To become proficient with Seamly2d/Valentina I have been following Gillian Holman’s book Pattern Making Made Easy, and have tried to re-create each of her blocks as closely as I can.
It has been an interesting exercise, and I thought that I was doing rather well until I attempted the final block - trousers (pants).
Here is what I’ve achieved:
Holman_trousers.val (16.7 KB)
Holman_trousers.vit (1.4 KB)
The final instruction in the book reads: Check the inside leg front and back are of equal length.
In my drawing this means curves F8_F18 and F17_F24, the former being slightly longer. Although the difference in length is only marginal (just under 5 mm), it would be rather satisfying if the program could be made to carry out a correction automatically.
I have considered the work-around suggested by slspencer in Walking Patterns but still feel I would like to take it one stage further. To avoid upsetting the geometry of the whole back leg piece by inserting a short additional curve with a length calculated to represent the difference in length of the two inside leg curves, I wondered if it might be possible to instruct the program to set the ‘angle of curve’ at F24 so that the ‘length of curve’ would be equal to F8_F18. Currently, I have arbitrarily set the angle at 315 degrees, simply because it looks about right.
I’m not clever enough to write a formula to achieve this, even supposing that it is possible, but if anyone has already managed to do it I would be so, so grateful to learn the secret. Such a technique might well have other uses in the program.