kridhond wrote:Nice!! That looks right!
I am working on an instruction of geometric preconditions for an average foot. With these formulas the model would build a last which can be used to make shoes you can actually wear and walk with. For example the tip of the last should be cleared from the ground depending on heel rise and length of the last. If you don't respect these "rules" you end up with shoes impossible to walk with.
We have already lots of Formulas and metrics collected, which we have not been published in this thread so far, because at this point of time it wouldn't be really interesting for other members. One of the next steps is to bring these metrics into action and see where we are really landing up. Up to now, it's more a testing about what could be done and how. From my first experience from this project is, that it would not be too difficult to add the important metrics for the shoe related measurements. The important part would be to see how FreeCad reacts on the "not" defined points or how it's interpolate them. At the very beginning of this thread we have already cut some ribs out of a demo-last with the Part Cross-Section tool, in different ankles and after manual adjusting these ribs, I have made a sweep and the result was very close to the original last in the forefeet, really great, but quite lousy at the heel area, in fact not usable at all. So, the final result will not so much depend on the 10-20 points, which we like to confirm and declare on the final shoe last, it depends more on the other 99.9% of points. Let's just see what happens once all the formulas and metrics are included.
I have quite less doubt, that somehow we will get a reasonable result and with reasonable I mean that it will certainly looks like a shoe last , but would it be for the beginning exactly the shoe last we have "thought" off is the still the big question mark? How much more manual work and tweaking must be done after the loft or "blow" is the real big question for myself. I guess we just need to wait and see.