@teocruz105 wrote:
I'm using DRAPE to create a mesh from curve level. the Mesh looks great.
Some notes:
1)
The mesh LOOKS (perhaps) good, but its surface is far away from the level curves (as shown in >>this video<<. (and a lot of others). Is this accuracy really good enough for you or for your further purposes?
2)
I doubt the correctness of the level curves. In the video I show where two curves at different Z-leves cross each other. That never can be correct.
3)
I don't know DRAPE, but obviously it creates a triangulated mesh as result. I don't know a way to convert it into a smoothed solid automatically.
Did you try what I suggested in the other thread? What doesn't work for you (" the issue is not solved yet.")? I know it is a lot of manually work. But if you want it to do more comfortable, the plain AutoCAD seems to be the wrong software.
Jürgen Palme
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The attached dwg shows the result after "smoothing" the (example) solid which you posted above. I used the method which was suggested in my older post. The upper face is a smoothed NURBS surface without triangular faces. (You find the surface at the layer "New_surface").
>>the lines extracted from that solid will lead to a solid with the same impefections<<
Did you
...
* join the lines of the upper contoure to a polyline
* Smooth the polyline (pedit -> spline)
... ?
If you now create a lofted surface using this smooth polylines you get a smooth surface.
But I am with you: >>AutoCad Plain is not the most appropriate softwere for this specific work<<
Jürgen Palme
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The fact that you plan to export the final model as an STL file somewhat negates the need for a smooth surface as an STL file will have tessellated any smooth surfaces.
As an experiment I imported the AutoCAD solid model into 3ds Max and applied a turbosmooth modifier. Here's how it looks in Max.
And then converted it to a .dwg file in Max. Here's how it looks back in AutoCAD. It's a mesh surface which would require using surfsculp to convert it to a solid.
Q. Did they add drape to Autocad ? I thought that was an ACA only command.
The steps below would give you a smoother solid than drape to mass to solid. I would recommend you start with drape as a tool to generate the profiles needed for a surface network. There might be ways to speed the process along but this will give you an outline. I've attached a sample file and stl file.
1. Use drape if available. If not. you can trim, break contours along a grid and draw profile splines
2. Cut sections at reasonable spacing and leave in place
3. Isolate each profile and retrace the top (surface) with spline.
4. Repeat steps for other direction.
5. Network a surface from the splines
6. Make a solid as a cube of the extent.
7. Use slice and the surface to trim the solid.
As reply to your (PM)request:
In >>this video<< you can see in detailed steps what I did.
HTH
Jürgen Palme
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@teocruz105 wrote:
The smooth surface
>>The surface looks very well. The only thing is that it won't thicken.<<
Thicken works well, but only with small values. With higher values you will get a self overlapping volume, this is not allowed and not possible in AutoCAD.
>>Here<< my suggestion to get a solid with a smoothed upper surface.
If my reply solves your problem, click the "accept as solution" button. This can help others find solutions faster
Jürgen Palme
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Is this what you are looking for?
(Be aware: the terrain are two solids - one around the buildings and a second underneath the buildings).
I converted the buildings into a solid too. If you don't need that, you can use your block instead.
Jürgen Palme
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@Anonymous wrote:
reduce the thickness of the terrain to minimum.
What do you mean? Which "minimum"? Do you mean a terrain with a constant thickness (similar as the result of an offset)? If yes, which value do you need or wish for the thickness?
Or do you need the "box" with a smaller height. This can you do yourself: create a plane at the wished z-value, the yx-dimension greater than the terrain and slice the volume which you don't need.
Attached an improved version where the complete terrain is ONE solid.
Jürgen Palme
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If you want or need you can do >>this<< of course on another Z-value. Move the Planesurf along the Z-axis where you want.
(BTW: To reduce the height of the terrain box will not reduce the file size significantly)
Please mark "Accept as Solution" if my reply resolves the issue or answers your question, to help others in the community.
Jürgen Palme
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