On this drawing, tick off the position of each ball on the arc path with an X. Be sure to number them. In feature and tv animation, frames are usually numbered 1,3,5,7,9 and so on. To simplify things here, let's number them 1,2,3,4, etc. For an explanation of why odd numbers are used in animation, see the appendix at the bottom of the page. It's really boring, and should be a really nice cure for insomnia.
If you have a backlight, then switch it on. Put a clean sheet over the arc path drawing. Now you are ready to begin drawing the "Key" drawings of the animation: the points where the ball is at its most extreme. In this example, its highest and lowest points in the bounce.As you can see, frame 1 is the first and highest point in the sequence. It is therefore an extreme drawing. Frame 7 is the squash drawing where the ball hits the ground. It is also an extreme, as are drawings 12,17,21,25,28 and 31.
On seperate sheets of paper, you should draw the different key frames as named above. If done correctly you should have a series of drawing numbered 1,7,12,17,21,25,28 and 31.Be sure that you write the frame numbers on the top right and bottom right of each drawing. If your drawing is a key frame (as these are) then put a circle around the number.
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