Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Animation traditionally is done by hand-drawing or painting successive frame of an object, each slightly different than the proceeding frame. In computer animation, although the computer may be the one to draw the different frames, in most cases the artist will draw the beginning and ending frames and the computer will produce the drawings between the first and the last drawing. This is generally referred to as computer-assisted animation, because the computer is more of a helper than an originator.
In full computer animation, complex mathematical formulas are used to produce the final sequences of pictures. These formulas operate on extensive databases of numbers that defines the objects in the pictures as they exist in mathematical space. The database consists of endpoints, and color and intensity
information. Highly trained professionals are needed to produce such effects because animation that obtains high degrees of realism involves computer techniques from three-dimensional transformation, shading, and curvatures.
High-tech computer animation for film involves very expensive computer systems along with special color terminals or frame buffers. The frame buffer is nothing more than a giant image memory for viewing a single frame. It temporarily holds the image for display on the screen.
A camera can be used to film directly from the computer’s display screen, but for the highest quality images possible, expensive film recorders are used. The computer computers the positions and colors for the figures in the picture, and sends this information to the recorder, which captures it on film. Sometimes, however, the images are stored on a large magnetic disk before being sent to the recorder. Once this process is completed, it is replaced for the next frame. When the entire sequence has been recorded on the film, the film must be developed before the animation can be viewed. If the entire sequence does not seem right, the motions must be corrected, recomputed, redisplayed, and rerecorded. This approach can be very expensive and time - consuming. Often, computer-animation companies first do motion tests with simple computergenerated line drawings before selling their computers to the task of calculating the high-resolution, realistic-looking images.
According to the passage, how do computer-animation companies often test motion?
A. They experiment with computer-generated line drawings.
B. They hand-draw successive frames.
C. They calculate high-resolutions images.
D. They develop extensive mathematical formulas.
Đáp án A.
Key words: computer-animation companies, test motion.
Câu hỏi: Theo đoạn văn, làm thế nào các công ty hoạt hình máy tính kiểm tra chuyển động?
Clue: “Often, computer - animation companies first do motion tests with simple computer-generated line drawings before selling their computers...”: Thường thường, các công ty hoạt hình máy tính lúc đầu làm kiểm tra chuyển động với những bản vẽ do máy tính tạo ra trước khi bán máy tính của họ...
Ta chọn đáp án A. They experiment with computergenerated line drawings: Họ thí nghiệm với những bản vẽ do máy tính tạo ra.
Các đáp án khác không phù hợp.
B. They hand-draw successive frames: Họ vẽ tay những khung hình liên tiếp
C. They calculate high-resolutions images: Họ tính toán những bức ảnh có độ phân giải cao
D. They develop extensive mathematical formulas: Họ phát triển công thức toán mở rộng