/
r_world.cpp
1681 lines (1418 loc) · 50.3 KB
/
r_world.cpp
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/** @file r_world.cpp World Setup/Refresh.
*
* @authors Copyright © 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
* @authors Copyright © 2006-2013 Daniel Swanson <danij@dengine.net>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. This program is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details. You should have received a copy of the GNU
* General Public License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA</small>
*/
#include <cmath>
#include <cstdlib>
#include <cstring>
#include "de_base.h"
#include "de_console.h"
#include "de_system.h"
#include "de_network.h"
#include "de_play.h"
#include "de_render.h"
#include "de_graphics.h"
#include "de_audio.h"
#include "de_misc.h"
#include "map/plane.h"
#ifdef __CLIENT__
# include "MaterialSnapshot"
# include "MaterialVariantSpec"
#endif
#include <de/Observers>
// $smoothplane: Maximum speed for a smoothed plane.
#define MAX_SMOOTH_PLANE_MOVE (64)
// $smoothmatoffset: Maximum speed for a smoothed material offset.
#define MAX_SMOOTH_MATERIAL_MOVE (8)
using namespace de;
float rendLightWallAngle = 1.2f; // Intensity of angle-based wall lighting.
byte rendLightWallAngleSmooth = true;
float rendSkyLight = .2f; // Intensity factor.
byte rendSkyLightAuto = true;
boolean firstFrameAfterLoad;
boolean ddMapSetup;
/// Notified when the current map changes.
MapChangeAudience audienceForMapChange;
/**
* $smoothmatoffset: Roll the surface material offset tracker buffers.
*/
void R_UpdateSurfaceScroll()
{
if(!theMap) return;
foreach(Surface *surface, theMap->scrollingSurfaces())
{
// X Offset
surface->oldOffset[0][0] = surface->oldOffset[0][1];
surface->oldOffset[0][1] = surface->offset[0];
if(surface->oldOffset[0][0] != surface->oldOffset[0][1])
if(de::abs(surface->oldOffset[0][0] - surface->oldOffset[0][1]) >=
MAX_SMOOTH_MATERIAL_MOVE)
{
// Too fast: make an instantaneous jump.
surface->oldOffset[0][0] = surface->oldOffset[0][1];
}
// Y Offset
surface->oldOffset[1][0] = surface->oldOffset[1][1];
surface->oldOffset[1][1] = surface->offset[1];
if(surface->oldOffset[1][0] != surface->oldOffset[1][1])
if(de::abs(surface->oldOffset[1][0] - surface->oldOffset[1][1]) >=
MAX_SMOOTH_MATERIAL_MOVE)
{
// Too fast: make an instantaneous jump.
surface->oldOffset[1][0] = surface->oldOffset[1][1];
}
}
}
/**
* $smoothmatoffset: interpolate the visual offset.
*/
void R_InterpolateSurfaceScroll(boolean resetNextViewer)
{
if(!theMap) return;
SurfaceSet &surfaces = theMap->scrollingSurfaces();
SurfaceSet::iterator it = surfaces.begin();
while(it != surfaces.end())
{
Surface &suf = **it;
if(resetNextViewer)
{
// Reset the material offset trackers.
// X Offset.
suf.visOffsetDelta[0] = 0;
suf.oldOffset[0][0] = suf.oldOffset[0][1] = suf.offset[0];
// Y Offset.
suf.visOffsetDelta[1] = 0;
suf.oldOffset[1][0] = suf.oldOffset[1][1] = suf.offset[1];
suf.update();
it++;
}
// While the game is paused there is no need to calculate any
// visual material offsets.
else //if(!clientPaused)
{
// Set the visible material offsets.
// X Offset.
suf.visOffsetDelta[0] =
suf.oldOffset[0][0] * (1 - frameTimePos) +
suf.offset[0] * frameTimePos - suf.offset[0];
// Y Offset.
suf.visOffsetDelta[1] =
suf.oldOffset[1][0] * (1 - frameTimePos) +
suf.offset[1] * frameTimePos - suf.offset[1];
// Visible material offset.
suf.visOffset[0] = suf.offset[0] + suf.visOffsetDelta[0];
suf.visOffset[1] = suf.offset[1] + suf.visOffsetDelta[1];
suf.update();
// Has this material reached its destination?
if(suf.visOffset[0] == suf.offset[0] && suf.visOffset[1] == suf.offset[1])
{
it = surfaces.erase(it);
}
else
{
it++;
}
}
}
}
void R_AddTrackedPlane(PlaneSet *plist, Plane *pln)
{
if(!plist || !pln) return;
plist->insert(pln);
}
boolean R_RemoveTrackedPlane(PlaneSet *plist, Plane *pln)
{
if(!plist || !pln) return false;
return plist->remove(pln);
}
/**
* $smoothplane: Roll the height tracker buffers.
