func_button

GoldSrc

Source Engine

Source 2

Class hierarchy
CBaseButton ↳CBaseToggle ↳CBaseEntity
buttons.cpp

func_button is a brush entity available in all Source games.

It is designed to be used for a player-usable button. When +used by the player, it moves to a pressed position. For an example of a func_button used to make a keypad, see the button_keypad prefab.

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

Glow Entity (glow) <targetname> (only in )

The name of an entity that will get a +use glow for this button.

Note: the "Hand Extend" animation will play when looking at Glow Entity.

Bug:The Engine cannot properly find the Glow entity if it's off-grid. It will pick several entities close to where the supposed off-grid glow entity is.  [todo tested in?]

Use Look-At Limit (min_use_angle) <string> (in all games since )

Limit the usable look-at angle. -1 is looking directly away, 0 is looking perpendicular, 1 is looking directly at. To allow a deviation of at most 45°, insert cos(45°) ≈ 0.7071 or for 5° use cos(5°) ≈ 0.9962 (see dot product).

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

Specifies the direction of motion to move when the button is used.

Delay Before Reset (-1 stay) (wait) <integer>

Amount of time, in seconds, after the button has been pressed before it returns to the starting position. Once it has returned, it can be used again. If the value is set to -1, the button never returns.

Speed (speed) <integer>

The speed that the button moves, in units per second.

Health (Obsolete) (health) <integer>

Legacy method of specifying whether or not the button can be shot to activate it. Use the Damage Activates spawnflag instead.

Lip (lip) <integer>

The amount, in inches, of the button to leave sticking out of the wall it recedes into when pressed. Negative values make the button recede even further into the wall.

Sounds (sounds) <integer choices>

Make this button emit a sound when pressed.

Note:The list below was made for Half-Life 2. All games support this keyvalue, but some don't have a number of these sound files. To edit these sounds, look for Buttons.snd (followed by a number from the Value column in this table) in hl2/scripts/game_sounds_world.txt or your game's appropriate Soundscript file.

Choices
Value	Description	Default Sound
Buttons
0	None (Silent)	common/null.wav
1	Big zap & Warmup	buttons/button1.wav
2	Access Denied	buttons/button2.wav
3	Access Granted	buttons/button3.wav
4	Quick Combolock	buttons/button4.wav
5	Power Deadbolt 1	buttons/button5.wav
6	Power Deadbolt 2	buttons/button6.wav
7	Plunger	buttons/button7.wav
8	Small zap	buttons/button8.wav
9	Keycard Sound	buttons/button9.wav
10	Buzz	buttons/button10.wav
11	Buzz Off	buttons/button11.wav
12	latch locked	doors/latchlocked2.wav
13	Latch Unlocked	doors/latchunlocked1.wav
14	Lightswitch	buttons/lightswitch2.wav
15	small bleek	buttons/button15.wav
16	small deny	buttons/button16.wav
17	small doop	buttons/button17.wav
18	small tech deny	buttons/button18.wav
19	click and combine screen fuzz	buttons/button19.wav
20	roomy beep	buttons/button20.wav
Levers
21	lever or wheel: turn + move sqeek	buttons/lever1.wav
22	lever or wheel: latch + release gas	buttons/lever2.wav
23	lever or wheel: ratchet + sqeek	buttons/lever3.wav
24	lever or wheel: large ratchet	buttons/lever4.wav
25	lever or wheel: clanky + gas release	buttons/lever5.wav
26	lever or wheel: latch + large metal thud	buttons/lever6.wav
27	lever or wheel: smaller ratchet	buttons/lever7.wav
28	lever or wheel: smaller lever move	buttons/lever8.wav
New buttons
31	shock buzz	buttons/button21.wav
32	clickbeep	buttons/button22.wav
33	tech blip	buttons/button23.wav
34	clickbeepbeep open	buttons/button24.wav
35	small high blip	buttons/button12.wav
36	small tech fuzz blip	buttons/button13.wav
37	small click bleep (change to lightswitch)	buttons/button14.wav
Combine Buttons
40	combine door lock - locked	buttons/combine_button_locked.wav
41	combine blip growl	buttons/combine_button1.wav
42	combine squick growl	buttons/combine_button2.wav
43	combine whine purr	buttons/combine_button3.wav
44	combine click talk	buttons/combine_button4.wav
45	combine click growl fizz	buttons/combine_button5.wav
46	combine click fizz (deny)	buttons/combine_button6.wav
47	combine click talker	buttons/combine_button7.wav

Locked Sound (locked_sound) <integer choices>

Sound played when the player tries to use the button, and fails because it's locked.

