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Carrara F.A.Q (Last Updated: 2024 Nov 28 3:44 pm)

 

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Subject: Lofting question from a newbie


arcady ( ) posted Sun, 05 February 2006 at 4:35 PM · edited Mon, 25 November 2024 at 7:09 PM

file_324085.jpg

Item 1 is the bottom of a shirt object. Item2 was made from copying the bottom of item 1 then pasting and dragging it down a little. Item 3 is the top of a lofted cylander. I had wanted to loft the bottom of item 3 to the top of item 2, but it kept giving me the following error: "Can't perform the action: select polylines dettached from any surface to use this tool" What is this exactly? I've tried running 'detact polygons', but that hasn't helped. The end product I desire is to fit item 3 onto item 1. The bottom of item 3 is a circle, and the bottom of item 1 is shaped to fit around the waist of a figure. I will be adding a few more lines in between these ends to get it to shape around the hips better, and to give me more polys along the 'dress', but my first task is to simply figure out the best way to attach whatever skirt I do design to the top piece, without altering the shape of the bottom of the shirt. Any advice?

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cckens ( ) posted Mon, 06 February 2006 at 11:29 AM

arcady What looks like may be happening is you have some kind of open polyline or maybe multiple split verticies. Tighten the circle #1 by welding vertices with a tolerance less than the distance between 2 of the vertices. This should close up any holes or multiple vertices. My usual tolerance it .1, but judging by the magnification of your mesh it might have to be less than that. Repeat with circle #2 and try to loft to 3. Hard to see if there are any open polys or stuff... Hope this helps Ken dork.gif


sailor_ed ( ) posted Mon, 06 February 2006 at 5:16 PM · edited Mon, 06 February 2006 at 5:20 PM

file_324086.jpg

Here is an illustration of how to create a surface connecting your two objects.
  1. Select the curve at the bottom of the upper object (1) and use Model>Extract Curve to make a new curve in the same position. I have moved it down so you can see what is going on but you can leave it where it is. (I have also added points to this curve to show that the number of points does not matter to the final surface)
  2. Do the same for the curve at the top of the bottom object (2)
  3. Join the curves with lines at (3) and (4). They should follow the curve of the joining surface you desire. It is easiest to do this in the 2d view so that the connecting lines are formed of vertecies that lie mostly in one plane. "Snap" the lines to a vertex in the curve by watching that the cursor changes when you are over a vertex.
  4. Select Construct>Gordon Surface
    5 Select curve (1) then (2) and hit enter
  5. Select line (3) then (4) and hit enter
  6. Your surface should be created. If you have left the curves where you extracted them you should be able to weld the whole business together rather easily.

This is how I would do it, not to say there aren't other (better) ways!

Message edited on: 02/06/2006 17:20


arcady ( ) posted Mon, 06 February 2006 at 10:26 PM

I believe Gordon Surface is a pro feature only. But for the advice thank you, and I will try to make use of what I am able to from both of the posts.

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sailor_ed ( ) posted Tue, 07 February 2006 at 10:32 AM

Sorry for that, I guess my advice then is to spring for the pro version.:-(


whkguamusa ( ) posted Tue, 07 February 2006 at 4:51 PM

You should be able to do this in the standard version with the loft command. Make sure your selection mode is in "Edge" mode (Third icon from the left in the selection tab). window select the top edge(s) of the skirt, then shift select the ring and the lower edge from the top object - then select the loft option - you should have your connecting surface. Good modeling practice would be to avoid lofting edges with mismatched numbers of points to keep the mesh clean and easy to edit and texture. wayne k guam usa


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