Description
Return a drawing-grid point from supplied origin and spacings.
Artwork measurements distinguish physical dimensions, projected regions and scale conventions. Length, area and volume change with different powers of a scale, while frame overlaps and crop geometry depend on which boundaries were measured. A numerical fit does not identify an artwork or establish its historical interpretation.
Return a drawing-grid point from supplied origin and spacings.
When to use this tool
Use Drawing Grid Reference Origin when checking the stated artwork dimension, crop, frame or scale relation.
How to use the tool and how it works
- Enter column, row, spacingX, spacingY, originX, originY. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read x, y. Use the output convention below.
Return a drawing-grid point from supplied origin and spacings. Require positive spacingX/Y and whole row/column; x = originX+column*spacingX, y = originY+row*spacingY.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| column | Signed whole grid-column offset. | Required. Safe integer. |
| row | Signed whole grid-row offset. | Required. Safe integer. |
| spacingX | Spacing X | Required. Finite number; strictly above 0. |
| spacingY | Spacing Y | Required. Finite number; strictly above 0. |
| originX | Origin X | Required. Finite number. |
| originY | Origin Y | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| x | X | Required. Finite number. |
| y | Y | Required. Finite number. |
{
"input": {
"column": 3,
"row": 2,
"spacingX": 5,
"spacingY": 4,
"originX": 1,
"originY": 2
},
"output": {
"x": 16,
"y": 10
}
}Limitations and assumptions
- Negative row/column indexes are accepted; no frame extent, image calibration or actual drawing grid is inferred.
- 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 the original object, measured boundaries and appropriate complete geometry or catalog record for physical or historical conclusions.
References
Similar or alternative tools
- Drawing Exercise Negative Space Share
Return available and negative-space area shares.
- Perspective Exercise Measured Convergence Gap
Return top/bottom perspective-line separations and their difference.