Choices
Value	Description	Default Sound
0	None	common/null.wav
2	Access Denied	buttons/button2.wav
8	Small zap	buttons/button8.wav
10	Buzz	buttons/button10.wav
11	Buzz Off	buttons/button11.wav
12	Latch Locked	doors/latchlocked2.wav

Unlocked Sound (unlocked_sound) <integer choices>

Sound played when the button is unlocked.

Confirm:doesn't seem to work?

Choices
Value	Description	Default Sound
0	None	common/null.wav
1	Big zap & Warmup	buttons/button1.wav
3	Access Granted	buttons/button3.wav
4	Quick Combolock	buttons/button4.wav
5	Power Deadbolt 1	buttons/button5.wav
6	Power Deadbolt 2	buttons/button6.wav
7	Plunger	buttons/button7.wav
8	Small zap	buttons/button8.wav
9	Keycard Sound	buttons/button9.wav
10	Buzz	buttons/button10.wav
13	Latch Unlocked	doors/latchunlocked1.wav
14	Lightswitch	buttons/lightswitch2.wav

Locked Sentence (locked_sentence) <integer choices>

A sentence played when the player tries to use the button, and fails because it's locked.

Choices
Value	Description
0	None
1	Gen. Access Denied
2	Security Lockout
3	Blast Door
4	Fire Door
5	Chemical Door
6	Radiation Door
7	Gen. Containment
8	Maintenance Door
9	Broken Shut Door

Unlocked Sentence (unlocked_sentence) <integer choices>

A sentence played when the button is unlocked.

Choices
Value	Description
0	None
1	Gen. Access Granted
2	Security Disengaged
3	Blast Door
4	Fire Door
5	Chemical Door
6	Radiation Door
7	Gen. Containment
8	Maintenance area

Master (Obsolete) (master) <targetname>

Legacy support: The name of a master entity. If the master hasn't been activated, this button cannot be pressed.

Flags

Don't move : [1]
Toggle : [32]

Makes the button fire the outputs "OnIn" and "OnOut" if being pressed repeatedly.

Touch Activates : [256]
Damage Activates : [512]
Use Activates : [1024]
Starts locked : [2048]
Sparks : [4096]

Non-solid : [16384] (in all games since (also in ))

Tip:Use func_rot_button instead for non-solid buttons in other games, or use a %CompileNonSolid material.

Inputs

Lock

Lock the button, preventing it from functioning.

Bug:Do not lock while pressed; it will not return when unlocked.  [todo tested in?]

Unlock

Unlock the button, allowing it to function.

Press

Activate the button as if it was pressed.

PressIn

Activate the button as if it was pressed, sending it to the bottom position.

PressOut

Unpress the button, sending it to the top position. Fire OnPressed output.

Outputs

OnDamaged

Fired when the button is damaged.

Tip:If you have a button over a prop, which fires outputs by damaging the button brush, you might as well use a prop_dynamic with its "OnTakeDamage" output. This will use the props collision mesh as the button, instead of a brush.
This is very useful for small items, since small button brushes may compile with missing faces, due to a vbsp bug.

OnPressed

Fired when the button is pressed.

OnUseLocked

Fired when the button is used while locked.

OnIn

Fired when the button reaches the in/pressed position.

OnOut

Fired when the button reaches the out/released position. "Delay Before Reset" will fire this output, after the delay is over. If the "Toggle" flag is set, pressing the button again will fire this output.

See also

• func_rot_button
• momentary_rot_button