Func movelinear

Template:Base brush 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.

Note:This entity may also be referred to as momentary_door. That was the name used for it in GoldSource.

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.

In code, it is represented by theCFuncMoveLinearclass, defined in thefunc_movelinear.cppfile.

Flags

FuncMoveLinear:

Not Solid : [8]

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

Keyvalues

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.

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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 <floatRedirectInput/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 <floatRedirectInput/float>

Set the speed and update immediately.

TeleportToTarget <targetnameRedirectInput/string> (only in )

Teleport to the origin of a given entity.

ResetPosition <floatRedirectInput/float> (only in )

Set a new start position, parameter relative to wherever the current one is.

Todo: Parameter might actually be optional?

SetDamageFilter <targetnameRedirectInput/string>

Sets a filter for this entity for when it receives damage.

EnableDamageForces

Allows the entity to be pushed by damage done to it (usually force amount correlates with the damage done).

DisableDamageForces

Prevents the entity from being pushed by damage done to it.

Todo: move/mention at proper place

Outputs

FuncMoveLinear:

OnFullyOpen

!activator = !caller = this entity
Fired when the brush reaches the end position (starting position + (move direction * move distance)).

OnFullyClosed

!activator = !caller = this entity
Fired when the brush reaches the starting position.

See also

• Example map of a counter-weighted door.