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p_map.c
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p_map.c
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#include <stdlib.h>
#include "doomdef.h"
#include "d_think.h"
#include "p_pspr.h"
#include "doomstat.h"
#include "r_main.h"
#include "p_mobj.h"
#include "p_maputl.h"
#include "p_map.h"
#include "p_setup.h"
#include "p_spec.h"
#include "s_sound.h"
#include "p_inter.h"
#include "m_random.h"
#include "i_system.h"
#include "z_zone.h"
#include "z_bmalloc.h"
IMPLEMENT_BLOCK_MEMORY_ALLOC_ZONE(secnodezone, sizeof(msecnode_t), PU_LEVEL, 32, "SecNodes");
static mobj_t *tmthing;
static int tmx;
static int tmy;
static int pe_x;
static int pe_y;
static int ls_x;
static int ls_y;
boolean floatok;
boolean felldown;
int tmbbox[4];
int tmfloorz;
static int tmceilingz;
static int tmdropoffz;
line_t *ceilingline;
line_t *blockline;
static line_t *floorline;
static int tmunstuck;
line_t **spechit;
static int spechit_max;
int numspechit;
msecnode_t *sector_list = NULL;
static boolean telefrag;
static int bestslidefrac;
static line_t *bestslideline;
static mobj_t *slidemo;
static int tmxmove;
static int tmymove;
mobj_t *linetarget;
static mobj_t *shootthing;
static uint_64_t aim_flags_mask;
static int shootz;
static int la_damage;
int attackrange;
static int aimslope;
static int topslope;
static int bottomslope;
static mobj_t *bombsource, *bombspot;
static int bombdamage;
static mobj_t *usething;
static boolean crushchange, nofit;
boolean PIT_StompThing(mobj_t* thing)
{
int blockdist;
if (thing == tmthing)
return true;
if (!(thing->flags & MF_SHOOTABLE))
return true;
blockdist = thing->radius + tmthing->radius;
if (D_abs(thing->x - tmx) >= blockdist || D_abs(thing->y - tmy) >= blockdist)
return true;
if (!telefrag)
return false;
P_DamageMobj (thing, tmthing, tmthing, 10000);
return true;
}
int P_GetFriction(const mobj_t *mo, int *frictionfactor)
{
int friction = ORIG_FRICTION;
int movefactor = ORIG_FRICTION_FACTOR;
const msecnode_t *m;
const sector_t *sec;
if (!(mo->flags & (MF_NOCLIP|MF_NOGRAVITY)) && mo->player)
for (m = mo->touching_sectorlist; m; m = m->m_tnext)
if ((sec = m->m_sector)->special & FRICTION_MASK && (sec->friction < friction || friction == ORIG_FRICTION) && (mo->z <= sec->floorheight || (sec->heightsec != -1 && mo->z <= sectors[sec->heightsec].floorheight)))
friction = sec->friction, movefactor = sec->movefactor;
if (frictionfactor)
*frictionfactor = movefactor;
return friction;
}
int P_GetMoveFactor(const mobj_t *mo, int *frictionp)
{
int movefactor, friction;
if ((friction = P_GetFriction(mo, &movefactor)) < ORIG_FRICTION)
{
int momentum = P_AproxDistance(mo->momx, mo->momy);
if (momentum > MORE_FRICTION_MOMENTUM << 2)
movefactor <<= 3;
else if (momentum > MORE_FRICTION_MOMENTUM << 1)
movefactor <<= 2;
else if (momentum > MORE_FRICTION_MOMENTUM)
movefactor <<= 1;
}
if (frictionp)
*frictionp = friction;
return movefactor;
}
boolean P_TeleportMove(mobj_t* thing,int x,int y, boolean boss)
{
int xl;
int xh;
int yl;
int yh;
int bx;
int by;
subsector_t *newsubsec;
telefrag = thing->player || boss;
tmthing = thing;
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;
tmfloorz = tmdropoffz = newsubsec->sector->floorheight;
tmceilingz = newsubsec->sector->ceilingheight;
validcount++;
numspechit = 0;
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;
P_UnsetThingPosition(thing);
