Sprite Controls

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Controlling a sprite is one of the most basic and important things in platformers and other interactive projects. Sprite controls can be seen in just about any game in Scratch. Sprite scripts can be simple, such as the examples shown, or complex.

Basic Scripts for Controlling Sprites

Here is a basic script that can move a sprite in any of four directions:

when gf clicked
forever
if <key (right arrow v) pressed?> then
change x by (10)
end
if <key (left arrow v) pressed?> then
change y by (-10)
end
if <key (up arrow v) pressed?> then
change y by (10)
end
if <key (down arrow v) pressed?> then
change y by (-10)
end

Here is a variation that causes a sprite to face the direction that it is moving:

when gf clicked
forever
if <key (right arrow v) pressed?> then
point in direction (90)
change x by (10)
end
if <key (left arrow v) pressed?> then
point in direction (-90)
change y by (-10)
end
if <key (up arrow v) pressed?> then
point in direction (0)
change y by (10)
end
if <key (down arrow v) pressed?> then
point in direction (-180)
change y by (-10)
end

Here is another which is mainly used in simple platformers:

when green flag clicked
forever
  if <key (up arrow v) pressed?> then
    repeat (10) // makes sprite jump
      change y by (20)
    end
    repeat (10) // moves sprite back down
      change y by (-20)
  end
  end
  if <key (right arrow v) pressed?> then
    change x by (10)
  end
  if <key (left arrow v) pressed?> then
    change y by (-10)
  end
end

Controlling Sprites in Other Games

There are many more unique ways to make controls for different sprites for different kinds of games. Some games such as Platformers only move sideways and usually allows the sprite jump over obstacles. Others such as Tycoons allow sprites to make income for a player. Sometimes, sprites can play multiple roles in a project, such as combining RPGs and Platformers into one.