Web

Web # 18
Robotic name	Web
Default color	7
Default param	none
ID char	0 (#18)
ID anim. chars	Thin lines (#128-#143)
Attributes	Floor Break when bombed

Web (ID 18, Web) is a built-in terrain. It is generic floor type with the default color 7, uses the configured thin lines ID chars (128-143) to determine its display character based on its surroundings. It is similar to Thick Web, which uses thick lines instead.

If the board option Fire burns fakes is enabled, Fire can spread onto any Web.

A Spider can be configured to move exclusively on different Web types.

Behavior

The display character of a Web is derived from the IDs in the four positions immediately surrounding it:

offset = 0

if board edge or anything but Space to the north:
  offset += 1

if board edge or anything but Space to the south:
  offset += 2

if board edge or anything but Space to the east:
  offset += 4

if board edge or anything but Space to the west:
  offset += 8

char = offset + thin lines ID chars animation start (128)

ZZT connection

In Super ZZT, the equivalent element to Web is zzt:Web.