Page 317 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Break, offset, trim, chamfer, copy, explode
commands (Modify commands)

Rectangle (REC) (Fig 1)
To create a rectangle you must specify two diagonal corners or Length and Width.
The rectangle can be any size and the sides are always drawn horizontal and vertical.

A Rectangle is one object (Poly line) , not four separate lines.

Fig 1

Explode (D)

Separates a Polygon, block, dimension or hatch pattern into its constituent entities or makes a polyline into a series
of straight lines. In the case of a block that is exploded, if it was originally drawn on the 0 layer, it returns to that
layer, regardless of the layer it was inserted on, and it loses its referential connection to the original block. In the
case of a dimension or hatch pattern that has been exploded, their parts go back to the 0 layer, and are assigned
the logical color (BYBLOCK) regardless of the layer they were drawn on. In the case of an exploded polyline, it
loses any width it had.
Circle (C)

Draws a circle of any size. The default method is to pick a center point and pick a point on the radius or type the
radius dimension, but other methods can be selected.
2P Specifies circle by picking 2 points on the diameter 3P Specifies circle by picking 3 points through which the
circle will pass D Allows entering the diameter
dimension instead of radius dimension TTR Specifies circle by picking two lines, arcs or circles for the circle to be
tangent to, and entering the dimension of the radius <RET> Enters radius of circle (the default)

Polygon
Draws regular polygons with a specified number of sides. Polygons are Polyline entities.

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CITS : Engineering Drawing (Mechanical) - Exercise 12