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Update 2 I achieved the needed model by using the Knife Projection tool. Thanks to all the suggestions.

I am trying to create an object using Splines and would like to sort of "Attach" other splines and do some boolean operations on them before extruding.

As an example in the picture below there are multiple spline shapes,a ractangular one, a set of circles, and another rectangle.

I am trying to attach (using the word attach here referring to a similar concept in 3ds MAX) all of them together and then subtract the inner circles and the rectangle.

Spline shapes

I can not find a way to do that, can someone point me in the right direction please.

Update 1 I followed the idea of going with the Join as suggested by the answer and somehow that does not work as desired. Let me explain. Here is a simple image that I am trying to create.

Blue Print

Created the desired number of individual spline polygons and placed them like so: Layout

And after the Join:

After Join

Notice the extrusions/extra faces below the tall rectangles? Any idea how I can make it not take the lower part of the door way?

Thanks & Regards.

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  • $\begingroup$ could you please show a picture of what you want to do? $\endgroup$
    – moonboots
    Aug 31, 2019 at 7:50

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The right term in Blender is Join. Select all your curves, then Object/Join.

In the Curve panel, make sure your curve is set to "2D", so the inner shapes can be subtracted from the outer shape.

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  • $\begingroup$ Maybe I am missing something here. Added more info on using Join in the question, please take a look. $\endgroup$
    – Codehelp
    Aug 31, 2019 at 15:37
  • $\begingroup$ As far as I know, Blender can't do that. With a 3d mesh, you could use a Difference Boolean modifier to hollow the tall rectangles, but that won't work with 2d curves. Maybe you could use a proper vector editor (like Inkscape) to produce a shape looking like your second picture, export it as a svg file, then import it into Blender (it will be imported as a curve/spline). $\endgroup$
    – thibsert
    Aug 31, 2019 at 21:07
  • $\begingroup$ ... or, depending of what you're trying to achieve : you can convert picture #4 into a Mesh (Object/Convert To/Mesh from curve), then delete the unwanted faces. $\endgroup$
    – thibsert
    Aug 31, 2019 at 21:11

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