We will make an artillery game. You might know this type of game from the very popular Angry Birds series, but this is actually a very old concept, dating back to the earliest computers. It was an obvious choice for imaginative programmers to turn military calculations into a game, because computers were originally used to calculate missile trajectories.
We won't be able to guide any real missiles (luckily) with the scripts in this game. Instead of using proper mathematical calculations, we will use some simple tricks to get the desired results.
In games, it is rarely necessary to be absolutely realistic. Sometimes, bending the rules of reality creates more spectacular results; take Angry Birds, for instance:
We won't build a game as sophisticated as Angry Birds straight away. Our example will be more bare bones but still fun to play. In later projects, we will look back at this first example, and you will be challenged to add new things to this game to make it more interesting.
In this project we will be:
Creating a new project
Starting scripts
Adding targets
Creating a parabolic shot
Creating a landscape
While doing this, you will learn about (among other things):
Drawing with Scratch
Using variables
The xy-coordinate system
Operators and conditions (what has to happen and when)
The very useful cloning feature to quickly duplicate objects
To get started, go to the Scratch website (scratch.mit.edu) and start a new project by clicking on the Create button at the top of the page. If you already have a Scratch account, it might be useful to log in first, so that you can save your work in your account. If you are new to Scratch and are unfamiliar with the interface, have a look at Appendix, The New Scratch Interface.