*/
void R_UpdateTrackedPlanes()
{
if(!theMap) return;
PlaneSet* plist = GameMap_TrackedPlanes(theMap);
if(!plist) return;
DENG2_FOR_EACH(PlaneSet, i, *plist)
{
Plane *pln = *i;
pln->oldHeight[0] = pln->oldHeight[1];
pln->oldHeight[1] = pln->height;
if(pln->oldHeight[0] != pln->oldHeight[1])
{
if(fabs(pln->oldHeight[0] - pln->oldHeight[1]) >=
MAX_SMOOTH_PLANE_MOVE)
{
// Too fast: make an instantaneous jump.
pln->oldHeight[0] = pln->oldHeight[1];
}
}
}
}
/**
* $smoothplane: interpolate the visual offset.
*/
void R_InterpolateTrackedPlanes(boolean resetNextViewer)
{
if(!theMap) return;
PlaneSet* plist = GameMap_TrackedPlanes(theMap);
if(!plist) return;
if(resetNextViewer)
{
// $smoothplane: Reset the plane height trackers.
DENG2_FOR_EACH(PlaneSet, i, *plist)
{
Plane *pln = *i;
pln->visHeightDelta = 0;
pln->visHeight = pln->oldHeight[0] = pln->oldHeight[1] = pln->height;
if(pln->type == PLN_FLOOR || pln->type == PLN_CEILING)
{
R_MarkDependantSurfacesForDecorationUpdate(pln);
}
}
// Tracked movement is now all done.
plist->clear();
}
// While the game is paused there is no need to calculate any
// visual plane offsets $smoothplane.
else //if(!clientPaused)
{
// $smoothplane: Set the visible offsets.
QMutableSetIterator<Plane *> iter(*plist);
while(iter.hasNext())
{
Plane *pln = iter.next();
pln->visHeightDelta = pln->oldHeight[0] * (1 - frameTimePos) +
pln->height * frameTimePos -
pln->height;
// Visible plane height.
pln->visHeight = pln->height + pln->visHeightDelta;
if(pln->type == PLN_FLOOR || pln->type == PLN_CEILING)
{
R_MarkDependantSurfacesForDecorationUpdate(pln);
}
// Has this plane reached its destination?
if(pln->visHeight == pln->height) /// @todo Can this fail? (float equality)
{
iter.remove();
}
}
}
}
/**
* To be called when a floor or ceiling height changes to update the plotted
* decoration origins for surfaces whose material offset is dependant upon
* the given plane.
*/
void R_MarkDependantSurfacesForDecorationUpdate(Plane *pln)
{
if(!pln || !pln->sector->lineDefs) return;
// "Middle" planes have no dependent surfaces.
if(pln->type == PLN_MID) return;
// Mark the decor lights on the sides of this plane as requiring
// an update.
LineDef **linep = pln->sector->lineDefs;
while(*linep)
{
LineDef *li = *linep;
li->L_frontsidedef->SW_surface(SS_MIDDLE).update();
li->L_frontsidedef->SW_surface(SS_BOTTOM).update();
li->L_frontsidedef->SW_surface(SS_TOP).update();
if(li->L_backsidedef)
{
li->L_backsidedef->SW_surface(SS_MIDDLE).update();
li->L_backsidedef->SW_surface(SS_BOTTOM).update();
li->L_backsidedef->SW_surface(SS_TOP).update();
}
linep++;
}
}
void R_UpdateMapSurfacesOnMaterialChange(Material *material)
{
if(!material || ddMapSetup) return;
if(!theMap) return;
#ifdef __CLIENT__
foreach(Surface *surface, theMap->decoratedSurfaces())
{
if(material == surface->material)
{
surface->update();
}
}
#endif
}
/**
* Create a new plane for the given sector. The plane will be initialized
* with default values.
*
* Post: The sector's plane list will be replaced, the new plane will be
* linked to the end of the list.
