Parallel / Perpendicular Offset

Offset a station along P1→P2 by a signed perpendicular distance. Left is positive when walking P1 to P2.

Construction & Trades

Offset a station along P1→P2 by a signed perpendicular distance. Left is positive when walking P1 to P2.

App id: GEOM-08. Reference version 1.0.

How to fill it

Fill the inputs. The tool shows the outputs.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

P = P1 + t(P2−P1) + offset × (−dy, dx)/|P2−P1|

Inputs

Name	Unit
X1	`ft`
Y1	`ft`
X2	`ft`
Y2	`ft`
Offset	`ft`
Station from P1	`ft`

Outputs

Name	Unit
X (hero result)	`ft`
Y	`ft`

Diagnose

This tool does not attach diagnose observations.

Provenance

Straight segment only. Negative offset flips the side.