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# Event : Helper

    Event - superclass: helper; super-superclass:node - 0:0 - classID: #(1962490627, 515064576)

Value > MAXWrapper > Node > Helper > Event

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Description:

The Event lets you group Actions in Particle View to define the appearance of particles over a certain period of time. Creating instances of this class gives you empty holders that can be filled with Actions using the exposed Interfaces’ Methods.

Constructor:

    Event...

## Event Interfaces:

The following Interfaces are exposed by the Event Class:

Interface: ActionList

Interface: PViewItem

Interface: MaterialHolder

EXAMPLE
    --Open the Particle View to watch the results:
    particleFlow.openParticleView()
    --> OK

    ev = event()--Create an empty Event
    --> $Event:Event 01 @ [0.000000,0.000000,0.000000]

    --In order to fill in the empty Event, we have to disable
    --the automatic Event encapsulation of newly created Actions.
    particleFlow.beginEdit()
    --> OK

    --Now we can create a new Birth action to add to the Event.
    br = birth()
    --> $Birth:Birth 01 @ [0.000000,0.000000,0.000000]

    --We can now append the new Birth Action to the empty Event:
    ev.appendAction br
    --> true

    --We can also create Action class instances
    --and append them to the Event in a single step:
    ev.appendAction (Position_Icon())
    --> true
    ev.appendAction (Speed())
    --> true
    ev.appendAction (ShapeStandard())
    --> true
    ev.appendAction (DisplayParticles())
    --> true

    --Finally, we can exit the Edit mode to enable automatic
    --Event encapsulation again:
    particleFlow.endEdit()
    --> OK

#### See Also

- Particle Flow Classes