The Collide action detects collisions between particles and modifies their
velocities in response to the collision. All particles are approximated to
a circular shape for the collisions and they are assumed to be of even
density.
If the particles reach a stationary, or near stationary, state under an
accelerating force (e.g. gravity) then they will fall through each other.
This is due to the nature of the alogorithm used, which is designed for
speed of execution and sufficient accuracy when the particles are in motion,
not for absolute precision.
This action has a priority of -20, so that it executes
after other actions.
bounce:Number
The coefficient of restitution when the particles collide. A value of
1 gives a pure elastic collision, with no energy loss. A value
between 0 and 1 causes the particles to loose enegy in the collision.
A value greater than 1 causes the particles to gain energy in the collision.
Implementation public function get bounce():Number public function set bounce(value:Number):voidpublic function Collide(bounce:Number = 1)
The constructor creates a Collide action for use by an emitter.
To add a Collide to all particles created by an emitter, use the
emitter's addAction method.
Parameters | bounce:Number (default = 1) |
See also
override public function addedToEmitter(emitter:Emitter):void
Instructs the emitter to produce a sorted particle array for optimizing
the calculations in the update method of this action and
adds an UpdateOnFrame activity to the emitter to call this objects
frameUpdate method once per frame.
Parameters
| emitter:Emitter — The emitter this action has been added to.
|
See also
public function frameUpdate(emitter:Emitter, time:Number):void
Called every frame before the particles are updated, this method
calculates the collision radius of the largest two particles, which
aids in optimizing the collision calculations.
This method is called using an UpdateOnFrame activity that is
created in the addedToEmitter method.
Parameters
| emitter:Emitter — The emitter that is using this action.
|
| |
| time:Number — The duration of the current animation frame.
|
See also
override public function removedFromEmitter(emitter:Emitter):void
Removes the UpdateOnFrame activity that was added to the emitter in the
addedToEmitter method.
Parameters
| emitter:Emitter — The emitter this action has been added to.
|
See also
override public function update(emitter:Emitter, particle:Particle, time:Number):void
Causes the particle to check for collisions against all other particles.
This method is called by the emitter and need not be called by the
user.
Parameters
| emitter:Emitter — The Emitter that created the particle.
|
| |
| particle:Particle — The particle to be updated.
|
| |
| time:Number — The duration of the frame - used for time based updates.
|
See also
Sun Feb 27 2011, 06:00 PM Z 
ActionBase 
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