Double lanes with balancers not available as an option

[derekbassett]

One of the patterns of Mining I've seen used with Factorio is a double lane with a balancer at each mining input. This allows additional throughput through the belts. I have forked this project and reading through the code to see if I can understand how to add double lanes. Let me know if this is something I could provide a PR to add.

[rimbas]

Sure, hopefully my code isn't too much of a bother to understand.

To start off, bump the mod version number to "1.7.12" so migration runs (clears GUI). You can look at layouts/pipe.lua to see how you can just deepcopy an existing layout and just change params and tick functions. And then register it in algorithm.lua file with require_layout. You might need to run

/c __mining-patch-planner__ game.player.gui.screen.mpp_settings_frame.destroy()

to see gui changes specifically in the layout dropdown.

If you're running in debug mode with VSode FMTK extension it will route errors through pcall and enable some debugging tools. Like left-clicking once without a selected resource will re-plan on last selection.
Since this is mostly a control lua stage mod you can stay in game and just spam /c game.reload_mods() in console to get live changes.

For double lane implementation you can deepcopy simple layout, change relevant name and restriction fields, copypaste _placement_attempt into there and change to do two tile step between belts, override prepare_belt_layout function.

[derekbassett]

Thank you!