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577 bytes added, 22:17, 6 November 2011
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The text file also mentions that there is a bug in the nodebuilder that causes columns to be drawn out of order. The bug described is in fact the [[slime trail]] glitch, which is more a consequence of lack of precision than an actual error in the algorithms.
 
==Trivia==
* Disabled code is present to prevent segment splits on lines comprising a sliding door. Two special linedef flags were to be used to identify them. This code is disabled since sliding doors were never fully implemented in the game engine.
* Comments indicate the node builder expects all vertices to be placed at coordinates that are multiples of 8.
* Since sectors are built from linedefs with identical sectordef properties, identical sectors are always merged. To prevent this from happening, Id mappers used dummy sector tags to create artificial differences.
==External links==
* {{idgames|Source code|id=157}}
[[Category:Node builders]]
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