- untested partial refactoring of P_CheckPosition.
(This is just a safety commit before doing some more extensive behind-the-scenes refactoring.) Notable changes here: * use the same logic for determining whether a 3D floor is 'below' or 'above' the actor as all the other functions. * removed the broken code which tried to detect whether an actor was touching a steep slope. Better use P_LineOpening to find the correct planes and store the results. * improved detection whether the slopes on both sides of a plane are identical, using the same data as for steep slope detection.
This commit is contained in:
Christoph Oelckers
parent
abcc6049b9
commit
98c7fabb89
6 changed files with 123 additions and 126 deletions
208
src/p_map.cpp
208
src/p_map.cpp
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@ -276,7 +276,7 @@ static bool PIT_FindFloorCeiling(FMultiBlockLinesIterator &mit, FMultiBlockLines
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void P_GetFloorCeilingZ(FCheckPosition &tmf, int flags)
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{
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sector_t *sec = (!(flags & FFCF_SAMESECTOR) || tmf.thing->Sector == NULL)? P_PointInSector(tmf.x, tmf.y) : tmf.thing->Sector;
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sector_t *sec = (!(flags & FFCF_SAMESECTOR) || tmf.thing->Sector == NULL)? P_PointInSector(tmf.x, tmf.y) : tmf.sector;
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F3DFloor *ffc, *fff;
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tmf.ceilingz = sec->NextHighestCeilingAt(tmf.thing, tmf.z + tmf.thing->height, flags, &tmf.ceilingsector, &ffc);
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@ -316,6 +316,10 @@ void P_FindFloorCeiling(AActor *actor, int flags)
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{
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flags |= FFCF_3DRESTRICT;
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}
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if (flags & FFCF_SAMESECTOR)
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{
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tmf.sector = actor->Sector;
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}
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P_GetFloorCeilingZ(tmf, flags);
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assert(tmf.thing->Sector != NULL);
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@ -759,8 +763,9 @@ int P_GetMoveFactor(const AActor *mo, int *frictionp)
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//==========================================================================
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static // killough 3/26/98: make static
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bool PIT_CheckLine(line_t *ld, const FBoundingBox &box, FCheckPosition &tm)
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bool PIT_CheckLine(FMultiBlockLinesIterator &mit, FMultiBlockLinesIterator::CheckResult &cres, const FBoundingBox &box, FCheckPosition &tm)
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{
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line_t *ld = cres.line;
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bool rail = false;
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if (box.Right() <= ld->bbox[BOXLEFT]
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@ -802,7 +807,6 @@ bool PIT_CheckLine(line_t *ld, const FBoundingBox &box, FCheckPosition &tm)
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bool NotBlocked = ((tm.thing->flags3 & MF3_NOBLOCKMONST)
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|| ((i_compatflags & COMPATF_NOBLOCKFRIENDS) && (tm.thing->flags & MF_FRIENDLY)));
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fixedvec3 pos = tm.thing->PosRelative(ld);
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if (!(Projectile) || (ld->flags & (ML_BLOCKEVERYTHING | ML_BLOCKPROJECTILE)))
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{
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if (ld->flags & ML_RAILING)
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@ -821,55 +825,33 @@ bool PIT_CheckLine(line_t *ld, const FBoundingBox &box, FCheckPosition &tm)
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}
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tm.thing->BlockingLine = ld;
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// Calculate line side based on the actor's original position, not the new one.
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CheckForPushSpecial(ld, P_PointOnLineSide(pos.x, pos.y, ld), tm.thing, false);
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CheckForPushSpecial(ld, P_PointOnLineSide(cres.position.x, cres.position.y, ld), tm.thing, false);
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return false;
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}
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}
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// [RH] Steep sectors count as dropoffs (unless already in one)
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fixedvec2 ref = FindRefPoint(ld, cres.position);
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FLineOpening open;
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P_LineOpening(open, tm.thing, ld, ref.x, ref.y, cres.position.x, cres.position.y, cres.portalflags);
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// [RH] Steep sectors count as dropoffs, if the actor touches the boundary between a steep slope and something else
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if (!(tm.thing->flags & MF_DROPOFF) &&
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!(tm.thing->flags & (MF_NOGRAVITY | MF_NOCLIP)))
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{
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secplane_t frontplane, backplane;
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// Check 3D floors as well
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frontplane = P_FindFloorPlane(ld->frontsector, pos.x, pos.y, tm.thing->floorz);
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backplane = P_FindFloorPlane(ld->backsector, pos.x, pos.y, tm.thing->floorz);
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if (frontplane.c < STEEPSLOPE || backplane.c < STEEPSLOPE)
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if ((open.frontfloorplane.c < STEEPSLOPE) != (open.backfloorplane.c < STEEPSLOPE))
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{
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const msecnode_t *node = tm.thing->touching_sectorlist;
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bool allow = false;
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int count = 0;
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while (node != NULL)
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{
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count++;
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if (node->m_sector->floorplane.c < STEEPSLOPE)
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{
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allow = true;
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break;
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}
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node = node->m_tnext;
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}
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if (!allow)
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{
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return false;
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}
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// on the boundary of a steep slope
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return false;
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}
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}
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fixedvec2 rpos = { tm.x, tm.y };
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fixedvec2 ref = FindRefPoint(ld, rpos);
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FLineOpening open;
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P_LineOpening(open, tm.thing, ld, ref.x, ref.y, tm.x, tm.y, 0);
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// the floorplane on both sides is identical with the current one
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// so don't mess around with the z-position.
