Grading from one object to another object

[jeremy2012]

I have 2 polylines, which are at two different elevations, and I would like to make a grade from one to the other over the distance of the polyline. How do I go about doing that?

[SLW210]

I moved this to the Civil 3D & LDD forum for you.

[bill_borec]

There are a number of ways to accomplish this, assuming I understand your post...

 

1. Assign/Add the polylines as breaklines in a new surface. Build the surface.

 

2. Assign points (w/ elevation) to the ends of the polylines. Add points to a new surface. Build surface.

 

Does that answer your question? If not, can you give more info? Maybe post the .dwg w/ the polylines? or a sketch of what you have and what you want to end up with...

[Emigrato]

Easier alternative: set SURFTAB1 to 50, then perform _RULESURF between the two elevated plines.

 

[jeremy2012]

Yes that is exactly what I needed. Emigrato, how would I go about creating a surface from this mesh layer. I am going to eventually make a profile but I can't because I can't generate a surface from that grade since it's not a true 'grading'.

 

 

They are actually feature lines, not polylines.

[Emigrato]

how would I go about creating a surface from this mesh layer

You should explode the _RULESURF mesh, then you add those 3Dfaces (remained after explosion) to the surface definition.

 

[sinc]

If I understand your question correctly, then what you really want in the Civil world is to create a Corridor with targets, since we really work in a 2.5D paradigm vs. a true-3D paradigm.

 

And if you really want to end up with a "Profile", which is in the 2.5D paradigm, then I'm not sure WHAT you'll end up with... More details would need to be involved to give you a real answer. But in general, meshes are not useful when it comes to C3D. There are instances where 3D-Faces can give you an approximation of what you want, but they definitely won't deliver a Profile. So in some cases you can get what you want built, but if you intend on providing a GOOD set of construction plans, it won't work at all.