A ''smoothable'' [JSup Animations|animation] can produce fluid graphic effect (such as movement, appearing/disapearing, etc.) with discrete changes of the expression that define the [JSup Animations|animation] state. 
With a fluid animation, for example, a boolean state can produce a fluid animation between two states.

A ''smoothable'' [JSup Animations|animation] is [JSup Delayable animation|'''delayable'''] also.
== Smooth parameters ==
These parameters define how the transition from a state to another is performed:
 * '''Smooth speed''': expressed in some UM/s (for example <TT>%/s</TT> for an [JSup Opacity animation|Opacity animation], <TT>pixel/s</TT> for an [JSup Horizontal move animation|Horizontal move animation], <TT>°/s</TT> for a [JSup Rotation animation|Rotation animation]) define how quickly the transitions will occur. '''Zero''' means ''no smooth'' (transitions will be performed instantly.
 * '''Curve''': the speed factor when the transition start, and the divisor when the transition ends.
  * a value of <TT>1</TT> means that the transition will be uniform (constant speed); 
  * a value greater than 1 means that the transition starts faster and ends slower;
  * a value less than 1 means that the transition starts slower and ends faster.
 * '''Max delta''': for some animation define the maximum transition ''distance'' that will be performed in a fluid way. Transitions grater than this value will be performed instantly.