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is there any way to generate a cut throw an object (target) so that the whole projection of another object (template) fits ?

For example something like in the image: I have some 3d models (templates - animals or furniture for example) and I have some target object (a cube for example). So I want to use the whole projection of the object to cut a hole through the cube so that the template object can go from one side to the other.

enter image description here

Boolean modifier is the first thing that comes to my mind, but it only works with the intersection of the object, I would like to achieve something similar but with the projection.

Thanks!

Edit: I already tried knive project but for some reason when trying to use a complex mesh as the template object I have this error "No other selected objects have wire or boundary edges to use for projection"

enter image description here

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  • $\begingroup$ I'm not entirely sure what you are after, but wouldn't giving the projected mesh some depth (solidify modifier) solve that? $\endgroup$ Nov 6, 2023 at 18:56
  • $\begingroup$ To get this clear... you want to project the outline of an object when viewed from a particular angle onto another object, then use that outline to cut through it? $\endgroup$
    – Psyonic
    Nov 6, 2023 at 22:13
  • $\begingroup$ Exactly @Psyonic! $\endgroup$
    – Iván
    Nov 7, 2023 at 4:08

1 Answer 1

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Use Object Line Art from the Grease Pencil

This creates an outline of an object in the direction the camera is pointing.

Create a camera pointing in the direction you want:
enter image description here

Select the object you want the outline of and choose Add - Grease Pencil - Object Line Art
enter image description here

A new Line Art is created, add a shrinkwrap modifier to it and choose your target object - It helps to have everything lined up first enter image description here

Next apply the modifier stack and convert it to Polygon Curve enter image description here

Then convert that to mesh enter image description here

You will now have a new mesh object in the exact shape of the object outline. Sometimes it will need some cleanup as there might be overlapping edges. enter image description here

Then you can use it as your cutter object enter image description here

Hope this is what you were looking for... Happy Blending

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  • $\begingroup$ It worked! Cool. Now I need to script this, it is going to be... interesting. $\endgroup$
    – Iván
    Nov 8, 2023 at 10:53

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