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Foundation ActionScript 3.0 Animation: Making Things Move! by Keith Peters

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Chapter 3. TRIGONOMETRY FOR ANIMATION

What we'll cover in this chapter:

  • What is trigonometry?

  • Angles

  • Trig functions

  • Rotation

  • Waves

  • Circles and ellipses

  • Pythagorean Theorem

  • Distance between two points

  • Important formulas in this chapter

I wanted to put this chapter near the beginning of the book, as you'll be using trigonometry extensively for animation techniques, starting with the examples in Chapter 5. In fact, I'll even touch on it in the next chapter on rendering techniques. However, feel free to jump ahead if you already know basic trig or are just anxious to get into animating things. You can always come back here when you come across something you don't understand.

A lot of people shy away from math and trigonometry, saying things like, "I'm not good ...

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