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FAQ

When should I use XLarge vs YLarge in XyzPilot?

Use the selector on the axis where the two solutions differ. Horizontal lines use XLarge/XSmall. Vertical lines use YLarge/YSmall.

Full Answer

The key rule: use the selector on the axis where the two solutions differ.

SituationUseWhy
Horizontal line intersects circleXLarge / XSmallBoth intersections at same Y — differ in X
Vertical line intersects circleYLarge / YSmallBoth intersections at same X — differ in Y
Angled line intersects circleEither — use axis with more separationBoth X and Y differ
Parallel line offset (horizontal)YLarge / YSmallOffset is perpendicular — differs in Y
Common mistake: Using XLarge/XSmall when both intersections have the same X coordinate. This produces no distinction. Always check which axis separates the two solutions.

XyzPilot Example

Horizontal line L0 at Y=50, Circle C0 centre(75,50) r=25: Both intersections at Y=50 — differ in X XLarge → (100,50) XSmall → (50,50) Vertical line L1 at X=10, Circle C0 centre(0,0) r=20: Both intersections at X=10 — differ in Y YLarge → (10,17.32) YSmall → (10,-17.32)

Relevant Operators

Point/Intof,L,C

Line Circle Intersection

Requires direction selector.
Point/Intof,C,C

Circle Circle Intersection

Requires direction selector.
Line/Parlel,L,D

Parallel Line at Distance

Requires direction selector.

Also See

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