Linedef type 428

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Linedef type 428, Start Platform Movement, is a type of linedef executor which, when triggered, makes a tagged FOF move. It essentially does the same thing as linedef type 60, the difference being that the latter invariably executes on level load, whereas this linedef type can be activated by any desired executor trigger.


This linedef requires three control sectors, each of which must be connected to another with at least one linedef. The easiest way to set this up is to make three square sectors together in a row. One of the linedefs on the middle sector should contain the floor over floor linedef special that you want the floating platform to exhibit. This will be the FOF control sector. One of the linedefs in any of these three sectors (it doesn't matter which) should be set to have linedef type 428, and be tagged to the middle sector. The same sector should also have the trigger linedef.

The starting point of the platform is determined by the floor and ceiling height of the middle sector. The top and bottom of the platform's movement are determined by the floor and ceiling heights of the other two control sectors. The floating platform will constantly move, first so that it is equal to the floor and ceiling heights of the lower one of the outer control sectors, then so that it is equal to the floor and ceiling heights of the higher one of the outer control sectors, then the first one again, and so forth. The speed of the platform movement is determined by the length of the control linedef; one fracunit of length equals 0.25 fracunits per tic.

It is possible to add a delay before the platform begins to move, by setting the time in tics in the control linedef's front texture Y offset. If you want the platform to delay every time before changing direction, you can do so by setting the time in tics in the control linedef's front texture X offset.

If the Not Climbable flag is checked, the platform will begin moving upwards, rather than downwards.


Example WAD: ex_ld428_startplatformmovement.wad

  Linedef typesLinedef executors [view]

ContinuousEach TimeOnce • Ring Count (ContinuousOnce) • Character Ability (ContinuousEach TimeOnce) • Race Only – Once • CTF Red Team (ContinuousEach Time) • CTF Blue Team (ContinuousEach Time) • No More Enemies – Once • Number of Pushables (ContinuousOnce) • Condition Set Trigger (ContinuousOnce) • Unlockable (ContinuousOnce) • Trigger After X Calls (ContinuousEach Time) • Level Load

Set Tagged Sector's Floor Height/TextureSet Tagged Sector's Ceiling Height/TextureSet Tagged Sector's Light LevelChange Tagged Sectors' TagChange Front Sector's TagStart Adjustable Flickering LightStart Adjustable Pulsating LightStart Adjustable Blinking Light (unsynchronized)Start Adjustable Blinking Light (synchronized)Fade Light LevelStop Lighting EffectChange Plane Scroller Direction
Plane movement:
Move Tagged Sector's FloorMove Tagged Sector's CeilingMove Floor According to Front Texture OffsetsMove Ceiling According to Front Texture OffsetsStop Plane MovementStart Platform MovementCrush Ceiling OnceCrush Floor OnceCrush Ceiling and Floor Once
TeleporterChange Object StateStop ObjectAward ScoreEnable/Disable 2D ModeEnable/Disable Gravity FlipAward Power-UpDisable Player ControlChange Object SizeChange Object Type State
Change MusicPlay Sound EffectRun ScriptSwitch to Cut-Away ViewChange SkyChange WeatherShatter FOFChange Tagged Linedef's TexturesStart Metal Sonic RaceCondition Set TriggerCall Lua FunctionEarthquakeMake FOF Disappear/ReappearExecute Linedef Executor (from Tag)Execute Linedef Executor (Random Range)
Door SlideDoor SwingMoveMove, OverrideRotate RightRotate Right, OverrideRotate LeftRotate Left, OverrideMove by WaypointsTurn Invisible, IntangibleTurn Visible, TangibleSet Translucency