Description
Return shell-minus-lining recess, recess-minus-target margin and protrudes when lining is longer.
A pattern's seam and closure dimensions combine finished lengths with allowances, overlaps and offsets. A local length budget describes an ideal construction; fabric thickness, movement and fitting can change the practical result.
Return shell-minus-lining recess, recess-minus-target margin and protrudes when lining is longer.
When to use this tool
Use Lining Drop Below Shell Gap when you need a local pattern, seam or closure dimension check.
How to use the tool and how it works
- Enter shellLength, liningLength, desiredRecess. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read actualRecess, margin, protrudes. Inspect protrudes before interpreting the associated values.
Require nonnegative shell/lining lengths and desired recess. Return shell-minus-lining recess, recess-minus-target margin and protrudes when lining is longer.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| shellLength | Shell Length | Required. Finite number; minimum 0. |
| liningLength | Lining Length | Required. Finite number; minimum 0. |
| desiredRecess | Desired Recess | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| actualRecess | Actual Recess | Required. Finite number. |
| margin | Signed allowance under the subtraction order above. | Required. Finite number. |
| protrudes | Protrudes | Required. Boolean. |
{
"input": {
"shellLength": 100,
"liningLength": 98,
"desiredRecess": 1
},
"output": {
"actualRecess": 2,
"margin": 1,
"protrudes": false
}
}Limitations and assumptions
- A negative recess indicates protrusion. No hem allowances, shrinkage, turn-of-cloth, posture or actual fit is assessed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check the complete pattern and make an appropriate sample in the intended material. Review seam construction, allowances, shrinkage and fitting rather than treating one margin as complete garment validation.
References
Similar or alternative tools
- Trouser Hem Cuff Turnup Budget
Return finished+2×cuffDepth+hemAllowance and the allowance total.
- Zipper Stop Seam Clearance
Return absolute zipper-stop/seam-position distance and distance-minus-required margin.