MF_COUNTKILL && P_Random() < 128
&& !S_GetSoundPlayingInfo(thing, SFX_PUPPYBEAT))
{
if ((thing->type == MT_CENTAUR) ||
(thing->type == MT_CENTAURLEADER) ||
(thing->type == MT_ETTIN))
{
S_StartSound(thing, SFX_PUPPYBEAT);
}
}
}
}
if (thing->health <= 0)
{
tmthing->special1.i = 0;
}
}
return true;
}
damage = ((P_Random() % 8) + 1) * tmthing->damage;
P_DamageMobj(thing, tmthing, tmthing, damage);
tmthing->flags &= ~MF_SKULLFLY;
tmthing->momx = tmthing->momy = tmthing->momz = 0;
P_SetMobjState(tmthing, tmthing->info->seestate);
return (false);
}
// Check for blasted thing running into another
if (tmthing->flags2 & MF2_BLASTED && thing->flags & MF_SHOOTABLE)
{
if (!(thing->flags2 & MF2_BOSS) && (thing->flags & MF_COUNTKILL))
{
thing->momx += tmthing->momx;
thing->momy += tmthing->momy;
if ((thing->momx + thing->momy) > 3 * FRACUNIT)
{
damage = (tmthing->info->mass / 100) + 1;
P_DamageMobj(thing, tmthing, tmthing, damage);
damage = (thing->info->mass / 100) + 1;
P_DamageMobj(tmthing, thing, thing, damage >> 2);
}
return (false);
}
}
// Check for missile
if (tmthing->flags & MF_MISSILE)
{
// Check for a non-shootable mobj
if (thing->flags2 & MF2_NONSHOOTABLE)
{
return true;
}
// Check if it went over / under
if (tmthing->z > thing->z + thing->height)
{ // Over thing
return (true);
}
if (tmthing->z + tmthing->height < thing->z)
{ // Under thing
return (true);
}
if (tmthing->flags2 & MF2_FLOORBOUNCE)
{
if (tmthing->target == thing || !(thing->flags & MF_SOLID))
{
return true;
}
else
{
return false;
}
}
if (tmthing->type == MT_LIGHTNING_FLOOR
|| tmthing->type == MT_LIGHTNING_CEILING)
{
if (thing->flags & MF_SHOOTABLE && thing != tmthing->target)
{
if (thing->info->mass != INT_MAX)
{
thing->momx += tmthing->momx >> 4;
thing->momy += tmthing->momy >> 4;
}
if ((!thing->player && !(thing->flags2 & MF2_BOSS))
|| !(leveltime & 1))
{
if (thing->type == MT_CENTAUR
|| thing->type == MT_CENTAURLEADER)
{ // Lightning does more damage to centaurs
P_DamageMobj(thing, tmthing, tmthing->target, 9);
}
else
{
P_DamageMobj(thing, tmthing, tmthing->target, 3);
}
if (!(S_GetSoundPlayingInfo(tmthing,
SFX_MAGE_LIGHTNING_ZAP)))
{
S_StartSound(tmthing, SFX_MAGE_LIGHTNING_ZAP);
}
if (thing->flags & MF_COUNTKILL && P_Random() < 64
&& !S_GetSoundPlayingInfo(thing, SFX_PUPPYBEAT))
{
if ((thing->type == MT_CENTAUR) ||
(thing->type == MT_CENTAURLEADER) ||
(thing->type == MT_ETTIN))
{
S_StartSound(thing, SFX_PUPPYBEAT);
}
}
}
tmthing->health--;
if (tmthing->health <= 0 || thing->health <= 0)
{
return false;
}
if (tmthing->type == MT_LIGHTNING_FLOOR)
{
if (tmthing->special2.m
&& !tmthing->special2.m->special1.m)
{
tmthing->special2.m->special1.m = thing;
}
}
else if (!tmthing->special1.m)
{
tmthing->special1.m = thing;
}
}
return true; // lightning zaps through all sprites
}
else if (tmthing->type == MT_LIGHTNING_ZAP)
{
mobj_t *lmo;
if (thing->flags & MF_SHOOTABLE && thing != tmthing->target)
{
lmo = tmthing->special2.m;
if (lmo)
{
if (lmo->type == MT_LIGHTNING_FLOOR)
{
if (lmo->special2.m
&& !lmo->special2.m->special1.m)
{
lmo->special2.m->special1.m = thing;
}
}
else if (!lmo->special1.m)
{
lmo->special1.m = thing;
}
if (!(leveltime & 3))
{
lmo->health--;
}
}
}
}
else if (tmthing->type == MT_MSTAFF_FX2 && thing != tmthing->target)
{
if (!thing->player && !(thing->flags2 & MF2_BOSS))
{
switch (thing->type)
{
case MT_FIGHTER_BOSS: // these not flagged boss
case MT_CLERIC_BOSS: // so they can be blasted
case MT_MAGE_BOSS:
break;
default:
P_DamageMobj(thing, tmthing, tmthing->target, 10);
return true;
break;
}
}
}
if (tmthing->target && tmthing->target->type == thing->type)
{ // Don't hit same species as originator
if (thing == tmthing->target)
{ // Don't missile self
return (true);
}
if (!thing->player)
{ // Hit same species as originator, explode, no damage
return (false);
}
}
if (!(thing->flags & MF_SHOOTABLE))
{ // Didn't do any damage
return !(thing->flags & MF_SOLID);
}
if (tmthing->flags2 & MF2_RIP)
{
if (!(thing->flags & MF_NOBLOOD) &&
!(thing->flags2 & MF2_REFLECTIVE) &&
!(thing->flags2 & MF2_INVULNERABLE))
{ // Ok to spawn some blood
P_RipperBlood(tmthing);
}
//S_StartSound(tmthing, sfx_ripslop);
damage = ((P_Random() & 3) + 2) * tmthing->damage;
P_DamageMobj(thing, tmthing, tmthing->target, damage);
if (thing->flags2 & MF2_PUSHABLE
&& !(tmthing->flags2 & MF2_CANNOTPUSH))
{ // Push thing
thing->momx += tmthing->momx >> 2;
thing->momy += tmthing->momy >> 2;
}
numspechit = 0;
return (true);
}
// Do damage
damage = ((P_Random() % 8) + 1) * tmthing->damage;
if (damage)
{
if (!(thing->flags & MF_NOBLOOD) &&
!(thing->flags2 & MF2_REFLECTIVE) &&
!(thing->flags2 & MF2_INVULNERABLE) &&
!(tmthing->type == MT_TELOTHER_FX1) &&
!(tmthing->type == MT_TELOTHER_FX2) &&
!(tmthing->type == MT_TELOTHER_FX3) &&
!(tmthing->type == MT_TELOTHER_FX4) &&
!(tmthing->type == MT_TELOTHER_FX5) && (P_Random() < 192))
{
P_BloodSplatter(tmthing->x, tmthing->y, tmthing->z, thing);
}
P_DamageMobj(thing, tmthing, tmthing->target, damage);
}
return (false);
}
if (thing->flags2 & MF2_PUSHABLE && !(tmthing->flags2 & MF2_CANNOTPUSH))
