C+Victor

[|Carl Victor]

Key Frame (NOUN)

A key frame in animation and filmmaking is a drawing that defines the starting and ending points of any smooth transition. ([|Source])



Like a From/To/By animation, a key-frame animation animates the value of a target property. It creates a transition among its target values over its [|Duration]. However, a From/To/By animation creates a transition between two values, but a single key-frame animation can create transitions among any number of target values. Unlike a From/To/By animation, a key-frame animation has no From, To , or By properties with which to set its target values. Instead, you describe a key-frame animation's target values by using key-frame objects. To specify the animation's target values, you create key-frame objects and add them to the animation's KeyFrames property. When the animation runs, it transitions between the frames you specified. In addition to supporting multiple target values, some key-frame methods even support multiple interpolation methods. An animation's interpolation method defines how it transitions from one value to the next. There are three types of interpolations: discrete, linear, and splined. To animate with a key-frame animation, you complete the following steps:
 * Declare the animation and specify its Duration, as you would for a From/To/By animation.
 * For each target value, create a key frame of the appropriate type, set its value and [|KeyTime], and add it to the animation's [|KeyFrames] collection.
 * Associate the animation with a property, as you would with a From/To/By animation.