Tag Archives: Polygonal chain

Architectural Technologist – Editing & Changing a polyline in a Vectorworks drawing

Vectorworks Viewer

Vectorworks Viewer (Photo credit: Scays)

Sometimes when I’m drawing I do things automatically, and I happen to be changing a polyline entity, not by pulling or pushing the vertices, but by simply removing the portion of the entity and re drawing it, then linking the bits back together with add surface. My client saw me doing it and asked for a quick video, this below is some of my efforts.

I have the river on a separate layer,  using navigation pallet  I showed the important layers in grey to aid navigation. All the river,paths and certain tributaries are classed making it so easy to just highlight the required items and work on them.

I can’t claim any time for this, but you might, by practicing the technique. If you have any problems I can show you live in a skype link or Google Hangout.

If you have any large garden that needs plotting, Vectorworks is very good at allowing you to layer the garden and show it off to it’s best, we also tag all trees and add our own search engine to Vectorworks, although we are now finding pdf printouts and the use of Goodreader, as just as effective.

 

 

 

 

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Architectural Technologist – Polyline or Polygon

Some different types of polygon

Image via Wikipedia

Whats the differennce between a polyline and a polygon, mathematically I just don’t know, I use polyline to enclose a space, so I can colour a space, get the area, for such things as paths, roads and the like. I use the polygon tool for straight lines and for the fill tool.

A polyline can be opened/closed by using the Show/Hide Edge mode of the 2d reshape tool or by advancing through the vertices with the OIP A polyline can be converted to a polygon via the Modify/Convert command. A polyline has the disadvantage, for some intents, of appearing closed when it is actually open. eg the extrude of an open poly does not have filled “top” or bottom. (ya gotta drag/undo each corner vertex until you find the open one – usually where you started) this happens more than I would like to remember.

A polyline can be smoothed or have its vertex count/spacing modified via commands and scripts. Polyline is also a ‘vector path‘ which other objects and procedures like animation and ExtrudeAlongPath can follow. The Polygon only has straight lines, but the Polyline tool allows you to introduce curves. You can also use the 2D Line tools and absolute positioning to create a set of guides. Then you can connect the dots with the Polygon tool.

When you hit the Polyline tool it introduces a preferences option in the Mode bar and six different modes for drawing, including very precise arcs and curves. You can switch modes in the midst of drawing by reaching into the Mode bar, what do I use, well Polyline mostly, when doing paths and curved surfaces, if its a square object then the Polygone,

To split or cut an enclosed space made by a polyline, use the square tool and make a rectangle across the area involved Select both the rectangle and the enclosed space and use the clip surface command, then join the two areas back up and use the reshape tool, and the hide or show edge tool to make the line disappear. To add areas together, highlight all the spaces, and as long as they overlap, it is a great way to link areas together.

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