© Jeanine Meyer 2018
Jeanine MeyerThe Essential Guide to HTML5https://doi.org/10.1007/978-1-4842-4155-4_4

4. Cannonball and Slingshot

Jeanine Meyer1 
(1)
Purchase, NY, USA
 
In this chapter, we cover
  • Maintaining a list of objects to draw on the screen

  • Rotating objects drawn on the screen

  • Mouse drag and drop operations

  • Calculations to simulate ballistic motion (effects of gravity) and collisions

Introduction

This chapter demonstrates another example of animation, in this case simulation of ballistics , also called projectile motion. A ball or ball-like object maintains a constant horizontal (x) displacement, with the vertical displacement changing as it would due to gravity. The resulting motion is an arc. The ball stops when it (virtually) hits the ...

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