Sway

A behavior to make objects (like grass) sway randomly.

Authors and contributors to this community extension: Bubble.

Use the Sway behavior to make multiple instances of an object sway at different times. For example, this can give a grass object an animated look that is always changing and is different to the other grass objects.

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Please note: This behavior uses For each object events so be aware of slow downs that may occur from many instances of Sway objects. The behavior works best if both the Center and Origin points are at the base of the object.

Sway works by:

angling (pivoting) the object to the left and right while also changing its Y scale up and down
the angle and Y scale tween durations will take a random amount of time from a range of values
it's this random tween duration that creates the unique movement pattern for each instance of the object.

How to use:

set left and right angles (degrees) for the object to sway to
for equal sway on each side set the left angle to the negative number of the right angle
eg. set left angle to -5 and right angle to 5
set a minimum and maximum Y scale amount for the object to stretch and shrink to
set to 1 for no change, more than 1 for stretching and less than 1 for shrinking
set a range for the angle and Y scale tween times (seconds)
the tweens will take a random amount of time between the minimum and maximum values