Hi all,
I'm looking for a solution to make a bottle with triangular facets...
What do you recommend?
thanks

ps: in attachment what I wish

It looks like a hexagonal prism with cut facets.

Maybe the antiprism script would help?

Or set up an a plane to cut facets? And rotate and cut more facets.

There is a gem cutting paper with code.

-Brian

Two antiprisms would do the center section??? Or not?
Then extend the triangle planes.

with triangles joined ... ok it's a solid but problem to filet ( pict 1 )

with 4 triangles fileted and a boolean union ... ok ( pict 2 )

draw the missing triangles and join a network according with the size of the filet ( yellow pieces ) ( pict 3 )

sorry bad english

Thanks
but i don't know what is antiprism script ?

http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=7583.1

here you go

download

antisprism 2 files in MoI command folder

_AntiPrism.htm
_AntiPrism.js

thanks corchet
but i want to draw lozenge on a form of bottle

Place the image into MoI, and measure dimensions. Ratios would help.

Draw a hexagon to center size, and extrude to bottle height.

Cut facets with trim or boolean, with 5 rotations.
Repeat near the top.

Hi Finema. You can draw in the front view the first losange. Then repeat it in top view as an hexagon. Then draw another losange in the gap of your array. Etc... The problem here is i cannot make it a solid May be a lack of precision?

ok losange

you spoke about triangles in your request ;)

moujiik

nice ;)

Ok, got it

I test a method :
hexagon
extrude (red part)
hexagon
extrude tapered and rotate 30° (orange and green part) moved up for Orange and mirrored for green part
another hexagon extruded tapered and rotated and moved more for cyan and blue part (with mirrored cyan).

With all of this you can do some boolean/merge and delete (or hide) all part we don't want.

And you have something near of what you want...

You have to do a crop with booeal operation to break points top and bottom



With more time you have exact copy of what you want.

Boolean/union and go...



Source here with hidden parts (you can unhide to see original solids).

Hi Finema, so the basic process for making a faceted structure is to use Draw curve > Polygon to draw some polygon sections in the Top view, and then move them to different z levels, then use Edit > Separate to break the polygons into individual lines, then draw lines between the polygon ends, then select the outline for a facet and use Construct > Planar to build a planar surface for that facet. Once all facets have been constructed you use Edit > Join to glue them together into a solid.

Different arrangements of the polygons like different rotations will make different variations in structure.

For your case here I'd do this process:

I'd start with Draw curve > Polygon and draw a hexagon like this:



Now for the next polygon - taking a look at your particular structure I note that most of the facets are actually 4 sided diamond parallelograms, not just triangles. So I focused on these ones in the middle:



So to make vertical parallelograms like that means the next section is going to need to be like this, with vertices on the midpoint of the start section, and then moved upwards in z:


Now like I mentioned above the main strategy for facets is to draw in lines between the polygon vertices, so draw in 2 lines like this using the 3D view:


Then to form the diamond, select those 2 lines and use Transform > Mirror in a side view to produce the bottom parts:


Select those 4 lines and use Construct > Planar to build a planar surface there:


Because the shape has rotational symmetry, you can quickly produce the other vertical pieces by selecting this one piece and use Transform > Array > Circular with an item count of 6 to generate the other ones:


Now to produce the next set of diamonds, select these 2 lines and use Transform > Rotate > Rotate axis, with the rotation axis at these 2 points:


Type in 180 as the rotation amount and that will swing those 2 lines around that axis to produce the upper pieces of the diamond:


Select these 4 lines and use Construct > Planar to make a planar surface there:


Select it and again use Transform > Array > Circular. Now draw a line across these top 2 points and use Construct > Planar again to make a triangle surface:


Select the triangle and use Transform > Array > Circular again. Then select all these pieces:


And use Transform > Mirror to populate the bottom pieces:


Use Edit > Join to glue all the pieces together, select the object and use Construct > Planar to cap off the top and bottom:


Hope that helps!

- Michael

Thanks a lot !!!
it's perfect !