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if (ld->frontsector->floorplane == ld->backsector->floorplane &&
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ld->frontsector->floorplane == tm.thing->Sector->floorplane &&
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!ld->frontsector->e->XFloor.ffloors.Size() && !ld->backsector->e->XFloor.ffloors.Size() &&
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!open.abovemidtex)
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// If the floor planes on both sides we should recalculate open.bottom at the actual position we are checking
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// This is to avoid bumpy movement when crossing a linedef with the same slope on both sides.
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if (open.frontfloorplane == open.backfloorplane)
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{
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open.bottom = INT_MIN;
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open.bottom = open.frontfloorplane.ZatPoint(cres.position.x, cres.position.y);
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}
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if (rail &&
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@ -1017,8 +999,9 @@ static bool CanAttackHurt(AActor *victim, AActor *shooter)
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//
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//==========================================================================
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bool PIT_CheckThing(AActor *thing, FCheckPosition &tm)
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bool PIT_CheckThing(FMultiBlockThingsIterator &it, FMultiBlockThingsIterator::CheckResult &cres, const FBoundingBox &box, FCheckPosition &tm)
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{
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AActor *thing = cres.thing;
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fixed_t topz;
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bool solid;
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int damage;
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@ -1440,56 +1423,29 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
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tm.x = x;
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tm.y = y;
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tm.z = thing->Z();
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newsec = P_PointInSector(x, y);
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newsec = tm.sector = P_PointInSector(x, y);
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tm.ceilingline = thing->BlockingLine = NULL;
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// The base floor / ceiling is from the subsector that contains the point.
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// Retrieve the base floor / ceiling from the target location.
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// Any contacted lines the step closer together will adjust them.
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tm.floorz = tm.dropoffz = newsec->LowestFloorAt(x, y, &tm.floorsector);
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tm.ceilingz = newsec->HighestCeilingAt(x, y, &tm.ceilingsector);
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tm.floorpic = tm.floorsector->GetTexture(sector_t::floor);
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tm.floorterrain = tm.floorsector->GetTerrain(sector_t::floor);
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tm.ceilingpic = tm.ceilingsector->GetTexture(sector_t::ceiling);
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tm.touchmidtex = false;
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tm.abovemidtex = false;
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//Added by MC: Fill the tmsector.
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tm.sector = newsec;
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//Check 3D floors
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if (!thing->IsNoClip2() && newsec->e->XFloor.ffloors.Size())
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if (!thing->IsNoClip2())
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{
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F3DFloor* rover;
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fixed_t delta1;
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fixed_t delta2;
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int thingtop = thing->Z() + (thing->height == 0 ? 1 : thing->height);
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for (unsigned i = 0; i<newsec->e->XFloor.ffloors.Size(); i++)
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{
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rover = newsec->e->XFloor.ffloors[i];
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if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
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fixed_t ff_bottom = rover->bottom.plane->ZatPoint(x, y);
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fixed_t ff_top = rover->top.plane->ZatPoint(x, y);
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delta1 = thing->Z() - (ff_bottom + ((ff_top - ff_bottom) / 2));
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delta2 = thingtop - (ff_bottom + ((ff_top - ff_bottom) / 2));
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if (ff_top > tm.floorz && abs(delta1) < abs(delta2))
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{
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tm.floorz = tm.dropoffz = ff_top;
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tm.floorpic = *rover->top.texture;
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tm.floorterrain = rover->model->GetTerrain(rover->top.isceiling);
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}
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if (ff_bottom < tm.ceilingz && abs(delta1) >= abs(delta2))
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{
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tm.ceilingz = ff_bottom;
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tm.ceilingpic = *rover->bottom.texture;
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}
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}
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P_GetFloorCeilingZ(tm, FFCF_SAMESECTOR);
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}
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else
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{
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// With noclip2, we must ignore 3D floors and go right to the uppermost ceiling and lowermost floor.
