Description
Return tactile line-end clearance against a supplied boundary.
Accessibility-related records can describe visible time, available formats, label text or supplied requirements. A count or budget can expose local gaps without establishing usable content, valid accommodations or compliance with a standard.
Return tactile line-end clearance against a supplied boundary.
When to use this tool
Use Tactile Line End Clearance when checking an explicit accessibility record, time or layout convention.
How to use the tool and how it works
- Enter lineEnd, boundary, requiredGap. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read measuredGap, margin. Use the output convention below.
Return tactile line-end clearance against a supplied boundary. Require requiredGap >= 0; measuredGap = boundary-lineEnd, margin = measuredGap-requiredGap, in one length unit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| lineEnd | Line End | Required. Finite number. |
| boundary | Boundary | Required. Finite number. |
| requiredGap | Required Gap | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| measuredGap | Measured Gap | Required. Finite number. |
| margin | Signed margin on the stated comparison; inspect its sign and boundary convention. | Required. Finite number. |
{
"input": {
"lineEnd": 90,
"boundary": 100,
"requiredGap": 5
},
"output": {
"measuredGap": 10,
"margin": 5
}
}Limitations and assumptions
- Negative clearance is retained; no tactile-design standard or accessible layout is certified.
- 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
Use the applicable accessibility guidance, real content and user evaluation for practical adequacy; establish any legal requirement separately.
References
Similar or alternative tools
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