lucianocefet wrote:

Thanks for the post, it helped me a lot
And it really gets easier to understand, I'm electrified, lol
warning, google translated, may not be entirely accurate

JGames101 wrote:

I have managed to port one of my extension to Scratch 3 (the blocks don't completely work yet, but I'm working on that, but they do load)

I followed the instructions to download the latest version of the scratch gui to work on it. I then copied the example extension, and rewrote my notifications extension in that format. Then, I uploaded it to github. I found the file that controls the list of extensions in the extensions button, and added mine. I set the URL to my github file, and it loaded in, and as you can see, the blocks appeared.

Official instructions for developing Scratch 3 extensions will be coming sometime between now and August (Scratch 3 release), according to The FAQ.

Update: I have everything working, except asking for notification permission. For some reason, that doesn't work.
Code can be found at https://github.com/JGames101/scratch-extensions/blob/master/notifications/3.js

To test your extension, add it to the index.js file located here: https://github.com/LLK/scratch-gui/tree/develop/src/lib/libraries/extensions
You can use actual URLs.
Then, if you open the page, you should see an extra Extension under the extensions popup thing. Clicking it will add your extension to the project, and you can test it.

So… testing your extensions currently requires downloading the source for scratch 3's GUI. No parts, like the VM or Renderer, are needed to be changed to test extensions, despite where default scratch extensions are stored (I went through the process of forking the VM for nothing…)

I will be making some simple demo extensions, that you'll be able to see below, and then I'll publish a fork of Scratch-GUI with some sample extensions.

NitroCipher wrote:

JGames101 wrote:

I have managed to port one of my extension to Scratch 3 (the blocks don't completely work yet, but I'm working on that, but they do load)

I followed the instructions to download the latest version of the scratch gui to work on it. I then copied the example extension, and rewrote my notifications extension in that format. Then, I uploaded it to github. I found the file that controls the list of extensions in the extensions button, and added mine. I set the URL to my github file, and it loaded in, and as you can see, the blocks appeared.

Official instructions for developing Scratch 3 extensions will be coming sometime between now and August (Scratch 3 release), according to The FAQ.

Update: I have everything working, except asking for notification permission. For some reason, that doesn't work.
Code can be found at https://github.com/JGames101/scratch-extensions/blob/master/notifications/3.js

To test your extension, add it to the index.js file located here: https://github.com/LLK/scratch-gui/tree/develop/src/lib/libraries/extensions
You can use actual URLs.
Then, if you open the page, you should see an extra Extension under the extensions popup thing. Clicking it will add your extension to the project, and you can test it.

So… testing your extensions currently requires downloading the source for scratch 3's GUI. No parts, like the VM or Renderer, are needed to be changed to test extensions, despite where default scratch extensions are stored (I went through the process of forking the VM for nothing…)

I will be making some simple demo extensions, that you'll be able to see below, and then I'll publish a fork of Scratch-GUI with some sample extensions.

I was trying to modify the pen extension and I added my own custom url, but when I try to pull up the page (nitrocipher.github.io/scratch-gui/develop) it does seem to recognize the changes I made to index.js

I know you got this to work, so i am wondering if i just somehow missed a step or something

discoverypark wrote:

How about if you could make your own extensions? (in scratch 3.0)

FlinxtheCat wrote:

discoverypark wrote:

How about if you could make your own extensions? (in scratch 3.0)

Yay that would be cool,but it will cost a lot of work to do for them.

My Scartch Profile

JGames101 wrote:

FlinxtheCat wrote:

discoverypark wrote:

How about if you could make your own extensions? (in scratch 3.0)

Yay that would be cool,but it will cost a lot of work to do for them.

My Scartch Profile

JavaScript can be run from extensions, so it is a possibility… it depends on where the code is run, and how open the system is. I'll look into it.

ScratchDiogoh wrote:

Hello!

NitroCipher wrote:

ScratchDiogoh wrote:

Hello!

The Scratch Team is working on implementing the Lego WeDo along with Mindstorms EV3, and Lego Boost. This is a topic discussing the new 3.0 extension format, please do not blockspam

FrankWine wrote:

Hi all,
I'm new in this discussion. I'm a teacher at middle school in Italy. I'm really interested in creating a new open Scratch 3.0 extension for Arduino.
I usually teach in coding classes for children from 11 to 15 (using Scratch) and last time I created a modified extension for Arduino from mBlock.
I'd like to have a simple basic Arduino Extension where I could write and add all the blocks I need (sensors, motors, lights, etc.). I'm a programmer too.

I've already read all the FAQ about Scratch 3.0 project, but no sign about Arduino. I know that most of ScratchX will be ported into 3.0 but I'd like to know if there's something going on about Arduino.

Thank you.
Francesco

NitroCipher wrote:

FrankWine wrote:

Hi all,
I'm new in this discussion. I'm a teacher at middle school in Italy. I'm really interested in creating a new open Scratch 3.0 extension for Arduino.
I usually teach in coding classes for children from 11 to 15 (using Scratch) and last time I created a modified extension for Arduino from mBlock.
I'd like to have a simple basic Arduino Extension where I could write and add all the blocks I need (sensors, motors, lights, etc.). I'm a programmer too.

I've already read all the FAQ about Scratch 3.0 project, but no sign about Arduino. I know that most of ScratchX will be ported into 3.0 but I'd like to know if there's something going on about Arduino.

Thank you.
Francesco

Hey Frank, thanks for the question. Scratch 3.0 isn't readily open for extensions at the moment (and 3.0 is a bit unstable), so for right now I would recommend sticking with ScratchX for arduino use. I would love to see an arduino extension made with 3.0 in mind, but that is still probably a while away. I am in the extremely early stages of writing a program to convert extensions from 2.0 to 3.0, and I will try to keep this thread updated about that.

JGames101 wrote:

Oh wow, extensions have changed a lot.
I guess that's why they recommend to not use pre-release software too much…

I was trying to create another basic extension in Scratch 3, just using the speech synthesis api to say whatever you enter, but I ran into a lot of problems.
First problem: After copying the example extension, and writing my extension, I went over to set the extensionURL for my extension, but discovered something that shocked me to my core…
extensionURL has become extensionId!!!!!
So I replaced the pen extension with my new one to make my life easier. Then, I realized…
The extension format has completely changed.
Well, quite a bit, anyway.

So… the basic way that it now works is that we have a class. This class has a constructor to setup the extension, a “getInfo” function to return whatever information for the extension (similar to how it was defined before), and then any functions for the blocks. You need to use require() to import some things for it to work. It doesn't sound that big, and it shouldn't be too hard to port from the older format, but still, It's pretty different.

Here's the new format (with the new google translate extension).

I'm getting weird errors right now, to do with event dispatches needing to be strings in a completely different file… but I'll update if I get any breakthroughs.