60 lines
1.7 KiB
Markdown
60 lines
1.7 KiB
Markdown
PixelCanvas.io downloader
|
|
=========================
|
|
|
|
This utility lets you download the https://pixelcanvas.io bitmap and export regions of it to .png files.
|
|
|
|
## Requirements
|
|
|
|
pip install -r requirements.txt
|
|
|
|
## Usage
|
|
|
|
This tool is run from the command line, where you provide the coordinates you
|
|
want to download and render.
|
|
|
|
The format for typing coordinates is `UPPERLEFT--LOWERRIGHT`. The format for
|
|
each of those pieces is `X.Y`.
|
|
|
|
Sometimes, argparse gets confused by negative coordinates because it thinks
|
|
you're trying to provide another argument. Sorry.
|
|
If this happens, use a tilde `~` as the negative sign instead.
|
|
|
|
Remember, because this is an image, up and left are negative;
|
|
down and right are positive.
|
|
|
|
Commands:
|
|
|
|
- **update**: Download chunks into the database.
|
|
|
|
`> pixelcanvas.py update ~100.~100--100.100`
|
|
|
|
- **render**: Export a region as PNG.
|
|
|
|
`> pixelcanvas.py render 0.0--100.100 <flags>`
|
|
|
|
|
|
So, for example:
|
|
|
|
> pixelcanvas.py update 0.0--100.100
|
|
> pixelcanvas.py update ~100.~100--100.100
|
|
> pixelcanvas.py update ~1200.300--~900.600
|
|
|
|
> pixelcanvas.py render 0.0--100.100
|
|
> pixelcanvas.py render ~1200.300--~900.600 --show
|
|
> pixelcanvas.py render ~2000.2000--2000.2000 --scale 0.25
|
|
|
|
## To do
|
|
|
|
Here are some things we might like to improve:
|
|
|
|
- Some way to get a statistics overview or visual map of which chunks we have in the database, so we know what we're missing.
|
|
- Render the image as it appeared at some point in the past, taking advantage of the `updated_at` column.
|
|
- Probably never going to happen: A GUI application to browse the db just like the site.
|
|
|
|
## Mirrors
|
|
|
|
https://github.com/voussoir/pixelcanvasdl
|
|
|
|
https://gitlab.com/voussoir/pixelcanvasdl
|
|
|
|
https://codeberg.org/voussoir/pixelcanvasdl
|