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Extend 3D line to an existing surface
Posted:
Thu Aug 11, 2011 8:02 pmby LThomas
Is there a way to extend a 3d line to meet an existing surface (.tin, grd, etc)? I am trying to draw my cut/fill slopes for a road job from the edge of my typical section to the existing surface.
Posted:
Thu Aug 11, 2011 8:31 pmby R Stillwell
The only way I have found to do it with out of the box Carlson is to extend the line at the slope I want it to be to a point beyond where I think it will intersect and then SURFBREAK command to have it break it at the surface.
If you are handy with VLisp. You can use their API to create a program that will do it. I've written one but I can't give it to you because it is the property of the company I work for. It can be done though.
I'm hoping that maybe the 2012 Carlson will have a better way of doing this. I can offset a 3D Polyline to intersect a surface in a matter of seconds with Offset3d. My custom program takes longer to find the intersection using their API. So I would think they could come up with something that would be a lot quicker than the options we currently have available.
Posted:
Fri Aug 12, 2011 5:27 amby Nava Ran
Define the slopes for cut anf fill in Design Template and get automatically the intersections with the surface.
Posted:
Fri Aug 12, 2011 12:34 pmby LThomas
Yes I understand how to use the Design Template, but occasionally it is necessary to add some detail in a radius or other special circumstance where it would be much quicker to just be able to project a single line or two to the surface if possible.
Posted:
Fri Aug 12, 2011 1:28 pmby Nava Ran
Try:
3D Data>3D Polyline Utilities>Break 3D Polyline by Surface
Posted:
Fri Aug 19, 2011 6:43 pmby TerryS
1. Use Offset 3d Polyline (command: offset3d) and choose the Surface option
2. Use Design Pad Template (command: pad)
Posted:
Mon Aug 22, 2011 1:30 pmby R Stillwell
TerryS wrote:1. Use Offset 3d Polyline (command: offset3d) and choose the Surface option
2. Use Design Pad Template (command: pad)
Those commands will not do what the poster wants them to do.
The OP wants to extend a 3DPolyline to a surface. Not offset the 3DPolyline.
I suppose one could draw a 3DPolyline perpendicular to the one to be extended and Offset3D that line. But that's a lot of steps to do something that shouldn't be much more difficult than using the Extend command.