Per Pale Partition Midline Position Checker
Audit per-pale/per-fess split against envelope midline, not actual curved-shield area equality.
Description
Per-pale geometry concerns a vertical division across the field.
Per-pale geometry concerns a vertical division across the field.1
Comparing its measured x position with half the width gives a signed midline offset.
When to use Per Pale Partition Midline Position Checker
Use this tool to calculate or review the supplied observations under the stated rules. Establish the source tradition, viewing frame, coordinate units and independently annotated features.
How to use Per Pale Partition Midline Position Checker and understand its results
- Establish the source tradition, viewing frame, coordinate units and independently annotated features.
- Enter fieldWidth, observedSplitX, using the field meanings and rules below, then run the tool.
- Read result.signedMidlineOffset, using the output meanings and calculation rules below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| fieldWidth | Field width | number | Required |
| observedSplitX | Observed split x | number | Required |
Require positive field width and split x between zero and width, inclusive. Return split x minus half the field width.
signedMidlineOffset=splitX−fieldWidth/2 Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Calculated observation or reference | object |
| result.signedMidlineOffset | signed Midline Offset; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"fieldWidth": 100,
"observedSplitX": 50
},
"output": {
"result": {
"signedMidlineOffset": 0
}
}
}Limitations and assumptions
Zero means the measured split is centered under this rectangular model. No tolerance, edge contour or heraldic acceptance rule is added.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Per Fess Horizontal Split Position Checker: Per-fess geometry concerns a horizontal division across the field. For a complementary comparison, use Marshalling Impalement Left-Right Assigner: Heraldic dexter is the bearer's right, which appears on the viewer's left.
References
Similar or alternative tools
- Per Fess Horizontal Split Position Checker
Per-fess geometry concerns a horizontal division across the field.
- Marshalling Impalement Left-Right Assigner
Heraldic dexter is the bearer's right, which appears on the viewer's left.