*
* @param sec Sector for which a new plane will be created.
*
* @return Ptr to the newly created plane.
*/
Plane *R_NewPlaneForSector(Sector *sec)
{
if(!sec) return NULL; // Do wha?
// Allocate the new plane.
Plane *plane = new Plane(*sec, de::Vector3f(0, 0, 1));
plane->type = PLN_MID;
// Resize this sector's plane list.
sec->planes.append(plane);
plane->planeID = sec->planes.size() - 1;
// Initialize the surface.
Surface *suf = &plane->surface;
/// @todo The initial material should be the "unknown" material.
suf->updateBaseOrigin();
#ifdef __CLIENT__
/**
* Resize the biassurface lists for the BSP leaf planes.
* If we are in map setup mode, don't create the biassurfaces now,
* as planes are created before the bias system is available.
*/
if(sec->bspLeafs && *sec->bspLeafs)
{
BspLeaf **ssecIter = sec->bspLeafs;
do
{
BspLeaf *bspLeaf = *ssecIter;
uint n = 0;
biassurface_t **newList = (biassurface_t **) Z_Calloc(sec->planeCount() * sizeof(biassurface_t *), PU_MAP, 0);
// Copy the existing list?
if(bspLeaf->bsuf)
{
for(; n < sec->planeCount() - 1 /* exclude newly added */; ++n)
{
newList[n] = bspLeaf->bsuf[n];
}
Z_Free(bspLeaf->bsuf);
bspLeaf->bsuf = 0;
}
if(!ddMapSetup)
{
biassurface_t *bsuf = SB_CreateSurface();
bsuf->size = Rend_NumFanVerticesForBspLeaf(bspLeaf);
bsuf->illum = (vertexillum_t *) Z_Calloc(sizeof(vertexillum_t) * bsuf->size, PU_MAP, 0);
for(uint i = 0; i < bsuf->size; ++i)
{
SB_InitVertexIllum(&bsuf->illum[i]);
}
newList[n] = bsuf;
}
bspLeaf->bsuf = newList;
ssecIter++;
} while(*ssecIter);
}
#endif
return plane;
}
/**
* Permanently destroys the specified plane of the given sector.
* The sector's plane list is updated accordingly.
*
* @param id The sector, plane id to be destroyed.
* @param sec Ptr to sector for which a plane will be destroyed.
*/
void R_DestroyPlaneOfSector(uint id, Sector *sec)
{
if(!sec) return; // Do wha?
if(id > sec->planeCount())
Con_Error("P_DestroyPlaneOfSector: Plane id #%i is not valid for "
"sector #%u", id, (uint) GET_SECTOR_IDX(sec));
Plane *plane = sec->planes[id];
// If this plane is currently being watched, remove it.
R_RemoveTrackedPlane(GameMap_TrackedPlanes(theMap), plane);
// If this plane's surface is in the moving list, remove it.
theMap->scrollingSurfaces().remove(&plane->surface);
#ifdef __CLIENT__
// If this plane's surface is in the glowing list, remove it.
theMap->glowingSurfaces().remove(&plane->surface);
// If this plane's surface is in the decorated list, remove it.
theMap->decoratedSurfaces().remove(&plane->surface);
// Destroy the biassurfaces for this plane.
for(BspLeaf **bspLeafIter = sec->bspLeafs; *bspLeafIter; bspLeafIter++)
{
BspLeaf *bspLeaf = *bspLeafIter;
DENG2_ASSERT(bspLeaf->bsuf != 0);
SB_DestroySurface(bspLeaf->bsuf[id]);
if(id < sec->planeCount())
{
std::memmove(bspLeaf->bsuf + id, bspLeaf->bsuf + id + 1, sizeof(biassurface_t *));
}
}
#endif // __CLIENT__
// Destroy the specified plane.
sec->planes.removeOne(plane);
delete plane;
}
void GameMap_UpdateSkyFixForSector(GameMap *map, Sector *sec)
{
DENG_ASSERT(map);
if(!sec || 0 == sec->lineDefCount) return;
bool skyFloor = sec->SP_floorsurface.isSkyMasked();
bool skyCeil = sec->SP_ceilsurface.isSkyMasked();
if(!skyFloor && !skyCeil) return;
if(skyCeil)
{
// Adjust for the plane height.
if(sec->SP_ceilvisheight > map->skyFix[PLN_CEILING].height)
{
// Must raise the skyfix ceiling.
