how to reduce the scope of optimize_path_order

[ErwanMAS]

My workflow :

1. i use inkscape to design my svg , and this contains multiple layers .
2. After i generate a gcode with svg2gcode with the option --newline-before-comment true and --extra-attribute-name label to add some extra information in the comment
3. i use multiple sed command , to change the feedrate/spindle speed in only some sections ( i use the layer label as a marker )

This was working well , because svg2code was keeping the same order , that the svg order .

Now we have a new option --optimize-path-order, that will change the order because optimizing the travel path .

This new option is good ( i want to use it ) , but break my current personal workflow .

A solution for me will be to have the ability to filter the svg , so i my final gcode will be the result of the concatenation of 2 executions of svg2gcode , this is requested by others ( #57 ) .

A another solution will be to have the ability to limit the scope of --optimize-path-order , for example do the reordering inside each Gcontainer of level 1 .

@sameer some ideas ?

[sameer]

Thanks for sharing your workflow, and that was fast! I just merged this today 😄

Filter support would be ideal and has been on my to-do list. My plan was to support this via CSS selectors -- what do you think?

[ErwanMAS]

I am not familiar with CSS selectors .

I suppose i will able to create a filter to match a specific layer name , and the opposite filter that does not match this layer name .

[ErwanMAS]

CSS selectors is ok if we implement not() from https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/:not

[sameer]

Yeah not() should be available

[ErwanMAS]

ok i am ready to test

[sameer]

It's available in bc7d67f as a CLI option but I did not release it / make a PR yet.

Let me know if you need any help building it

[ErwanMAS]

The following SVG is made with Inksacpe , with 3 layers .
And i was able to test CSS selectors .

--selector-filter ':is(svg g[label="Corner"] *)' was used to select all elements from the layer Corner

For my simple use case , the css selector is working .

Thank you a lot .

[sameer]

Done in #106