As part of my work on Kurt, it'd be really useful if I could mod Scratch so that when it opens a file, it automatically runs “clean up” on all the sprites, and then automatically saves the project.

I got as far as adding
to the end of Scratch-UI-Panes -> ScratchFrameMorph -> file read/write -> installNewProject:, which seems to clean up scripts for the stage, but it has the unfortunate side-effect of not showing any sprites in the sprites palette. And it'd be really good to do it for sprites as well.

If you know Squeak, could you show me how to do that? Thanks!

You should ideally make this a patch, because I doubt many people will install an entire Scratch mod just to use Kurt (though it would be really cool). LS97 would probably be the best person to ask, though from what I remember, you need to call “changed” or “refresh” on the World.

Sorry, to clarify: I don't actually want to distribute this, I just want to know how to modify my own copy of Scratch in this way, so that I can extract information from Scratch about the heights of each type of block. I'm not trying to make a Scratch mod that Kurt relies on; I'm just trying to get some information that I can use to build Kurt with.

…LS97?

blob8108 wrote:

Sorry, to clarify: I don't actually want to distribute this, I just want to know how to modify my own copy of Scratch in this way, so that I can extract information from Scratch about the heights of each type of block. I'm not trying to make a Scratch mod that Kurt relies on; I'm just trying to get some information that I can use to build Kurt with.

…LS97?

Ah, that's clever. Why don't you look into the actual code to render blocks?

(Or better: pester the ST to add an “cleanup”:true property to the project JSON? )

The code is complicated; I'm not very good at reading Squeak. I figure it's easier just to batch measure the heights of a load of different blocks, and use that to reverse-engineer an algorithm for calculating the height of a stack of blocks.

“cleanUpOnLoad”: true is the plan for Scratch 2.0, but I can't very well ask the ST to add new stuff to the 1.4 file format, now, can I?

blob8108 wrote:

The code is complicated; I'm not very good at reading Squeak. I figure it's easier just to batch measure the heights of a load of different blocks, and use that to reverse-engineer an algorithm for calculating the height of a stack of blocks.

How about taking a screenshot of the types of blocks (stack, reporter, boolean, c, if/else, and the margin between a text box input and the block) and measuring it by image processing? I know it's ugly, but it works…

“cleanUpOnLoad”: true is the plan for Scratch 2.0

Meh, analysing screenshots is more effort than learning Squeak.

blob8108 wrote:

Meh, analysing screenshots is more effort than learning Squeak.

Well, I found the height of a block + puzzle inset by hacking at Squeak, it's 24.

Scratch-Blocks -> BlockMorph -> drawing ->

Or you can just use the inspector…

I was going to automate the measuring of various combinations of blocks, such as inserting reporter blocks into other blocks, and use that to figure it out.

But if you can come up with a simple algorithm for the height of a block by reading the source, go for it!

You can assume the shape of each block is known (see kurt.readthedocs.org).

Why is LS97 the best person to ask?

LS97 wrote:

Why is LS97 the best person to ask?

You're the smartest Scratch hacker I know, and you've made an awesome mod. And you made the Scramble plugin for me a long time ago.

Hardmath123 wrote:

LS97 wrote:

Why is LS97 the best person to ask?

You're the smartest Scratch hacker I know, and you've made an awesome mod. And you made the Scramble plugin for me a long time ago.

Thank you for the compliments

Are you sure about Scramble? I don't even remotely remember

LS97 wrote:

Hardmath123 wrote:

LS97 wrote:

Why is LS97 the best person to ask?

You're the smartest Scratch hacker I know, and you've made an awesome mod. And you made the Scramble plugin for me a long time ago.

Thank you for the compliments

Are you sure about Scramble? I don't even remotely remember

you wrote this patch where you could right-click a script and get back corresponding Squeak for a custom block.

woah cool