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spital mesh
show user profile  aca88
don't know if it is a stupid question but is there a chance i can convert a spiral shape into a surface ?

tha spiral shape is a Nurbspointcurve(if it is helpfull);

read 565 times
11/29/2011 3:08:59 PM (last edit: 11/29/2011 3:08:59 PM)
show user profile  aca88
found something.
read 546 times
11/29/2011 6:29:03 PM (last edit: 11/29/2011 6:29:03 PM)
show user profile  mrgrotey
If you could tell us what you found someone else with the same problem will get help by searching

read 539 times
11/29/2011 7:00:17 PM (last edit: 11/29/2011 7:00:17 PM)
show user profile  aca88
didnt find anything in the web really. i just do it indirectly:
i have my spiral, i put an extrude modifier on it. adjust the amount such that it is covering my spiral voids. and then i use a script that is producing contour lines on my extruded spiral. so i get my spiral shape again but this time it is not a continous line but contour lines. then i crossect , put surface modifier etc..

read 526 times
11/29/2011 8:58:27 PM (last edit: 11/29/2011 9:00:07 PM)
show user profile  Garp
Just an idea (if it's what you're after):
convert your curve to editable spline, select it at the spline sub-object level, shift-drag it up, then cross-section and surface mods.
If it's making at least one turn you can use vertex snap whent cloning it.

read 520 times
11/29/2011 9:04:18 PM (last edit: 11/29/2011 9:05:27 PM)
show user profile  aca88
@garp well yes it is doing the job but this technique stands for the "extrude" modifier in my technique.
i still dont get a closed surface from the spiral shape (which is what im after).

either ways i need to contour it.
read 513 times
11/29/2011 9:48:02 PM (last edit: 11/29/2011 9:48:02 PM)
show user profile  Garp
Can you post something? I'm having trouble picturing it.

read 505 times
11/29/2011 10:04:33 PM (last edit: 11/29/2011 10:04:33 PM)
show user profile  aca88

not quite polished but at least is one surface. would like to know though if someone has a better idea of having a smoother surface. (like a cylinder)

read 494 times
11/29/2011 11:12:22 PM (last edit: 11/29/2011 11:12:22 PM)
show user profile  Garp
To make it simple, you can build one portion with a Helix. Then clone/attach/weld.

Unable to display content. Adobe Flash is required.

The problem with the Helix primitive is that it has 40 vertices per turns (which gives a wonky 39 segments shape) and there is no control over it. If you need a specific number of segments per turn, you can make your own helix out of a box.
Set its height to that of the helix, its width and length to the helix's radius times square root of 2 (enter ctrl-n in the spinner field to launch the calculator) and its height segments to the number of sides you want on the result. Then extract an edge loop as a shape.
Here is an example for a helix with a height of 20, a radius of 30 and 24 segments.

Unable to display content. Adobe Flash is required.

read 475 times
11/30/2011 9:44:57 AM (last edit: 11/30/2011 9:52:00 AM)
show user profile  aca88
that is very interesting.. thank you. especially the second video.

the problem with what i want to do is that i do not have a linear helix. but a non linear differential van der pol phase diagramm (like a distorted helix) and it is not that easy to clone and snap it.

other than that the videos are very helpful.
read 453 times
11/30/2011 7:35:08 PM (last edit: 11/30/2011 7:35:08 PM)
show user profile  Garp
>a non linear differential van der pol phase diagramm
I take it it wasn't for a screw thread then.

*googles the stuff to see what the heck it's about*

read 450 times
11/30/2011 7:57:49 PM (last edit: 11/30/2011 7:57:49 PM)
show user profile  aca88
no ;P
read 444 times
11/30/2011 11:19:49 PM (last edit: 11/30/2011 11:19:49 PM)
show user profile  dragopede
Brilliant solution, Garp. Videos are especially appreciated.
read 439 times
12/1/2011 9:54:42 AM (last edit: 12/1/2011 9:54:42 AM)
show user profile  Garp
aca88, if you could clarify a little, there might be a very simple scripted solution.
Splines are easy to build with maxscript.

read 433 times
12/1/2011 10:20:27 AM (last edit: 12/1/2011 10:20:27 AM)
show user profile  ccampbell
Not sure if this is what you are after. you can use any type of helix you or spline shape you like.

- Convert to editable spline
- Add normalize spline modifier and set to low tolerance to hold shape and increase the knot count.
- Add edit spline modifier to check that you have enough points
- When you are ready collaps stack and use the "enable in viewport" sides, thickness as well as
steps in the interpolation rollout and uncheck optimize and adaptive.
- When you are comfortable with your spline right click and convert to NURBS
hope it helps!

$Entrepreneur = if((Designer + Engineer)*Programmer){Problem Solver};

read 418 times
12/1/2011 6:28:19 PM (last edit: 12/1/2011 6:28:19 PM)
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