map->skyFix[PLN_CEILING].height = sec->SP_ceilvisheight;
}
// Check that all the mobjs in the sector fit in.
for(mobj_t *mo = sec->mobjList; mo; mo = mo->sNext)
{
float extent = mo->origin[VZ] + mo->height;
if(extent > map->skyFix[PLN_CEILING].height)
{
// Must raise the skyfix ceiling.
map->skyFix[PLN_CEILING].height = extent;
}
}
}
if(skyFloor)
{
// Adjust for the plane height.
if(sec->SP_floorvisheight < map->skyFix[PLN_FLOOR].height)
{
// Must lower the skyfix floor.
map->skyFix[PLN_FLOOR].height = sec->SP_floorvisheight;
}
}
// Update for middle textures on two sided linedefs which intersect the
// floor and/or ceiling of their front and/or back sectors.
if(sec->lineDefs && *sec->lineDefs)
{
LineDef **linePtr = sec->lineDefs;
do
{
LineDef *li = *linePtr;
// Must be twosided.
if(li->L_frontsidedef && li->L_backsidedef)
{
SideDef *si = li->L_frontsector == sec? li->L_frontsidedef : li->L_backsidedef;
if(si->SW_middlematerial)
{
if(skyCeil)
{
float top = sec->SP_ceilvisheight + si->SW_middlevisoffset[VY];
if(top > map->skyFix[PLN_CEILING].height)
{
// Must raise the skyfix ceiling.
map->skyFix[PLN_CEILING].height = top;
}
}
if(skyFloor)
{
float bottom = sec->SP_floorvisheight +
si->SW_middlevisoffset[VY] - si->SW_middlematerial->height();
if(bottom < map->skyFix[PLN_FLOOR].height)
{
// Must lower the skyfix floor.
map->skyFix[PLN_FLOOR].height = bottom;
}
}
}
}
linePtr++;
} while(*linePtr);
}
}
void GameMap_InitSkyFix(GameMap *map)
{
DENG_ASSERT(map);
map->skyFix[PLN_FLOOR].height = DDMAXFLOAT;
map->skyFix[PLN_CEILING].height = DDMINFLOAT;
// Update for sector plane heights and mobjs which intersect the ceiling.
for(uint i = 0; i < map->sectorCount(); ++i)
{
GameMap_UpdateSkyFixForSector(map, &map->sectors[i]);
}
}
/**
* @return Lineowner for this line for this vertex; otherwise @c 0.
*/
lineowner_t *R_GetVtxLineOwner(Vertex const *v, LineDef const *line)
{
if(v == line->L_v1)
return line->L_vo1;
if(v == line->L_v2)
return line->L_vo2;
return 0;
}
#undef R_SetupFog
DENG_EXTERN_C void R_SetupFog(float start, float end, float density, float *rgb)
{
Con_Execute(CMDS_DDAY, "fog on", true, false);
Con_Executef(CMDS_DDAY, true, "fog start %f", start);
Con_Executef(CMDS_DDAY, true, "fog end %f", end);
Con_Executef(CMDS_DDAY, true, "fog density %f", density);
Con_Executef(CMDS_DDAY, true, "fog color %.0f %.0f %.0f",
rgb[0] * 255, rgb[1] * 255, rgb[2] * 255);
}
#undef R_SetupFogDefaults
DENG_EXTERN_C void R_SetupFogDefaults()
{
// Go with the defaults.
Con_Execute(CMDS_DDAY,"fog off", true, false);
}
void R_OrderVertices(LineDef const *line, Sector const *sector, Vertex *verts[2])
{
byte edge = (sector == line->L_frontsector? 0:1);
verts[0] = line->L_v(edge);
verts[1] = line->L_v(edge^1);
}
boolean R_FindBottomTop2(SideDefSection section, int lineFlags,
Sector *frontSec, Sector *backSec, SideDef *frontDef, SideDef *backDef,
coord_t *low, coord_t *hi, float matOffset[2])
{
bool const unpegBottom = !!(lineFlags & DDLF_DONTPEGBOTTOM);
bool const unpegTop = !!(lineFlags & DDLF_DONTPEGTOP);
// Single sided?
