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- When scrolling rotated floors and ceilings, scroll as if the texture was unrotated. (That is,

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keep the scroll direction constant, no matter what the rotation.)

SVN r3669 (trunk)
This commit is contained in:
Randy Heit 2012-05-31 03:40:28 +00:00
parent 5b9b7a99ef
commit 2c3b57145a
1 changed files with 27 additions and 5 deletions
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32
src/p_spec.cpp
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@ -1461,9 +1461,29 @@ void P_SpawnSpecials (void)
// This is the main scrolling code
// killough 3/7/98
// [RH] Compensate for rotated sector textures by rotating the scrolling
// in the opposite direction.
static void RotationComp(const sector_t *sec, int which, fixed_t dx, fixed_t dy, fixed_t &tdx, fixed_t &tdy)
{
angle_t an = sec->GetAngle(which);
if (an == 0)
{
tdx = dx;
tdy = dy;
}
else
{
an = an >> ANGLETOFINESHIFT;
fixed_t ca = -finecosine[an];
fixed_t sa = -finesine[an];
tdx = DMulScale16(dx, ca, -dy, sa);
tdy = DMulScale16(dy, ca, dx, sa);
}
}
void DScroller::Tick ()
{
fixed_t dx = m_dx, dy = m_dy;
fixed_t dx = m_dx, dy = m_dy, tdx, tdy;
if (m_Control != -1)
{ // compute scroll amounts based on a sector's height changes
@ -1507,13 +1527,15 @@ void DScroller::Tick ()
break;
case sc_floor: // killough 3/7/98: Scroll floor texture
sectors[m_Affectee].AddXOffset(sector_t::floor, dx);
sectors[m_Affectee].AddYOffset(sector_t::floor, dy);
RotationComp(&sectors[m_Affectee], sector_t::floor, dx, dy, tdx, tdy);
sectors[m_Affectee].AddXOffset(sector_t::floor, tdx);
sectors[m_Affectee].AddYOffset(sector_t::floor, tdy);
break;
case sc_ceiling: // killough 3/7/98: Scroll ceiling texture
sectors[m_Affectee].AddXOffset(sector_t::ceiling, dx);
sectors[m_Affectee].AddYOffset(sector_t::ceiling, dy);
RotationComp(&sectors[m_Affectee], sector_t::ceiling, dx, dy, tdx, tdy);
sectors[m_Affectee].AddXOffset(sector_t::ceiling, tdx);
sectors[m_Affectee].AddYOffset(sector_t::ceiling, tdy);
break;
// [RH] Don't actually carry anything here. That happens later.