Automating pattern adjustments based on measurement checks

[medha]

Hi everyone,

I have drafted an armhole, but I need to make sure the distance between r1 and s1 is at least 2″ (see attached picture), regardless of whose measurements I upload. Right now, I check this manually and then:

1. If the distance is less than 2″, I lower h1 by up to 0.5″.

2. If that’s still not enough, I raise the Line_q1_r1 line until the distance reaches 2″.

In manual drafting, this is easy to adjust, but in Seamly2D:

• r1 and s1 don’t exist when I first place h1, so I can’t check the distance ahead of time.

• Seamly2D formulas don’t allow conditional “if…then” logic or loops.

Is there a way in Seamly2D to set this up so the draft automatically adjusts until the Line_q1_r1 distance is at least 2″? Or do I have to handle this by manually tweaking h1 and/or Line_q1_r1?

Thanks in advance for any tips!

Medha

[Douglas]

@medha

Seamly2D formulas don’t allow conditional “if…then” logic or loops.

Yes it does. It uses the c++ style ternary operator:

condition ? expression_if_true : expression_if_false

So you can use something like:

measurement > 2 ? measurement : 2

Where it sets the result to a minimum of 2.

You can even nest conditions:

CurrentSize > BaseSize ? 0.25 : (CurrentSize < BaseSize ? -0.25 : 0)

Which would yield a result of 0.25, 0, or -0.25.

That being said there’s an easier way. If you never want the value to go below 2 use the max(arg1; arg2) function… where it will return the max value. If measurement is < 2, then 2 is the max.

max(measurement; 2)

Conversely if you never want a value to go over 2 then use the min(arg1; arg2) function:

min(measurement; 2)

[medha]

Thank you so much! I was able to come up with the formula (Line_n’1_q1>2?0:((2-Line_n’1_q1)<0.5?(2-Line_n’1_q1):0.5)) for the amount I need to lower the h1 point, and it works!