Hi everyone,
I’m working on a pattern and need a solution for positioning. My goal is to have a blue guide line and ensure that another line, identified as A (It’s diagonal), is always positioned directly above the blue line without going over it—even when its size changes.
Does anyone know of a tool, function, or technique that can achieve this behavior automatically? Any help or suggestions would be greatly appreciated.
Thanks in advance!
Hi @dulceberry Welcome to Seamly!
I’m afraid I don’t understand the context of your question.
Maybe a picture would help. Or a brief explanation with the pertinent file(s).
Sorry I couldn’t give better advice yet.
Hello and welcome to the Seamly forum, @dulceberry
I agree with @Pneumarian that it’s very difficult to image what you’re doing. The only suggestion that I can give is to first create a line that connects to the blue guide line from the point that your measurement will come from and to put in a conditional formula to always either be the length of this or shorter, according to the measurement used. Something like: measurement>current_length?(current_length-0.5):measurement. The minus 0.5 is the preferred distance from the blue line that you’d like the new line to stop at.
Hi! I’m new to the forum, and for now I don’t have the option to upload images or share links. I’m currently working on drafting my basic bodice block, and I have a question regarding the shoulder slope.
The instructions I’m following say to go down 4 cm from the starting point and draw a horizontal line at a right angle. This line represents the shoulder drop height and also serves as a guideline.
Then, it states that the shoulder length should be 12 cm, and that this line should be placed so that it lies exactly on the previously drawn guideline. The issue is that when I try to draw a straight 12 cm line from the neckline outward, it doesn’t align with the guideline — it ends up falling below it.
When I do it on paper, the way I solve it is by rotating the measuring tape until the 12 cm mark touches the guideline, which allows me to find the correct angle. However, I don’t know how to do this in the software.
Could anyone guide me on how to do this correctly so that the 12 cm shoulder line sits exactly on the shoulder slope line?
Hello! I’m new to the forum, and for now I don’t have the option to upload images or share links. I’m currently working on drafting my basic bodice block, and I have a question regarding the shoulder slope.
The instructions I’m following say to go down 4 cm from the starting point and draw a horizontal line at a right angle. This line represents the shoulder drop height and also serves as a guideline.
Then, it states that the shoulder length should be 12 cm, and that this line should be placed so that it lies exactly on the previously drawn guideline. The issue is that when I try to draw a straight 12 cm line from the neckline outward, it doesn’t align with the guideline — it ends up falling below it.
When I do it on paper, the way I solve it is by rotating the measuring tape until the 12 cm mark touches the guideline, which allows me to find the correct angle. However, I don’t know how to do this in the software.
Could anyone guide me on how to do this correctly so that the 12 cm shoulder line sits exactly on the shoulder slope line?
I don’t speak English, so maybe what I’m saying isn’t very clear. Thank you anyway for your interest! 
I think this is what you are trying to do.
Line_A_A1 is 4cm at 270 degs. Line_A1_A2 is an arbritrary length > 12 cm at 0 degs (blue dash). Using the Point - Intersect Arc and Line tool
Point A3: The line is Line_A1_A2, the center point of the arc is A, and the radius is 12 cm.
Using the Line tool I added the Line_A_A3 (pink solid)
For clarity I added the dotted green arc with a radius of 12 cm as the Intersect Arc and LIne tool does not (currently) display the arc.
Any change in the length of Line_A_A1 wil still produce a 12 cm lenght of Line_A_A3:
Thanks! That was a great description! Douglas’s answer just above should be exactly what you were looking for.
There’s also the “shoulder” tool, but that has a quirk if not used correctly so I suggested the Intersect Arc and Line.
It worked! Thank you very much, it was very easy to understand 
