Line/Parlel,YAxis,D
Vertical Line at X=D
Creates a vertical line parallel to the Y axis at X=D. No selector needed.
What It Does
The Line/Parlel,YAxis,D operator creates a vertical line parallel to the Y axis at a specified X distance D.
Syntax
Line/Parlel, YAxis, D
Quick Input
D: [X coordinate of the vertical line]
Direction Selector
No direction selector is required. The result is uniquely determined by the input geometry.
Worked Examples
Line/Parlel, YAxis, D=60
→ L0: vertical line at X=60
Line/Parlel, YAxis, D=0
→ L1: the Y axis itself (X=0)
Line/Parlel, YAxis, D=-40
→ L2: vertical line at X=-40 (left of origin)
Analytic Rule
Vertical line: X = D (constant)
Undefined slope (infinite)
Line equation: x = D
D is the signed perpendicular distance from the Y axis.
Positive D: to the right of the Y axis.
Negative D: to the left of the Y axis.
Result: Exact. No ambiguity.
FAQ
Can I use a vertical line as input to other operators?
Yes. Vertical lines (X=D) are fully supported as inputs to all operators that accept line references — intersections, tangencies, parallel offsets, etc.
What is the slope of a vertical line?
Vertical lines have undefined slope (infinite). XyzPilot handles this correctly in all operators.