Session 3: Let’s make the characters move

Working plan

  • Can we move the characters?
  • The block MOTION
  • First movements: MOVE, BOUNCE, SET ROTATION, GO TO, GLIDE
  • Interactive structure
  • Directions
  • Personatges animats

Let’s make the characters move

Icona tasquesStep by step

  • Sign in.
  • Create a new project with the name m1repte 31.
  • Analize the category MOTION:
    Blocs de moviment
  • In case of help, remember:
    Ajuda moviment
  • Let’s see what happens if we make our character move 10 steps. Is is a little bit? Is it a lot?
    Mou-te 10 passos
  • Can we repeat that movement several times? Is MOVE 50 the same as REPEAT 5 TIMES – MOVE 10?
    Repeteix 10 vegades Repeteix per sempre
  • Using these blocks we are building an interactive structure.
    Estructura iterativa

Icona repte Repte 1

  • Go on working on the project m1repte31.
  • Get the character start moving from the centre of the scene.
  • Get it bounce when touching the edge.
  • Get it change direction (without facing down).

 

Icona pista Clue: We can indicate any point of the scene with POLAR COORDINATES. They will help us describe one point of the scene with two numbers:

Number x: indicates horizontal position. Its values include from -240 (the most left point) to 240 (the most right point)

Nymber y: indicate vertical position. its values include from -180 (the lowest point) to 180 (the highest point)
Coordenades cartesianes
The centre of the scene is (0, 0):

Ves a

More movements, more real

Icona tasquesStep by step

  • Create a new project with the name m1repte32.
  • Let’s go to the category COSTUMES:
    Pestanya vestits
  • Let’s have a look at the costumes the Scratch’s cat has got:
    Vestits gat
  • Test the programme we had done, but now we must alternate the two costumes of the cat:
    Moviment gat
  • When we click on the gallery of the characters, we can the their costumes when choosing one:
    Vestits ballarina

Icona repte Repte 2

  • Open the project m1repte32
  • Choose a character from the gallery with several costumes.
  • Create a simple animation and make the character move and change its costume.

Moreover…

The Scratch programme offers other ways of moving in the scene.

Icona tasquesStep by step

  • In the category MOTION, the block TURN turns the character and makes it look at another direction:
    Gira dreta Gira esquerra
  • Create different combinations of the blocks TURN, MOVE, REPEAT to sew how the character is moving.
  • The block GO TO 0,0 sends the character to the centre of the scene and the block POINT IN DIRECTION 90, makes the character look at the right side, which is the initial position:
    Apunta en direcció
  • The block GLIDE let us move the character to the indicated position in the indicated time:
    Llisca
  • Play trying these blocks and checking how they work. These block don’t allow us to use different costumes.

Icona repte Repte 3

  • Create a new project with the name m1repte33.
  • With the character of the dancer, who has 4 costumes, cretate a programme that starts with the last costume “ballerina-d”. It must also use the 4 costumes within less than 1 second each one. Then, we have to simulate it does the wheel.