Adobe Director Basics

ADOBE DIRECTOR BASICS
3D: Controlling action
vBall1 = member("Physics").getRigidBody("ball1")
vRoom = member("Physics").getRigidBody("room")
member("Physics").disableCollision(vBall1, vRoom)
This code disables collision detection only between the red ball and the room. Collisions between the white ball and
the red ball will still be detected. What do you predict will happen when you click on the red ball?
Collision disabled pairs
You can use physicsMember.getCollisionDisabledPairs() to retrieve a list of the pairs of objects for which you have
explicitly disabled collision management using disableCollision(). Try the following command in the Message
window.
trace (member("Physics").getCollisionDisabledPairs())
-- [[rigidBody("room"), rigidBody("ball1")]]
Changing the callback handler
You can only have one registered collision callback handler at a time. You can change the callback handler by
registering a new one. For example, launch the BallRoom.dir movie, then execute the following command in the
Message window:
member("Physics").registerCollisionCallback(#TestCallback)
This code will make the on TestCallback() in the Test Callback movie script take over the handling of callback
events.
If you want to stop all callback event detection completely, you can use physicsMember.removeCollisionCallback().
This function stops triggering callbacks to the handler registered earlier. To test this behavior, execute the following
command in the Message window:
member("Physics").removeCollisionCallback()
Hold the Option/Alt key down and click on the red ball. No collision ContactReports will appear in the Message
window, and you will see no Foul warning. (You will still lose a point each time you click, because the scoring system
will not be told of any valid interactions before the balls both come to a halt. See the mStartScoring(),
mCheckForSleep() and mCheckCollisions() handlers for details on how the scoring is treated.)
Joints and springs
The Dynamiks xtra provides for four different ways to join to objects together in a way that mutually constrains their
motion.
Angular joints allow objects to rotate freely to any angle, but constrain the relative linear movements of two objects.
See “Angular joint properties” on page 334 for details on how to modify an angular joint after you have created it.
Linear joints allow objects to move freely in any linear direction, but constrain the relative rotations of two objects.
See “Linear joint properties” on page 335 for details on how to modify a linear joint after you have created it.
Springs create a compression or an expansion force between two objects which tend to move them until they are at
a given resting distance from each other. See “Spring properties” on page 336 for details on how to modify a spring
after you have created it.
“D6Joints” on page 338 allow you to control movement of two different types along 3 different axes giving six
degrees of freedom.
Last updated 8/26/2011
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