User Guide

Controlling the 3D World 523
Collision commands
Collision commands allow you to override certain aspects of the default behavior set for models
during collisions. If neither of the models involved in the collision has
resolve set to TRUE,
you can manually resolve the collision using resolveA(true) for model A or resolveB(true)
for model B.
Selecting models
Selecting models (picking) refers to clicking on models in a 3D cast member. Because models are
objects that exist within a 3D cast member and a 3D sprite, they are not normally sensitive to
mouse clicks. Normally it is only the entire sprite that is sensitive to mouse clicks.
You can use Lingo to determine specifically which models have been clicked when a user clicks
within a 3D sprite. In practice, this allows for changing model positions to make it appear that an
action such as a button being pushed or a door being opened has taken place. Picking can be
accomplished using cast member or camera commands.
pointOf
Contact
Get Vector describing world-space location of collision. Available
only if the collision has been resolved. Occurs if the model’s
collision modifier
resolve property is TRUE (1) or either the
collisionData resolveA() or collisionData
resolveB()
method is called.
collision
Normal
Get Vector indicating direction of collision. Available only if the
collision has been resolved. Occurs if the model’s collision
modifier
resolve property is TRUE (1) or either the
collisionData resolveA() or collisionData
resolveB()
method is called.
Command Description Returns
collisionData.resolv
eA
(
trueOrFalse)
Resolves collision for model A. Nothing
collisionData.resolv
eB
(
trueOrFalse)
Resolves collision for model B. If the argument is FALSE
(0)
, the collision won’t be resolved. This overrides the
collision.resolve property, if any, set for model B.
Nothing
Property Access Description