//
// R_FindPlane
//
// killough 2/28/98: Add offsets
//
visplane_t *R_FindPlane (plane_t secplane, int picnum, int lightlevel,
fixed_t xoffs, fixed_t yoffs,
fixed_t xscale, fixed_t yscale, angle_t angle)
{
visplane_t *check;
unsigned hash; // killough
if (picnum == skyflatnum || picnum & PL_SKYFLAT) // killough 10/98
lightlevel = 0; // most skies map together
// New visplane algorithm uses hash table -- killough
hash = visplane_hash (picnum, lightlevel, secplane);
for (check = visplanes[hash]; check; check = check->next) // killough
if (P_IdenticalPlanes(&secplane, &check->secplane) &&
picnum == check->picnum &&
lightlevel == check->lightlevel &&
xoffs == check->xoffs && // killough 2/28/98: Add offset checks
yoffs == check->yoffs &&
basecolormap == check->colormap && // [RH] Add colormap check
xscale == check->xscale &&
yscale == check->yscale &&
angle == check->angle
)
return check;
check = new_visplane (hash); // killough
memcpy(&check->secplane, &secplane, sizeof(secplane));
check->picnum = picnum;
check->lightlevel = lightlevel;
check->xoffs = xoffs; // killough 2/28/98: Save offsets
check->yoffs = yoffs;
check->xscale = xscale;
check->yscale = yscale;
check->angle = angle;
check->colormap = basecolormap; // [RH] Save colormap
check->minx = viewwidth; // Was SCREENWIDTH -- killough 11/98
check->maxx = -1;
memset (check->top, 0xff, sizeof(*check->top) * screen->width);
return check;
}
visplane_t *R_CheckPlane (visplane_t *pl, int start, int stop)
{
int intrl, intrh;
int unionl, unionh;
int x;
assert (start >= 0 && start < viewwidth);
assert (stop > start && stop <= viewwidth);
if (start < pl->left)
{
intrl = pl->left;
unionl = start;
}
else
{
unionl = pl->left;
intrl = start;
}
if (stop > pl->right)
{
intrh = pl->right;
unionh = stop;
}
else
{
unionh = pl->right;
intrh = stop;
}
for (x = intrl; x < intrh && pl->top[x] == 0x7fff; x++)
;
if (x >= intrh)
{
// use the same visplane
pl->left = unionl;
pl->right = unionh;
}
else
{
// make a new visplane
unsigned hash;
if (pl->portal != NULL && !(pl->portal->mFlags & PORTSF_INSKYBOX) && viewactive)
{
hash = MAXVISPLANES;
}
else
{
hash = visplane_hash (pl->picnum.GetIndex(), pl->lightlevel, pl->height);
}
visplane_t *new_pl = new_visplane (hash);
new_pl->height = pl->height;
new_pl->picnum = pl->picnum;
new_pl->lightlevel = pl->lightlevel;
new_pl->xform = pl->xform;
new_pl->colormap = pl->colormap;
new_pl->portal = pl->portal;
new_pl->extralight = pl->extralight;
new_pl->visibility = pl->visibility;
new_pl->viewpos = pl->viewpos;
new_pl->viewangle = pl->viewangle;
new_pl->sky = pl->sky;
new_pl->Alpha = pl->Alpha;
new_pl->Additive = pl->Additive;
new_pl->CurrentPortalUniq = pl->CurrentPortalUniq;
new_pl->MirrorFlags = pl->MirrorFlags;
new_pl->CurrentSkybox = pl->CurrentSkybox;
pl = new_pl;
pl->left = start;
pl->right = stop;
fillshort (pl->top, viewwidth, 0x7fff);
}
return pl;
}
visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightlevel, double Alpha, bool additive,
const FTransform &xxform,
int sky, FSectorPortal *portal)
{
secplane_t plane;
visplane_t *check;
unsigned hash; // killough
bool isskybox;
const FTransform *xform = &xxform;
fixed_t alpha = FLOAT2FIXED(Alpha);
//angle_t angle = (xform.Angle + xform.baseAngle).BAMs();
FTransform nulltransform;
if (picnum == skyflatnum) // killough 10/98
{ // most skies map together
lightlevel = 0;
xform = &nulltransform;
nulltransform.xOffs = nulltransform.yOffs = nulltransform.baseyOffs = 0;
nulltransform.xScale = nulltransform.yScale = 1;
nulltransform.Angle = nulltransform.baseAngle = 0.0;
additive = false;
// [RH] Map floor skies and ceiling skies to separate visplanes. This isn't
// always necessary, but it is needed if a floor and ceiling sky are in the
// same column but separated by a wall. If they both try to reside in the
// same visplane, then only the floor sky will be drawn.
