Construction Lines (2025 SP3)

You can use the AM_CONSTLINES command to provide a comprehensive solution for creating construction lines in drawings.

Construction lines are reference guides that help align, position, and lay out objects during the design process. This simplifies complex design tasks, improves accuracy, and enhances workflow efficiency. It offers multiple types of construction lines including rays, xlines, and circular lines.

Construction lines let you:
  • Create lines extending to infinity in one or both directions or circular construction lines for referencing curved geometries.
  • Snap to key points (for example, intersections or midpoints) to ensure accurate placement of objects.
  • Automatically place construction lines on a dedicated layer (AM_CL) that you can customize, lock, and freeze for better management.
  • Reduce manual calculations and drawing adjustments by providing advanced configurations like bisectors, perpendicular lines, and concentric circles.

The commands used with the construction lines are:

Command Description
AM_CONSTLINES Lets you select the type of construction line.
AM_CONSTSWI Turns ray mode on or off.
AM_CONSTSWI_XLINE Turns ray mode off.

Construction lines extend to infinity in both directions.
AM_CONSTSWI_RAY Turns ray mode on.

Construction lines extend to infinity in one direction only.
AM_ERASECL Erases selected construction lines.
AM_ERASEALLCL Erases all construction lines.
AM_CLINEL Locks or unlocks the construction line layer.
AM_CLINEO Freezes or thaws construction line layers.
AM_CONSTHOR Creates a horizontal construction line.
AM_CONSTHW Creates a construction line through a point by specifying an angle relative to an apparent line.
AM_CONSTLOT Creates a construction line that is perpendicular to a specified line.
AM_CONSTCC Creates a circular construction line that is concentric to the selected circle or arc.
AM_CONST_CIRCLE Creates a circular construction line.
AM_CONSTVER Creates a vertical construction line.
AM_CONSTPAR Creates a construction line parallel to the existing line at a specified distance from the selected line.
AM_CONSTHM Creates a construction line that bisects an angle.
AM_CONSTCCREA Creates a circular construction line to represent the top view of a shaft or hole.
AM_CONSTCIRCLI Creates a rectangular construction line around a circle.
AM_CONSTCRS Creates a construction line cross.
AM_CONSTPAR2 Creates a construction line parallel to an existing line and bisects the distance between the selected line and a specified point.
AM_CONSTTAN Creates two parallel construction lines tangent to a specified circle.
AM_CONSTC2 Creates a circular construction line that uses a specified line as a tangent.
AM_CONSTXRAY Creates construction lines starting from one point and extending to infinity in one direction.
AM_CONSTHB Creates a construction line by specifying two points or a point and an angle.
AM_CONSTLOT2 Creates a construction line through a specified point that is perpendicular to a direction.
AM_CONSTTC Creates construction lines that are tangent to two specified circles.
AM_CONSTK Creates a construction line that is tangent to two specified lines or circles.
AM_CONSTXLINE Creates a construction line through a point, which extends to infinity in both directions.
AM_CONSTZ Creates a construction line in the Z-direction.