Unit Overview - PowerPoint Presentation

Slide1

Unit Overview

We are going to look at computer programming and how to create your very own computer gameThe piece of software we will be using is called Scratch, it is completely free and available to download from:http://scratch.mit.edu/You’ll complete week by week tutorials before finally designing, creating and evaluating your own game

ScratchSlide2

Scratching The Surface

Lesson 1Simple SpritesSlide3

Objectives

ObjectivesLearn how to write simple scripts to make Sprites move in ScratchSlide4

Scratch

In computer graphics, a sprite is a two-dimensional image or animation that is used in a Computer GameEach sprite has a set of rules that define how it moves and how it

behavesSlide5

Scripts

Games are made by giving sprites a sequence of rules to follow. These are called scriptsThese scripts are often dependent upon other variables or events taking place first

Scripts

often need to be told to

repeat

or

loop

over and over again, until something instructs it to stop!Slide6
Slide7

Open ScratchSlide8

This is

sprite1

, it comes already loaded in the

SPRITE LIST

and has already been placed on the

STAGE

Task:

Right Click and delete

sprite1

from the

SPRITE LISTSlide9

Task:

Click on the insert new sprite button.Slide10

Task:

Select the sprite called

cat2

from the

animals

folder.Slide11

Task:

Rename the sprite and call it

cat

. Remember to always call new sprites sensible names!Slide12

Task:

From the

control menu

, drag and drop this rule into the

SCRIPTS AREASlide13

Task:

From the

motion menu

, drag and drop the

point towards

rule into the

SCRIPTS AREA

and join it inside the forever rule

Task:

choose

mouse pointer

from the drop down list.Slide14

Task:

From the

control menu

, drag and drop the

forever

rule into the

SCRIPTS AREA

and join it together.

Compatible rules can be joined together in the

SCRIPTS AREASlide15

Task:

change

number of steps

to 3.

Task:

From the

motion menu

, drag and drop the

move 10 steps

rule into the

SCRIPTS AREA

and join it underneath the point towards rule.Slide16

Task:

run your program by pressing the

green flag

.Slide17

Notice how the

co-ordinates

change as you move the mouse and sprite. Slide18

Save

your work as

cat and mouse

in your new

Scratching The Surface Folder

and open up a new blank Scratch screenSlide19

Task:

Click on the insert new sprite button.Slide20

Task:

Select the sprite called

crab1-a

from the

animals

folder.Slide21

Task:

Rename the sprite and call it

crab

Task:

click the

only face left-right

button.Slide22

Task:

Build and test the following script for the crab sprite.

Task:

Add a further 3 scripts to make the crab move in all four directions.Slide23

Task:

click the

can rotate

button.

Task:

What happens now when your crab moves?

Can you explain why?Slide24

Directions – Up; Down; Left; RightSlide25

Task:

Save

your work as in your

Scratch FolderSlide26

Plenary

You should be familiar with most of this code

Find and fix the deliberate faults

Can you explain how it all works?