bool P_AlignFlat (int linenum, int side, int fc)
{
line_t *line = lines + linenum;
sector_t *sec = side ? line->backsector : line->frontsector;
if (!sec)
return false;
fixed_t x = line->v1->x;
fixed_t y = line->v1->y;
angle_t angle = R_PointToAngle2 (x, y, line->v2->x, line->v2->y);
angle_t norm = (angle-ANGLE_90) >> ANGLETOFINESHIFT;
fixed_t dist = -DMulScale16 (finecosine[norm], x, finesine[norm], y);
if (side)
{
angle = angle + ANGLE_180;
dist = -dist;
}
sec->SetBase(fc, dist & ((1<<(FRACBITS+8))-1), 0-angle);
return true;
}
void EV_LightTurnOnPartway (int tag, fixed_t frac)
{
int i;
frac = clamp<fixed_t> (frac, 0, FRACUNIT);
// Search all sectors for ones with same tag as activating line
i = -1;
while ((i = P_FindSectorFromTag (tag, i)) >= 0)
{
sector_t *temp, *sector = sectors + i;
int j, bright = 0, min = sector->lightlevel;
for (j = 0; j < sector->linecount; ++j)
{
if ((temp = getNextSector (sector->lines[j], sector)) != NULL)
{
if (temp->lightlevel > bright)
{
bright = temp->lightlevel;
}
if (temp->lightlevel < min)
{
min = temp->lightlevel;
}
}
}
sector->SetLightLevel(DMulScale16 (frac, bright, FRACUNIT-frac, min));
}
}
