What is tween animation?

In Flash, many simple animations are generated by tweening. "Interval" can be understood as automatically generating an intermediate frame between two key frames through calculation, so that the picture can smoothly transition from the previous key frame to the next key frame. There are two kinds of motion tween animation and shape tween animation. The types of FLASH CS4 tween animation include: moving tween animation, shape tween animation and traditional tween animation.

Tween animation: The object moves from one state to another. Such as position change, color change, transparency change and inclination angle change, while the required application object is a whole, such as components.

Shape deformation: the change of an object from one object to another. Shape tweening can be used to realize the animation effect of object shape change, for example, the circle gradually becomes square and the red gradually becomes blue, which requires the application object to be in a dispersed state.

The traditional tween animation is to change the position, size, rotation and inclination of the object and make various effects of the object movement; Change the transparency of objects, filter and color changes, and fade-in and fade-out animations.