Design of Animation Sequences
A key frame is a detailed drawing of the scene at a certain time in the animation sequence. Within each key frame, each object is positioned according to the time for that frame. Some key frames are chosen at extreme positions in the action; others are spaced so that the time interval between key frames is not too great. More key frames are specified for intricate motions than for simple, slowly varying motions.
一個關鍵幀是動畫序列中特定時刻的一個場景的詳細圖示。在每一個關鍵幀中，每一個對象的位置依賴于該幀的時刻。選擇某些關鍵幀作為行為的極端位置。另一些則以不太大的時間間隔進行安排。對于復雜的運動，要比簡單的緩慢變化運動安排更多的關鍵幀。
In-betweens are the intermediate frames between the key frames. The number of in-betweens needed is determined by the media to be used to display the animation. Film requires 24 frames per second, and graphics terminals are refreshed at the rate of 30 to 60 frames per second. Typically, time intervals for the motion are set up so that there are from three to five in-betweens for each pair of key frames. Depending on the speed specified for the motion, some key frames can be duplicated. For a 1-minute film sequence with no duplication, we would need 1440 frames. With five in-betweens for each pair of key frames, we would need 288 key frames. If the motion is not too complicated, we could space the key frames a little farther apart.
插值幀是關鍵幀之間過渡的幀。插值幀的數量取決于用來顯示動畫的介質。電影膠片要求每秒24幀，而圖形終端按每秒30到60幀來刷新。一般情況下，運動的時間間隔設定為每一對關鍵幀之間有3~5個插值幀。依賴于為運動指定的速度，有些關鍵幀可重復使用。一分鐘沒有重復的電影膠片需要1440幀。如果每兩個關鍵幀之間有5個插值幀，則需要288幅關鍵幀。如果運動并不是很復雜，我們可以將關鍵幀安排得稀一點。
General Computer-Animation Functions
Some steps in the development of an animation sequence are well suited to computer solution, These include object manipulations and rendering, camera motions, and the generation of in-betweens. Animation packages, such as Wave-front, for example, provide special functions for designing the animation and processing individual objects.
Another typical function simulates camera movements. Standard motions are zooming, panning, and tilting. Finally, given the specification for the key frames, the in-betweens can be automatically generated.
通用計算機動畫功能
開發動畫序列中的某幾步工作很適合計算機進行處理。其中包括對象管理和繪制、照相機運動和生成插值幀。動畫軟件包，如Wavefront，提供了設計動畫和處理單個對象的專門功能。
另一種典型功能是模擬照相機的運動，標準的運動有拉鏡頭、搖鏡頭和傾斜。最后，給出對關鍵幀的描述，然后自動生成插值幀。
文章來源于領測軟件測試網 http://www.kjueaiud.com/