plane.set(0., 0., height.fC(), 0.);
isskybox = portal != NULL && !(portal->mFlags & PORTSF_INSKYBOX);
}
else if (portal != NULL && !(portal->mFlags & PORTSF_INSKYBOX))
{
plane = height;
isskybox = true;
}
else
{
plane = height;
isskybox = false;
// kg3D - hack, store alpha in sky
// i know there is ->alpha, but this also allows to identify fake plane
// and ->alpha is for stacked sectors
if (fake3D & (FAKE3D_FAKEFLOOR|FAKE3D_FAKECEILING)) sky = 0x80000000 | fakeAlpha;
else sky = 0; // not skyflatnum so it can't be a sky
portal = NULL;
alpha = OPAQUE;
}
// New visplane algorithm uses hash table -- killough
hash = isskybox ? MAXVISPLANES : visplane_hash (picnum.GetIndex(), lightlevel, height);
for (check = visplanes[hash]; check; check = check->next) // killough
{
if (isskybox)
{
if (portal == check->portal && plane == check->height)
{
if (portal->mType != PORTS_SKYVIEWPOINT)
{ // This skybox is really a stacked sector, so we need to
// check even more.
if (check->extralight == stacked_extralight &&
check->visibility == stacked_visibility &&
check->viewpos == stacked_viewpos &&
(
// headache inducing logic... :(
(portal->mType != PORTS_STACKEDSECTORTHING) ||
(
check->Alpha == alpha &&
check->Additive == additive &&
(alpha == 0 || // if alpha is > 0 everything needs to be checked
(plane == check->height &&
picnum == check->picnum &&
lightlevel == check->lightlevel &&
basecolormap == check->colormap && // [RH] Add more checks
*xform == check->xform
)
) &&
check->viewangle == stacked_angle
)
)
)
{
return check;
}
}
else
{
return check;
}
}
}
else
if (plane == check->height &&
picnum == check->picnum &&
lightlevel == check->lightlevel &&
basecolormap == check->colormap && // [RH] Add more checks
*xform == check->xform &&
sky == check->sky &&
CurrentPortalUniq == check->CurrentPortalUniq &&
MirrorFlags == check->MirrorFlags &&
CurrentSkybox == check->CurrentSkybox &&
ViewPos == check->viewpos
)
{
return check;
}
}
check = new_visplane (hash); // killough
check->height = plane;
check->picnum = picnum;
check->lightlevel = lightlevel;
check->xform = *xform;
check->colormap = basecolormap; // [RH] Save colormap
check->sky = sky;
check->portal = portal;
check->left = viewwidth; // Was SCREENWIDTH -- killough 11/98
check->right = 0;
check->extralight = stacked_extralight;
check->visibility = stacked_visibility;
check->viewpos = stacked_viewpos;
check->viewangle = stacked_angle;
check->Alpha = alpha;
check->Additive = additive;
check->CurrentPortalUniq = CurrentPortalUniq;
check->MirrorFlags = MirrorFlags;
check->CurrentSkybox = CurrentSkybox;
fillshort (check->top, viewwidth, 0x7fff);
return check;
}
//
// R_CheckPlane
//
visplane_t*
R_CheckPlane
( visplane_t* pl,
int start,
int stop )
{
int intrl;
int intrh;
int unionl;
int unionh;
int x;
if (start < pl->minx)
{
intrl = pl->minx;
unionl = start;
}
else
{
unionl = pl->minx;
intrl = start;
}
if (stop > pl->maxx)
{
intrh = pl->maxx;
unionh = stop;
}
else
{
unionh = pl->maxx;
intrh = stop;
}
for (x=intrl ; x <= intrh && pl->top[x] == 0xffffffffu; x++)
;
if (x > intrh)
{
// use the same visplane
pl->minx = unionl;
pl->maxx = unionh;
}
else
{
// make a new visplane
unsigned hash = visplane_hash (pl->picnum, pl->lightlevel, pl->secplane);
visplane_t *new_pl = new_visplane (hash);
new_pl->secplane = pl->secplane;
new_pl->picnum = pl->picnum;
new_pl->lightlevel = pl->lightlevel;
new_pl->xoffs = pl->xoffs; // killough 2/28/98
new_pl->yoffs = pl->yoffs;
new_pl->xscale = pl->xscale;
new_pl->yscale = pl->yscale;
new_pl->angle = pl->angle;
new_pl->colormap = pl->colormap; // [RH] Copy colormap
pl = new_pl;
pl->minx = start;
pl->maxx = stop;
memset (pl->top, 0xff, sizeof(*pl->top) * screen->width);
}
return pl;
}
