Adobe Director Basics

ADOBE DIRECTOR BASICS
3D: Controlling action
For information on how to create, access and delete a spring, see “Joints and springs” on page 330. To experiment with
the way a spring will link two rigid objects together, download the Springs Basics.dir.
The Springs Basics.dir movie shows how a spring can be controlled
The Springs Basics.dir movie has seven screens where you can test the effect of modifying all eight parameters for a
spring.
restLength defines the distance between the models at which neither a compression nor an expansion force will
act between the two models.
objectA and objectB define the rigidBody objects connected to each end of the constraint.
pointA and pointB are the vector positions in the frame of reference objectA and objectB to which the constraint
is to be attached.
stiffness is a non-negative floating point number to define the strength of the spring.
damping is a non-negative floating point number to define how much the spring must oscillate before reaching a
rest position.
flags is a symbol which defines whether the spring must exert a force only when it is compressed
(#kDuringCompression), only when it is extended (#kDuringExpansion), or in both directions (#kBoth).
Additional example
The movie Net using Joints.dir demonstrates how to create a net out of a grid of rigidBody objects held together by
springs.
Last updated 8/26/2011
337