Env fire

Example of env_fire.

Template:Point ent It handles a single flame (_firesmoke) at its origin. The flame causes heat "damage" to other env_fire entities around it and will eventually ignite them, causing the fire to spread.

Note:The fire may fall through the world on spawn if placed exactly at ground level. Place it a little bit above the ground to fix this.

Bug:This entity doesn't work in Portal. Please see Portal:Env Fire fix for more details  [todo tested in ?]

Bug:While still available, it does not have particle effects in Team Fortress 2. This method is recommended instead.  [todo tested in ?]

In code, it is represented by theCFireclass, defined in thefire.cppfile.

ConVars/Commands

Cvar/Command	Parameters or default value	Descriptor	Effect
fire_maxabsorb	50	Arbitrary number (float)	Upper limit for how much heat "damage" a fire can take before the damage begins to force the flame to grow. Heat is usually absorbed from other env_fires.
fire_absorbrate	3	Multiplier (float)	Scalar for how fast fires can absorb heat.
fire_extscale	12	Multiplier (float)	Effectively only a scalar for the Strength of an env_extinguisherjet.
fire_extabsorb	5	Multiplier (float)	Todo: Effect description.
fire_heatscale	1.0	Multiplier (float)	Scalar for how much damage a fire can do (both to fires and other objects such as the player).
fire_incomingheatscale	0.1	Multiplier (float)	Scalar for how much heat a fire can take from other fires if it is already ignited.
fire_dmgscale	0.1	Multiplier (float)	Todo: Effect description.
fire_dmgbase	1	Health Amount	Base damage that a fire does to objects such as the player. This amount multiplies depending on the user's difficulty setting: Easy: x1 Normal: x2 Hard: x3
fire_growthrate	1.0	Multiplier (float)	Scalar for how much heat a fire can passively add to itself at once. Thinking interval is 0.1 seconds.
fire_dmginterval	1.0	Seconds	Once a fire has damaged something, it will wait this long before it can damage anything again.

Keyvalues

Duration (health) <integer>

Amount of time the fire will burn.

Size (firesize) <integer>

Height (in world units) of the flame.

Attack (fireattack) <integer>

Amount of time the fire takes to grow to full strength.

Type (firetype) <choices>

Either Natural or Plasma. Natural is a general all purpose flame, like a wood fire.

• 0: Natural
• 1: Plasma
  Warning:Effects for this type do not exist!

Ignition Point (ignitionpoint) <float>

Amount of heat 'damage' to take before this flame should ignite.

Damage Scale (damagescale) <float>

Multiplier of the burn damage done by the flame.

Light Color (LightColor) <color255> (in all games since )

Color of dynamic light for this fire.

Light Radius Scale (LightRadiusScale) <float> (in all games since )

Multiplier for the glow radius.

Light Brightness (LightBrightness) <integer> (in all games since )

Integer exponent for the glow brightness.

Loop sound (LoopSound) <sound> (in all games since )

Looping sound to play while this fire is burning.

Ignite sound (IgniteSound) <sound> (in all games since )

One shot sound to play when the fire starts.

Start Disabled (StartDisabled) <boolean>

Stay dormant until activated.

Note:Unless you also checked the "Start On" flag, env_fire will not automatically ignite even if you set this keyvalue to No. Likewise, env_fire will still ignite if you have the "Start On" flag checked, even if this key value is set to Yes.

Flags

Infinite Duration : [1]

Note:In Alien Swarm, an env_fire cannot be extinguished with the fire extinguisher unless Infinite Duration is set.

Smokeless : [2]

Start On : [4]

Start Full : [8]

How?: as in, start out ready to ignite as soon as it's damaged?

Don't drop : [16]

No glow : [32]

Delete when out : [128]

Visible from above : [256] (removed since )

No sound : [256] (in all games since )

No ignite sound : [512] (in all games since )

No fueling once lit : [1024] (in all games since )

Fast burn think : [2048] (in all games since )

Inputs

StartFire

Start the fire.

Extinguish <floatRedirectInput/float>

Puts out the fire permanently in the number of seconds specified.

ExtinguishTemporary <floatRedirectInput/float>

Puts out the fire temporarily in the number of seconds specified.

EnableDisable:

Enable / Disable

Enable/disable this entity from performing its task. It might also disappear from view.

Outputs

OnIgnited

Fires when the fire is first ignited.

OnExtinguished

Fires when the fire is fully extinguished.