{ // Push thing
thing->momx += tmthing->momx >> 2;
thing->momy += tmthing->momy >> 2;
}
// Check for special thing
if (thing->flags & MF_SPECIAL)
{
solid = (thing->flags & MF_SOLID) != 0;
if (tmflags & MF_PICKUP)
{ // Can be picked up by tmthing
P_TouchSpecialThing(thing, tmthing); // Can remove thing
}
return (!solid);
}
return (!(thing->flags & MF_SOLID));
}
//---------------------------------------------------------------------------
//
// PIT_CheckOnmobjZ
//
//---------------------------------------------------------------------------
boolean PIT_CheckOnmobjZ(mobj_t * thing)
{
fixed_t blockdist;
if (!(thing->flags & (MF_SOLID | MF_SPECIAL | MF_SHOOTABLE)))
{ // Can't hit thing
return (true);
}
blockdist = thing->radius + tmthing->radius;
if (abs(thing->x - tmx) >= blockdist || abs(thing->y - tmy) >= blockdist)
{ // Didn't hit thing
return (true);
}
if (thing == tmthing)
{ // Don't clip against self
return (true);
}
if (tmthing->z > thing->z + thing->height)
{
return (true);
}
else if (tmthing->z + tmthing->height < thing->z)
{ // under thing
return (true);
}
if (thing->flags & MF_SOLID)
{
onmobj = thing;
}
return (!(thing->flags & MF_SOLID));
}
/*
===============================================================================
MOVEMENT CLIPPING
===============================================================================
*/
//----------------------------------------------------------------------------
//
// FUNC P_TestMobjLocation
//
// Returns true if the mobj is not blocked by anything at its current
// location, otherwise returns false.
//
//----------------------------------------------------------------------------
boolean P_TestMobjLocation(mobj_t * mobj)
{
int flags;
flags = mobj->flags;
mobj->flags &= ~MF_PICKUP;
if (P_CheckPosition(mobj, mobj->x, mobj->y))
{ // XY is ok, now check Z
mobj->flags = flags;
if ((mobj->z < mobj->floorz)
|| (mobj->z + mobj->height > mobj->ceilingz))
{ // Bad Z
return (false);
}
return (true);
}
mobj->flags = flags;
return (false);
}
/*
==================
=
= P_CheckPosition
=
= This is purely informative, nothing is modified (except things picked up)
in:
a mobj_t (can be valid or invalid)
a position to be checked (doesn't need to be related to the mobj_t->x,y)
during:
special things are touched if MF_PICKUP
early out on solid lines?
out:
newsubsec
floorz
ceilingz
tmdropoffz = the lowest point contacted (monsters won't move to a dropoff)
speciallines[]
numspeciallines
mobj_t *BlockingMobj = pointer to thing that blocked position (NULL if not
blocked, or blocked by a line).
==================
*/
boolean P_CheckPosition(mobj_t * thing, fixed_t x, fixed_t y)
{
int xl, xh, yl, yh, bx, by;
subsector_t *newsubsec;
tmthing = thing;
tmflags = thing->flags;
tmx = x;
tmy = y;
tmbbox[BOXTOP] = y + tmthing->radius;
tmbbox[BOXBOTTOM] = y - tmthing->radius;
tmbbox[BOXRIGHT] = x + tmthing->radius;
tmbbox[BOXLEFT] = x - tmthing->radius;
newsubsec = R_PointInSubsector(x, y);
ceilingline = NULL;
//
// the base floor / ceiling is from the subsector that contains the
// point. Any contacted lines the step closer together will adjust them
//
tmfloorz = tmdropoffz = newsubsec->sector->floorheight;
tmceilingz = newsubsec->sector->ceilingheight;
tmfloorpic = newsubsec->sector->floorpic;
validcount++;
numspechit = 0;
if (tmflags & MF_NOCLIP && !(tmflags & MF_SKULLFLY))
{
return true;
}
//
// check things first, possibly picking things up
// the bounding box is extended by MAXRADIUS because mobj_ts are grouped
// into mapblocks based on their origin point, and can overlap into adjacent
// blocks by up to MAXRADIUS units
//
xl = (tmbbox[BOXLEFT] - bmaporgx - MAXRADIUS) >> MAPBLOCKSHIFT;
xh = (tmbbox[BOXRIGHT] - bmaporgx + MAXRADIUS) >> MAPBLOCKSHIFT;
yl = (tmbbox[BOXBOTTOM] - bmaporgy - MAXRADIUS) >> MAPBLOCKSHIFT;
yh = (tmbbox[BOXTOP] - bmaporgy + MAXRADIUS) >> MAPBLOCKSHIFT;
BlockingMobj = NULL;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
if (!P_BlockThingsIterator(bx, by, PIT_CheckThing))
return false;
//
// check lines
//
if (tmflags & MF_NOCLIP)
{
return true;
}
BlockingMobj = NULL;
xl = (tmbbox[BOXLEFT] - bmaporgx) >> MAPBLOCKSHIFT;
xh = (tmbbox[BOXRIGHT] - bmaporgx) >> MAPBLOCKSHIFT;
yl = (tmbbox[BOXBOTTOM] - bmaporgy) >> MAPBLOCKSHIFT;
yh = (tmbbox[BOXTOP] - bmaporgy) >> MAPBLOCKSHIFT;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
if (!P_BlockLinesIterator(bx, by, PIT_CheckLine))
return false;
return true;
}
//=============================================================================
//
// P_CheckOnmobj(mobj_t *thing)
//
// Checks if the new Z position is legal
//=============================================================================
mobj_t *P_CheckOnmobj(mobj_t * thing)
{
int xl, xh, yl, yh, bx, by;
subsector_t *newsubsec;
fixed_t x;
fixed_t y;
mobj_t oldmo;
x = thing->x;
y = thing->y;
tmthing = thing;
tmflags = thing->flags;
oldmo = *thing; // save the old mobj before the fake zmovement
P_FakeZMovement(tmthing);
tmx = x;
tmy = y;
tmbbox[BOXTOP] = y + tmthing->radius;
tmbbox[BOXBOTTOM] = y - tmthing->radius;
