Difference between revisions of "Teleportation"

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m ("chance to" = opportunity; "chance of" = probability)
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There are three teleport-related properties: [[teleportitis]], which teleports you horizontally at random; [[teleport control]], which lets you choose where teleports land; and teleport at will, which lets you trigger teleportitis to happen whenever you want at a power cost.
 
There are three teleport-related properties: [[teleportitis]], which teleports you horizontally at random; [[teleport control]], which lets you choose where teleports land; and teleport at will, which lets you trigger teleportitis to happen whenever you want at a power cost.
  
Horizontal teleportation almost always move you away from your current position, but there is a very small chance of landing on the exact same square.<ref>http://groups.google.com/group/rec.games.roguelike.nethack/msg/fd6ff9fff482a512</ref>
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Horizontal teleportation almost always moves you away from your current position, but there is a very small chance of landing on the exact same square.<ref>http://groups.google.com/group/rec.games.roguelike.nethack/msg/fd6ff9fff482a512</ref>
  
 
==Valid destinations==
 
==Valid destinations==
  
You cannot teleport to a square that is already occupied by a monster,<ref>{{sourcecode|teleport.c|57}}</ref> or to one that is considered unsafe for you to occupy.<ref>{{function|teleport.c|teleok}}</ref> If you try to do so deliberately, with teleport control, you will receive the message '''Sorry...''', and will be teleported randomly instead.<ref>{{sourcecode|teleport.c|444}}</ref>
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You cannot teleport to a square that is already occupied by a monster{{refsrc|src/teleport.c|48-L61|nethack=3.6.6}}, or to one that is considered unsafe for you to occupy.{{refsrc|src/teleport.c|262|nethack=3.6.6}} If you try to do so deliberately with teleport control, you will receive the message "'''Sorry...'''" and be teleported randomly instead.{{refsrc|src/teleport.c|533|nethack=3.6.6}}
  
 
In particular:
 
In particular:
  
* You cannot teleport into [[water]] unless you're polymorphed into a [[flying]], [[swimming]] or [[amphibious]] monster, or have [[water walking]], [[magical breathing]] or [[intrinsic]] [[levitation]].<ref>{{sourcecode|teleport.c|61}}; for some reason, the code checks for <code>HLevitation</code>, which means intrinsic levitation only, rather than <code>Levitation</code>, which means levitation in general.</ref> Due to what may be a [[bug]], extrinsic levitation (from the [[levitation boots|boots]] or [[ring of levitation]]) does ''not'' count.
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* You cannot teleport into [[water]] unless you are [[levitating]], [[flying]], [[water walking]], [[magical breathing]], or polymorphed into a [[swimming]] or [[amphibious]] monster.{{refsrc|src/teleport.c|67|nethack=3.6.6|comment=Note: the Amphibious macro covers magical breathing.}}
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* You also cannot teleport onto [[lava]], unless you are levitating, flying, are fire resistant and wearing fireproof [[water walking boots]], or are polymorphed into a monster such as a [[salamander]] or [[fire elemental]] that likes lava. {{refsrc|src/teleport.c|85|nethack=3.6.6}}
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* If you're polymorphed into a [[sea monster]], you only have a 1 in 13 chance of successfully teleporting onto dry land.{{refsrc|src/teleport.c|77|nethack=3.6.6}}
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* You cannot teleport onto a [[trap]], unless there are no other valid locations to teleport to. (The game will try 200 times to pick a safe location for you before considering trapped locations.{{refsrc|src/teleport.c|424|nethack=3.6.6}}) In particular, [[magic portal]]s are considered traps, so you cannot teleport directly onto your [[quest]] portal.
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* Only [[phasing]] monsters can teleport into [[solid rock]], into [[wall]]s, [[tree]]s, [[iron bars]] or a raised [[drawbridge]], or into a [[secret door]] or a [[secret corridor]]. {{refsrc|src/teleport.c|93|nethack=3.6.6}} Teleporting onto a closed [[door]] is only possible for phasing or [[amorphous]] monsters,{{refsrc|src/teleport.c|95|nethack=3.6.6}} and only [[giant]]s and phasing monsters can teleport onto [[boulder]]s.{{refsrc|src/teleport.c||nethack=3.6.6}}
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* You cannot teleport into the [[Wizard's Tower]] from outside it, nor outside it from the inside.{{refsrc|src/teleport.c|227|nethack/3.6.6}}
  
* You also cannot teleport onto [[lava]], unless you have intrinsic levitation.<ref>{{sourcecode|teleport.c|69}}</ref> Again, extrinsic levitation isn't enough, and neither is being polymorphed into a [[fire elemental]] or a [[salamander]] (even though both can be generated in lava).
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There is also some code that could prevent the player from teleporting in and out of force fields{{refsrc|src/teleport.c|277|nethack=3.6.6}}, but those [[deferred feature|do not exist]] in vanilla ''NetHack''.
  
