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This page provides information on the Phoenix FD Birth operator for Part= icle Flow.
This Particle Flow operator creates particles based on the fluid pa= rameters. It reads grid channels from the loaded data in a Phoenix Simulato= r and creates and places the particles in certain places of the Phoenix gri= d. Note that this operator not only creates particles, but also sets their = positions. You could place another operator after it if you want to overrid= e the birth positions, e.g. Position Icon.
For each grid channel, a curve is used to determine the probability of p= article being born. This way you can create particles where a grid channel = has high values, low values, or if your diagram is flat, particles will be = born equally throughout the grid. You can see the usual ranged for the diff= erent grid channels here= a>.
You can improve the viewport performance of this operator by increasing = the PFlow Cached Frame Count option in the = Phoenix FD Globa= l Preferences, However, this will increase the memory usage.
Phoenix Simulator | node =E2=80=93 Determ= ines which Simulator will be used to read the fluid data from.
Start | start =E2=80=93 The fir= st frame at which the birth of particles begins.
Stop | stop =E2=80=93 The last = frame at which the birth of particles ends.
Rate | rate =E2=80=93 A multipl= ier for the birth probability.
Seed | seed =E2=80=93 An initia= l value for the random numbers generator.
Combine | combine =E2=80=93 The= method used to combine the diagram for Temperature, Smoke and Speed.
Add =E2=80=93 The v=
alues are added.
Multiply =E2=80=93 The values are=
multiplied.
Biggest =E2=80=93 The biggest v=
alue is selected.
Temperature/Smoke/Speed/Fuel | use_t,use_= s,use_v, use_f, td,sd,vd,fd =E2=80=93 Diagrams representing the b= irth density based on each source channel.
Reset =E2=80=93 Resets the corresponding diagram w= ith its default content.