tmbbox[BOXRIGHT] = x + tmthing->radius;
tmbbox[BOXLEFT] = x - tmthing->radius;
newsubsec = R_PointInSubsector(x, y);
ceilingline = NULL;
//
// the base floor / ceiling is from the subsector that contains the
// point. Any contacted lines the step closer together will adjust them
//
tmfloorz = tmdropoffz = newsubsec->sector->floorheight;
tmceilingz = newsubsec->sector->ceilingheight;
tmfloorpic = newsubsec->sector->floorpic;
validcount++;
numspechit = 0;
if (tmflags & MF_NOCLIP)
return NULL;
//
// check things first, possibly picking things up
// the bounding box is extended by MAXRADIUS because mobj_ts are grouped
// into mapblocks based on their origin point, and can overlap into adjacent
// blocks by up to MAXRADIUS units
//
xl = (tmbbox[BOXLEFT] - bmaporgx - MAXRADIUS) >> MAPBLOCKSHIFT;
xh = (tmbbox[BOXRIGHT] - bmaporgx + MAXRADIUS) >> MAPBLOCKSHIFT;
yl = (tmbbox[BOXBOTTOM] - bmaporgy - MAXRADIUS) >> MAPBLOCKSHIFT;
yh = (tmbbox[BOXTOP] - bmaporgy + MAXRADIUS) >> MAPBLOCKSHIFT;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
if (!P_BlockThingsIterator(bx, by, PIT_CheckOnmobjZ))
{
*tmthing = oldmo;
return onmobj;
}
*tmthing = oldmo;
return NULL;
}
//=============================================================================
//
// P_FakeZMovement
//
// Fake the zmovement so that we can check if a move is legal
//=============================================================================
void P_FakeZMovement(mobj_t * mo)
{
int dist;
int delta;
//
// adjust height
//
mo->z += mo->momz;
if (mo->flags & MF_FLOAT && mo->target)
{ // float down towards target if too close
if (!(mo->flags & MF_SKULLFLY) && !(mo->flags & MF_INFLOAT))
{
dist =
P_AproxDistance(mo->x - mo->target->x, mo->y - mo->target->y);
delta = (mo->target->z + (mo->height >> 1)) - mo->z;
if (delta < 0 && dist < -(delta * 3))
mo->z -= FLOATSPEED;
else if (delta > 0 && dist < (delta * 3))
mo->z += FLOATSPEED;
}
}
if (mo->player && mo->flags2 & MF2_FLY && !(mo->z <= mo->floorz)
&& leveltime & 2)
{
mo->z += finesine[(FINEANGLES / 20 * leveltime >> 2) & FINEMASK];
}
//
// clip movement
//
if (mo->z <= mo->floorz)
{ // Hit the floor
mo->z = mo->floorz;
if (mo->momz < 0)
{
mo->momz = 0;
}
if (mo->flags & MF_SKULLFLY)
{ // The skull slammed into something
mo->momz = -mo->momz;
}
if (mo->info->crashstate && (mo->flags & MF_CORPSE))
{
return;
}
}
else if (mo->flags2 & MF2_LOGRAV)
{
if (mo->momz == 0)
mo->momz = -(GRAVITY >> 3) * 2;
else
mo->momz -= GRAVITY >> 3;
}
else if (!(mo->flags & MF_NOGRAVITY))
{
if (mo->momz == 0)
mo->momz = -GRAVITY * 2;
else
mo->momz -= GRAVITY;
}
if (mo->z + mo->height > mo->ceilingz)
{ // hit the ceiling
if (mo->momz > 0)
mo->momz = 0;
mo->z = mo->ceilingz - mo->height;
if (mo->flags & MF_SKULLFLY)
{ // the skull slammed into something
mo->momz = -mo->momz;
}
}
}
//===========================================================================
//
// CheckForPushSpecial
//
//===========================================================================
static void CheckForPushSpecial(line_t * line, int side, mobj_t * mobj)
{
if (line->special)
{
if (mobj->flags2 & MF2_PUSHWALL)
{
P_ActivateLine(line, mobj, side, SPAC_PUSH);
}
else if (mobj->flags2 & MF2_IMPACT)
{
P_ActivateLine(line, mobj, side, SPAC_IMPACT);
}
}
}
/*
===================
=
= P_TryMove
=
= Attempt to move to a new position, crossing special lines unless MF_TELEPORT
= is set
=
===================
*/
boolean P_TryMove(mobj_t * thing, fixed_t x, fixed_t y)
{
fixed_t oldx, oldy;
int side, oldside;
line_t *ld;
floatok = false;
if (!P_CheckPosition(thing, x, y))
{ // Solid wall or thing
if (!BlockingMobj || BlockingMobj->player || !thing->player)
{
goto pushline;
}
else if (BlockingMobj->z + BlockingMobj->height - thing->z
> 24 * FRACUNIT
|| (BlockingMobj->subsector->sector->ceilingheight
- (BlockingMobj->z + BlockingMobj->height) <
thing->height)
|| (tmceilingz - (BlockingMobj->z + BlockingMobj->height) <
thing->height))
{
goto pushline;
}
}
if (!(thing->flags & MF_NOCLIP))
{
if (tmceilingz - tmfloorz < thing->height)
{ // Doesn't fit
goto pushline;
}
floatok = true;
if (!(thing->flags & MF_TELEPORT)
&& tmceilingz - thing->z < thing->height
&& thing->type != MT_LIGHTNING_CEILING
&& !(thing->flags2 & MF2_FLY))
{ // mobj must lower itself to fit
goto pushline;
}
if (thing->flags2 & MF2_FLY)
{
if (thing->z + thing->height > tmceilingz)
{
thing->momz = -8 * FRACUNIT;
goto pushline;
}
else if (thing->z < tmfloorz
&& tmfloorz - tmdropoffz > 24 * FRACUNIT)
{
thing->momz = 8 * FRACUNIT;
goto pushline;
}
}
if (!(thing->flags & MF_TELEPORT)
// The Minotaur floor fire (MT_MNTRFX2) can step up any amount
&& thing->type != MT_MNTRFX2 && thing->type != MT_LIGHTNING_FLOOR
&& tmfloorz - thing->z > 24 * FRACUNIT)
{
goto pushline;
}
if (!(thing->flags & (MF_DROPOFF | MF_FLOAT)) &&
(tmfloorz - tmdropoffz > 24 * FRACUNIT) &&
!(thing->flags2 & MF2_BLASTED))
{ // Can't move over a dropoff unless it's been blasted
return (false);
}
if (thing->flags2 & MF2_CANTLEAVEFLOORPIC
&& (tmfloorpic != thing->subsector->sector->floorpic
|| tmfloorz - thing->z != 0))
