seyon4.md

Goal: Today, we will make our game character move up and down!

Plan:

• Methods: character_rect.y += speed, character_rect.y -= speed, if keys[pygame.K_UP]:, if keys[pygame.K_DOWN]:
• Stretch: Combining horizontal and vertical movement for diagonal motion

Let’s make your character move!

• if keys[pygame.K_UP]:

  • Code: if keys[pygame.K_UP]:
  • Metaphor: Pressing Up. Game knows you want to go up.
  • Result: Your character gets ready to go higher.
  • Why it helps: Checks if you pressed the Up arrow.

• character_rect.y -= speed

  • Code: character_rect.y -= speed
  • Metaphor: Float up like a balloon.
  • Result: Your square moves higher on the screen.
  • Why it helps: Actually moves your character upwards.

• if keys[pygame.K_DOWN]:

  • Code: if keys[pygame.K_DOWN]:
  • Metaphor: Pressing Down. Game knows you want to go down.
  • Result: Your character gets ready to go lower.
  • Why it helps: Checks if you pressed the Down arrow.

• character_rect.y += speed

  • Code: character_rect.y += speed
  • Metaphor: Drop down like a heavy rock.
  • Result: Your square moves lower on the screen.
  • Why it helps: Actually moves your character downwards.

Stretch — Diagonal Movement

• Code: if keys[pygame.K_UP] and keys[pygame.K_LEFT]:
• Metaphor: Move two ways at once, like a squirrel.
• Result: Your character moves up and left at the same time.
• Why it helps: Lets your character move diagonally.

Your turn!

1. Open your game.py file.
2. Before your main game loop, add your character and speed:

   character_rect = pygame.Rect(250, 150, 50, 50)
   speed = 5

3. Inside your game loop, after keys = pygame.key.get_pressed(), add:

   if keys[pygame.K_UP]:
       character_rect.y -= speed
   if keys[pygame.K_DOWN]:
       character_rect.y += speed

4. Make sure you draw character_rect (e.g., pygame.draw.rect(screen, (255, 0, 0), character_rect)).
5. Run your game. Press UP and DOWN. If your red square moves, it worked!

What keys do you press to make your character move up and down?