Description
Locate a baseline-grid line from its origin, spacing and line index.
Print and screen geometry depends on coordinate scale, placed image size, bleed/inset definitions and pixel transparency. Placed pixels per inch differs from printer dots per inch, and a caller-chosen margin differs from a verified production tolerance. Empty-image conventions and threshold equality affect bounding results.
Locate a baseline-grid line from its origin, spacing and line index.
When to use this tool
Use Baseline Grid Line Offset when checking the stated artwork geometry, placement, screen angle or alpha-bound convention.
How to use the tool and how it works
- Enter origin, lineIndex, gridSpacing. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read baselinePosition. Use the output convention below.
Require signed safe whole lineIndex and gridSpacing>0. Return origin+lineIndex*spacing.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| origin | Origin | Required. Finite number. |
| lineIndex | Line Index | Required. Safe integer. |
| gridSpacing | Grid Spacing | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| baselinePosition | Baseline Position | Required. Finite number. |
{
"input": {
"origin": 10,
"lineIndex": 3,
"gridSpacing": 12
},
"output": {
"baselinePosition": 46
}
}Limitations and assumptions
- A negative index is allowed; the tool does not lay out text, measure a font baseline or choose a suitable grid.
- 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
Inspect rendered artwork and verified production/device specifications for actual print quality, cropping, fit and manufacturing requirements.
References
Similar or alternative tools
- Foil Stamp Line Gap Reference Check
Compare a foil-stamping line gap with a caller-supplied minimum.
- Print Spine Width Offset
Calculate a print-spine width after adding a supplied width adjustment.