if(!frontSec || !backSec || !backDef/*front side of a "window"*/)
{
*low = frontSec->SP_floorvisheight;
*hi = frontSec->SP_ceilvisheight;
if(matOffset)
{
Surface *suf = &frontDef->SW_middlesurface;
matOffset[0] = suf->visOffset[0];
matOffset[1] = suf->visOffset[1];
if(unpegBottom)
{
matOffset[1] -= *hi - *low;
}
}
}
else
{
boolean const stretchMiddle = !!(frontDef->flags & SDF_MIDDLE_STRETCH);
Plane *ffloor = frontSec->SP_plane(PLN_FLOOR);
Plane *fceil = frontSec->SP_plane(PLN_CEILING);
Plane *bfloor = backSec->SP_plane(PLN_FLOOR);
Plane *bceil = backSec->SP_plane(PLN_CEILING);
Surface *suf = &frontDef->SW_surface(section);
switch(section)
{
case SS_TOP:
// Can't go over front ceiling (would induce geometry flaws).
if(bceil->visHeight < ffloor->visHeight)
*low = ffloor->visHeight;
else
*low = bceil->visHeight;
*hi = fceil->visHeight;
if(matOffset)
{
matOffset[0] = suf->visOffset[0];
matOffset[1] = suf->visOffset[1];
if(!unpegTop)
{
// Align with normal middle texture.
matOffset[1] -= fceil->visHeight - bceil->visHeight;
}
}
break;
case SS_BOTTOM: {
bool const raiseToBackFloor = (fceil->surface.isSkyMasked() && bceil->surface.isSkyMasked() &&
fceil->visHeight < bceil->visHeight &&
bfloor->visHeight > fceil->visHeight);
coord_t t = bfloor->visHeight;
*low = ffloor->visHeight;
// Can't go over the back ceiling, would induce polygon flaws.
if(bfloor->visHeight > bceil->visHeight)
t = bceil->visHeight;
// Can't go over front ceiling, would induce polygon flaws.
// In the special case of a sky masked upper we must extend the bottom
// section up to the height of the back floor.
if(t > fceil->visHeight && !raiseToBackFloor)
t = fceil->visHeight;
*hi = t;
if(matOffset)
{
matOffset[0] = suf->visOffset[0];
matOffset[1] = suf->visOffset[1];
if(bfloor->visHeight > fceil->visHeight)
{
matOffset[1] -= (raiseToBackFloor? t : fceil->visHeight) - bfloor->visHeight;
}
if(unpegBottom)
{
// Align with normal middle texture.
matOffset[1] += (raiseToBackFloor? t : fceil->visHeight) - bfloor->visHeight;
}
}
break; }
case SS_MIDDLE:
*low = MAX_OF(bfloor->visHeight, ffloor->visHeight);
*hi = MIN_OF(bceil->visHeight, fceil->visHeight);
if(matOffset)
{
matOffset[0] = suf->visOffset[0];
matOffset[1] = 0;
}
if(suf->material && !stretchMiddle)
{
bool const clipBottom = !(!(devRendSkyMode || P_IsInVoid(viewPlayer)) && ffloor->surface.isSkyMasked() && bfloor->surface.isSkyMasked());
bool const clipTop = !(!(devRendSkyMode || P_IsInVoid(viewPlayer)) && fceil->surface.isSkyMasked() && bceil->surface.isSkyMasked());
coord_t const openBottom = *low;
coord_t const openTop = *hi;
int const matHeight = suf->material->height();
coord_t const matYOffset = suf->visOffset[VY];
if(openTop > openBottom)
{
if(unpegBottom)
{
*low += matYOffset;
*hi = *low + matHeight;
}
else
{
*hi += matYOffset;
*low = *hi - matHeight;
}
if(matOffset && *hi > openTop)
{
matOffset[1] = *hi - openTop;
}
// Clip it?
