Func ladder
From Valve Developer Community
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Entity Description
Ladder. Players will be able to freely move along this brush, as if it was a ladder. If you are using a model prop for the visual representation of the ladder in the map, apply the toolsinvisibleladder material to the func_ladder brush.
This entity has no keyvalues, flags, inputs, or outputs
Note: This type of entity is only handled during vbsp compiling, and cannot be created or modified during runtime[edit]
Availability
This brush-based entity is available in: All Source games except Half-Life 2 Deathmatch.
In code it is represented by class CInfoLadder (http://doxygen.page.needed/class_c_info_ladder.html), defined in nav_ladder.cpp (http://doxygen.page.needed/nav__ladder_8cpp-source.html).
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