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| == Overview == | | == Overview == |
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| Portals in a pair act as a direct link between one another. Anything that goes into one portal comes instantly out the other. Objects going at high speed into a portal (such as falling into one from great height) will maintain their speed when coming out of the other, giving the player the ability to launch themselves or other objects through the air. Portals are also capable of continuing any sort of beam, specifically the [[Excursion Funnel]]s, [[Thermal Discouragement Beam]]s, and [[Hard Light Bridge]]s. If only one portal in a pair exists at the moment, the existing portal is an oval completely filled in with color. When attempting to enter an unpaired portal, it will act as a solid wall. When both portals in a pair exist, they will appear to be like windows. When looking through one portal, you can see directly out the other. When a portal is linked, you can identify which portal it is by looking at its colored border.
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| Once the player obtains the Portal Device, they can create a portal on a surface by aiming at the spot they want to put the portal and pressing the primary or secondary fire key. If the player has only acquired the Single Portal Device, both fire keys produce the primary portal color. If they have acquired the Dual Portal Device, the primary fire key produces the primary color and the secondary fire key produces the secondary color. Portals cannot be placed on surfaces that are not made of the appropriate material (white walls usually indicate this material), moving, not flat, or not large enough for a portal to fit onto it. Portals also cannot be placed while looking through currently existing portals.
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| In ''[[Portal]]'' and the single-player campaign of ''[[Portal 2]]'', protagonist and test subject [[Chell]] can create blue (primary) and orange (secondary) portals with her version of the Dual Portal Gun. In ''Portal 2''<nowiki>'</nowiki>s [[co-op]] campaign, each robot test subject possesses individual portal colors in order to differentiate them; [[Atlas]] creates cyan (primary) and purple (secondary) portals, whereas [[P-body]] creates yellow (primary) and red (secondary) portals.
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| === Pre-release designs ===
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| The portals have had several changes in design before the final release of ''Portal'' in October 10, 2007, as evident in some trailers and screenshots.<ref>[http://www.youtube.com/watch?v=TluRVBhmf8w portal orientation video 1] on YouTube.com</ref> Even Earlier development screenshots from ''Portal'' revealed that the original colors for the portals were light blue (primary-fire) and purple (secondary-fire), with the portals more resembling like rifts ripped into a dimension than the simpler oval designs in the current series. Later, the purple color was replaced with red, akin to [[P-Body]]'s secondary-fire in ''Portal 2''. At some point, the developers decided to maintain the blue and orange color schemes previously used as portals in ''[[Narbacular Drop]]''.
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| == Gameplay bugs ==
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| * '''Portal boosting''': A player is able to boost their momentum when traveling through two portals placed on the floor by using their primary or secondary fire key as they exit the primary or secondary portal, respectively. This is caused by the portals ''pushing'' the player away from a portal if the portal is re-placed somewhere else (or in this case, in the same place).
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| == Gallery ==
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| === Portal colors ===
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| {{Gallery
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| |lines = 1
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| |height = 178|width=200
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| |title = [[Chell]]'s portals
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| |File:Chell_lmb_portal.png|alt1=C|Primary-fire portal
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| |File:Chell_rmb_portal.png|alt2=C|Secondary-fire portal
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| |File:Chell_both_portal.png|alt3=C|Both portals
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| }}
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| {{Gallery
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| |lines = 1
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| |height = 125
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| |width = 200
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| |title = [[Atlas]]' portals
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| |File:Atlas_lmb_portal.png|alt1=A|Primary-fire portal
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| |File:Atlas_rmb_portal.png|alt2=A|Secondary-fire portal
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| |File:Atlas_both_portal.png|alt3=A|Both portals
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| }} | | }} |
| {{Gallery | | {{Gallery |
