func_movelinear

GoldSrc

Source Engine

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Class hierarchy
CFuncMoveLinear ↳CBaseToggle ↳CBaseEntity
func_movelinear.cpp

func_movelinear is a brush entity available in all Source games. It moves linearly along a given distance, in a given direction. Unlike a func_door, it can be positioned anywhere along its axis of movement, making moving things much simpler in most cases while also using less memory. For moving water, use func_water_analog instead.

Note:The SetPosition input and Start Position keyvalue do not perform any bounds checking, so values less than 0 and greater than 1 can be used. Negative values will move in the opposite direction to the movement direction, and values greater than 1 will move it in multiples of the set Move Distance. Moving past the opened/closed position does not trigger the OnFullyOpen and OnFullyClosed outputs.

Bug:There are bugs that may arise when parenting this entity to any of these: func_movelinear, func_lookdoor, func_water_analog. A func_door (or for func_water_analog, func_water) can be used as a workaround. (see here for a code fix)^{[ Code Fix]}

Confirm:Might be fixed in Portal 2? Parented movelinears are used extensively for this game's piston platforms.

  [todo tested in ?]

Bug:In , parenting a move_rope or keyframe_rope will cause the entities to disappear. Clarification required if the rope entities are deleted or are simply not rendered.  [todo tested in ?]

AltNames: This entity is also tied to momentary_door. This was the original classname in GoldSrc.

Flags

FuncMoveLinear:

• 8: Not Solid

Bug:Physics objects cannot be constrained to this entity when this flag is enabled.  [todo tested in ?]

Keyvalues

Note:For Keyvalues and Inputs affecting brush rendering, see Brush entity/Rendering related keyvalues and inputs

Name (targetname) <string>

The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g. parentname or target).
Also displayed in Hammer's 2D views and Entity Report.

See also:  Generic Keyvalues, Inputs and Outputs available to all entities

FuncMoveLinear:

Move Direction (Pitch Yaw Roll) (movedir) <angle>

The direction the entity will move in.

Start Position (startposition) <float>

Position of brush when spawned, where 0 is the starting position and 1 is starting position + (move direction * move distance).

Speed (speed) <integer>

The speed that the brush moves, in inches per second.

Move Distance (movedistance) <float>

The distance from the starting point that the brush should move, in inches.

Block Damage (blockdamage) <float>

The amount of damage to do to any entity that blocks the brushes, per frame.

Bug:Block damage doesn't function on players who passed through a trigger_teleport using noclip, though it will have effect again if the the player goes through a trigger_teleport without noclip.  [todo tested in ?]

Sound played when the brush starts moving. (startsound) <sound>

The sound to play when the brush starts moving.

Sound played when the brush stops moving. (stopsound) <sound>

The sound to play when the brush stops moving.

Inputs

FuncMoveLinear:

Open

Move the brush to the end position (starting position + (move direction * move distance)).

Close

Move the brush to the starting position.

SetPosition <float>

Move the brush to a specific position, where 0 is the starting position and 1 is the starting position + (move direction * move distance).

SetSpeed <float>

Set the speed and update immediately.

Outputs

FuncMoveLinear:

OnFullyOpen

Fired when the brush reaches the end position (starting position + (move direction * move distance)).

OnFullyClosed

Fired when the brush reaches the starting position.

See also

• func_water_analog - entity linked to to the same C++ class
• Example map of a counter-weighted door.