Scratch

Open the BYOB folder, open BYOB, click on projects(in the folder), and open functions. The factorial is there.

Last edited by The-Whiz (2009-10-05 19:15:46)

DarthPickley wrote:

you need to update it for scratch 1.4 now jens! we're bound to get all sorts of new functions now, especially with the point towards (variable) and stuff... this will be so much fun!

Yes, it would be great!

Can you upload projects made with this onto the site?

The-Whiz wrote:

Open the BYOB folder, open BYOB, click on projects(in the folder), and open functions. The factorial is there.

Thanks!!!

Jens wrote:

So, you want to define your own procedures and functions in Scratch? Build your own blocks (BYOB    )?

You might as well try this new experimental prototype I have been developing over the last weeks. You can download and read through an overview (pdf), or download the whole application (including the overview) and start playing with it right away.

This prototype lets you build your own custom blocks in Scratch using the standard Scratch blocks, as well as other blocks you defined elsewhere. You can create your own command blocks (procedures) and reporter blocks (functions), both regular ("round") and boolean ("diamond"). You can specify for each block to be atomic (run at the speed of a single block) or interleafed. Your custom blocks are defined for each sprite and can be shared among projects together with the sprite they were created for. Oh, and you can even use a block within itself (recursion).

This prototype is very, very, experimental, so be prepared to encounter lots of bugs. I'd be very interested in feedback about your experiences and insights.

Enjoy!
-Jens

Hi Jens,
I have downloaded BYOB, it is amazing indeed but it is not exactly making your own blocks, I think it is kinda more like grouping blocks? 

Hallo jens,  ich bin voll verwirrt, ich habe ein PC, ich habe es gedownloaded und in scratch projects gemoved, aber jetz weiss ich nicht was zu tun, wenn du mir helfen koenntest wirde ich echt froh sein, Pinochio

Hi icecool44,

It's great that you're interested in defining your own - even recursive - procedures using BYOB. When you download BYOB you'll find a subfolder with sample projects. One of these samples - I believe it's the one named 'polygons' also does the "triangle within triangles" trick (it's called a Sierpinsky fractal). If you enounter any problems or have any more questions, please don't hesitate to ask!

Hi icecool44,

At the top of the first script there is a block that hides the sprite. If you want to see the sprite while it is drawing the polygons, replace the "hide" block with a "show" block. Now if you press the green flag you'll see the (cat) sprite.

However, if you want to watch how it actually draws the polygons you will also need to edit the custom block called "polygon..." (right click on any instance of that block and select "edit") and unmark the checkbox called "atomic". Afterwards (accept the changes by clicking on "ok" in the block editor) you'll be able to watch the cat draw those polygons, but it will take longer, because the procedures are now being executed interleafed and not "at once".

Unfortunately you cannot turn a custom block parameter into a watcher on the stage. So, if you would like to monitor the changing values of parameters it's probably best to let the sprite "say" those parameters while it is executing the block.

Hope this helps, please keep asking if I did not make myself clear or if this doesn't work for you.

Thanks a lot

Jens wrote:

Yes, the new BYOB version can open and import both formats. You will be able to import regular Scratch sprites/projects into existing BYOB projects

Wonderful, thanks!

Jens wrote:

... and vice versa.

Quite intrigued by that. Any chance the Scratch team will allow publishing/sharing of BYOB projects via their web facilities? I think BYOB opens up some new possibilities for reusable sprites.

- Sophie

fullmoon wrote:

Doesn't "BYOB" stand for "Bring Your Own Beer"? Other than that, I am blown away! I'm supposed to be writing a Scratch presentation for school, but instead I think I'll spend the rest of the day playing with this  . Thank you!!!

It is 'Build Your Own Blocks' in this case.

1675 wrote:

can you please add drop down menus (like [blocks]<touching[ [/blocks] to byob and add byob to scratch 1.5

That would be rather complicated... I suppose that you could have them interpreted as strings. Also, I highly doubt that BYOB will show up in 1.5... remember that the target age for scratch is 7+.