Sun/Shade Analysis with Civil 3D file

[windcommander]

Greetings!

Perhaps I am pushing the newbie thing too far. I recognize I'm pushing my skill level with SU, but here's the question.

I am trying to perform a sun/shade analysis using SU and I wish to render a file imported (DWG format) from Civil 3D. I believe I need to drape the rendered image over the imported surface, but so far I have not been successful. I created a simple surface and layout consisting of a rectangel with a proposed road in Civil 3D. A very simple file.

I import the drawing and render the grass/pavement using the paint bucket and then attempt to drape the objects over the 3D surface. I can get the grass to overlay, but not both.

Obviously the actual drawing I want to use is much more complex, so any pointers as to the process or what I am doing wrong would be greatly appreciated.

Thanks for assisting the perplexed newbie!

[remus]

I dont suppose you could post the file? it sounds like what your asking should be quite simple but my work addled brain is having trouble seeing it.

[windcommander]

I have uploaded the experimental file which has the imported surface. The surface displays beautifully and was quite easy to import. It's the rendering that is causing me grief.

Thanks for taking a look.

---

Test.skp

[remus]

ok, that makes a bit more sense now.

the first thing you need to do is turn your contour lines in to a surface, you can do this very easily using the sandbox tools (draw->sandbox->from contours)

If you then select the geometry you wan to drape over your terrain, go tools->sandbox->drape and then click the terrain you want to drape it on, and it should all work.

[windcommander]

My problem is that I seem to get the line work to drape, but not the rendering applied by paint bucket. For instance in this particular file, I apply vegetation to the outside and asphalt to the mini road using paint bucket. When I drape the objects, I get the vetetation applied to the entire surface, but only the road line work which appears to be grass.

My ultimate goal is to perform the study on a high school and incorporate parking areas, landscape islands and trees, proposed building, etc. I hope to render the 2D drawing and then add trees and push/pull the building. Then I hope to drape the rendering over the proposed surface and model for sun/shade. Does this sound like the correct process?

[Gaieus]

Note that we are talking about two completely different thing here. You can drape a linework (i.e. vectors) on a surface and (if you are lucky), this linework will correctly separate the faces intended to be separate (i.e. grass from road etc.).

You cannot drape a "render" (whatever you mean by this word but I guess, texture) onto multiple faces. One face (or surface in case of a curved thing) can only be painted with one texture of a time but also,if you have your "compound" texture containing all the roads, grass whatnot, the draped linework wond take the differences into account.

Now I may be totally wrong about what you are up to...

[remus]

To do the texture as well: select the flat path and the grass->right click->combine textures.

then right click the face->texture->projected. If you then sample the texture (paint bucket tool+alt), go in to the terrain group and paint the face.