{ // must stay within a sector of a certain floor type
return false;
}
}
//
// the move is ok, so link the thing into its new position
//
P_UnsetThingPosition(thing);
oldx = thing->x;
oldy = thing->y;
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->floorpic = tmfloorpic;
thing->x = x;
thing->y = y;
P_SetThingPosition(thing);
if (thing->flags2 & MF2_FLOORCLIP)
{
if (thing->z == thing->subsector->sector->floorheight
&& P_GetThingFloorType(thing) >= FLOOR_LIQUID)
{
thing->floorclip = 10 * FRACUNIT;
}
else
{
thing->floorclip = 0;
}
}
//
// if any special lines were hit, do the effect
//
if (!(thing->flags & (MF_TELEPORT | MF_NOCLIP)))
{
while (numspechit > 0)
{
numspechit--;
// see if the line was crossed
ld = spechit[numspechit];
side = P_PointOnLineSide(thing->x, thing->y, ld);
oldside = P_PointOnLineSide(oldx, oldy, ld);
if (side != oldside)
{
if (ld->special)
{
if (thing->player)
{
P_ActivateLine(ld, thing, oldside, SPAC_CROSS);
}
else if (thing->flags2 & MF2_MCROSS)
{
P_ActivateLine(ld, thing, oldside, SPAC_MCROSS);
}
else if (thing->flags2 & MF2_PCROSS)
{
P_ActivateLine(ld, thing, oldside, SPAC_PCROSS);
}
}
}
}
}
return true;
pushline:
if (!(thing->flags & (MF_TELEPORT | MF_NOCLIP)))
{
int numSpecHitTemp;
if (tmthing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tmthing, NULL, NULL, tmthing->info->mass >> 5);
}
numSpecHitTemp = numspechit;
while (numSpecHitTemp > 0)
{
numSpecHitTemp--;
// see if the line was crossed
ld = spechit[numSpecHitTemp];
side = P_PointOnLineSide(thing->x, thing->y, ld);
CheckForPushSpecial(ld, side, thing);
}
}
return false;
}
/*
==================
=
= P_ThingHeightClip
=
= Takes a valid thing and adjusts the thing->floorz, thing->ceilingz,
= anf possibly thing->z
=
= This is called for all nearby monsters whenever a sector changes height
=
= If the thing doesn't fit, the z will be set to the lowest value and
= false will be returned
==================
*/
boolean P_ThingHeightClip(mobj_t * thing)
{
boolean onfloor;
onfloor = (thing->z == thing->floorz);
P_CheckPosition(thing, thing->x, thing->y);
// what about stranding a monster partially off an edge?
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->floorpic = tmfloorpic;
if (onfloor)
{ // walking monsters rise and fall with the floor
if ((thing->z - thing->floorz < 9 * FRACUNIT)
|| (thing->flags & MF_NOGRAVITY))
{
thing->z = thing->floorz;
}
}
else
{ // don't adjust a floating monster unless forced to
if (thing->z + thing->height > thing->ceilingz)
thing->z = thing->ceilingz - thing->height;
}
if (thing->ceilingz - thing->floorz < thing->height)
return false;
return true;
}
/*
==============================================================================
SLIDE MOVE
Allows the player to slide along any angled walls
==============================================================================
*/
fixed_t bestslidefrac, secondslidefrac;
line_t *bestslideline, *secondslideline;
mobj_t *slidemo;
fixed_t tmxmove, tmymove;
/*
==================
=
= P_HitSlideLine
=
= Adjusts the xmove / ymove so that the next move will slide along the wall
==================
*/
void P_HitSlideLine(line_t * ld)
{
int side;
angle_t lineangle, moveangle, deltaangle;
fixed_t movelen, newlen;
if (ld->slopetype == ST_HORIZONTAL)
{
tmymove = 0;
return;
}
if (ld->slopetype == ST_VERTICAL)
{
tmxmove = 0;
return;
}
side = P_PointOnLineSide(slidemo->x, slidemo->y, ld);
lineangle = R_PointToAngle2(0, 0, ld->dx, ld->dy);
if (side == 1)
lineangle += ANG180;
moveangle = R_PointToAngle2(0, 0, tmxmove, tmymove);
deltaangle = moveangle - lineangle;
if (deltaangle > ANG180)
deltaangle += ANG180;
// I_Error ("SlideLine: ang>ANG180");
lineangle >>= ANGLETOFINESHIFT;
deltaangle >>= ANGLETOFINESHIFT;
movelen = P_AproxDistance(tmxmove, tmymove);
newlen = FixedMul(movelen, finecosine[deltaangle]);
tmxmove = FixedMul(newlen, finecosine[lineangle]);
tmymove = FixedMul(newlen, finesine[lineangle]);
}
/*
==============
=
= PTR_SlideTraverse
=
==============
*/
boolean PTR_SlideTraverse(intercept_t * in)
{
line_t *li;
if (!in->isaline)
I_Error("PTR_SlideTraverse: not a line?");
li = in->d.line;
if (!(li->flags & ML_TWOSIDED))
{
if (P_PointOnLineSide(slidemo->x, slidemo->y, li))
return true; // don't hit the back side
goto isblocking;
}
P_LineOpening(li); // set openrange, opentop, openbottom
if (openrange < slidemo->height)
goto isblocking; // doesn't fit
if (opentop - slidemo->z < slidemo->height)
goto isblocking; // mobj is too high
if (openbottom - slidemo->z > 24 * FRACUNIT)
goto isblocking; // too big a step up
return true; // this line doesn't block movement
// the line does block movement, see if it is closer than best so far
isblocking:
if (in->frac < bestslidefrac)
{
secondslidefrac = bestslidefrac;
secondslideline = bestslideline;
bestslidefrac = in->frac;
bestslideline = li;
}
return false; // stop
}
/*
==================
=
= P_SlideMove
=
= The momx / momy move is bad, so try to slide along a wall
=
= Find the first line hit, move flush to it, and slide along it
=
= This is a kludgy mess.
