Scratch

Has any investigation been done as to what it would take to create a Java Applet that would execute BYOB applications ?

Panther is expanding the scratch java applet to execute the new blocks

That is totally awesome !

to bharvey

    xly wrote:

    I've found an interesting workaround ! I create a "mirror" Motion Reporter function (move# 80 ) copying the same Motion Command (move 80),and then this "mirror" function can be used into a list of motion commands (For each Item of ...list (move# 80)(turn# 90)(move# 80)(turn# 90)(move# 80)(turn# 90)(move# 80)(turn# 90)...run with Inputs))

bharvey wrote

I don't understand.  FOR EACH takes commands to begin with, not reporters.  So I'm not seeing why you need to make reporters out of the motion commands.

Sorry if I'm being dense....
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xly replies... As far as I know :

FOR EACH ITEM OF LIST
RUN
does not work with Motion commands as item of the list, like (move 10)
but it works with the same command modified as to be a Motion reporter.

Beside of this, I can create my  List of Motion reporters s into the Script editor, "manually", but the procedure ADD thing TO List does not work.

Jens wrote:

[(If only I could post a screenshot... can anybody help me out here?)

Great minds think alike.     I was making the screenshot as you were posting!



Edit: It's pretty hard to read inline, at least on my screen, so here's a link you can download: http://cs.berkeley.edu/~bh/runlist.bmp

PS But, Jens, there /is/ a bug: the check box of the list gets unchecked when I run the script.

Last edited by bharvey (2010-04-28 18:28:02)

bharvey wrote:

fanofcena wrote:

with all the cool new features BYOB Will soon become a pros language for experimentisation

Thanks to everyone for your interest in BYOB 3.

We are really hoping to /avoid/ the "pro language" situation, because we think it'll hurt the Scratch community if we split it into the experienced people using BYOB and the newcomers in the Scratch kiddie pool.  The entire community benefits from the way experienced Scratchers mentor newcomers.

This is why I've been working hard at convincing Mitchel and the Scratch Team that these features belong in main line Scratch!  We view BYOB 3 as a "proof of concept" that kids won't be frightened away even if they don't immediately "get" first class procedures.  (And I think a kid who isn't ready to write MAP can still learn to use it if a teacher provides it.)

There are just a few things left on the we-can't-let-it-out-the-door-in-this-state list.  Jens (who's doing all the hard work) is hoping for a release version within a week, but *that isn't a promise*! :-)

The final summer release will be even better.  Once you have the idea of first class data, there are lots more candidates: costumes, sounds, sprites, threads...  Some of those are technically very hard, but those are the kinds of things we're thinking about.

Darn. You may have noticed my scratch pro contest.

_________________________________________________________
this is a fake signature. i'm not kidding.

Hi xly,

it's wonderful that a Logo person like you finds BYOB attractive!

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Are you Ironic ??
Anyway you are efficient
You have fixed the problem...
But I had just discovered this evening this strange C-Shape "The script".

I've slightly modified your script as to make a Motion procedure (Logo influence again) with an Input variable for the size of the square.

What can be done with all this stuff. We shall see.

Thanks

xly wrote:

Are you Ironic ??

Umm, not at all, Xavier. I remember you said that you liked Logo. You know, Brian here is a Logo guy, and he's alright    (there, now I'm being ironic, because he's fantastic).

shadow_7283 wrote:

I need a global variable for the blocks I am building. Is this possible (without having the block avaliable to sprites)?

I see, you want a variable that's hidden, but shared among several blocks.  *Yes* (I'm happy to say it because I've had to say "no" or "maybe" too much lately) BYOB 2.99 can do that!



To use these procedures you say RUN[spritevar1]
etc.  Nobody else can see secretvar except via the two procedures.

Is this what you wanted?

Last edited by bharvey (2010-04-28 22:27:53)

Umm, Brian, your custom made blocks don't work if you use them in the block editor.

Last edited by ElectricSparx (2010-04-28 23:42:05)

ElectricSparx wrote:

Here's Gobo's new look! (remade and drawn by me)

Actually, our Gobo conveys a message that yours doesn't, a message that's very relevant to the core of the BYOB3 enterprise.  I'm still waiting for someone outside of Berkeley to catch on. 

ElectricSparx wrote:

Umm, Brain,

  People have been misspelling my name that way since I joined the Cub Scouts 52 years ago and that's what they put on my membership card.  It was a refreshing change when I first went to Australia and met someone who /pronounced/ my name "Brawn"! 

ElectricSparx wrote:

your custom made blocks don't work if you use them in the block editor.

Uh, they do for me, so you'll have to be more specific.  What did you try, exactly, and what happened?  Thanks!

Kingdaro wrote:

Is there any way you can run an entire list of scripts all at once?

Or better yet, add 4 to all the values in a list all at once? The atomic feature is slow.

There isn't any magic in computers; no matter how you program it, unless you have a superscalar processor that does lots of similar arithmetic operations in parallel, it's going to take time proportional to the length of the list to do anything to every item.

But in terms of programming convenience, in tools.sb you'll find MAP.  Just say

   MAP   [< > + <4>] OVER <my-list>

... but when you're dragging the + block onto the MAP block, after you see the white halo, before you let go of the mouse button, move in a little closer, until the white halo goes away and instead you see a grey border around the + block.  /Then/ let go.

Alternative if you don't like that user interface:

  MAP [THE [< > + <4>] BLOCK] OVER <my-list>

THE BLOCK is down at the bottom of the Operators menu.  The grey-border thing is a shortcut for THE BLOCK.  This will all be explained in tutorial #2, which I'm supposed to be writing right now instead of answering forum messages.     (But this is fun!)

Kingdaro wrote:

Also, sometimes the custom blocks don't work in presentation mode.

Okay, this makes three times today, I think, that I've had to respond the same way to a bug report, so don't take it personally when I start shouting.  HEY, GANG, WE REALLY APPRECIATE BUG REPORTS, BUT IT'S VERY HARD TO EVALUATE AND REPRODUCE A BUG IF THE REPORT SAYS "SOMETIMES" INSTEAD OF GIVING DETAILS!

There, now I feel better.     So, what does your custom block do, and how does it fail -- error message, wrong value computed, right value displayed at the wrong scale, sprite does/doesn't go offscreen...  etc.  Thanks!
A screenshot might be best of all if it's hard to explain in words just what happens.

As of just now, the BYOB.image on http://byob.berkeley.edu is 2.99.003, fixing most of the bugs reported here in the past week.  We haven't updated the complete packages; just download the image and replace the one in the package you already have.  Thanks again to everyone who's been testing BYOB!

(If you're wondering, 001 and 002 weren't posted because we weren't sure they really worked.)