#Tween Tween uses the core jQuery animate function to create arbitrary animations beyond animating CSS properties. Instead of taking a list of properties to animate, tween expects a callback function to executed on each step of the animation.

###.tween(step, [duration,] [easing,] [complete]) step - A function to be called after each step of the animation.
duration - A string or number determining how long the animation will run.
easing - A string indicating which easing function to use for the transition.
complete - A function to call once the animation is complete.

###.tween(step, options ) step - A function to be called after each step of the animation.
options - A map of additional options to pass to the method. Supported keys:
duration: A string or number determining how long the animation will run.
easing: A string indicating which easing function to use for the transition.
complete: A function to call once the animation is complete.
step: A function to be called after each step of the animation.
queue: A Boolean indicating whether to place the animation in the effects queue. If false, the animation will begin immediately.
specialEasing: A map of one or more of the CSS properties defined by the properties argument and their corresponding easing functions.

#Curve Curve defines functions for creating curves as a function of time

###$.curve.circle(t, [options]) t - A number representing a percentage of time.
options - A map of additional options to pass to the method. Supported keys:
x: A number, in pixels, the center point of the circle on the x-axis.
y: A number, in pixels, the center point of the circle on the y-axis.
radius: A number, in pixels, the radius of the circle.
phase: A number, in degrees, to shift the angle.
angle: A number, in degrees, to rotate the circle around the center.
arc: A number, in degrees, to determine portion of the circle to draw. Default: 360
invert: A boolean, flips the y-axis.
tangent: A boolean, include the tangent angle.

###$.curve.ellipse(t, [options]) t - A number representing a percentage of time.
options - A map of additional options to pass to the method. Supported keys:
x: A number, in pixels, the center point of the ellipse on the x-axis.
y: A number, in pixels, the center point of the ellipse on the y-axis.
major: A number, in pixels, the major radius of the ellipse.
minor: A number, in pixels, the minor radius of the ellipse.
phase: A number, in degrees, to shift the angle.
angle: A number, in degrees, to rotate the circle around the center.
arc: A number, in degrees, to determine portion of the circle to draw. Default: 360
invert: A boolean, flips the y-axis.
tangent: A boolean, include the tangent angle.

###$.curve.sine(t, [options]) t - A number representing a percentage of time.
options - A map of additional options to pass to the method. Supported keys:
x: A number, in pixels, the start point of the wave on the x-axis.
y: A number, in pixels, the start point of the wave on the y-axis.
amp: A number, in pixels, the peak deviation of the wave.
phase: A number, in degrees, to shift the angle.
frequency: A number of peaks in one period of the wave.
angle: A number, in degrees, to rotate the wave around the start point.
arc: A number, in degrees, to determine portion of the wave to draw. Default: 360
invert: A boolean, flips the y-axis.
tangent: A boolean, include the tangent angle.

###$.curve.bezier(t, [options]) t - A number representing a percentage of time.
options - A map of additional options to pass to the method. Supported keys:
x: A number, in pixels, the start point of the curve on the x-axis.
y: A number, in pixels, the start point of the curve on the y-axis.
points: An array of x and y coordinates for the bezier curve. Minimum 2 points required.
angle: A number, in degrees, to rotate the curve around the start point.
invert: A boolean, flips the y-axis.
tangent: A boolean, include the tangent angle.