CAD tip # 12543:

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CAD

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Drawing perpendiculars from any curve in AutoCAD.

With the freeware utility PerpFrom (PF) for AutoCAD you can conveniently draw perpendicular lines from their foot on any line or curve in your drawing.

Download the PerpFrom add-on from Download and load it into your AutoCAD with APPLOAD. You can then use this function in two modes - either as an interactive command PERPFROM (resp. PF) which dynamically previews the perpendicular direction (any you can just confirm it anytime), or as a transparent command 'PF, which can be invoked inside any other drawing command in AutoCAD, on the prompt "Specify next point:".

In the interactive PF command mode, the direction of the perpendiculars is previewed both "above" and "below" the curve, on which you hover your cursor. You can confirm the creation of the perpendicular line by clicking. Just confirm the direction or enter the line length.

In the transparent mode, the previously specified point must lay on a curve, at the foot of the perpendicular to be drawn:

Command: _LINE
Specify first point:
Specify next point or [Undo]: 'PF
"<103.36644358"
Angle Override: 103
Specify next point or [Undo]:

Video - how to use PF:

ACADCivilMapADTPlant

*CAD

22.3.2020 24634× FAQ

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applies to: AutoCAD · Civil 3D · AutoCAD Map 3D · AutoCAD Architecture · AutoCAD Plant 3D ·

See also:
Tip 14499:	How to place Revit families exactly on a terrain surface (elevation, orientation)?
Tip 14088:	3 methods of creating true rectangles in AutoCAD.
Tip 13944:	Intersection of a 3D spline with a plane in Fusion 360.
Tip 13788:	Green square - mathematical charade and parametric constraints in AutoCAD.
Tip 13064:	How do I measure or enter distances along a curve in Fusion 360?

Selected tip: Editing selected segments of a polyline.

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