/**
* @param side Line side for which to determine covered opening status.
*
* @return @c true iff there is a "middle" material on @a side which
* completely covers the open range.
*
* @todo fixme: Should use the visual plane heights of sector clusters.
*/
static bool middleMaterialCoversOpening(LineSide const &side)
{
if(!side.hasSector()) return false; // Never.
if(!side.hasSections()) return false;
if(!side.middle().hasMaterial()) return false;
// Stretched middles always cover the opening.
if(side.isFlagged(SDF_MIDDLE_STRETCH))
return true;
// Ensure we have up to date info about the material.
MaterialSnapshot const &ms = side.middle().material().prepare(Rend_MapSurfaceMaterialSpec());
if(ms.isOpaque() && !side.middle().blendMode() && side.middle().opacity() >= 1)
{
if(side.leftHEdge()) // possibility of degenerate BSP leaf
{
coord_t openRange, openBottom, openTop;
openRange = visOpenRange(side, &openBottom, &openTop);
if(ms.height() >= openRange)
{
// Possibly; check the placement.
WallEdge edge(WallSpec::fromMapSide(side, LineSide::Middle),
*side.leftHEdge(), Line::From);
return (edge.isValid() && edge.top().z() > edge.bottom().z()
&& edge.top().z() >= openTop && edge.bottom().z() <= openBottom);
}
}
}
return false;
}
/// @todo fixme: Should use the visual plane heights of sector clusters.
static bool middleMaterialCoversOpening(LineSide const &side)
{
if(!side.hasSector()) return false; // Never.
if(!side.hasSections()) return false;
if(!side.middle().hasMaterial()) return false;
MaterialAnimator &matAnimator = side.middle().material().getAnimator(Rend_MapSurfaceMaterialSpec());
// Ensure we have up to date info about the material.
matAnimator.prepare();
// Might the material cover the opening?
if(matAnimator.isOpaque() && !side.middle().blendMode() && side.middle().opacity() >= 1)
{
// Stretched middles always cover the opening.
if(side.isFlagged(SDF_MIDDLE_STRETCH))
return true;
Sector const &frontSec = side.sector();
Sector const *backSec = side.back().sectorPtr();
// Determine the opening between the visual sector planes at this edge.
coord_t openBottom;
if(backSec && backSec->floor().heightSmoothed() > frontSec.floor().heightSmoothed())
{
openBottom = backSec->floor().heightSmoothed();
}
else
{
openBottom = frontSec.floor().heightSmoothed();
}
coord_t openTop;
if(backSec && backSec->ceiling().heightSmoothed() < frontSec.ceiling().heightSmoothed())
{
openTop = backSec->ceiling().heightSmoothed();
}
else
{
openTop = frontSec.ceiling().heightSmoothed();
}
if(matAnimator.dimensions().y >= openTop - openBottom)
{
// Possibly; check the placement.
if(side.leftHEdge()) // possibility of degenerate BSP leaf
{
WallEdge edge(WallSpec::fromMapSide(side, LineSide::Middle),
*side.leftHEdge(), Line::From);
return (edge.isValid() && edge.top().z() > edge.bottom().z()
&& edge.top().z() >= openTop && edge.bottom().z() <= openBottom);
}
}
}
return false;
}
/// @todo fixme: Should use the visual plane heights of sector clusters.
bool R_SideBackClosed(LineSide const &side, bool ignoreOpacity)
{
if(!side.hasSections()) return false;
if(!side.hasSector()) return false;
if(side.line().isSelfReferencing()) return false; // Never.
if(side.considerOneSided()) return true;
Sector const &frontSec = side.sector();
Sector const &backSec = side.back().sector();
if(backSec.floor().heightSmoothed() >= backSec.ceiling().heightSmoothed()) return true;
if(backSec.ceiling().heightSmoothed() <= frontSec.floor().heightSmoothed()) return true;
if(backSec.floor().heightSmoothed() >= frontSec.ceiling().heightSmoothed()) return true;
// Perhaps a middle material completely covers the opening?
if(side.middle().hasMaterial())
{
MaterialAnimator &matAnimator = side.middle().material().getAnimator(Rend_MapSurfaceMaterialSpec());
// Ensure we have up to date info about the material.
matAnimator.prepare();
if(ignoreOpacity || (matAnimator.isOpaque() && !side.middle().blendMode() && side.middle().opacity() >= 1))
{
// Stretched middles always cover the opening.
if(side.isFlagged(SDF_MIDDLE_STRETCH))
return true;
if(side.leftHEdge()) // possibility of degenerate BSP leaf
{
coord_t openRange, openBottom, openTop;
openRange = visOpenRange(side, &openBottom, &openTop);
if(matAnimator.dimensions().y >= openRange)
{
// Possibly; check the placement.
WallEdge edge(WallSpec::fromMapSide(side, LineSide::Middle),
*side.leftHEdge(), Line::From);
return (edge.isValid() && edge.top().z() > edge.bottom().z()
&& edge.top().z() >= openTop && edge.bottom().z() <= openBottom);
}
}
}
}
return false;
}
/**
* Find the neighbor surface for the edge which we will use to calculate the
* "blend" properties (e.g., smoothed edge normal).
*
* @todo: Use the half-edge rings instead of LineOwners.
*/
Surface *findBlendNeighbor(binangle_t &diff)
{
diff = 0;
// Are we not blending?
if(spec.flags.testFlag(WallSpec::NoEdgeNormalSmoothing))
return nullptr;
LineSide const &lineSide = lineSideSegment().lineSide();
// Polyobj lines have no owner rings.
if(lineSide.line().definesPolyobj())
return nullptr;
ClockDirection const direction = (edge? Anticlockwise : Clockwise);
LineOwner const &farVertOwner = *lineSide.line().vertexOwner(lineSide.sideId() ^ edge);
Line *neighbor;
if(R_SideBackClosed(lineSide))
{
neighbor = R_FindSolidLineNeighbor(lineSide.line(), farVertOwner, direction,
lineSide.sectorPtr(), &diff);
}
else
{
neighbor = R_FindLineNeighbor(lineSide.line(), farVertOwner, direction,
lineSide.sectorPtr(), &diff);
}
// No suitable line neighbor?
if(!neighbor) return nullptr;
// Choose the correct side of the neighbor (determined by which vertex is shared).
LineSide *otherSide;
if(&neighbor->vertex(edge ^ 1) == &lineSide.vertex(edge))
otherSide = &neighbor->front();
else
otherSide = &neighbor->back();
// We can only blend if the neighbor has a surface.
if(!otherSide->hasSections()) return nullptr;
/// @todo Do not assume the neighbor is the middle section of @var otherSide.
return &otherSide->middle();
}