==================
*/
void P_SlideMove(mobj_t * mo)
{
fixed_t leadx, leady;
fixed_t trailx, traily;
fixed_t newx, newy;
int hitcount;
slidemo = mo;
hitcount = 0;
retry:
if (++hitcount == 3)
goto stairstep; // don't loop forever
//
// trace along the three leading corners
//
if (mo->momx > 0)
{
leadx = mo->x + mo->radius;
trailx = mo->x - mo->radius;
}
else
{
leadx = mo->x - mo->radius;
trailx = mo->x + mo->radius;
}
if (mo->momy > 0)
{
leady = mo->y + mo->radius;
traily = mo->y - mo->radius;
}
else
{
leady = mo->y - mo->radius;
traily = mo->y + mo->radius;
}
bestslidefrac = FRACUNIT + 1;
P_PathTraverse(leadx, leady, leadx + mo->momx, leady + mo->momy,
PT_ADDLINES, PTR_SlideTraverse);
P_PathTraverse(trailx, leady, trailx + mo->momx, leady + mo->momy,
PT_ADDLINES, PTR_SlideTraverse);
P_PathTraverse(leadx, traily, leadx + mo->momx, traily + mo->momy,
PT_ADDLINES, PTR_SlideTraverse);
//
// move up to the wall
//
if (bestslidefrac == FRACUNIT + 1)
{ // the move must have hit the middle, so stairstep
stairstep:
if (!P_TryMove(mo, mo->x, mo->y + mo->momy))
{
P_TryMove(mo, mo->x + mo->momx, mo->y);
}
return;
}
bestslidefrac -= 0x800; // fudge a bit to make sure it doesn't hit
if (bestslidefrac > 0)
{
newx = FixedMul(mo->momx, bestslidefrac);
newy = FixedMul(mo->momy, bestslidefrac);
if (!P_TryMove(mo, mo->x + newx, mo->y + newy))
goto stairstep;
}
//
// now continue along the wall
//
bestslidefrac = FRACUNIT - (bestslidefrac + 0x800); // remainder
if (bestslidefrac > FRACUNIT)
bestslidefrac = FRACUNIT;
if (bestslidefrac <= 0)
return;
tmxmove = FixedMul(mo->momx, bestslidefrac);
tmymove = FixedMul(mo->momy, bestslidefrac);
P_HitSlideLine(bestslideline); // clip the moves
mo->momx = tmxmove;
mo->momy = tmymove;
if (!P_TryMove(mo, mo->x + tmxmove, mo->y + tmymove))
{
goto retry;
}
}
//============================================================================
//
// PTR_BounceTraverse
//
//============================================================================
boolean PTR_BounceTraverse(intercept_t * in)
{
line_t *li;
if (!in->isaline)
I_Error("PTR_BounceTraverse: not a line?");
li = in->d.line;
if (!(li->flags & ML_TWOSIDED))
{
if (P_PointOnLineSide(slidemo->x, slidemo->y, li))
return true; // don't hit the back side
goto bounceblocking;
}
P_LineOpening(li); // set openrange, opentop, openbottom
if (openrange < slidemo->height)
goto bounceblocking; // doesn't fit
if (opentop - slidemo->z < slidemo->height)
goto bounceblocking; // mobj is too high
return true; // this line doesn't block movement
// the line does block movement, see if it is closer than best so far
bounceblocking:
if (in->frac < bestslidefrac)
{
secondslidefrac = bestslidefrac;
secondslideline = bestslideline;
bestslidefrac = in->frac;
bestslideline = li;
}
return false; // stop
}
//============================================================================
//
// P_BounceWall
//
//============================================================================
void P_BounceWall(mobj_t * mo)
{
fixed_t leadx, leady;
int side;
angle_t lineangle, moveangle, deltaangle;
fixed_t movelen;
slidemo = mo;
//
// trace along the three leading corners
//
if (mo->momx > 0)
{
leadx = mo->x + mo->radius;
}
else
{
leadx = mo->x - mo->radius;
}
if (mo->momy > 0)
{
leady = mo->y + mo->radius;
}
else
{
leady = mo->y - mo->radius;
}
bestslidefrac = FRACUNIT + 1;
P_PathTraverse(leadx, leady, leadx + mo->momx, leady + mo->momy,
PT_ADDLINES, PTR_BounceTraverse);
side = P_PointOnLineSide(mo->x, mo->y, bestslideline);
lineangle = R_PointToAngle2(0, 0, bestslideline->dx, bestslideline->dy);
if (side == 1)
lineangle += ANG180;
moveangle = R_PointToAngle2(0, 0, mo->momx, mo->momy);
deltaangle = (2 * lineangle) - moveangle;
// if (deltaangle > ANG180)
// deltaangle += ANG180;
// I_Error ("SlideLine: ang>ANG180");
lineangle >>= ANGLETOFINESHIFT;
deltaangle >>= ANGLETOFINESHIFT;
movelen = P_AproxDistance(mo->momx, mo->momy);
movelen = FixedMul(movelen, 0.75 * FRACUNIT); // friction
if (movelen < FRACUNIT)
movelen = 2 * FRACUNIT;
mo->momx = FixedMul(movelen, finecosine[deltaangle]);
mo->momy = FixedMul(movelen, finesine[deltaangle]);
}
/*
==============================================================================
P_LineAttack
==============================================================================
*/
mobj_t *PuffSpawned;
mobj_t *linetarget; // who got hit (or NULL)
mobj_t *shootthing;
fixed_t shootz; // height if not aiming up or down
// ???: use slope for monsters?
