Function Entry: VLAX-CURVE-GETCLOSESTPOINTTOPROJECTION

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Function Entry: VLAX-CURVE-GETCLOSESTPOINTTOPROJECTION

Name

vlax-curve-getClosestPointToProjection

Class

Visual LISP curve function

Syntax

(vlax-curve-getClosestPointToProjection curve point normal [extend])

Arguments and Values

curve — VLA-object designating a curve.
point — 3D point list in WCS.
normal — 3D normal vector in WCS.
extend — optional generalized boolean requesting search on the extended curve.

Description

Returns the closest point in WCS on a curve after projecting the curve onto a plane.

Return Values

3D point list or nil

Notes

Autodesk documents that the curve is projected onto the plane through point with normal normal, then the nearest point is found and mapped back to the original curve.

Side Effects

None.

Availability

AutoCAD 2026: documented (per Autodesk reference page).
BricsCAD V26: presumed compatible (no contradicting page found).
Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.

Source Notes

[vlax-curve-getClosestPointToProjection (AutoLISP/ActiveX)](https://help.autodesk.com/cloudhelp/2023/ENU/AutoCAD-AutoLISP-Reference/files/GUID-23A1B8CE-9FF5-482C-AF32-3EE48784B905.htm)

Compatibility

Available only on Windows; not available on macOS or Web.