This page provides information on the Thinking Particles Phoenix FD Birth operator.

Overview


The Phoenix FD Thinking Particles operators allow you to create and modify particles based on the Phoenix FD fluid simulation.

The birth probability is based on the fluid parameters and is determined by the corresponding diagrams. For example, particles can be created only in those areas of the Phoenix FD simulation where the Temperature is above a certain threshold, there is no Smoke, or the Speed is very high.

UI Path

||Thinking Particles Properties window|| > Dynamic Set > Operators > Phoenix FD > PhoenixFD TP Birth

 

Inputs



Time [ time ] – Time at which the TP Birth operator should evaluate. 

On [ bool ] – True if the TP Birth operator should be enabled.

Position [ position ]– The positions at which the operator will test its conditions for birthing.

Particle [ particle ] – The particles at whose positions the operator will test its conditions for birthing.

When no Position or Particle input is present, the entire Phoenix FD Simulator is tested for birth conditions.

Birth Rate [ scalar ] – Overrides the value set in the TP Operator's UI.

Lifespan [ scalar ] – Overrides the value set in the TP Operator's UI.

Lifespan Variation [ scalar ] – Overrides the value set in the TP Operator's UI.

Size [ scalar ] – Overrides the value set in the TP Operator's UI.

Size Variation [ scalar ] – Overrides the value set in the TP Operator's UI.

Mass [ scalar ] – Overrides the value set in the TP Operator's UI.

Mass Variation [ scalar ] – Overrides the value set in the TP Operator's UI.

 

Outputs


*Born Particle [ particle ] – The particles born from the TP Birth operator.

*Particle Frame Counter [ integer ] – The amount of particles born from the TP Birth operator on the current frame.

*Particle Animation Counter [ integer ] – The amount of particles born from the TP Birth operator during the current thinkingParticles simulation.

 "*" denotes an array output - multiple values will be output during a single evaluation of the TP Birth operator.

 

Parameters


Phoenix Simulator | node – Determines which Simulator will be used to read the fluid data from.

Group – Specifies a thinkingParticles Group to place the newly generated particles into.

Rate | rate_type[0], rate_percent – A multiplier for the birth probability.

Rate (max prt/s) | rate_type[1], rate_per_sec – A multiplier for the birth probability.

Seed | seed – An initial value for the random numbers generator.

Lifespan | lifespan – The average lifespan of the generated particles. When Variation (%) is set to 0, all particles have exactly the same lifespan.

Variation (%) | lifespan variation – Allows you to vary the lifespan of the generated particles. If set to 100%, the shortest living particles will have a live twice shorter than average, and the longest living particles will have double the average Lifespan.

Size | size – The average Size of the generated particles. When Variation (%) is set to 0, all particles have exactly the same Size.

Variation (%) | size variation – Allows you to vary the Size of the generated particles. If set to 100%, the smallest particles are two times smaller than average and the largest particles will have double the average Size.

Mass | Mass – The average Mass of the generated particles. When Variation (%) is set to 0, all particles have exactly the same Mass.

Variation (%) | mass variation – Allows you to vary the Mass of the generated particles. If set to 100%, the lightest particles have Mass two times lower than average and the heaviest particles will have double the average Mass.

Combine | combine – The method used to combine the diagram for Temperature, Smoke and Speed.

Add – The values are added.
Multiply – The values are multiplied.
Biggest  – The biggest value is selected.

Temperature/Smoke/Speed/Fuel | use_t, use_s, use_v, use_f – Diagrams representing the birth density based on each source channel.

Reset – Resets the corresponding diagram with its default content.

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