int la_damage;
fixed_t attackrange;
fixed_t aimslope;
/*
===============================================================================
=
= PTR_AimTraverse
=
= Sets linetaget and aimslope when a target is aimed at
===============================================================================
*/
boolean PTR_AimTraverse(intercept_t * in)
{
line_t *li;
mobj_t *th;
fixed_t slope, thingtopslope, thingbottomslope;
fixed_t dist;
if (in->isaline)
{
li = in->d.line;
if (!(li->flags & ML_TWOSIDED))
return false; // stop
//
// crosses a two sided line
// a two sided line will restrict the possible target ranges
P_LineOpening(li);
if (openbottom >= opentop)
return false; // stop
dist = FixedMul(attackrange, in->frac);
if (li->frontsector->floorheight != li->backsector->floorheight)
{
slope = FixedDiv(openbottom - shootz, dist);
if (slope > bottomslope)
bottomslope = slope;
}
if (li->frontsector->ceilingheight != li->backsector->ceilingheight)
{
slope = FixedDiv(opentop - shootz, dist);
if (slope < topslope)
topslope = slope;
}
if (topslope <= bottomslope)
return false; // stop
return true; // shot continues
}
//
// shoot a thing
//
th = in->d.thing;
if (th == shootthing)
return true; // can't shoot self
if (!(th->flags & MF_SHOOTABLE))
{ // corpse or something
return true;
}
if (th->player && netgame && !deathmatch)
{ // don't aim at fellow co-op players
return true;
}
// check angles to see if the thing can be aimed at
dist = FixedMul(attackrange, in->frac);
thingtopslope = FixedDiv(th->z + th->height - shootz, dist);
if (thingtopslope < bottomslope)
return true; // shot over the thing
thingbottomslope = FixedDiv(th->z - shootz, dist);
if (thingbottomslope > topslope)
return true; // shot under the thing
//
// this thing can be hit!
//
if (thingtopslope > topslope)
thingtopslope = topslope;
if (thingbottomslope < bottomslope)
thingbottomslope = bottomslope;
aimslope = (thingtopslope + thingbottomslope) / 2;
linetarget = th;
return false; // don't go any farther
}
/*
==============================================================================
=
= PTR_ShootTraverse
=
==============================================================================
*/
boolean PTR_ShootTraverse(intercept_t * in)
{
fixed_t x, y, z;
fixed_t frac;
line_t *li;
mobj_t *th;
fixed_t slope;
fixed_t dist;
fixed_t thingtopslope, thingbottomslope;
if (in->isaline)
{
li = in->d.line;
if (li->special)
{
P_ActivateLine(li, shootthing, 0, SPAC_IMPACT);
// P_ShootSpecialLine (shootthing, li);
}
if (!(li->flags & ML_TWOSIDED))
goto hitline;
//
// crosses a two sided line
//
P_LineOpening(li);
dist = FixedMul(attackrange, in->frac);
if (li->frontsector->floorheight != li->backsector->floorheight)
{
slope = FixedDiv(openbottom - shootz, dist);
if (slope > aimslope)
goto hitline;
}
if (li->frontsector->ceilingheight != li->backsector->ceilingheight)
{
slope = FixedDiv(opentop - shootz, dist);
if (slope < aimslope)
goto hitline;
}
return true; // shot continues
//
// hit line
//
hitline:
// position a bit closer
frac = in->frac - FixedDiv(4 * FRACUNIT, attackrange);
x = trace.x + FixedMul(trace.dx, frac);
y = trace.y + FixedMul(trace.dy, frac);
z = shootz + FixedMul(aimslope, FixedMul(frac, attackrange));
if (li->frontsector->ceilingpic == skyflatnum)
{
if (z > li->frontsector->ceilingheight)
return false; // don't shoot the sky!
if (li->backsector && li->backsector->ceilingpic == skyflatnum)
return false; // it's a sky hack wall
}
P_SpawnPuff(x, y, z);
return false; // don't go any farther
}
//
// shoot a thing
//
th = in->d.thing;
if (th == shootthing)
return true; // can't shoot self
if (!(th->flags & MF_SHOOTABLE))
return true; // corpse or something
//
// check for physical attacks on a ghost
//
/* FIX: Impliment Heretic 2 weapons here
if(th->flags&MF_SHADOW && shootthing->player->readyweapon == wp_staff)
{
return(true);
}
*/
// check angles to see if the thing can be aimed at
dist = FixedMul(attackrange, in->frac);
thingtopslope = FixedDiv(th->z + th->height - shootz, dist);
if (thingtopslope < aimslope)
return true; // shot over the thing
thingbottomslope = FixedDiv(th->z - shootz, dist);
if (thingbottomslope > aimslope)
return true; // shot under the thing
//
// hit thing
//
// position a bit closer
frac = in->frac - FixedDiv(10 * FRACUNIT, attackrange);
x = trace.x + FixedMul(trace.dx, frac);
y = trace.y + FixedMul(trace.dy, frac);
z = shootz + FixedMul(aimslope, FixedMul(frac, attackrange));
P_SpawnPuff(x, y, z);
if (la_damage)
{
if (!(in->d.thing->flags & MF_NOBLOOD) &&
!(in->d.thing->flags2 & MF2_INVULNERABLE))
{
if (PuffType == MT_AXEPUFF || PuffType == MT_AXEPUFF_GLOW)
{
P_BloodSplatter2(x, y, z, in->d.thing);
}
if (P_Random() < 192)
{
P_BloodSplatter(x, y, z, in->d.thing);
}
}
if (PuffType == MT_FLAMEPUFF2)
{ // Cleric FlameStrike does fire damage
P_DamageMobj(th, &LavaInflictor, shootthing, la_damage);
}
else
{
P_DamageMobj(th, shootthing, shootthing, la_damage);
}
}
return (false); // don't go any farther
}
/*
=================
=
= P_AimLineAttack
=
=================
*/
fixed_t P_AimLineAttack(mobj_t * t1, angle_t angle, fixed_t distance)
{
fixed_t x2, y2;
angle >>= ANGLETOFINESHIFT;
shootthing = t1;
x2 = t1->x + (distance >> FRACBITS) * finecosine[angle];
y2 = t1->y + (distance >> FRACBITS) * finesine[angle];
