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64 lines
2.8 KiB
64 lines
2.8 KiB
# svg2gcode
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[](https://codecov.io/gh/sameer/svg2gcode)
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Convert any SVG 1.1 path to gcode for a pen plotter, laser engraver, etc.
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## TODO
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- [x] Support all path variants
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- [x] Support group and path transforms
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- [ ] Biarc interpolation (G2/G3 instead of many G1)
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- [x] Px, pc, in to mm
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- [x] Configurable DPI for px/pc to mm
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- [ ] Sort paths by distance to reduce G0 distances
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- [x] Configurable start/end sequence
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- [ ] Comments in GCode input
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- [ ] Rustdocs
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- [ ] End-to-end tests
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## Known bugs & whether fixed
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- [ ] Smooth curves should not use the control point when the previous curve is not of the same type (quadratic -> smooth cubic, cubic -> smooth quadratic)
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- This is just a nit, it shouldn't matter if the SVG is correct
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- [x] Image coordinates mirrored in the y-axis because SVGs uses upper left corner as (0,0) while GCode uses lower left as (0,0)
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- [x] Close path command connects back to (0.0, 0.0) instead of the last move
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- [ ] Ellipse paths are dubious -- large_arc, sweep may need to be inverted
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## Demonstration
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### Input
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```bash
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cargo run --release -- examples/Vanderbilt_Commodores_logo.svg --off 'M4' --on 'M5' -o out.gcode
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```
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### Output, rendered at [https://ncviewer.com]()
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```bash
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cat out.gcode
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```
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## FAQ / Interesting details
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* Use a 3D printer for plotting: (thanks @jeevank for sharing this) https://medium.com/@urish/how-to-turn-your-3d-printer-into-a-plotter-in-one-hour-d6fe14559f1a
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* Convert a PDF to GCode: follow [this guide using Inkscape to convert a PDF to an SVG](https://en.wikipedia.org/wiki/Wikipedia:Graphics_Lab/Resources/PDF_conversion_to_SVG#Conversion_with_Inkscape), then use it with svg2gcode
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* Are shapes, fill patterns supported? All objects can be converted to paths in Inkscape with `Object to Path` for use with this program. Not sure how practical fill patterns would be -- if you have ideas, feel free to open as issue or a PR.
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* What about a generic PPD driver for using a plotter as a printer? I thought about doing something like this where you package ghostscript + inkscape + svg2gcode but that would take a lot of time
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## Reference Documents
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* [W3 SVG2 Specification](https://www.w3.org/TR/SVG/Overview.html)
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* [CSS absolute lengths](https://www.w3.org/TR/css-values/#absolute-lengths)
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* [CSS font-relative lengths](https://www.w3.org/TR/css-values/#font-relative-lengths)
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* [CSS compatible units](https://www.w3.org/TR/css-values/#compat)
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* [RepRap G-code](https://reprap.org/wiki/G-code)
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* [G-Code and M-Code Reference List for Milling](https://www.cnccookbook.com/g-code-m-code-reference-list-cnc-mills/)
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