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->dropoffz = tmdropoffz;
thing->x = x;
thing->y = y;
P_SetThingPosition (thing);
thing->PrevX = x;
thing->PrevY = y;
thing->PrevZ = thing->floorz;
return true;
}
static boolean PIT_CrossLine(line_t* ld)
{
if (!(ld->flags & ML_TWOSIDED) || (ld->flags & (ML_BLOCKING|ML_BLOCKMONSTERS)))
if (!(tmbbox[BOXLEFT] > ld->bbox[BOXRIGHT] || tmbbox[BOXRIGHT] < ld->bbox[BOXLEFT] || tmbbox[BOXTOP] < ld->bbox[BOXBOTTOM] || tmbbox[BOXBOTTOM] > ld->bbox[BOXTOP]))
if (P_PointOnLineSide(pe_x,pe_y,ld) != P_PointOnLineSide(ls_x,ls_y,ld))
return false;
return true;
}
static int untouched(line_t *ld)
{
int x, y, tmbbox[4];
return (tmbbox[BOXRIGHT] = (x=tmthing->x)+tmthing->radius) <= ld->bbox[BOXLEFT] || (tmbbox[BOXLEFT] = x-tmthing->radius) >= ld->bbox[BOXRIGHT] || (tmbbox[BOXTOP] = (y=tmthing->y)+tmthing->radius) <= ld->bbox[BOXBOTTOM] || (tmbbox[BOXBOTTOM] = y-tmthing->radius) >= ld->bbox[BOXTOP] || P_BoxOnLineSide(tmbbox, ld) != -1;
}
static 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;
if (!ld->backsector)
{
blockline = ld;
return tmunstuck && !untouched(ld) && FixedMul(tmx - tmthing->x, ld->dy) > FixedMul(tmy - tmthing->y, ld->dx);
}
if (!(tmthing->flags & (MF_MISSILE | MF_BOUNCES)))
{
if (ld->flags & ML_BLOCKING)
return tmunstuck && !untouched(ld);
if (!(tmthing->flags & MF_FRIEND || tmthing->player) && ld->flags & ML_BLOCKMONSTERS)
return false;
}
P_LineOpening (ld);
if (opentop < tmceilingz)
{
tmceilingz = opentop;
ceilingline = ld;
blockline = ld;
}
if (openbottom > tmfloorz)
{
tmfloorz = openbottom;
floorline = ld;
blockline = ld;
}
if (lowfloor < tmdropoffz)
tmdropoffz = lowfloor;
if (ld->special)
{
if (numspechit >= spechit_max)
{
spechit_max = spechit_max ? spechit_max * 2 : 8;
spechit = realloc(spechit, sizeof *spechit * spechit_max);
}
spechit[numspechit++] = ld;
}
return true;
}
static boolean PIT_CheckThing(mobj_t *thing)
{
int blockdist;
int damage;
if (!(thing->flags & (MF_SOLID|MF_SPECIAL|MF_SHOOTABLE|MF_TOUCHY)))
return true;
blockdist = thing->radius + tmthing->radius;
if (D_abs(thing->x - tmx) >= blockdist || D_abs(thing->y - tmy) >= blockdist)
return true;
if (thing == tmthing)
return true;
if (thing->flags & MF_TOUCHY && tmthing->flags & MF_SOLID && thing->health > 0 && (thing->intflags & MIF_ARMED || sentient(thing)) && (thing->type != tmthing->type || thing->type == MT_PLAYER) && thing->z + thing->height >= tmthing->z && tmthing->z + tmthing->height >= thing->z && (thing->type ^ MT_PAIN) | (tmthing->type ^ MT_SKULL) && (thing->type ^ MT_SKULL) | (tmthing->type ^ MT_PAIN))
{
P_DamageMobj(thing, NULL, NULL, thing->health);
return true;
}
if (tmthing->flags & MF_SKULLFLY)
{
int damage = ((P_Random(pr_skullfly) % 8) + 1) * tmthing->info->damage;
P_DamageMobj (thing, tmthing, tmthing, damage);
tmthing->flags &= ~MF_SKULLFLY;
tmthing->momx = tmthing->momy = tmthing->momz = 0;
P_SetMobjState (tmthing, tmthing->info->spawnstate);
return false;
}
if (tmthing->flags & MF_MISSILE || (tmthing->flags & MF_BOUNCES && !(tmthing->flags & MF_SOLID)))
{
if (tmthing->z > thing->z + thing->height)
return true;
if (tmthing->z+tmthing->height < thing->z)
return true;
if (tmthing->target && (tmthing->target->type == thing->type || (tmthing->target->type == MT_KNIGHT && thing->type == MT_BRUISER) || (tmthing->target->type == MT_BRUISER && thing->type == MT_KNIGHT)))
{
if (thing == tmthing->target)
