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Birth Operator 139

Material Frequency Operator (page 2–185)

Material Static Operator (page 2–183)

Position Icon Operator (page 2–143)

Position Object Operator (page 2–144)

Rotation Operator (page 2–149)

Scale Operator (page 2–152)

Spin Operator (page 2–150)

Select and Uniform Scale (page 1–421)

Script Operator (page 2–204)

Shape Operator (page 2–172)

Shape Facing Operator (page 2–172)

Shape Instance Operator (p age 2–174)

Shape Mark Operator (page 2–179)

Speed Operator (page 2–155)

Speed By Icon Operator (page 2–158)

Speed By Surface Operator (page 2–163)

The utility operators are:

Cache Operator (page 2–193)

Display Operator (page 2–198)

Notes Operator (page 2–202)

Render Operator (page 2–202)

See also

Flows (page 2–204)

Tests (page 2–206)

Birth and Death

Birth Operator

Particle Vie w (page 2–12 1)

>ClickBirthinaneventoradd

a Bi rth 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 3–1043)

;thisiscalledthe

birth

event (page 3–1010)

You can specify 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 stream; the system doesn’t

let you position it elsewhere. You can place a

Birthoperatorinanisolatedevent,butyoucan’t

then wi re that event in series with a stream that

already u ses a Birth operator. However, you can

wiremultipleBirthoperators,eachinitsown

event, into a particle stream with an existing Bir th

operator,

in parallel

.Thefollowingprocedure

illustrates this. If you need to create particles

midstream, use the

Spawn Test (page 2–226)

Collision Spaw n Test (p age 2–211)

test.