Scroll_Ceiling

line version:
224:Scroll_Ceiling (tag, scrollbits, unused, x-move, y-move)

script version:
224:Scroll_Ceiling (tag, x-move, y-move, unused)

• tag: tag of affected sector
• scrollbits: how the scrolling speed is determined (see below)
• unused: does nothing, contrary to Scroll_Floor.
• x-move/y-move: how quickly and in what directions to scroll.

scrollbits: Selects the type of scroller and how the speed and angle is determined.

• bit 0(1): Displacement scroller
• bit 1(2): Accelerative scroller
• bit 2(4): Use this linedef to get dx and dy

This special takes 5 arguments when placed on a line, but 4 arguments when used in a script.

x-move and y-move are only used if scrollbits does not indicate to use the linedef to determine the scroll rate. When placed on a line, 128 is subtracted from these values to determine the actual direction and rate of scroll. (So 128 would be no scroll.) When used in a script, positive values move north/east, while negative values move south/west.

NOTE: When using Doom Builder 2 the scripting popup help will show the line version instead of the script version. Do not follow it, use the script version.

Examples

The following results in a ceiling (with the tag of 14) that quickly scrolls to the north.

script 1 OPEN
{
   scroll_ceiling (14, 0, 150, 0);
}

Conversions from linedef types

The following Doom map format types can be converted as Scroll_Ceiling:

Type	Conversion	Trigger
Boom 214:Accel Tagged Ceiling w.r.t. 1st Side's Sector	Scroll_Ceiling (tag, 6, 0, 0, 0)
Boom 245:Scroll Tagged Ceiling w.r.t. 1st Side's Sector	Scroll_Ceiling (tag, 5, 0, 0, 0)
Boom 250:Scroll Tagged Ceiling	Scroll_Ceiling (tag, 4, 0, 0, 0)

External links

• Old reference for Scroll_Ceiling