Friday, September 24, 2010

POINT

Before going into Divide and Measure, let's first understand the concept of 'POINT'

Point objects are useful as nodes or reference geometry for object snaps and relative offsets.
You can set the style of the points and their size relative to the screen or in absolute units. Changing the style of points

• Makes them more visible and easier to differentiate from grid dots
• Affects the display of all point objects in the drawing
• Requires using REGEN to make the change visible

Draw menu: Point
Command line: point
Specify a point:
Points can act as nodes to which you can snap objects. You can specify a full three-dimensional location for a point. The current elevation is assumed if you omit the Z coordinate value.

The PDMODE and PDSIZE system variables control the appearance of point objects. PDMODE values 0, 2, 3, and 4 specify a figure to draw through the point. A value of 1specifies that nothing is displayed.



Specifying the value 32, 64, or 96 selects a shape to draw around the point, in addition to the figure drawn through it:

PDSIZE controls the size of the point figures, except for PDMODE values 0 and 1. A setting of 0 generates the point at 5 percent of the drawing area height. A positive PDSIZE value specifies an absolute size for the point figures. A negative value is interpreted as a percentage of the viewport size. The size of all points is recalculated when the drawing is regenerated.




After you change PDMODE and PDSIZE, the appearance of existing points changes the next time the drawing is regenerated.

Once we understood the concept of 'POINT' it would be easy to understand Divide and Measure. We will dicover them tomorrow. Stay tuned...!

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