func_smokevolume

func_smokevolume is a brush entity available in all Source games.

Entity description

A brush entity that spawns smoke particles within its volume, commonly used for large, localised areas of fog. Use the trigger texture or the fog texture.

Warning: Smoke volumes should be used sparingly as they can decrease performance in heavily detailed scenes, or scenes with high amounts of action. Particle systems may be cheaper to use, depending on CPU usage restraints.

Warning: Smoke volumes shouldn't be placed in the same volume as func_precipitation is. Otherwise engine may freeze at the end of loading the level. It is probably caused by some particle coding that do not accept this two types of sprites to render at once (in the same volume).

Note:The default material is particle/smoke_grenade1, which does not exist. However, particle/particle_smokegrenade does.

Keyvalues

Particle Color1 (R G B) <color255>

Particle color 1

Particle Color2 (R G B) <color255>

Particle color 2

Note:Darker particle colors will appear nearly invisible without being close to a bright light source.

Material <material>

The material to use for the particles

Particle Draw Width (units) <float>

The size of the particles, in units/inches. (Typical Values: 128,175,200,500,512)

Particle Spacing Distance (units) <float>

The distance between the particles inside the volume. The lower the number, the denser the particles, and the more overdraw there will be. It is best to keep it as high as you can without it looking bad. (Typical Values: 125,150,200 and sometimes 80 or 480)

Density Ramp Speed (seconds) <float>

Time to go from density 0 to density 1, in seconds.

Rotation Speed (degrees/sec) <float>

The speed that the particles should rotate, in degrees per second. (Typical Values: 3,10)

Movement Speed (units/sec) <float>

The speed that the particles should move around, in units/inches per second.

Density [0..1] <float>

Particle density, from 0 to 1. (Typical Values: .1-.5)

Targetname:

Name <string>

The targetname that other entities refer to this entity by.

Entity Scripts <scriptlist> (New with Left 4 Dead 2)

Space delimited list of VScript files (without file extension) that are executed after all entities have spawned. The scripts are all executed in the same script scope, later ones overwriting any identical variables and functions.

Script think function <string> (New with Left 4 Dead 2)

Name of a function in this entity's script which will be called automatically every 100 milliseconds (ten times a second) for the duration of the script. It can be used to create timers or to simulate autonomous behavior. The return value (if present) will set the time until the next call.

Note:Try to avoid expensive operations in this function, as it may cause performance problems.

Flags

• 1 : Emissive

Changes how the smoke particles are drawn. Emissive is 4 times more expensive to render.

Inputs

Bug: All inputs are missing in Team Fortress 2

SetRotationSpeed  <float>

Set the particle rotation speed (in degrees per second).

SetMovementSpeed  <float>

Set the particle movement speed (in inches per second).

SetDensity  <float>

Set the particle density. It should be a range from 0 to 1.

Targetname:

Kill

Removes this entity and any entities parented to it from the world.

KillHierarchy

Functions the same as Kill, although entities with a large number of children are killed marginally faster.

AddOutput  <string>

Evaluates a keyvalue/output on this entity. It can be potentially very dangerous, use with care.
Format: <key> <value>
Format: <output name> <targetname>:<inputname>:<parameter>:<delay>:<max times to fire, -1 means infinite>

FireUser1 to FireUser4

Fire the OnUser outputs; see User Inputs and Outputs.

Use  !FGD

Same as a player invoking +use; may not do anything. Can also be invoked by creating an output that does not specify an input.
This input is not included in Valve's FGDs.

RunScriptFile  <script> (New with Left 4 Dead 2)

Execute a VScript file from disk, without file extension. The script contents are merged with the script scope of the receiving entity.

RunScriptCode  <string> (New with Left 4 Dead 2)

Execute a string of VScript source code in the scope of the entity receiving the input. String quotation may be needed when fired via console.

Bug:  In , the code is executed in the script scope of the entity that fires the output, not the one receiving the input.

Warning: Never try to pass string parameters to a script function with this input. It will corrupt the VMF structure because of the nested quotation marks, which then must be removed manually with a text editor.

CallScriptFunction  <string> (New with Left 4 Dead 2) !FGD

Execute a VScript function in the scope of the receiving entity.

Note:This input is missing from some games FGD files.

SetLocalOrigin  <origin> (New with Alien Swarm) !FGD

Set this entity's origin in the map.

Note:This input is missing from some games FGD files.

SetLocalAngles  <angles> (New with Alien Swarm) !FGD

Set this entity's angles in the map.

Note:This input is missing from some games FGD files.

Outputs

Trigger:

OnEndTouch

Fired when an entity stops touching this trigger. Only entities that passed this trigger's filters will cause this output to fire. (activator is the exiting entity)

OnEndTouchAll

Fires when the last entity in the entity's area exits this trigger or when this entity is disabled. Only entities that passed this trigger's filters are considered. (activator is the last exiting entity)

OnTouching (New with Half-Life 2: Episode Two / Source 2007)

OnNotTouching (New with Half-Life 2: Episode Two / Source 2007)

Fired when the TouchTest input is called.

TriggerOnce:

OnStartTouch

Fired when an entity starts touching this trigger. The touching entity must pass this trigger's filters to cause this output to fire. (activator is the toucher)

OnTrigger

Fired whenever the trigger is activated. (activator is the activator)

Targetname:

OnUser1 to OnUser4

These Outputs each fire in response to the firing of the like-numbered FireUser1 to FireUser4 Input; see User Inputs and Outputs.

OnKilled  (New with Left 4 Dead)

This Output fires when the entity is killed and removed from the game.