How to use a shape to make an edge on another?

Support Modeling
1

Hi again. This time hopefully I’ll explain this well enough.

Shape
Shape1111×1111 109 KB

Shape A is the reference shape that I want the edge to be. Shape B is the shape I want to create it on.

2

Yes, I know about the Boolean Modifier, but for my purposes I don’t think it’ll work.

3

Knife project?

4

Is B flat or sloped?
Why do you think Boolean is not good enough? The resulting messy topology?

Apart from boolean, live boolean (my phrase, meaning Ctrl-F > Intersect (boolean)) or knife project - you really only have delete the 4 relevant B faces and fill out from the A object.

5

I mean, Doesn’t really matter, just need to create an edge where the cylinder is. I don’t wanna use boolean because I need to be able to take it out of blender, and I’m not sure how to create geometry after using boolean.

6

I tried but I don’t think I know how to use it properly. How do I do it?

7

…

Apply Modifier

Apply before exporting to make it real. A lot of the time booleans should just be applied anyhow.

1 Like
8

Edit Mode. Mesh Menu > knife project > right click on 'Knife Project" > Online Manual. It takes you straight to the correct Manual page…
https://docs.blender.org/manual/en/3.4/modeling/meshes/editing/mesh/knife_project.html?highlight=knife%20project

To use Knife Project, first in Object Mode select the objects to be cut, then switch to Edit Mode and select the cutting objects in the Outliner (Ctrl-LMB), and finally choose Mesh ‣ Knife Project.

I do not want to seem rude, but, my friend, you really need to upgrade your research skills. Yes there is a huge amount to learn. That is why using the manual is so important.

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