Diagnosis
When your script doesn't run as expected, Scratch offers some strategies for solving your problems.
Six Scratch troubleshooting tips
Lead Image © kudryashka, 123RF.com
I hope that you take the Scratch code snippets provided in previous articles and expand on them or find inspiration to create your own projects. As you create, however, you will run into problems when the script you created doesn't work as expected. In this article, I share some strategies to help you diagnose problems in your script, so that you can find a solution.
Verifying Sprite Movements
In Figure 1, the script starting with the when flag clicked block moves the sprite around a square, but when you run the script, there is no movement of the sprite.
The script is straightforward; looking at it, you just know it should work. To troubleshoot this script, start by pulling the move (50) steps and turn 90 degrees blocks out of the main script shown in Figure 1. Then click on the two-block script one time. Does it move? Then click a second, third, and fourth time. This mimics the original script, and it allows you to confirm that the move and turn blocks do actually work and advance the sprite around the stage.
[...]
Use Express-Checkout link below to read the full article (PDF).
Buy this article as PDF
Express-Checkout as PDF
Pages: 4
Price $2.95
(incl. VAT)
(incl. VAT)
Buy Raspberry Pi Geek
TABLET & SMARTPHONE APPS
US / Canada
UK / Australia
Related content
-
Synchronizing with broadcasts
This article draws inspiration from the popular Pokémon Go app to recreate a sprite hunting game in Scratch. The project explores synchronization and randomness as the player explores various backdrops in search of sprites.
-
How to create a scrolling sprite project
With the help of an existing project, we show you how to program scrolling sprites in a series or in a continuous loop.
-
Creating an animation viewer
We show how to use the Scratch slideshow feature to create animations.
-
Build a simple shooter game
We show how to use Scratch sprites to shoot at various targets.
-
Drawing and animating a Hungry Cat Racer
We show how to use Scratch's built-in graphics editor to create animations for a racing game.
