.tween

public this .tween(Object properties, Number duration)

properties

Object of 2D properties and what they should animate to

duration

Duration to animate the properties over (in frames)

This method will animate a 2D entities properties over the specified duration. These include x, y, w, h, alpha and rotation.

The object passed should have the properties as keys and the value should be the resulting values of the properties.

Example

Move an object to 100,100 and fade out in 200 frames.

Crafty.e("2D, Tween")
   .attr({alpha: 1.0, x: 0, y: 0})
   .tween({alpha: 0.0, x: 100, y: 100}, 200)