How must be exactly the curves for the function Boolean "merge"
the line "working" is cross over

Hi Pilou, the line that doesn't work is going from the lower bottom corner to an upper corner, so it is diagonally slanted in 3D, it isn't aligned with the construction plane.

In Booleans when curves interact with solids, the curves must have a well defined projection direction perpendicular to the curve, so the curves must be planar like a circle, or if they are a line they must be parallel to one of the world xy/yz/xz planes.

If you draw your line along the bottom corners of the box so that it lined up on the xy plane, then you can do the merge as you want.

- Michael

the power of the function is that you can draw also directly on the volume!

Is this function (drawing on a volume) will be also implemented for a spherical volume?
Now we have yet the "project" or "intersect" but "draw"?

Hi Pilou, I definitely want to experiment with drawing on objects at some point in the future. It will be quite a lot of work so it will take a while for that to happen.

For a cube, it is not really recognizing the volume itself right now, it is just there are many key points on a cube that you can snap on to.

- Michael

Thx for precision :)

So a funny thing is for the "merge" function
Just move objects on any curves // (x y z) :)
Like a woodsman moves the piece to the blade of the lathe :)

Not a function "explode" for a merged object? :)
(for have a fragmented presentation of the result)
Moving result's pieces by hand is some hard when some fragments exist :)

Is that normal?
A plane + a circle (on the plane) give with boolean "merge" a minimum height to the circle?
( here I have erased the "center disc" result on the "front piece")
Ps Same result when the circle is over the plane

Hi Pilou, this one is definitely a bug, thanks for reporting it!

The bug is in how non-volumetric surfaces are handled in combination with auto-extruded curves. I've fixed this for the next beta so it will work in the expected way.

- Michael

hello all :)

thank you Pilou :) for the merge functions info.


ciao
torolf

Cool research !
yes crazzy forms can be made with a minimum effort with the "merge" function :)

Is that normal? (it's a same curve // but more long for the second)
I suppose yes but...

Hi Pilou, it is normal for this type of situation to fail.

It would be nice if it could work, but handling self-intersecting objects becomes much more difficult. Generally if a curve or surface folds and intersects itself it will not work properly for operations that involve calculating the intersections between objects.

- Michael

Thx : It that I had supposed but want to be sure :)