問題詳情

Questions 19-29Animation traditionaily is done by hand-drawing or painting successive frames of anobject, each slightly different than the preceding frame. In computer animation, althoughthe computer may be the one to draw the different frames, in moat cases the artist willLine draw the beginning and ending frames and the computer will produce the drawings5 between the first and the last drawing. This is generally referred to as computer-assistedanimation, because the computer is more of a helper than an originator.In full computer animation, complex mathematical formulas are used to produce thefinal sequence of pictures. These formulas operate on extensive databases of numbersthat define the objects in the pictures as they exist in mathematical space. The database10 consists of endpoints, and color and intensity information. Highly trained professionalsare needed to produce such effects because animation that obtains high degrees ofrealism involves computer techniques for three-dimensional transformation, shading,and curvatures.High-tech computer animation for film involves very expensive computer systems15 along with special color terminals or frame buffers. The frame buffer is nothingmore than a giant image memory for viewing a single frame. It temporarily holds the imagefor display on the screen,A camera can be used to film directly from the computer's display screen, but forthe highest quality images possible, expensive film recorders are used. The computer20 computes the positions and colors for ihe figures in the picture, and sends this informationto the recorder, which captures it on film. Sometimes, however, the images are stored on alarge magnetic disk before being sent to the recorder. Once this process is completed, it isrepeated for the next frame. When the entire sequence has been recorded on the film, thefilm must be developed before the animation can be viewed. If the entire sequence does25 not seem right, the motions must be corrected, recomputed, redisplayed, and rerecorded.This approach can be very expensive and time consuming. Often, computer-animationcompanies first do motion tests with simple computer-generated line drawings beforeselling their computers to the task of calculating the high-resolution, realistic-lookingimages.
19. What aspect of computer animation does the passage mainly discuss?
(A) The production process
(B) The equipment needed
(C) The high cost
(D) The role of the artist

參考答案

答案：A
難度：適中0.651515
統計：A(43),B(13),C(5),D(5),E(0)

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