Line/Parlel,XAxis,D
Horizontal Line at Y=D
Creates a horizontal line parallel to the X axis at Y=D. No selector needed.
What It Does
The Line/Parlel,XAxis,D operator creates a horizontal line parallel to the X axis at a specified Y distance D. The line extends infinitely in both X directions.
Syntax
Line/Parlel, XAxis, D
Quick Input
D: [Y coordinate of the horizontal line]
Direction Selector
No direction selector is required. The result is uniquely determined by the input geometry.
Worked Examples
Line/Parlel, XAxis, D=40
→ L0: horizontal line at Y=40
Line/Parlel, XAxis, D=0
→ L1: the X axis itself (Y=0)
Line/Parlel, XAxis, D=-25
→ L2: horizontal line at Y=-25 (below origin)
Analytic Rule
Horizontal line: Y = D (constant)
Slope = 0
Line equation: y = D
D is the signed perpendicular distance from the X axis.
Positive D: above the X axis.
Negative D: below the X axis.
Result: Exact. No ambiguity.
FAQ
What is the difference between Line/Parlel,XAxis,D and Line/Parlel,L,D?
Line/Parlel,XAxis,D creates a horizontal line at a fixed Y value — no selector needed. Line/Parlel,L,D creates a line parallel to any existing line at a distance D — selector required because two solutions exist.
Can D be zero?
Yes. D=0 creates a line coincident with the X axis.