return true;
else if (thing->type != MT_PLAYER)
return false;
}
if (!(tmthing->flags & MF_MISSILE))
{
if (!(thing->flags & MF_SOLID))
{
return true;
}
else
{
tmthing->momx = -tmthing->momx;
tmthing->momy = -tmthing->momy;
if (!(tmthing->flags & MF_NOGRAVITY))
{
tmthing->momx >>= 2;
tmthing->momy >>= 2;
}
return false;
}
}
if (!(thing->flags & MF_SHOOTABLE))
return !(thing->flags & MF_SOLID);
damage = ((P_Random(pr_damage)%8)+1)*tmthing->info->damage;
P_DamageMobj(thing, tmthing, tmthing->target, damage);
return false;
}
if (thing->flags & MF_SPECIAL)
{
uint_64_t solid = thing->flags & MF_SOLID;
if (tmthing->flags & MF_PICKUP)
P_TouchSpecialThing(thing, tmthing);
return !solid;
}
return !(thing->flags & MF_SOLID) || ((thing->flags & MF_NOCLIP || !(tmthing->flags & MF_SOLID)));
}
boolean Check_Sides(mobj_t* actor, int x, int y)
{
int bx, by, xl, xh, yl, yh;
pe_x = actor->x;
pe_y = actor->y;
ls_x = x;
ls_y = y;
tmbbox[BOXLEFT] = pe_x < x ? pe_x : x;
tmbbox[BOXRIGHT] = pe_x > x ? pe_x : x;
tmbbox[BOXTOP] = pe_y > y ? pe_y : y;
tmbbox[BOXBOTTOM] = pe_y < y ? pe_y : y;
xl = (tmbbox[BOXLEFT] - bmaporgx) >> MAPBLOCKSHIFT;
xh = (tmbbox[BOXRIGHT] - bmaporgx) >> MAPBLOCKSHIFT;
yl = (tmbbox[BOXBOTTOM] - bmaporgy) >> MAPBLOCKSHIFT;
yh = (tmbbox[BOXTOP] - bmaporgy) >> MAPBLOCKSHIFT;
validcount++;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
if (!P_BlockLinesIterator(bx,by,PIT_CrossLine))
return true;
return false;
}
boolean P_CheckPosition (mobj_t* thing, int x, int y)
{
int xl;
int xh;
int yl;
int yh;
int bx;
int by;
subsector_t *newsubsec;
tmthing = thing;
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);
floorline = blockline = ceilingline = NULL;
tmunstuck = thing->player && thing->player->mo == thing;
tmfloorz = tmdropoffz = newsubsec->sector->floorheight;
tmceilingz = newsubsec->sector->ceilingheight;
validcount++;
numspechit = 0;
if (tmthing->flags & MF_NOCLIP)
return true;
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_CheckThing))
return false;
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;
}
boolean P_TryMove(mobj_t* thing, int x, int y, boolean dropoff)
{
int oldx;
int oldy;
felldown = floatok = false;
if (!P_CheckPosition (thing, x, y))
return false;
if (!(thing->flags & MF_NOCLIP))
{
if (tmceilingz - tmfloorz < thing->height || (floatok = true, !(thing->flags & MF_TELEPORT) && tmceilingz - thing->z < thing->height) || (!(thing->flags & MF_TELEPORT) && tmfloorz - thing->z > 24 * FRACUNIT))
return tmunstuck && !(ceilingline && untouched(ceilingline)) && !(floorline && untouched(floorline));
if (!(thing->flags & (MF_DROPOFF|MF_FLOAT)))
{
if (!dropoff || (dropoff == 2 && (tmfloorz-tmdropoffz > 128 * FRACUNIT || !thing->target || thing->target->z >tmdropoffz)))
{
if (thing->floorz - tmfloorz > 24 * FRACUNIT || thing->dropoffz - tmdropoffz > 24 * FRACUNIT)
return false;
}
else
{
felldown = !(thing->flags & MF_NOGRAVITY) && thing->z - tmfloorz > 24 * FRACUNIT;
}
}
if (thing->flags & MF_BOUNCES && !(thing->flags & (MF_MISSILE|MF_NOGRAVITY)) && !sentient(thing) && tmfloorz - thing->z > 16 * FRACUNIT)
return false;
if (thing->intflags & MIF_FALLING && tmfloorz - thing->z > FixedMul(thing->momx,thing->momx)+FixedMul(thing->momy,thing->momy))
return false;
}
P_UnsetThingPosition (thing);
oldx = thing->x;
oldy = thing->y;
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->dropoffz = tmdropoffz;
thing->x = x;
thing->y = y;
