laukejas Posted November 27, 2012 Share Posted November 27, 2012 Hello again, I'm trying to loft two 3d Polylines and some splines into Solid. It should be very simple, I have two closed polylines above each other (planar), and two splines that connect two points on each of these polylines. I loft, select polylines as cross sections, and select splines as guides. However, the resulting shape is somehow weird, and goes out of boundaries. I'm attaching my project file, please try lofting these two 3d Polylines using splines as guides, and you'll see what I mean. How do I make final Solid to stay in boundaries of splines? I would very much appreciate any help, I'm stuck here for hours. 24.dwg Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 27, 2012 Share Posted November 27, 2012 What is it supposed to be? I have something but I'm not sure what the heck I'm looking at so I don't know if it is right. Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 27, 2012 Share Posted November 27, 2012 My feeble attempt. I give up. I have other things to work on. Good luck. Quote Link to comment Share on other sites More sharing options...
laukejas Posted November 27, 2012 Author Share Posted November 27, 2012 It's supposed to be a keel of a sailboat. More precisely, half of it. Attaching image it generated by other program. Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 27, 2012 Share Posted November 27, 2012 Then I believe mine is wrong. Quote Link to comment Share on other sites More sharing options...
laukejas Posted November 27, 2012 Author Share Posted November 27, 2012 Can't tell from the screenshot, but I guess it's wrong. Something similar happens to me. It should result in the shape I uploaded in my previous post, the red one. Quote Link to comment Share on other sites More sharing options...
JD Mather Posted November 27, 2012 Share Posted November 27, 2012 Your spline has too many points and your polylines should be splines. Quote Link to comment Share on other sites More sharing options...
laukejas Posted November 28, 2012 Author Share Posted November 28, 2012 Could you please tell more? How many is too many? Quote Link to comment Share on other sites More sharing options...
JD Mather Posted November 28, 2012 Share Posted November 28, 2012 The best curve is only two points with the software interpolating the curve between. I'm not really familiar with AutoCAD anymore - but check the Curves tab in the Surface environment in the 3D Modeling workspace. In Autodesk Inventor I created two points and than manipulated the point handles to get this curve. The entire subject gets more involved than can be covered in an online forum - you just need to experiment to pick it up on your own. This image looks pixelated - but that is just my monitor screen capture, the curve is smooth. Quote Link to comment Share on other sites More sharing options...
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