User Guide

734 Chapter 14: Properties

Example

The following statement tests whether the cast member Today’s Events is a QuickTime or AVI

(Audio-Video Interleaved) digital video and displays the result in the Message window:

put member("Today's Events").digitalVideoType

See also

QuickTimeVersion()

direction

Usage

member(whichCastmember).modelResource(whichModelResource).\

emitter.direction

Description

3D emitter property; a vector that indicates the direction in which the particles of a particle

system are emitted. A particle system is a model resource whose type is

#particle.

The primary direction of particle emission is the vector set by the emitter’s

direction property.

However, the direction of emission of a given particle will deviate from that vector by a random

angle between 0 and the value of the emitter’s

angle (3D) property.

Setting

direction to vector(0,0,0) causes the particles to be emitted in all directions.

The default value of this property is

vector(1,0,0).

Example

In this example, ThermoSystem is a model resource whose type is #particle. This statement sets

the

direction property of ThermoSystem’s emitter to vector(1, 0, 0), which causes the

particles of ThermoSystem to be emitted into a conical region whose axis is the X axis of the

3D world.

member("Fires").modelResource("ThermoSystem").emitter.\

direction = vector(1,0,0)