if(clipTop || clipBottom)
{
if(clipBottom && *low < openBottom)
*low = openBottom;
if(clipTop && *hi > openTop)
*hi = openTop;
}
if(matOffset && !clipTop)
{
matOffset[1] = 0;
}
}
}
break;
}
}
return /*is_visible=*/ *hi > *low;
}
boolean R_FindBottomTop(SideDefSection section, int lineFlags,
Sector *frontSec, Sector *backSec, SideDef *frontDef, SideDef *backDef,
coord_t *low, coord_t *hi)
{
return R_FindBottomTop2(section, lineFlags, frontSec, backSec, frontDef, backDef,
low, hi, 0/*offset not needed*/);
}
coord_t R_OpenRange(Sector const *frontSec, Sector const *backSec, coord_t *retBottom, coord_t *retTop)
{
DENG_ASSERT(frontSec);
coord_t top;
if(backSec && backSec->SP_ceilheight < frontSec->SP_ceilheight)
{
top = backSec->SP_ceilheight;
}
else
{
top = frontSec->SP_ceilheight;
}
coord_t bottom;
if(backSec && backSec->SP_floorheight > frontSec->SP_floorheight)
{
bottom = backSec->SP_floorheight;
}
else
{
bottom = frontSec->SP_floorheight;
}
if(retBottom) *retBottom = bottom;
if(retTop) *retTop = top;
return top - bottom;
}
coord_t R_VisOpenRange(Sector const *frontSec, Sector const *backSec, coord_t *retBottom, coord_t *retTop)
{
DENG_ASSERT(frontSec);
coord_t top;
if(backSec && backSec->SP_ceilvisheight < frontSec->SP_ceilvisheight)
{
top = backSec->SP_ceilvisheight;
}
else
{
top = frontSec->SP_ceilvisheight;
}
coord_t bottom;
if(backSec && backSec->SP_floorvisheight > frontSec->SP_floorvisheight)
{
bottom = backSec->SP_floorvisheight;
}
else
{
bottom = frontSec->SP_floorvisheight;
}
if(retBottom) *retBottom = bottom;
if(retTop) *retTop = top;
return top - bottom;
}
#ifdef __CLIENT__
boolean R_MiddleMaterialCoversOpening(int lineFlags, Sector *frontSec, Sector *backSec,
SideDef *frontDef, SideDef *backDef, boolean ignoreOpacity)
{
if(!frontSec || !frontDef) return false; // Never.
Material *material = frontDef->SW_middlematerial;
if(!material) return false;
// Ensure we have up to date info about the material.
MaterialSnapshot const &ms = material->prepare(Rend_MapSurfaceMaterialSpec());
if(ignoreOpacity || (ms.isOpaque() && !frontDef->SW_middleblendmode && frontDef->SW_middlergba[3] >= 1))
{
coord_t openRange, openBottom, openTop;
// Stretched middles always cover the opening.
if(frontDef->flags & SDF_MIDDLE_STRETCH) return true;
// Might the material cover the opening?
openRange = R_VisOpenRange(frontSec, backSec, &openBottom, &openTop);
if(ms.height() >= openRange)
{
// Possibly; check the placement.
coord_t bottom, top;
if(R_FindBottomTop(SS_MIDDLE, lineFlags, frontSec, backSec, frontDef, backDef,
&bottom, &top))
{
return (top >= openTop && bottom <= openBottom);
}
}
}
return false;
}
boolean R_MiddleMaterialCoversLineOpening(LineDef *line, int side, boolean ignoreOpacity)
{
DENG_ASSERT(line);
Sector *frontSec = line->L_sector(side);
Sector *backSec = line->L_sector(side ^ 1);
SideDef *frontDef = line->L_sidedef(side);
SideDef *backDef = line->L_sidedef(side ^ 1);
return R_MiddleMaterialCoversOpening(line->flags, frontSec, backSec, frontDef, backDef, ignoreOpacity);
}
LineDef *R_FindLineNeighbor(Sector const *sector, LineDef const *line,
lineowner_t const *own, boolean antiClockwise, binangle_t *diff)
{
lineowner_t *cown = own->link[!antiClockwise];
LineDef *other = cown->lineDef;
if(other == line)
return NULL;
if(diff) *diff += (antiClockwise? cown->angle : own->angle);
if(!other->L_backsidedef || other->L_frontsector != other->L_backsector)
{
if(sector) // Must one of the sectors match?
