Scratch

sweetgames wrote:

Noah1991 wrote:

Hi, I'm using Ubuntu Linux 9.04 and every time I try to save after activating Mesh it freezes and I have to force quit Scratch! Any ideas? 

The same thing is happening to me, except I'm using Mac snow leopard.

How are you saving Mesh?

Ace-of-Spades wrote:

If they leave Mesh on, and save changes before they quit, it becomes weird. You have to revert Scratch back to normal before shutting it down, or don't save to not mess up the Program.

If you save as it says in the topic post ("save image for end-user"), it works. Yeah, I tested it... 

Last edited by Jonathanpb (2010-07-22 02:22:49)

Wow! Cool I'm going to try this!

pheasant49 wrote:

i cant get the option to accept to come up, all i get is a few circles to change the size and locatio of the browser window. i am using a mac. HELP!

That sounds like you're Alt-clicking... you're supposed to Shift-click. 

Wait - is there a difference with this stuff for Windows and Mac? I use Windows, and don't really know anything about Macs. 

Here's the first post converted to Mac:

Jonathanpb wrote:

Mesh is a way of making different Scratch programs interact - even if they're on different computers.


Contents
How to get Mesh
How to host and join Mesh sessions
How to program with Mesh features


How to get Mesh

The easy way: Download Jens's Build your own blocks - it comes with Mesh, available nice and easily.
The hard way: You edit Scratch's System Browser to make Mesh available. Here's how (it's a bit complicated, so there are pictures):

1. Shift-click the R in the Scratch logo.



2. Select "turn fill screen off".
3. You will now have a white area at the bottom and right side of the screen. Click on the white area and select "open...".
4. Now select "browser".
5. Now you've opened the System Browser! In this place you can edit Scratch (see here for more stuff with the System Browser). Anyway: Go to Scratch-UI-Panes - ScratchFrameMorph - menu/button actions - addServerCommandsTo: .



6. Look down, and edit the "t2 ← true" to "t2 ← false".



7. option-click and select "accept".
8. Enter in your initials and click "accept".
9. Exit the System Browser.
10. Shift-click the R and select "turn fill screen on".

If you don't want to go through the process every time you want to use Mesh, you can save the System Browser so Mesh will stay available - Shift-click the R again and select "save image for end-user".

If you don't want Mesh anymore, just change the 'false' back to 'true'.


How to host and join Mesh sessions

A Scratch program that has Mesh available on it looks just like the un-edited Scratch program. But - what happens if you Shift-click Share?



Ooh! Mesh stuff!
• Host Mesh lets you host a Mesh session.
• Join Mesh lets you join a Mesh session.

To host a Mesh session:
1. Click Host Mesh.
2. Done! Your IP address will show up - you'll see why in a bit.

To join a Mesh session:
1. Click Join Mesh.
2. Enter in the IP address of the computer that is hosting the Mesh session.

What if you want to join a Mesh session, but the person hosting the Mesh session forgot to tell you the IP address, and he/she forgot what the IP address is? He/she Shift-clicks the Share button and selects "Show IP address". The IP address will pop up like before.

A Mesh session can have more than two Scratch programs connected at once.


How to program with Mesh features

Programming things with Mesh is (almost) the same as with the ordinary Scratch program - after all, if you're not in a Mesh session it's the same, right? But when you're in a Mesh session, things get slightly different:
• Broadcasts are received on all Scratch programs.
• You can use each other's variables.

If you create a new broadcast on one Scratch program, it won't be made in the other. You have to make the broadcast on both Scratch programs.

To use variables from other Scratch programs, you don't find them at the Variables section - instead, you have to use the ([ ] sensor value) block. It's near the bottom in Sensing. To use it, simply select the variable from the drop-down menu - in a Mesh session, the variables from all connected Scratch programs will appear on the drop-down menu!

That's all that's different with programming in Mesh - program projects the same way, but design it for multiple people, and don't forget the broadcasts and variables!


Hope this helps you - and have fun with Mesh!
Jonathanpb

wow, I only had to change 1 word!

Last edited by ScratchReallyROCKS (2010-07-28 13:37:59)

gnk2200 wrote:

I still don't get it. Do you build a mesh block? I've never used BYOB before. Which file do I use? Can you give me a walk-through?

Mesh has nothing to do with BYOB - this topic is pretty much a walkthrough. Read through the first post and if you still don't understand, reply back here and somebody will explain it in further detail 

gnk2200 wrote:

I still don't get it. I downloaded BYOB like it says to,  but still can't get Mesh. Help?

You don't get the mesh from it, you just use it.

I still don't get it. I downloaded BYOB like you're supposed to, I shift clicked share like you're supposed to, and it's STILL NOT WORKING!!! Please. someone help me!

gnk2200 wrote:

I still don't get it. I downloaded BYOB like you're supposed to, I shift clicked share like you're supposed to, and it's STILL NOT WORKING!!! Please. someone help me!

When you're in BYOB, click the share menu (you don't have to shift click) and there will be three options in the menu: Compile Project, Host Mesh, and Join Mesh. Click on Host Mesh to host a mesh connection, and click on Join Mesh to join one.

murpho wrote:

This helped a little. But i still dont get it

What is the part you don't get?

I got it working!!!!! I did it the hard way and now it works!!!! I have a question though. Does the other person need your project if you want your project to be multiplayer?

gnk2200 wrote:

I got it working!!!!! I did it the hard way and now it works!!!! I have a question though. Does the other person need your project if you want your project to be multiplayer?

Yes - otherwise only one person would be controlling it.

murpho wrote:

Is there certain blocks you have to use and how would i make it so like there are to characters and the other person on a different cumputer controls him

Yes - use the ([ ] sensor value) block to use other computers' variables (they must be connected through Mesh), and use the broadcast blocks as normal to send messages through to other computers.

Last edited by Jonathanpb (2010-07-29 21:46:38)