Door: Difference between revisions

[[Human]] technology for doors has progressed over the past centuries. While most doors in the past have been based on a hinge system, the doors seen on Earth and equally-developed off-world [[Human colonies|colonies]] are almost exclusively sliding (except for the antiquated doors in [[Crow's Nest]]),<ref name="crows">'''[[Halo 3]]''', campaign level, ''[[Crow's Nest]]''</ref> either opened by proximity or a switch located on the door itself. Like most human technology applied to everything from roads to spacefaring military vessels, the design is simple and geometric (with some discrepancies) with straight lines and angles, and involves blacks, grays, and browns. Most doors have a light on them that is either green to indicate that it is open or can be opened, or red to indicate that it is locked.<ref name="poa">'''Halo: Combat Evolved''', campaign level, ''[[The Pillar of Autumn (Halo: Combat Evolved level)|The Pillar of Autumn]]''</ref><ref>'''Halo 2''', campaign level, ''[[Cairo Station]]''</ref><ref>'''Halo 3''', campaign level, ''[[The Storm]]''</ref> While human doors usually consist of one or two sliding segments, there are some exceptions, such as the multi-segmented doors in some of [[Reach]]'s industrial facilities.<ref>'''[[Halo: Reach]]''', campaign level ''[[Tip of the Spear]]''</ref><ref>'''Halo: Reach''', campaign level ''[[The Pillar of Autumn (Halo: Reach level)|The Pillar of Autumn]]''</ref> Reinforced [[blast door]]s are a common sight in [[military base]]s and starships,<ref name="crows"/><ref name="poa"/> but are also used in cities, such as [[New Mombasa]], to close off certain sections in emergencies.<ref>'''[[Halo 3: ODST]]''', campaign level ''[[Mombasa Streets]]''</ref>

While the [[Flood]] do not have what we consider conventional architecture, they build their structures out of biomass they have consumed, adding to the disturbing overall impression of [[Flood hive|their hives]] being living things unto themselves. Flood doors, called [[Porta]]s, are built from biomass of infected hosts, and resemble valves like those in the heart. They open based on proximity. While the sections of the door itself retract, the circular frame of the door contracts at the same time.<ref name="Cortana"/><ref>'''Halo 3''', campaign level, ''[[Isolation]]''</ref>