* If you're polymorphed into a [[sea monster]], you only have a 1 in 13 chance of successfully teleporting onto dry land.<ref>{{sourcecode|teleport.c|67}}</ref>
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== Messages ==
 
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{{message|A mysterious force prevents you from teleporting!|You are on a [[non-teleport level]].}}
* You cannot teleport onto a [[trap]], unless there are no other valid locations to teleport to. (The game will try 200 times to pick a safe location for you before considering trapped locations<ref>{{function|teleport.c|safe_teleds}}</ref>.) In particular, [[magic portal]]s are considered traps, so you cannot teleport directly onto your [[quest]] portal.
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{{message|You feel disoriented for a moment.|You would have teleported, but it failed because you are carrying the [[Amulet of Yendor]].}}
 
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{{message|Sorry...|You chose an unteleportable destination with teleport control.}}
* Only [[phasing]] monsters can teleport into [[solid rock]], into [[wall]]s, [[tree]]s, [[iron bars]] or a raised [[drawbridge]], or into a [[secret door]] or a [[secret corridor]].<ref>{{sourcecode|teleport.c|75}}; {{sourcecode|teleport.c|77}}; {{sourcecode|rm.h|32}} to line 84</ref> Teleporting onto a closed [[door]] is only possible for phasing or [[amorphous]] monsters,<ref>{{sourcecode|teleport.c|81}}</ref> and only [[giant]]s and phasing monsters can teleport onto [[boulder]]s.<ref>{{sourcecode|teleport.c|83}}</ref>
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{{upcoming|NetHack 3.7.0|The following two messages are added.}}
 
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{{message|You materialize in a different location!|You teleported to a different space on your level.}}
* You cannot teleport into the [[Wizard's Tower]] from outside it, nor outside it from the inside.<ref>{{function|teleport.c|tele_jump_ok}}</ref>
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{{message|You materialize in the same location!|You teleported to your current space.}}
 
 
There is also some code that could prevent the player from teleporting in and out of force fields,<ref>{{sourcecode|teleport.c|225}}, {{function|region.c|in_out_region}}</ref> but those [[deferred feature|do not exist]] in vanilla NetHack 3.4.3.
 
  
 
==See also==
 
==See also==

Latest revision as of 03:20, 24 May 2021

Teleportation provides a quick escape to a different (often random) location. Some escape items can teleport you away from monsters. Some monsters can also teleport themselves to flee from you.

Teleportation comes from:

There are three teleport-related properties: teleportitis, which teleports you horizontally at random; teleport control, which lets you choose where teleports land; and teleport at will, which lets you trigger teleportitis to happen whenever you want at a power cost.

Horizontal teleportation almost always moves you away from your current position, but there is a very small chance of landing on the exact same square.[1]

Valid destinations

You cannot teleport to a square that is already occupied by a monster[2], or to one that is considered unsafe for you to occupy.[3] If you try to do so deliberately with teleport control, you will receive the message "Sorry..." and be teleported randomly instead.[4]

In particular:

There is also some code that could prevent the player from teleporting in and out of force fields[13], but those do not exist in vanilla NetHack.

Messages

A mysterious force prevents you from teleporting!
You are on a non-teleport level.
You feel disoriented for a moment.
You would have teleported, but it failed because you are carrying the Amulet of Yendor.
Sorry...
You chose an unteleportable destination with teleport control.

The following information pertains to an upcoming version (NetHack 3.7.0). If this version is now released, please verify that it is still accurate, then update the page to incorporate this information.

The following two messages are added.
You materialize in a different location!
You teleported to a different space on your level.
You materialize in the same location!
You teleported to your current space.

See also

References

This page may need to be updated for the current version of NetHack.

It may contain text specific to NetHack 3.4.3. Information on this page may be out of date.

Editors: After reviewing this page and making necessary edits, please change the {{nethack-343}} tag to the current version's tag or {{noversion}} as appropriate.