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Birth Operator 143

Material Frequency Operator (page 2–189)

Material Static O perator (page 2–187)

Position Icon Operator (page 2–147)

Position O b ject Op erator (page 2–148)

Rotation Operator (page 2–153)

Scale Operator (page 2–156)

Spin Operator (page 2–154)

Select and Uniform Scale (page 1–441)

Script Operator (page 2–208)

Shape O perator (page 2–176)

Shape Facing Operator (page 2–176)

Shape Instance O perator (page 2–178)

Shape Mark Operator (page 2–183)

Speed Operator (page 2–159)

Speed By Icon Operator (page 2–162)

Speed By Surface O perator (page 2–167)

The utility operators are:

Cache Operator (page 2–197)

Display Operator (page 2–202)

Notes O perator (page 2–206)

Render Operator (page 2–206)

See also

Flows (page 2–208)

Tests (page 2–210)

Birth and Death

Birth Operator

Particle View (page 2–125) >ClickBirthinaneventoradd

a Birth operator to the particle system and then select it.

The Birth operator enables creation of particles

within the Particle Flow system using a set of

simple parameters. In general, use Birth as the

firstoperatorinanyeventconnecteddirectlytoa

global event (page 3–949); this is c alled the birth

event (page 3–916).

You can specif y a total number of particles, or a

rate of particles born per second. You can also tell

the system when to begin emitting particles, and

when to stop.

Note: The Birth operator must always come at the

beginning of a particle st ream; the system doesn’t

let you position it elsewhere. You can place a

Birthoperatorinanisolatedevent,butyoucan’t

then wire that event in series with a stream that

already uses a Birth operator. However, you can

wiremultipleBirthoperators,eachinitsown

event, into a particle stream with an existing Bir th

operator , in parallel. The following procedure

illustrates this. If you need to create particles

midstream, use the Spawn Test (page 2–230) or

Collision Spawn Test (page 2–215) test.