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env_smokestack
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 class hierarchy
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CSmokeStack defined in smokestack.cpp
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env_smokestack is a point entity available in all 
Source games. It spits out a constant stream of smoke. You can place up to two env_particlelights near the smoke stack to add ambient light to its particles.
Keyvalues
Targetname:
- Name
(targetname)<string> - The targetname that other entities refer to this entity by.
- Initial State
(InitialState)<choices> - Initial state of the entity.
- 0: Off
- 1: On
- Spread at the base
(BaseSpread)<integer> - Amount of random spread in the origins of the smoke particles when they're spawned.
- Spread Speed
(SpreadSpeed)<integer> - Amount of random spread in the velocity of the smoke particles after they're spawned.
- Speed
(Speed)<integer> - The speed at which the smoke particles move after they're spawned.
- Particle start size
(StartSize)<integer> - Size of the smoke particles when they're first emitted.
- Particle end size
(EndSize)<integer> - Size of the smoke particles at the point they fade out completely.
- Emission rate
(Rate)<integer> - Rate at which to emit smoke particles (i.e. particles to emit per second).
- Length of smoke trail
(JetLength)<integer> - Length of the smokestack. Lifetime of the smoke particles is derived from this & particle speed.
- Wind X/Y Angle
(WindAngle)<angle> - This specifies the wind direction. It is an angle in the XY plane.
- Wind Speed
(WindSpeed)<integer> - The strength of the wind.
- Particle material
(SmokeMaterial)<string> - Material of the smoke particles emitted by this stack.
- Twist
(Twist)<integer> - The amount, in degrees per second, that the smoke particles twist around the origin.
- Roll Speed
(Roll)<float> - Amount of roll in degrees per second.
- Base Color (R G B)
(rendercolor)<color255> - The color of the particles.
- Translucency
(renderamt)<integer> - How much you can see through the particles.
Inputs
TurnOn- Turn on the smokestack.
TurnOff- Turn off the smokestack.
Toggle- Toggles the smokestack between on and off state.
JetLength<integer>- Sets Length of smoke trail.
Rate<integer>- Sets Emission rate.
Speed<integer>- Sets Speed.
SpreadSpeed<integer>- Sets Spread Speed.
