[Screenshot] Placing a point on the end of a line in Rhino?

I have 3 points all on the same spot (bound by rhino).

One point has a circle with radius 4 ft.

One point has a circle with radius 8 ft.

One point has a downward (z axis) line going 48 in down.

I'm trying to place the 8 ft circle (and the point) on the bottom of the 48 in line, but there is no way I have found to 'snap' a point in rhino or grasshopper to the end of the line? I'm used to autocad where everything has an 'endpoint' snap so I'm like wtf.

Attachments:

line_points.png, 214 KB

Replies to This Discussion

Permalink Reply by Luis Fraguada on May 20, 2012 at 2:57am

you could do it a few diff ways. to get the end point of the line, use Curve > Analysis > End Points.

another way would be to make a new pt with a z value equal to the length of the downward line

yet another is to make a vector and move the point downwards...

Permalink Reply by Luke W on May 20, 2012 at 3:34am

thank you Luis!
the first solution worked great.

I don't understand why 'end point of a curve' works for a line though? How is a line a curve?

It does work (screenshot) I just don't understand how.

Permalink Reply by David Rutten on May 20, 2012 at 4:26am

A Line is a special kind of curve. So is an Arc, a Circle, an Ellipse, a Polyline or even a Nurbs curve. Any component that deals with curves can handle all of the aforementioned types.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Luke W on May 20, 2012 at 4:02am

well I watched a rhino video and the guy said that a line can be a curve, a rectangle can be a curve, a circle, etc in rhino so i guess they redefined 'curve' to mean shape in this software

Permalink Reply by Luis Fraguada on May 20, 2012 at 4:18am

Luke, Rhinoceros is based on a set of basic topological concepts. Points, Curves, Breps, and Meshes. Maybe there are others, but these are the base types that everything else is based on. I feel it is much clearer geometrically than say 'shape.' A shape can be a trimmed surface, a closed polyline, a collection of mesh faces. By describing something as a shape we know very little of the underlying geometry that goes into making it. Maybe I just have adopted the way Rhino and GH deal with it, but I think it is very straightforward.

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