Use-Snap-Modes-in-Arithmetic-Expressions-CAL-Command

Use Snap Modes in Arithmetic Expressions (CAL Command)

Use Snap Modes in Arithmetic Expressions (CAL Command)

You can use Snap modes as parts of arithmetic expressions. The program prompts you
to select an object and returns the coordinate of the appropriate snap point. Using
arithmetic expressions with Snap modes greatly simplifies entering coordinates relative
to other objects.

When you use these Snap modes, enter only the three-character name. For example, when
you use the Center Snap mode, enter cen. CAL Snap modes set the value of the LASTPOINT system variable.

CAL Snap modes

Abbreviation

Snap mode

END

ENDPOINT

INS

INSERT

INT

INTERSECTION

MID

MIDPOINT

CEN

CENTER

NEA

NEAREST

NOD

NODE

QUA

QUADRANT

PER

PERPENDICULAR

TAN

TANGENT

The following example uses the Center and Endpoint Snap modes in a CAL expression:

(cen+end)/2

CAL prompts for a circle or arc and an object. It then determines the midpoint between
the center of the circle or arc and the end of the selected object.

Using the Midpoint Snap mode, in the following example CAL prompts for an object and
returns a point 1 unit in the Y direction from the midpoint of the selected object:

mid+[,1]

The following example uses the Endpoint Snap mode to calculate the centroid of a triangle
defined by three endpoints:

(end+end+end)/3

Learning AutoCad

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