Scroll_Floor

line version:
223:Scroll_Floor (tag, scrollbits, type, x-move, y-move)

script version:
223:Scroll_Floor (tag, x-move, y-move, type)

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

• tag: tag of affected sector
• scrollbits: how the scrolling speed is determined (see below)
• type: set to 0 to scroll the floor texture. A setting of 1 pushes objects along the floor without scrolling the texture. 2 does both. When using it in a script, definitions exist for the type field to allow easier readability.

• SCROLL — Scrolls the floor
• CARRY — Moves objects without scrolling
• SCROLL_AND_CARRY — Does both

• 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. (Only when placed on a line)

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

Scroll_Floor can also only scroll the flat, only carry objects, or scroll and carry objects depending on what the type argument is set to. 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.