Creation of 3D Polylines from Objects.

FlashMNT allows you to use Lines and 2D Polylines to create a triangulation. However, it is preferable to use only 3D Polylines so you can use all the 3D Polylines tools of FlashMNT. This tool allows you to transform Arcs, Lines (2D and 3D) and 2D Polylines ("heavy" polyline or LWPOLYLINE (cf. AutoCAD manual)) into 3D Polylines. The 3D Polyline is created in the layer of your choice with the elevation of the initial 2D Polyline, or in the case of a line, with the Z of the extreme points, and in the case of an arc with the Z of the center. Do not confuse this tool with the Projection of Objects on a DTM tool.

Layer for the Creation of 3D Polylines

• Layer : Enter the name of the layer for the creation of the 3D Polylines or click on to choose from a list.
  

Maximal chord/arc distance

• Maximal chord/arc distance for the curves : The arcs and polylines containing arcs will be represented in 3D by a succession of straight segments approximating the curve. Enter a value representing the maximal chord/arc distance (distance from the center of the straight segment to the arc) that is authorized.
  

Adjust the parameters of the dialog box, then click on OK. FlashMNT then displays on the command line :

>> Select the Lines, Arcs and 2D Polylines :

Select the desired objects then validate. The 3D Polylines are created in the layer of your choice.

Remarks : None.