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Because parameters and points are mutually descriptive of unique locations, they can be converted back and forth.

(vlax-curve-getDistAtParam ObjName (vlax-curve-getendparam ObjName))Ĭopied the following from Stig Madsen's tutorial:Ĭommand: (vlax-curve-getEndParam objline)įrom this follows that the length of a line can always be found by simply retrieving the end parameter. The following statement seemed to work on a few basic entities in a quick check: To get the length of a line, extract the endpoint coordinates from the "Entity data", then use the "distance" lisp function.Ģ. Then the length is stored in the PERIMETER system variable. Knowing the "name" of a *polyline* entity (call it 'ObjName'), query it with the "area" command. There are a few ways to get the length of lines and polylines.ġ.