Book Image

Scratch Cookbook

By : Brandon Milonovich
Book Image

Scratch Cookbook

By: Brandon Milonovich

Overview of this book

Scratch 2.0 is an easy to use programming language that allows you to animate stories and create interactive games. Scratch also gives you the capability of using programming to calculate complicated calculations for you. Scratch Cookbook will lead you through easy-to-follow recipes that give you everything you need to become a more advanced programmer. Scratch Cookbook will take you through the essential features of Scratch. You'll then work through simple recipes to gain an understanding of the more advanced features of Scratch. You will learn how to create animations using Scratch. Sensory board integration (getting input from the outside environment) will also be covered, along with using Scratch to solve complicated and tedious calculations for you. You'll also learn how to work through the exciting process of project remixing where you build on the work of others. Scratch Cookbook will give you everything you need to get started with building your own programs in Scratch that involve sounds, animations, and user interaction.
Table of Contents (17 chapters)
Scratch Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Working with the slider


We've seen from the previous recipe that the slider can play a valuable role in working with basic programs. The slider can be very useful anytime you need a number in a range, and want that to be sensitive for the user to control.

In this recipe, we're going to dig deeper into using the slider. We are going to make a basic program where our sprite will move up and down as the slider moves.

Getting ready

We'll accomplish this by having a forever loop that is constantly checking the slider value, and applying it.

Open a new Scratch project to get started on this one.

How to do it...

Here are the steps we will need to get this recipe going:

  1. Drag over a block.
  2. Insert a forever loop directly below this top hat block.

  3. From the Motion category, drag a set y to () block, as shown in the following screenshot:

  4. Head over to the Sensing category and drag a () sensor value block, replacing the value of 0 from the block created in step 3.

  5. You should now have the following code, and if...