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

Integrating the light sensor


The light sensor, pictured in the following figure, can detect changes in the amount of light nearby. We can use the sensor for doing things such as detecting shadows or increase in light.

Getting ready

In this recipe, we are going to explore working with values from the light sensor. We will make a simple program where the sprite brightness will correspond to the amount of light coming into the light sensor.

Keep in mind as we go through this recipe, the light sensor returns values similar to the slider. Values will range from 0 to 100, 0 representing no light.

How to do it...

Let's get started with some steps that will get us there.

  1. Open up a new Scratch file. As always, you can customize the sprite or background to match your preferences.

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

  4. Drag over the block from the Looks category, and you'll have:
  5. Change the effect selected to be brightness by clicking on the drop-down arrow in the block...