P_SetThingPosition(thing);
if (!(thing->flags & (MF_TELEPORT|MF_NOCLIP)))
{
while (numspechit--)
{
if (spechit[numspechit]->special)
{
int oldside;
if ((oldside = P_PointOnLineSide(oldx, oldy, spechit[numspechit])) != P_PointOnLineSide(thing->x, thing->y, spechit[numspechit]))
P_CrossSpecialLine(spechit[numspechit], oldside, thing);
}
}
}
return true;
}
static boolean PIT_ApplyTorque(line_t *ld)
{
if (ld->backsector && tmbbox[BOXRIGHT] > ld->bbox[BOXLEFT] && tmbbox[BOXLEFT] < ld->bbox[BOXRIGHT] && tmbbox[BOXTOP] > ld->bbox[BOXBOTTOM] && tmbbox[BOXBOTTOM] < ld->bbox[BOXTOP] && P_BoxOnLineSide(tmbbox, ld) == -1)
{
mobj_t *mo = tmthing;
int dist = (ld->dx >> FRACBITS) * (mo->y >> FRACBITS) - (ld->dy >> FRACBITS) * (mo->x >> FRACBITS) - (ld->dx >> FRACBITS) * (ld->v1->y >> FRACBITS) + (ld->dy >> FRACBITS) * (ld->v1->x >> FRACBITS);
if (dist < 0 ? ld->frontsector->floorheight < mo->z && ld->backsector->floorheight >= mo->z : ld->backsector->floorheight < mo->z && ld->frontsector->floorheight >= mo->z)
{
int x = D_abs(ld->dx), y = D_abs(ld->dy);
if (y > x)
{
int t = x;
x = y;
y = t;
}
y = finesine[(tantoangle[FixedDiv(y,x) >> DBITS] + ANG90) >> ANGLETOFINESHIFT];
dist = FixedDiv(FixedMul(dist, (mo->gear < OVERDRIVE) ? y << -(mo->gear - OVERDRIVE) : y >> (mo->gear - OVERDRIVE)), x);
x = FixedMul(ld->dy, dist);
y = FixedMul(ld->dx, dist);
dist = FixedMul(x, x) + FixedMul(y, y);
while (dist > FRACUNIT * 4 && mo->gear < MAXGEAR)
++mo->gear, x >>= 1, y >>= 1, dist >>= 1;
mo->momx -= x;
mo->momy += y;
}
}
return true;
}
void P_ApplyTorque(mobj_t *mo)
{
int xl = ((tmbbox[BOXLEFT] = mo->x - mo->radius) - bmaporgx) >> MAPBLOCKSHIFT;
int xh = ((tmbbox[BOXRIGHT] = mo->x + mo->radius) - bmaporgx) >> MAPBLOCKSHIFT;
int yl = ((tmbbox[BOXBOTTOM] = mo->y - mo->radius) - bmaporgy) >> MAPBLOCKSHIFT;
int yh = ((tmbbox[BOXTOP] = mo->y + mo->radius) - bmaporgy) >> MAPBLOCKSHIFT;
int bx, by, flags = mo->intflags;
tmthing = mo;
validcount++;
for (bx = xl; bx <= xh; bx++)
for (by = yl; by <= yh; by++)
P_BlockLinesIterator(bx, by, PIT_ApplyTorque);
if (mo->momx | mo->momy)
mo->intflags |= MIF_FALLING;
else
mo->intflags &= ~MIF_FALLING;
if (!((mo->intflags | flags) & MIF_FALLING))
mo->gear = 0;
else if (mo->gear < MAXGEAR)
mo->gear++;
}
boolean P_ThingHeightClip(mobj_t *thing)
{
boolean onfloor = (thing->z == thing->floorz);
P_CheckPosition(thing, thing->x, thing->y);
thing->floorz = tmfloorz;
thing->ceilingz = tmceilingz;
thing->dropoffz = tmdropoffz;
if (onfloor)
{
thing->z = thing->floorz;
if (thing->intflags & MIF_FALLING && thing->gear >= MAXGEAR)
thing->gear = 0;
}
else
{
if (thing->z + thing->height > thing->ceilingz)
thing->z = thing->ceilingz - thing->height;
}
return thing->ceilingz - thing->floorz >= thing->height;
}
void P_HitSlideLine (line_t* ld)
{
int side;
angle_t lineangle;
angle_t moveangle;
angle_t deltaangle;
int movelen;
int newlen;
boolean icyfloor = P_AproxDistance(tmxmove, tmymove) > 4 * FRACUNIT && slidemo->z <= slidemo->floorz && P_GetFriction(slidemo, NULL) > ORIG_FRICTION;
if (ld->slopetype == ST_HORIZONTAL)
{
if (icyfloor && (D_abs(tmymove) > D_abs(tmxmove)))
{
tmxmove /= 2;
tmymove = -tmymove / 2;
S_StartSound(slidemo, sfx_oof);
}
else
tmymove = 0;
return;
}
if (ld->slopetype == ST_VERTICAL)
{
if (icyfloor && (D_abs(tmxmove) > D_abs(tmymove)))
{
tmxmove = -tmxmove / 2;
tmymove /= 2;
S_StartSound(slidemo, sfx_oof);
}
else
{
