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OpenTS Manual

Slowdown

How much a smoke system's spawn interval lengthens every frame.

Specification
Applies to
ParticleSystemType
File
rules.ini
Section
[<ObjectType ID>]
Value
floating point
When omitted
0.0

A Smoke system adds this amount to its spawn interval on every frame it runs, whether or not it emits a particle on that frame. The spawn interval is the number of frames between new particles, and it starts at SpawnFrames. A positive value therefore makes the plume pour fastest when it appears and thin steadily from there. Only the Smoke behavior reads it.

rules.ini
[MySmokeSys] ; a ParticleSystemType registered in [ParticleSystems]
BehavesLike=Smoke
HoldsWhat=MySmokePuff ; a ParticleType registered in [Particles]
SpawnFrames=10
Slowdown=.0025
SpawnTranslucencyCutoff=13.0
SpawnCutoff=15.0

Together with SpawnCutoff, this amount sets how long the plume emits, because the plume stops once its interval passes the cutoff. The system above grows from 10 to 15 at .0025 a frame. That takes 2000 frames. At the default game speed, that is 100 seconds in a multiplayer game and about 67 seconds in a campaign mission or skirmish. After 1200 of those frames it passes SpawnTranslucencyCutoff, and its new particles are more translucent from then on.

At zero the interval stays at SpawnFrames. With a SpawnCutoff at or above that, the plume emits until another route ends it.

See also — BehavesLike, SpawnFrames, SpawnCutoff, SpawnTranslucencyCutoff, WindEffect