Fences: And Hatching

Fences:

It can be used:

• As a void to exclude elements inside (or overlapping) the fence boundary.

• To clip elements that cross the fence boundary, so that only the parts inside the

fence boundary (or outside in the case of a void) are subject to manipulation.

Fences can be rectangular (referred to as a fence block), polygonal (non-rectangular, referred to as a fence shape, with as many as 5000 vertices), or circular (referred to as a fence circle). A fence shape can be derived from a previously placed shape element.

Fences are persistent in both 3D and 2D DGN files. You can place a fence, zoom in on the design and the fence will remain when you zoom back out.

Points:

An active point is used as a reference in the design plane. It can consist of a cell from the attached cell library, a text character, a symbol, or a line with no (zero) length (a “point” element).

Linear elements:

The tools in the Linear Elements toolbox are used to place linear elements.

Hatching and Patterning

Patterning is the repeated placement of a hatch line or cell through a closed area at a specified interval (spacing), scale, and angle. You can place patterns on any designated level.

When using a hatching or patterning tool with the tool setting Method set to Flood, Union, Intersection, or Difference, turning on Dynamic Area along with Associative Pattern lets you create patterns that regenerate themselves when their bounding elements are modified. As well, you can create single associative patterns with disjoint regions.

Cells

They are created from simple elements such as text, line, circle, arc and line string. These are the objects that form the elevation view symbol.

Cells are same as blocks in AutoCAD.