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tm.floorz = tm.dropoffz = newsec->LowestFloorAt(x, y, &tm.floorsector);
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tm.ceilingz = newsec->HighestCeilingAt(x, y, &tm.ceilingsector);
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tm.floorpic = tm.floorsector->GetTexture(sector_t::floor);
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tm.floorterrain = tm.floorsector->GetTerrain(sector_t::floor);
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tm.ceilingpic = tm.ceilingsector->GetTexture(sector_t::ceiling);
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}
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tm.touchmidtex = false;
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tm.abovemidtex = false;
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validcount++;
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spechit.Clear();
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@ -1507,51 +1463,52 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
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tm.stepthing = NULL;
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FBoundingBox box(x, y, thing->radius);
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{
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FBlockThingsIterator it2(box);
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AActor *th;
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while ((th = it2.Next()))
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{
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if (!PIT_CheckThing(th, tm))
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{ // [RH] If a thing can be stepped up on, we need to continue checking
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// other things in the blocks and see if we hit something that is
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// definitely blocking. Otherwise, we need to check the lines, or we
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// could end up stuck inside a wall.
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AActor *BlockingMobj = thing->BlockingMobj;
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FPortalGroupArray pcheck;
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FMultiBlockThingsIterator it2(pcheck, x, y, thing->Z(), thing->height, thing->radius);
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FMultiBlockThingsIterator::CheckResult tcres;
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if (BlockingMobj == NULL || (i_compatflags & COMPATF_NO_PASSMOBJ))
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{ // Thing slammed into something; don't let it move now.
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thing->height = realheight;
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return false;
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}
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else if (!BlockingMobj->player && !(thing->flags & (MF_FLOAT | MF_MISSILE | MF_SKULLFLY)) &&
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BlockingMobj->Top() - thing->Z() <= thing->MaxStepHeight)
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{
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if (thingblocker == NULL ||
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BlockingMobj->Z() > thingblocker->Z())
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{
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thingblocker = BlockingMobj;
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}
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thing->BlockingMobj = NULL;
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}
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else if (thing->player &&
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thing->Top() - BlockingMobj->Z() <= thing->MaxStepHeight)
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while ((it2.Next(&tcres)))
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{
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if (!PIT_CheckThing(it2, tcres, it2.Box(), tm))
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{ // [RH] If a thing can be stepped up on, we need to continue checking
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// other things in the blocks and see if we hit something that is
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// definitely blocking. Otherwise, we need to check the lines, or we
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// could end up stuck inside a wall.
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AActor *BlockingMobj = thing->BlockingMobj;
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// If this blocks through a line portal with a vertical displacement, it will always completely block. There is no way to step up onto such an actor.
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if (BlockingMobj == NULL || (i_compatflags & COMPATF_NO_PASSMOBJ) || tcres.zdiff != 0)
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{ // Thing slammed into something; don't let it move now.
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thing->height = realheight;
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return false;
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}
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else if (!BlockingMobj->player && !(thing->flags & (MF_FLOAT | MF_MISSILE | MF_SKULLFLY)) &&
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BlockingMobj->Top() - thing->Z() <= thing->MaxStepHeight)
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{
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if (thingblocker == NULL ||
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BlockingMobj->Z() > thingblocker->Z())
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{
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if (thingblocker)
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{ // There is something to step up on. Return this thing as
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// the blocker so that we don't step up.
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thing->height = realheight;
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return false;
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}
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// Nothing is blocking us, but this actor potentially could
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// if there is something else to step on.
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thing->BlockingMobj = NULL;
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thingblocker = BlockingMobj;
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}
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else
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{ // Definitely blocking
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thing->BlockingMobj = NULL;
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}
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else if (thing->player &&
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thing->Top() - BlockingMobj->Z() <= thing->MaxStepHeight)
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{
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if (thingblocker)
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{ // There is something to step up on. Return this thing as
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// the blocker so that we don't step up.
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thing->height = realheight;
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return false;
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}
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// Nothing is blocking us, but this actor potentially could
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// if there is something else to step on.
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thing->BlockingMobj = NULL;
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}
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else
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{ // Definitely blocking
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thing->height = realheight;
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return false;
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}
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}
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}
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@ -1574,7 +1531,8 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
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if (actorsonly || (thing->flags & MF_NOCLIP))
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return (thing->BlockingMobj = thingblocker) == NULL;
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FBlockLinesIterator it(box);
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FMultiBlockLinesIterator it(pcheck, thing);
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FMultiBlockLinesIterator::CheckResult lcres;
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line_t *ld;
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fixed_t thingdropoffz = tm.floorz;
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@ -1583,9 +1541,9 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
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bool good = true;
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while ((ld = it.Next()))
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while (it.Next(&lcres))
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{
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good &= PIT_CheckLine(ld, box, tm);
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good &= PIT_CheckLine(it, lcres, it.Box(), tm);
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}
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if (!good)
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{
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