1426 posts
Does anyone put something serious here?
Posted 20 May 2019 - 08:50 PM
One thing I've been working on for a little while now is revamping CC:Tweaked documentation situation. As part of that, I had the fantastic idea of "could we run CC:Tweaked in the browser?", allowing people to run code samples with a click of a button.
Now, at the time, I wasn't aware of EveryOS's fantastic Mimic fork, and so I did the only thing logical and went on a long yak shaving expedition. Presenting…
copy-cat: Another ComputerCraft emulator
As it's original aim was to be used for documentation, it aims to be as accurate and up-to-date as possible. In order to achieve this, copy-cat is built from a modified version of CC:Tweaked's source code - both the Lua VM and Java APIs behave exactly1 the same.
1. While we try to keep as close as we can, there are some elements which are impossible to emulate due to the restricted environment of a browser.
For instance, the http API has been almost entirely recreated, and some functionality (such as setting specific headers or requesting some sites) is not impossible. As with any emulator, there will be subtle differences in how input events (key presses, mouse clicks, etc…) are handled, so do not rely on our behavior.
While this is all well and good, that's not all copy-cat can do. There's all sorts of other fancy features, including:
One other thing worth mentioning is the ability to run arbitrary startup code via a query parameter. This allows you to create online demos of a program (assuming it doesn't require peripherals or turtles). For instance, why don't you try out mbs?
If you want to try this out yourself, it's just a base64 encoded string - ideally you'd just run your installer. I'm hoping to expand on this in the future (and make it more accessible), but it's a fun POC for now.
Now, at the time, I wasn't aware of EveryOS's fantastic Mimic fork, and so I did the only thing logical and went on a long yak shaving expedition. Presenting…
copy-cat: Another ComputerCraft emulator
As it's original aim was to be used for documentation, it aims to be as accurate and up-to-date as possible. In order to achieve this, copy-cat is built from a modified version of CC:Tweaked's source code - both the Lua VM and Java APIs behave exactly1 the same.
1. While we try to keep as close as we can, there are some elements which are impossible to emulate due to the restricted environment of a browser.
For instance, the http API has been almost entirely recreated, and some functionality (such as setting specific headers or requesting some sites) is not impossible. As with any emulator, there will be subtle differences in how input events (key presses, mouse clicks, etc…) are handled, so do not rely on our behavior.
While this is all well and good, that's not all copy-cat can do. There's all sorts of other fancy features, including:
- Built-in editor, with access to all of Monaco's goodness.
- Download the computer's file contents as a zip file. And then drag-and-drop that zip back into the file browser to open it again!
- Take screenshots and record gifs of the terminal.
- Access to all of ComputerCraft's settings. You can enable and disable Lua 5.1 support to your heart's content.
One other thing worth mentioning is the ability to run arbitrary startup code via a query parameter. This allows you to create online demos of a program (assuming it doesn't require peripherals or turtles). For instance, why don't you try out mbs?
If you want to try this out yourself, it's just a base64 encoded string - ideally you'd just run your installer. I'm hoping to expand on this in the future (and make it more accessible), but it's a fun POC for now.
Edited on 20 May 2019 - 06:51 PM