shootz = t1->z + (t1->height >> 1) + 8 * FRACUNIT;
topslope = 100 * FRACUNIT / 160; // can't shoot outside view angles
bottomslope = -100 * FRACUNIT / 160;
attackrange = distance;
linetarget = NULL;
P_PathTraverse(t1->x, t1->y, x2, y2, PT_ADDLINES | PT_ADDTHINGS,
PTR_AimTraverse);
if (linetarget)
return aimslope;
return 0;
}
/*
=================
=
= P_LineAttack
=
= if damage == 0, it is just a test trace that will leave linetarget set
=
=================
*/
void P_LineAttack(mobj_t * t1, angle_t angle, fixed_t distance, fixed_t slope,
int damage)
{
fixed_t x2, y2;
angle >>= ANGLETOFINESHIFT;
shootthing = t1;
la_damage = damage;
x2 = t1->x + (distance >> FRACBITS) * finecosine[angle];
y2 = t1->y + (distance >> FRACBITS) * finesine[angle];
shootz = t1->z + (t1->height >> 1) + 8 * FRACUNIT;
shootz -= t1->floorclip;
attackrange = distance;
aimslope = slope;
if (P_PathTraverse(t1->x, t1->y, x2, y2, PT_ADDLINES | PT_ADDTHINGS,
PTR_ShootTraverse))
{
switch (PuffType)
{
case MT_PUNCHPUFF:
S_StartSound(t1, SFX_FIGHTER_PUNCH_MISS);
break;
case MT_HAMMERPUFF:
case MT_AXEPUFF:
case MT_AXEPUFF_GLOW:
S_StartSound(t1, SFX_FIGHTER_HAMMER_MISS);
break;
case MT_FLAMEPUFF:
P_SpawnPuff(x2, y2, shootz + FixedMul(slope, distance));
break;
default:
break;
}
}
}
/*
==============================================================================
USE LINES
==============================================================================
*/
mobj_t *usething;
boolean PTR_UseTraverse(intercept_t * in)
{
int sound;
fixed_t pheight;
if (!in->d.line->special)
{
P_LineOpening(in->d.line);
if (openrange <= 0)
{
if (usething->player)
{
switch (usething->player->class)
{
case PCLASS_FIGHTER:
sound = SFX_PLAYER_FIGHTER_FAILED_USE;
break;
case PCLASS_CLERIC:
sound = SFX_PLAYER_CLERIC_FAILED_USE;
break;
case PCLASS_MAGE:
sound = SFX_PLAYER_MAGE_FAILED_USE;
break;
case PCLASS_PIG:
sound = SFX_PIG_ACTIVE1;
break;
default:
sound = SFX_NONE;
break;
}
S_StartSound(usething, sound);
}
return false; // can't use through a wall
}
if (usething->player)
{
pheight = usething->z + (usething->height / 2);
if ((opentop < pheight) || (openbottom > pheight))
{
switch (usething->player->class)
{
case PCLASS_FIGHTER:
sound = SFX_PLAYER_FIGHTER_FAILED_USE;
break;
case PCLASS_CLERIC:
sound = SFX_PLAYER_CLERIC_FAILED_USE;
break;
case PCLASS_MAGE:
sound = SFX_PLAYER_MAGE_FAILED_USE;
break;
case PCLASS_PIG:
sound = SFX_PIG_ACTIVE1;
break;
default:
sound = SFX_NONE;
break;
}
S_StartSound(usething, sound);
}
}
return true; // not a special line, but keep checking
}
if (P_PointOnLineSide(usething->x, usething->y, in->d.line) == 1)
return false; // don't use back sides
// P_UseSpecialLine (usething, in->d.line);
P_ActivateLine(in->d.line, usething, 0, SPAC_USE);
return false; // can't use for than one special line in a row
}
/*
================
=
= P_UseLines
=
= Looks for special lines in front of the player to activate
================
*/
void P_UseLines(player_t * player)
{
int angle;
fixed_t x1, y1, x2, y2;
usething = player->mo;
angle = player->mo->angle >> ANGLETOFINESHIFT;
x1 = player->mo->x;
y1 = player->mo->y;
x2 = x1 + (USERANGE >> FRACBITS) * finecosine[angle];
y2 = y1 + (USERANGE >> FRACBITS) * finesine[angle];
P_PathTraverse(x1, y1, x2, y2, PT_ADDLINES, PTR_UseTraverse);
}
//==========================================================================
//
// PTR_PuzzleItemTraverse
//
//==========================================================================
#define USE_PUZZLE_ITEM_SPECIAL 129
static mobj_t *PuzzleItemUser;
static int PuzzleItemType;
static boolean PuzzleActivated;
boolean PTR_PuzzleItemTraverse(intercept_t * in)
{
mobj_t *mobj;
byte args[3];
int sound;
if (in->isaline)
{ // Check line
if (in->d.line->special != USE_PUZZLE_ITEM_SPECIAL)
{
P_LineOpening(in->d.line);
if (openrange <= 0)
{
sound = SFX_NONE;
if (PuzzleItemUser->player)
{
switch (PuzzleItemUser->player->class)
{
case PCLASS_FIGHTER:
sound = SFX_PUZZLE_FAIL_FIGHTER;
break;
case PCLASS_CLERIC:
sound = SFX_PUZZLE_FAIL_CLERIC;
break;
case PCLASS_MAGE:
sound = SFX_PUZZLE_FAIL_MAGE;
break;
default:
sound = SFX_NONE;
break;
}
}
S_StartSound(PuzzleItemUser, sound);
return false; // can't use through a wall
}
return true; // Continue searching
}
if (P_PointOnLineSide(PuzzleItemUser->x, PuzzleItemUser->y,
in->d.line) == 1)
{ // Don't use back sides
return false;
}
if (PuzzleItemType != in->d.line->arg1)
{ // Item type doesn't match
return false;
}
// Construct an args[] array that would contain the values from
// the line that would be passed by Vanilla Hexen.
args[0] = in->d.line->arg3;
args[1] = in->d.line->arg4;
args[2] = in->d.line->arg5;
P_StartACS(in->d.line->arg2, 0, args, PuzzleItemUser, in->d.line, 0);
in->d.line->special = 0;
PuzzleActivated = true;
return false; // Stop searching
}
// Check thing
mobj = in->d.thing;
if (mobj->special != USE_PUZZLE_ITEM_SPECIAL)
{ // Wrong special
return true;
}
if (PuzzleItemType != mobj->args[0])
{ // Item type doesn't match
return true;
}
P_StartACS(mobj->args[1], 0, &mobj->args[2], PuzzleItemUser, NULL, 0);
mobj->special = 0;
PuzzleActivated = true;
return false; // Stop searching
}
//==========================================================================
//
// P_UsePuzzleItem
//
// Returns true if the puzzle item was used on a line or a thing.
