Sine/Cosine Lookup - Page 5

Finishing Touches

Feel free to preview the movie… it should rotate around the circle. Now, we have a problem… it rotates in the wrong direction! This is an easy fix… we just have to make sure that it doesn’t have a path to rotate the wrong direction on. Select the guide path layer, and draw a line from the top point of the circle to the bottom. Now, create a keyframe on the 11th frame of the guide layer

Now… go back to the first keyframe on the guide layer, and delete the left half of the circle, then the vertical line.

Now, go to the second keyframe on the guide layer, and delete the right half of the circle then the vertical line. You now have a sine and cosine table. Remember, you need to have the same number of frames between the 2 halves of the circle… otherwise the table produces bad values. You also want to have one more frame than you want angle points… IE: if you want to have 360 angles… you would want 361 frames, because the last frame is the same thing as the first frame. It is recommended that you place the table in an independent object.