Scratch

AmoebaMan wrote:

I think a lot of other scratch users are wishing for this, so here it is:  It would be nice for the next version of scratch to feature a command block stating "wait until I receive [signal]".  such a block would let us create scripts that pause until a trigger is set.

I agree. It can be very tedious, making so many variables. It would also be helpful to have a
[blocks] <{ broadcast  }>[/blocks]  block, so you can make something like "Wait until a is broadcast":

[blocks]<wait until> <( a <=><{ broadcast  }>  )> [/blocks]
Or, you can have:
[blocks] <forever if><( a <=><{ broadcast  }>  )>
   <repeat until><( b <=><{ broadcast  }>  )>
   <move( 10 )steps>
  <end>
<end>[/blocks]

Last edited by hpotter134 (2010-03-18 11:30:30)

There is an easy way to do this:
[blocks] <wait until><( <{ var }> <=> 1 )> [/blocks]
That's the way I would do it, any way.

climber59 wrote:

Then make a boolean that says '..... broadcasting?'

But broadcasts are instantaneous.

hpotter134 wrote:

coolstuff wrote:

climber59 wrote:

Then make a boolean that says '..... broadcasting?'

But broadcasts are instantaneous.

coolstuff wrote:

I don't know how many times I've had to type this, but it WON"T HAPPEN BECAUSE BROADCASTS AREN'T BOOLEAN.

Sorry. I didn't think about this enough.

But would it be possible to have a "message" reporter block? That way we could have a
script that says:


[blocks]<wait until><(<{ message }>  <=> "a message")>[/blocks]

and the "message" block, like "answer", stays the same until another message is broadcast. Is this possible? Please explain, for I really don't know much about this. I just started learning Smalltalk and have a long way to go. 

Ah... Please excuse my answer from way back then - I was rather rude, wasn't I?

Regardless, I think it could happen: While an "I receive" message isn't boolean because broadcasts are instantaneous, "I have received" or "I am receiving" message will do just fine.

hpotter134 wrote:

Sorry. I didn't think about this enough.

But would it be possible to have a "message" reporter block? That way we could have a
script that says:


[blocks]<wait until><(<{ message }>  <=> "a message")>[/blocks]

and the "message" block, like "answer", stays the same until another message is broadcast. Is this possible? Please explain, for I really don't know much about this. I just started learning Smalltalk and have a long way to go. 

Broadcasts don't really exist in any Smalltalk images, except for Scratch. They implimented this just fo it. 

This topic is rather old, so I doubt anyone cares, but I succeeded in finally making myself a "message" block that does what I suggested. It uses class variables, and accessing methods and stuff. I posted it here in the Advanced Topics section.

Then, instead of


I can do

Last edited by hpotter134 (2011-01-25 20:34:50)