Fusion 360: Equivalent of OpenSCAD 'Hull' function

[Alex Gibson]

Hi all,

 

I’m using fusion 360 to re-create some models I made in OpenSCAD, to make them more ‘organic’and te enable editing in traditional CAD.

 

However I’ve found no immediate replacement for the tool I currently use to create more organic shapes – hull() {…}   – this is like you have an infinitely stretchy bag around all the objects it includes

 

Here’s an example

 

$fn=100;

hull()

                {

                sphere(20);

                translate([30,0,0])

                                cube([20,5,30],center=true);

                translate([-10,5,0])

                                cylinder(40,5,5,center=true);

                }

 

 

(which gives…)

}

 

Does anyone know where this function is within Fusion please?

 

I know there are other ways in Fusion to create shapes – but I need to make an exactly equivalent shape to fit with an OpenSCAD hull.

Cheers

 

Alex

[Jeremy Poulter]

Can you not use a combination of both? IE create the thing that uses hull in OpenSCAD and then import into fusion 360?

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[daprigoo]

Ian converted minkowskis and hull constructs into rounded polygons in his OpenSCAD, see this thread;

http://forum.openscad.org/Script-to-replicate-hull-and-minkoswki-for-CSG-export-import-into-FreeCAD-td16537i20.html

David

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[Alex Gibson]

Thanks, checking it out!

[Alex Gibson]

Ah – been around this loop previously. 

 

What I really need is a 3D version of nophead’s rounded_polygon script.  More like ‘rounded_polyhedron’…

 

This worked fine for Ian because he was dealing with 2D laser/CNC cut parts.

 

Will ask Nophead very nicely…

[Arthur]

Let me know if you figure this out Alex, I want to make a model of a boat hull from the designs. Which are crosssections on 3 axis, some like what you have in openSCAD looks like it would work well.

Maybe that is why it is called hull?

[Tony Short]

In 360 you would use the Loft function to achieve this. Pierre successfully modelled a surf board in Fusion using the same method, and 3 axis cross sections.

https://www.youtube.com/watch?v=fXQ28AVaMh0

T

[daprigoo]

If you want to design a boat hull specifically, then perhaps the open
source Free!ship package might be useful;

https://sourceforge.net/projects/freeship/
http://www.hapby.v-nam.net/FREEship/FREEship-Tutorial1.html

David

[Alex Gibson]

Hi Arthur

Oddly not - to achieve a 3D model from 2d plans you can do the reverse of the 'projection' function - import the elevations as DXF, use the extrude  function to give them correct depth, and use the 'intersection' function to make a 3D model where they all coincide.  The trick is getting a common centre point for all.  

Happy to help

Cheers

Alex 

Tapped on my mobile phone.

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[Ryan .]

Loft is what you want. It isn't the same as hull, but that's how you do it.

R

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[Simon Green]

On Wednesday, 16 November 2016 23:55:38 UTC, Arthur wrote:

Let me know if you figure this out Alex, I want to make a model of a boat hull from the designs. Which are crosssections on 3 axis, some like what you have in openSCAD looks like it would work well.

Maybe that is why it is called hull?

FWIW, I did this in F360 to produce an STL for milling. I created several curves and then did a surface sweep to create the external surface.