Adding turtle blocks

[Ivan]

Is there a way to add turtle blocks inside blockly?

[Neil Fraser]

Sure, here are the instructions for adding custom blocks:

https://developers.google.com/blockly/guides/create-custom-blocks/overview

We don't offer a set of movement blocks as standard since there are so many different possible variants.  Some applications want north/south/east/west movement, some want up/down/left/right movement, some want forward/backward/left/right movement, some want absolute x/y movement, some want relative x/y movement.  And within each group, some want constrained magnitudes (e.g. 1 step, 90 degrees), whereas others want unconstrained magnitudes (e.g. 4.2 steps, 22 degrees).  Some applications want computed magnitudes, others want simple built-in fields.

This is why we don't provide turtle blocks, but instead allow developers to create their own.  For reference, you might want to look at Blockly Games Turtle:

  https://blockly.games/turtle

Note that even here there's a change in that levels 1-9 have constrained magnitudes, whereas level 10 has unconstrained computed magnitudes.

On Tue, 10 Aug 2021 at 12:52, Ivan <gargo...@gmail.com> wrote:

Is there a way to add turtle blocks inside blockly?

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Neil Fraser
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[Ivan]

Thank you.

[Ivan]

But is there a way to implement some predefined turtle blocks? For example, to implement turtle blocks from blockly games?

[Beka Westberg]

Sure thing! Blockly games is open source (just like Blockly itself!) so you can grab the block definitions and block-code generators from here.

Best wishes,

Beka

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[Ivan]

Im getting error "goog is not defined". What im doing wrong?

BRr,

Ivan

[Beka Westberg]

Hello,

Those goog.X calls are something used by the closure compiler, which is something BlocklyGames uses for type checking and minification. If you just want the block definitions and block-code generators, you don't need to copy those lines =)

Best wishes,

Beka 

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[Ivan]

I tried removing those. But now error says "turtle is not defined".

Best regards,

Ivan

[Beka Westberg]

Hello again Ivan :D

Could you paste the full text of the error? Without seeing the stack trace it's tricky to know where the issue is coming from.

Best wishes,

Beka

[Ivan]

Hello Beka,

Really appreciate your help. Here are some screenshots. Bassically what I did. I copied turtle code without goog.require. Make a js file inside blocks and paste code there. Then in index.html I call turtle_move block. But i get error in picture.

Thank once again,

Ivan

[Beka Westberg]

Hello,

I believe the problem is your first console error: "BlocklyGames is not defined" Because this error is thrown when the interpreter encounters a top-level construct, that means that the rest of the file is not getting interpreted and your blocks are not getting defined. Removing the line `BlocklyGames.NAME = 'turtle'` and any other references to BlocklyGames should fix your problem =)

Best wishes,

Beka

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