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OpenTS Manual

SpawnCutoff

The spawn interval a smoke system stops emitting at.

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

A Smoke system stops emitting once its spawn interval passes this figure. The interval starts at SpawnFrames, grows by Slowdown every frame, and is compared with this figure at the end of each frame. Puffs the system already made still turn into any successor particles their type names, and the system is removed when the last particle has expired. Only the Smoke behavior reads it.

A figure below SpawnFrames is passed on the system’s first frame, so the plume emits at most one particle and stops. A type that sets neither SpawnFrames nor this key behaves that way.

For a plume that runs, set this figure above SpawnFrames and give Slowdown a positive value. With Slowdown at zero the interval never grows, and the plume emits until something else ends it.

rules.ini
[MySmokeSys] ; a ParticleSystemType registered in [ParticleSystems]
BehavesLike=Smoke
HoldsWhat=MySmokePuff ; a ParticleType registered in [Particles]
SpawnFrames=10
Slowdown=.0025
SpawnCutoff=15.0 ; reached after 2000 frames

Passing this figure is the only way a smoke system ends by itself. The other routes, such as a positive Lifetime, are listed under Ending a system.

See also — BehavesLike, SpawnFrames, Slowdown, SpawnTranslucencyCutoff, Lifetime