{
if(other->L_frontsector == sector ||
(other->L_backsidedef && other->L_backsector == sector))
return other;
}
else
{
return other;
}
}
// Not suitable, try the next.
return R_FindLineNeighbor(sector, line, cown, antiClockwise, diff);
}
LineDef *R_FindSolidLineNeighbor(Sector const *sector, LineDef const *line,
lineowner_t const *own, boolean antiClockwise, binangle_t *diff)
{
lineowner_t *cown = own->link[!antiClockwise];
LineDef *other = cown->lineDef;
int side;
if(other == line) return NULL;
if(diff) *diff += (antiClockwise? cown->angle : own->angle);
if(!((other->inFlags & LF_BSPWINDOW) && other->L_frontsector != sector))
{
if(!other->L_frontsidedef || !other->L_backsidedef)
return other;
if(!LINE_SELFREF(other) &&
(other->L_frontsector->SP_floorvisheight >= sector->SP_ceilvisheight ||
other->L_frontsector->SP_ceilvisheight <= sector->SP_floorvisheight ||
other->L_backsector->SP_floorvisheight >= sector->SP_ceilvisheight ||
other->L_backsector->SP_ceilvisheight <= sector->SP_floorvisheight ||
other->L_backsector->SP_ceilvisheight <= other->L_backsector->SP_floorvisheight))
return other;
// Both front and back MUST be open by this point.
// Check for mid texture which fills the gap between floor and ceiling.
// We should not give away the location of false walls (secrets).
side = (other->L_frontsector == sector? 0 : 1);
if(other->L_sidedef(side)->SW_middlematerial)
{
float oFCeil = other->L_frontsector->SP_ceilvisheight;
float oFFloor = other->L_frontsector->SP_floorvisheight;
float oBCeil = other->L_backsector->SP_ceilvisheight;
float oBFloor = other->L_backsector->SP_floorvisheight;
if((side == 0 &&
((oBCeil > sector->SP_floorvisheight &&
oBFloor <= sector->SP_floorvisheight) ||
(oBFloor < sector->SP_ceilvisheight &&
oBCeil >= sector->SP_ceilvisheight) ||
(oBFloor < sector->SP_ceilvisheight &&
oBCeil > sector->SP_floorvisheight))) ||
( /* side must be 1 */
((oFCeil > sector->SP_floorvisheight &&
oFFloor <= sector->SP_floorvisheight) ||
(oFFloor < sector->SP_ceilvisheight &&
oFCeil >= sector->SP_ceilvisheight) ||
(oFFloor < sector->SP_ceilvisheight &&
oFCeil > sector->SP_floorvisheight))) )
{
if(!R_MiddleMaterialCoversLineOpening(other, side, false))
return 0;
}
}
}
// Not suitable, try the next.
return R_FindSolidLineNeighbor(sector, line, cown, antiClockwise, diff);
}
LineDef *R_FindLineBackNeighbor(Sector const *sector, LineDef const *line,
lineowner_t const *own, boolean antiClockwise, binangle_t *diff)
{
lineowner_t *cown = own->link[!antiClockwise];
LineDef *other = cown->lineDef;
if(other == line) return 0;
if(diff) *diff += (antiClockwise? cown->angle : own->angle);
if(!other->L_backsidedef || other->L_frontsector != other->L_backsector ||
(other->inFlags & LF_BSPWINDOW))
{
if(!(other->L_frontsector == sector ||
(other->L_backsidedef && other->L_backsector == sector)))
return other;
}
// Not suitable, try the next.
return R_FindLineBackNeighbor(sector, line, cown, antiClockwise, diff);
}
LineDef *R_FindLineAlignNeighbor(Sector const *sec, LineDef const *line,
lineowner_t const *own, boolean antiClockwise, int alignment)
{
int const SEP = 10;
lineowner_t* cown = own->link[!antiClockwise];
LineDef* other = cown->lineDef;
binangle_t diff;
if(other == line)
return NULL;
if(!LINE_SELFREF(other))
{
diff = line->angle - other->angle;
if(alignment < 0)
diff -= BANG_180;
if(other->L_frontsector != sec)
diff -= BANG_180;
if(diff < SEP || diff > BANG_360 - SEP)
return other;
}
// Can't step over non-twosided lines.
if((!other->L_backsidedef || !other->L_frontsidedef))
return NULL;
// Not suitable, try the next.
return R_FindLineAlignNeighbor(sec, line, cown, antiClockwise, alignment);
}
#endif // __CLIENT__
static inline void initSurfaceMaterialOffset(Surface *suf)
{
DENG_ASSERT(suf);
suf->visOffset[VX] = suf->oldOffset[0][VX] = suf->oldOffset[1][VX] = suf->offset[VX];
suf->visOffset[VY] = suf->oldOffset[0][VY] = suf->oldOffset[1][VY] = suf->offset[VY];
}
/**
* Set intial values of various tracked and interpolated properties
* (lighting, smoothed planes etc).
*/