Scratch

I "freeze" sprites quite often, in the sense that they aren't moving or reacting, though I usually hide them as well.

This can be done by having a local variable ("Active" would be a good name for it) that is set to 0 if the sprite is "frozen" or "locked", and to 1 otherwise.  The scripts for the sprite can be loops that examine the value of the variable.

When I recieve "StartSprite1"
Set Active = 1
Show
Broadcast "RunSprite1"

When I recieve "RunSprite1"
Forever if <Active = 1>
'
(Do things)
'
If Damage > 3  ---"Damage" is another variable
Hide                 --- You could omit this if you don't want to hide the sprite.
Set Active = 0

If the sprite gets damaged (or whatever causes it to "freeze"), all of the scripts that are like this will stop running.  I do have one example of a project where a sprite "freezes" using this method: http://scratch.mit.edu/projects/EdnaC/81934, this is a turn-based game, so the sprites that aren't active remain on screen but aren't controlled.


Hope this helps.

-MrEd

Last edited by EdnaC (2008-03-19 12:14:01)

Good idea, but i find that

When I recieve music
forever
if <music=1>
play song "cheese" until done
else
stop script

seems to work just fine.

I agree with barnatp that freeze / melt blocks would sometimes be very useful.

Another useful idea would be to provide a blocks that make use of Scratch's lock/unlock mechanism to make sprites draggable/undraggable with the little paddlock symbol on them.

Freeze is just the same as <stop all> , but there is a resume and it only effects the sprite it is placed in.