Hi guys
Just wondering if anyone has any clever ways to make the process of manually drawing a boundary around a topo so that you can add it as a boundary in a C3D surface? Sometimes the topo's we recieve already has a boundary in it, but often, there is not. So we have to manually draw a polyline around the whole extent of the topo, which can take a long time.
Cheers
Martin
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Solved by AllenJessup. Go to Solution.
If "topo" means a _MAPIINSERTed raster image , you can explode it twice, getting the 4 borders of the frame.
If the boundary is "drawn" not regular inside the image, you could try to vectorize automatically with the free Wintopo.
By topo, I mean a topographical survey with 3D contours, breaklines, blocks etc. Its not an image.
The way that I do it is the way I've seen Sinc doing it in a video somewhere:
Create the EGL surface and show the border and triangles
Edit the triangles in concave areas, invalid areas etc etc so that the boundary reflects the area of interest
Extract the boundary and flatten to 2D
Edit the surface definition and remove all edits
Add the extracted boundary into the surface as Outer boundary
Add vertices to the newly added boundary to tweak any erroneous area that may have been missed.
neilyj (No connection with Autodesk other than using the products in the real world)
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I think this may be the video you're talking about:
http://www.quuxsoft.com/videos/AddBoundaryToSurface.aspx
Allen
Allen Jessup
CAD Manager - Designer
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Yes that's the video - main difference is I use a 2D boundary and proximity breakline but exactly the same principle.
Can't think of a quicker way to add an outer boundary with a drawing comprising 3D contours, breaklines, blocks etc...???
neilyj (No connection with Autodesk other than using the products in the real world)
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Have you tried the LINEWORKSHRINKWRAP command?
@Anonymous wrote:Have you tried the LINEWORKSHRINKWRAP command?
I've tried it with points. I got very messy results. If you made a copy of the surface and exploded it down to 3D faces it would work.
Allen
Allen Jessup
CAD Manager - Designer
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neilyj (No connection with Autodesk other than using the products in the real world)
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