m (See Also: Fixed block name.)
m (Example Uses)
Line 36: Line 36:
 
<scratchblocks>
 
<scratchblocks>
 
when backdrop switches to [level1 v] //in a sprite
 
when backdrop switches to [level1 v] //in a sprite
go to x:(0) y:(0)
+
go to x: (0) y: (0)
 
</scratchblocks>
 
</scratchblocks>
 
*A game over message
 
*A game over message

Revision as of 15:41, 19 June 2013

Switch Backdrop to ()
2.0 Switch Backdrop to ().png
Category Looks
Type Stack
Introduced in 2.0

The Switch Backdrop to () block is a Looks block and a Stack block. The block changes the Stage's backdrop to the specified one.

This block is a commonly used block; it is used whenever the Stage must switch to a specific backdrop (instead of the Next Backdrop block, which does not always give the same backdrop). A variable (or any reporter) containing a number or the name of a backdrop can be dropped in.

A sprite's version is Switch to Costume ().

History

Prior to Scratch 2.0, this block was called Switch to Background () and didn't fire an event upon running. During 2.0 development, this block was also called Switch to Scene (), then Switch to Backdrop (), before being finalized on Switch Backdrop to ().

Workaround

Main article: List of Block Workarounds

This block can be replicated with the following code:

repeat until <(wanted backdrop #) = (backdrop #)>
   next backdrop
end

However, it is often much faster to use the original block.

It can also be replicated with a sprite that stamps the new background.

Example Uses

Because of its simplicity, this block does not have a specific list of main uses — it is simply used to change the background of the Stage. It can be used in animations, games, simulations — anything that requires changes between backgrounds.

Some common uses are as follows:

  • Starting a level
switch backdrop to [level1 v]
when backdrop switches to [level1 v] //in a sprite
go to x: (0) y: (0)
  • A game over message
switch backdrop to [game over v]
when backdrop switches to [game over v]
hide
  • Simply changing backdrops
switch backdrop to [scene2 v]

The Switch to Backdrop () block can be used in many ways; its simplicity is all.

See Also