© 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 ground ...

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