okay, i figured out that the patch command is a reasonable way to make a site model from 3d points.  but, i am stumped on how to add surfaces to the model: roads, for example.  i thought is might be the drape command as in sketch up. but no. the only thing i've done suceesfully is to do a lot of copying, projecting, triming, etc, which seems like an awful lot of steps.

 

is there an efficient way to do this?

 

cheers,

 

ray

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Hi Ray- see RhinoTerrain.com... not cheap, but it is the way to do this stuff.

-Pascal

pascal@mcneel.com

thanks, pascal. i should have mentioned that i am using the mac beta version, for which rhino terrain is not available.

since i work primarily in vectorworks, i can actually do all of the terrain modeling and design there. but, i like to work parallel in other modeling progams to keep flexible. if anybody has suggestions about how to do site design, i'm intereted.

cheers,

ray

Good morning Ray,

I would try ship hull building methodology. Lay down your topographical contour lines as Rhino curves. Then use the Loft command to "drape" a surface over them. If you activate History with Loft and turn on the control points (F10) for the curves, then when you change the curves the surface changes with them.

For roads, you can draw them in plan (Top view) and use the Project (not ProjecttoCplane) to "drape" them on the surfaces of your topography. There are additional tools that might be helpful here that I am not an expert on, like, maybe the Persistentonsurface series. I'm not sure. But this might be a good, low cost, in house, work-around.

HTH,

Cosmas

thanks for the input cosmas. unfortunately my site topography include both open and close contours, so lofting of draping doesn't work. however, the patch tool does work with the contours, and seemingly better with the points extracted from the contours. not accurate, but close enough for concept studies and representation. this goes quickly.

applying surfaces to the resulting terrain surface is another story. i tried extruding, intersecting, and whatever else seemed plausible. ultimately the only way i could do it was a fair amount of copying surfaces, projecting curves, trimming surfaces. it looks pretty good, but take time

Hi Ray,

Rhino is such a powerful program that it would probably be easy to give it the capability to do site topography. They are always adding new tools and maybe your question will help inspire them to move in that direction.

I am a set designer and only occasionally have the need for topography, but I know that when the need is there it would be nice to be able to do it:)

it's probably just a matter of time, especially since rhino is increasingly popular among architects and landscape architects. rhino terrain is a step in that direction. and then in my case...porting everything to mac os.

cheers,

ray

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