//
//==========================================================================
boolean P_UsePuzzleItem(player_t * player, int itemType)
{
int angle;
fixed_t x1, y1, x2, y2;
PuzzleItemType = itemType;
PuzzleItemUser = player->mo;
PuzzleActivated = false;
angle = player->mo->angle >> ANGLETOFINESHIFT;
x1 = player->mo->x;
y1 = player->mo->y;
x2 = x1 + (USERANGE >> FRACBITS) * finecosine[angle];
y2 = y1 + (USERANGE >> FRACBITS) * finesine[angle];
P_PathTraverse(x1, y1, x2, y2, PT_ADDLINES | PT_ADDTHINGS,
PTR_PuzzleItemTraverse);
return PuzzleActivated;
}
/*
==============================================================================
RADIUS ATTACK
==============================================================================
*/
mobj_t *bombsource;
mobj_t *bombspot;
int bombdamage;
int bombdistance;
boolean DamageSource;
/*
=================
=
= PIT_RadiusAttack
=
= Source is the creature that casued the explosion at spot
=================
*/
boolean PIT_RadiusAttack(mobj_t * thing)
{
fixed_t dx, dy, dist;
int damage;
if (!(thing->flags & MF_SHOOTABLE))
{
return true;
}
// if(thing->flags2&MF2_BOSS)
// { // Bosses take no damage from PIT_RadiusAttack
// return(true);
// }
if (!DamageSource && thing == bombsource)
{ // don't damage the source of the explosion
return true;
}
if (abs((thing->z - bombspot->z) >> FRACBITS) > 2 * bombdistance)
{ // too high/low
return true;
}
dx = abs(thing->x - bombspot->x);
dy = abs(thing->y - bombspot->y);
dist = dx > dy ? dx : dy;
dist = (dist - thing->radius) >> FRACBITS;
if (dist < 0)
{
dist = 0;
}
if (dist >= bombdistance)
{ // Out of range
return true;
}
if (P_CheckSight(thing, bombspot))
{ // OK to damage, target is in direct path
damage = (bombdamage * (bombdistance - dist) / bombdistance) + 1;
if (thing->player)
{
damage >>= 2;
}
P_DamageMobj(thing, bombspot, bombsource, damage);
}
return (true);
}
/*
=================
=
= P_RadiusAttack
=
= Source is the creature that caused the explosion at spot
=================
*/
void P_RadiusAttack(mobj_t * spot, mobj_t * source, int damage, int distance,
boolean damageSource)
{
int x, y, xl, xh, yl, yh;
fixed_t dist;
dist = (distance + MAXRADIUS) << FRACBITS;
yh = (spot->y + dist - bmaporgy) >> MAPBLOCKSHIFT;
yl = (spot->y - dist - bmaporgy) >> MAPBLOCKSHIFT;
xh = (spot->x + dist - bmaporgx) >> MAPBLOCKSHIFT;
xl = (spot->x - dist - bmaporgx) >> MAPBLOCKSHIFT;
bombspot = spot;
bombsource = source;
bombdamage = damage;
bombdistance = distance;
DamageSource = damageSource;
for (y = yl; y <= yh; y++)
{
for (x = xl; x <= xh; x++)
{
P_BlockThingsIterator(x, y, PIT_RadiusAttack);
}
}
}
/*
==============================================================================
SECTOR HEIGHT CHANGING
= After modifying a sectors floor or ceiling height, call this
= routine to adjust the positions of all things that touch the
= sector.
=
= If anything doesn't fit anymore, true will be returned.
= If crunch is true, they will take damage as they are being crushed
= If Crunch is false, you should set the sector height back the way it
= was and call P_ChangeSector again to undo the changes
==============================================================================
*/
int crushchange;
boolean nofit;
/*
===============
=
= PIT_ChangeSector
=
===============
*/
boolean PIT_ChangeSector(mobj_t * thing)
{
mobj_t *mo;
if (P_ThingHeightClip(thing))
return true; // keep checking
// crunch bodies to giblets
if ((thing->flags & MF_CORPSE) && (thing->health <= 0))
{
if (thing->flags & MF_NOBLOOD)
{
P_RemoveMobj(thing);
}
else
{
if (thing->state != &states[S_GIBS1])
{
P_SetMobjState(thing, S_GIBS1);
thing->height = 0;
thing->radius = 0;
S_StartSound(thing, SFX_PLAYER_FALLING_SPLAT);
}
}
return true; // keep checking
}
// crunch dropped items
if (thing->flags2 & MF2_DROPPED)
{
P_RemoveMobj(thing);
return true; // keep checking
}
if (!(thing->flags & MF_SHOOTABLE))
return true; // assume it is bloody gibs or something
nofit = true;
if (crushchange && !(leveltime & 3))
{
P_DamageMobj(thing, NULL, NULL, crushchange);
// spray blood in a random direction
if ((!(thing->flags & MF_NOBLOOD)) &&
(!(thing->flags2 & MF2_INVULNERABLE)))
{
mo = P_SpawnMobj(thing->x, thing->y, thing->z + thing->height / 2,
MT_BLOOD);
mo->momx = P_SubRandom() << 12;
mo->momy = P_SubRandom() << 12;
}
}
return true; // keep checking (crush other things)
}
/*
===============
=
= P_ChangeSector
=
===============
*/
boolean P_ChangeSector(sector_t * sector, int crunch)
{
int x, y;
nofit = false;
crushchange = crunch;
// recheck heights for all things near the moving sector
for (x = sector->blockbox[BOXLEFT]; x <= sector->blockbox[BOXRIGHT]; x++)
for (y = sector->blockbox[BOXBOTTOM]; y <= sector->blockbox[BOXTOP];
y++)
P_BlockThingsIterator(x, y, PIT_ChangeSector);
return nofit;
}