Line Command in AutoCAD

LINE: A line is specified by giving its two endpoints. The LINE command can be used to draw a single line or a series of lines with the end-point of one being the start point of the next. When a series of such lines is created, each line is treated as a separate entity. To create a closed polygon, the user has to type in C (close option) for the to point: prompt. This causes the last and the first points to be joined by a line and thus creating a closed boundary.

Methods Used in AutoCAD to Draw Line Diagram

• Absolute Co-ordinate Method
• Relative Co-ordinate Method
• Relative polar coordinate method
• Object Snap Method

(A) Absolute coordinate method:

In the absolute coordinate method, the points are located with respect to the origin (0, 0). The syntax is X, Y.

To draw a line diagram using Absolute Coordinate Method, follow the steps mentioned below. (It works in Older Version)

• Command: LIMITS (Enter)
• Specify lower left corner or [ON/OFF]: (Enter)
• Specify upper right corner: 120, 90 (Enter)
• Command: ZOOM (Enter)
• Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window]: ALL (Enter)
• Command: LINE (Enter)
• Specify first point: 20, 20 (Enter)
• Specify next point or [Undo]: 100, 20 (Enter)
• Specify next point or [Undo]: 100, 50 (Enter)
• Specify next point or [Close/Undo]: 90, 50 (Enter)
• Specify next point or [Close/Undo]: 85, 65 (Enter)
• Specify next point or [Close/Undo]: 75, 65 (Enter)
• Specify next point or [Close/Undo]: 70, 50 (Enter)
• Specify next point or [Close/Undo]: 50, 50 (Enter)
• Specify next point or [Close/Undo]: 50, 65 (Enter)
• Specify next point or [Close/Undo]: 30, 65 (Enter)
• Specify next point or [Close/Undo]: 30, 50 (Enter)
• Specify next point or [Close/Undo]: 20, 50 (Enter)
• Specify next point or [Close/Undo]: C (Enter)  

         SEE THE DRAWING HERE

(B) Relative coordinate method:

In the relative coordinate method, the displacement along the X and Y axis are measured with reference to the previous point. The syntax is @X, Y.

To draw a line diagram using Relative Coordinate Method, follow the steps mentioned below.

• Command: LIMITS (Enter)
• Specify lower left corner or [ON/OFF]: (Enter)
• Specify upper right corner: 120, 90 (Enter)
• Command: ZOOM (Enter)
• Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window]: ALL (Enter)
• Command: LINE (Enter)
• Specify first point: 20, 20 (Enter)
• Specify next point or [Undo): @80, 0 (Enter)
• Specify next point or [Undo]: @0, 30 (Enter)
• Specify next point or [Close/Undo]: @-10, 0 (Enter)
• Specify next point or [Close/Undo): @-5, 15 (Enter)
• Specify next point or [Close/Undo]: @-10, 0 (Enter)
• Specify next point or [Close/Undo]: @-5,-15 (Enter)
• Specify next point or [Close/Undo]: @-20, 0 (Enter)
• Specify next point or [Close/Undo]: @0, 15 (Enter)
• Specify next point or [Close/Undo): @-20, 0 (Enter)
• Specify next point or [Close/Undo]: @0,-15 (Enter)
• Specify next point or [Close/Undo]: @-10, 0 (Enter)
• Specify next point or [Close/Undo]: C (Enter)

(C) Relative polar coordinate method:

In the relative polar coordinate method a point is located by defining the direct distance of the point from current point and the angle that the direct distance makes with the positive X-axis in counterclockwise direction. Its syntax is @direct distance < angle.

To draw a line diagram using Polar Coordinate Method, follow the steps mentioned below.

• Command: LIMITS (Enter)
• Specify lower left corner or [ON/OFF]: (Enter)
• Specify upper right corner: 120, 90 (Enter)
• Command: ZOOM (Enter)
• Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window]: ALL (Enter)
• Command: LINE (Enter)
• Specify first point: 20, 20 (Enter)
• Specify next point or [Undo]: @80<0 (Enter)
• Specify next point or [Undo]: @30<90 (Enter)
• Specify next point or [Close/Undo]: @10<180 (Enter)
• Specify next point or [Close/Undo]: @15<108 (Enter)
• Specify next point or [Close/Undo]: @10<180 (Enter)
• Specify next point or [Close/Undo]: @15<252 (Enter)
• Specify next point or [Close/Undo]: @20<180 (Enter)
• Specify next point or [Close/Undo]: @14.27<90 (Enter)
• Specify next point or [Close/Undo]: @20<180 (Enter)
• Specify next point or [Close/Undo]: @14.27<270 (Enter)
• Specify next point or [Close/Undo]: @10.73<180 (Enter)
• Specify next point or [Close/Undo]: C (Enter)

(D) Object Snap Method:

To draw a line diagram using Object-Snap (Osnap) Method, follow the steps mentioned below.

• Command: LIMITS (Enter)
• Specify lower left corner or [ON/OFF]: (Enter)
• Specify upper right corner: 120, 90 (Enter)
• Command: ZOOM (Enter)
• Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window]: ALL (Enter
• Command: LINE (Enter)
• Specify first point: 20, 20 (Enter)
• Specify next point or [Undo): @80<0 (Enter)
• Specify next point or [Undo): @45<90 (Enter)
• Specify next point or [Close/Undo]: @80<180 (Enter)
• Specify next point or [Close/Undo]: C (Enter)
• Press F3 key to Switch ON “OSNAP” if it is OFF
• Command: LINE (Enter)
• Specify first point: (Get Mouse Near To P5 and CLICK When MIDPOINT magnet gets ON)
• Specify next point or [Undo]: (Get Mouse Near To P6 and CLICK When MIDPOINT magnet gets ON) Specify next point or [Undo]: (Enter)
• Command: LINE (Enter)
• Specify first point: (Get Mouse Near To P7 and CLICK When MIDPOINT magnet gets ON)
• Specify next point or [Undo]: (Get Mouse Near To P8 and CLICK When MIDPOINT magnet gets ON) Specify next point or [Undo]: (Enter)
•  Command: LINE (Enter)
• Specify first point: (Get Mouse Near To P1 and CLICK When ENDPOINT magnet gets ON) Specify next point or [Undo]: (Get Mouse Near To P3 and CLICK When ENDPOINT magnet gets ON) Specify next point or [Undo]: (Enter)
•  Command: LINE (Enter)
• Specify first point: (Get Mouse Near To P2 and CLICK When ENDPOINT magnet gets ON) Specify next point or [Undo]: (Get Mouse Near To P4 and CLICK When ENDPOINT magnet gets ON) Specify next point or [Undo]: (Enter)