(2024-10-01, 20:26)Roland Melkert Wrote: I'm not entirely sure what the problem is your encountering, but this should be fairly easy to do using the LDCad path tool.
It would just need some extra guidance (bezier) points and or curve tweaking to force the overall length to match one of the existing parts.
a short tutorial can be found here:
https://www.melkert.net/LDCad/docs/advEdit
The example uses Pneumatic hoses but it can be any of the templates, you'll probably need the (HQ) "rigid hose 3mm" or "technic flex system hose" one.
Yeah, I'm also not quite clear what the question is…are you just trying to measure the required length of hose, or are you trying to match it to an existing, "official" length of part? (Note that in some official sets, it was necessary to hand-cut your own length from the provided supply, so even a custom length could be considered "official".)
Either way, in LDCad you can set different units for the display length—mm, studs ("L"), LDU, etc.—from the Path tab in the properties dialog (the one that comes up when you hit Enter with nothing selected in the flexible part's editing session). If you want even more precision, you can find the length in the generated code in the .ldr text file itself and adjust it using incremental changes to bezier lengths, but that gets to be a tedious sequence of change, save, reload, repeat…I know because I do it myself. ;-)