Arch WB Wall and splines

[drmacro]

From a bricklayers point of view, hell no!

True, for building walls.

It was, more or less, a joke, but i would still refuse to build a wall like that, if this have not a technical reason, like a concrete spiral for a turbine.


Greetings
user1234

It's ok 3d printers will be doing it for you.

[user1234]

In the present and in the near future in particular, we can use robots to construct curvy or patterned walls (especially with Pre-fab).

It's ok 3d printers will be doing it for you.

I know, but ordering objects (area efficiency) and maintain them (like simple thing like cleaning)? Rectangular ftw! Anyway, i am not in arch.


Greetings
user1234

[paullee]

It seems to be broken here. Basically just ignores the spline in a sketch.

Do you mind creating an issue on github to prevent this discussion and suggested solution above be forgotten please ?

[drmacro]

It seems to be broken here. Basically just ignores the spline in a sketch.

Do you mind creating an issue on github to prevent this discussion and suggested solution above be forgotten please ?

issue #8370

[yorik]

I don0t know the mathematics but you could use:

Code: Select all

spline2 = Part.OffsetCurve(bs0, 10, V3d(0,0,1))

Part.show(spline2.toShape(), "offset_spline")

I can´t produce a correctly offsetted bspline (i mean usable for walls) with this method it seems... Does it work for you if you offset for ex. along (0,1,0)?

[onekk]

...
I can´t produce a correctly offsetted bspline (i mean usable for walls) with this method it seems... Does it work for you if you offset for ex. along (0,1,0)?

For some "directions" it produces weird results, when experimenting I have found that as example if you draw the BSpline in the XY plane, you could extrude it but modify the code

Code: Select all

Part.show(spline2.toShape(), "offset_splineV001")

spline3 = Part.OffsetCurve(bs0, 10, V3d(0, 1, 0))

Part.show(spline3.toShape(), "offset_splineV010")

spline4 = Part.OffsetCurve(bs0, 10, V3d(1, 0, 0))

Part.show(spline4.toShape(), "offset_splineV100")

offset_splineV100 is weird as it made a jump (why?) other seems more reasonable in aspect.

For which I was speaking about of mathematics behind Offset the Vector is not clear.

but as example if you use some not "relative axis data" I could not a reasonable term to define them:

Code: Select all

spline5 = Part.OffsetCurve(bs0, 10, V3d(0.5, 0.5, 0.5))

Part.show(spline5.toShape(), "offset_splineVhhh")

It seems again a reasonable result, (It has to see if it has some "sense")

I don't know with other data, but test code is general enough to modify data and experimenting, and maybe ask @wmayer what he thinks of weird results, maybe they have sense, but I can't see a reason for the "jump".

Sorry but I' model with scripting and usually find a way to make the job other times, I try to search workarounds, as I'm wiritng almot everyday code for FreeCAD to produce solids. If some of my experiments, could help to make FreeCAD better, I'm very pleased to contribute.

Regards

Carlo D.

[Roy_043]

The vector in this case is a normal I think. Leaving it at (0,0,1) should be OK for walls. In the example 10 is the offset distance.