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);
moveangle += 10;
deltaangle = moveangle - lineangle;
movelen = P_AproxDistance(tmxmove, tmymove);
if (icyfloor && (deltaangle > ANG45) && (deltaangle < ANG90 + ANG45))
{
moveangle = lineangle - deltaangle;
movelen /= 2;
S_StartSound(slidemo, sfx_oof);
moveangle >>= ANGLETOFINESHIFT;
tmxmove = FixedMul (movelen, finecosine[moveangle]);
tmymove = FixedMul (movelen, finesine[moveangle]);
}
else
{
if (deltaangle > ANG180)
deltaangle += ANG180;
lineangle >>= ANGLETOFINESHIFT;
deltaangle >>= ANGLETOFINESHIFT;
newlen = FixedMul(movelen, finecosine[deltaangle]);
tmxmove = FixedMul(newlen, finecosine[lineangle]);
tmymove = FixedMul(newlen, finesine[lineangle]);
}
}
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;
goto isblocking;
}
P_LineOpening(li);
if (openrange < slidemo->height)
goto isblocking;
if (opentop - slidemo->z < slidemo->height)
goto isblocking;
if (openbottom - slidemo->z > 24 * FRACUNIT)
goto isblocking;
return true;
isblocking:
if (in->frac < bestslidefrac)
{
bestslidefrac = in->frac;
bestslideline = li;
}
return false;
}
void P_SlideMove(mobj_t *mo)
{
int hitcount = 3;
slidemo = mo;
do
{
int leadx, leady, trailx, traily;
if (!--hitcount)
goto stairstep;
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);
if (bestslidefrac == FRACUNIT+1)
{
stairstep:
if (!P_TryMove(mo, mo->x, mo->y + mo->momy, true))
P_TryMove(mo, mo->x + mo->momx, mo->y, true);
break;
}
if ((bestslidefrac -= 0x800) > 0)
{
int newx = FixedMul(mo->momx, bestslidefrac);
int newy = FixedMul(mo->momy, bestslidefrac);
if (!P_TryMove(mo, mo->x + newx, mo->y + newy, true))
goto stairstep;
}
bestslidefrac = FRACUNIT - (bestslidefrac + 0x800);
if (bestslidefrac > FRACUNIT)
bestslidefrac = FRACUNIT;
if (bestslidefrac <= 0)
break;
tmxmove = FixedMul(mo->momx, bestslidefrac);
tmymove = FixedMul(mo->momy, bestslidefrac);
P_HitSlideLine(bestslideline);
mo->momx = tmxmove;
mo->momy = tmymove;
if (mo->player && mo->player->mo == mo)
{
if (D_abs(mo->player->momx) > D_abs(tmxmove))
mo->player->momx = tmxmove;
if (D_abs(mo->player->momy) > D_abs(tmymove))
mo->player->momy = tmymove;
}
}
while (!P_TryMove(mo, mo->x + tmxmove, mo->y + tmymove, true));
}
boolean PTR_AimTraverse (intercept_t* in)
{
line_t *li;
mobj_t *th;
int slope;
int thingtopslope;
int thingbottomslope;
int dist;
if (in->isaline)
{
li = in->d.line;
if (!(li->flags & ML_TWOSIDED))
return false;
P_LineOpening(li);
if (openbottom >= opentop)
return false;
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;
return true;
}
th = in->d.thing;
if (th == shootthing)
return true;
if (!(th->flags & MF_SHOOTABLE))
return true;
if (th->flags & shootthing->flags & aim_flags_mask && !th->player)
return true;
dist = FixedMul(attackrange, in->frac);
thingtopslope = FixedDiv (th->z + th->height - shootz, dist);
if (thingtopslope < bottomslope)
return true;
thingbottomslope = FixedDiv(th->z - shootz, dist);
if (thingbottomslope > topslope)
return true;
if (thingtopslope > topslope)
thingtopslope = topslope;
if (thingbottomslope < bottomslope)
thingbottomslope = bottomslope;
aimslope = (thingtopslope + thingbottomslope) / 2;
linetarget = th;
return false;
}
boolean PTR_ShootTraverse (intercept_t *in)
{
int x;
int y;
int z;
int frac;
mobj_t* th;
int slope;
int dist;
int thingtopslope;
int thingbottomslope;
if (in->isaline)
{
line_t *li = in->d.line;
if (li->special)
P_ShootSpecialLine(shootthing, li);