Why I cannot intersect faces?


#1

Why I cannot to intersect faces so I could to push pull the oval shape into the yellow “wall”? I tried to select the oval shape and then intersect with Model or with context. Then I want to select the yellow face which should be intersected, but it is not intersected still.

test.skp (60.6 KB)


#2

Both shapes need to be seperate groups or not grouped at all.
Alternatively you can try ‘Drape Tool’.


#3

The first comment by @filibis is where your problem lies. See simple screencast below where I explode the group to make all the geometry “equal” before isolating inner shape and pushing through.


#4

Related to this …
I am experiencing mystery problems when intersecting faces with model.

Consider a flat vertical plane being intersected with a house-wall in order to
"cut out" the windows and doors in order to skin-over the internal structure.

I always make sure that the plane is slightly “inside” the surface geometry
to ensure it is truly intersected. Coplanar geometry sometimes does and sometimes does not get intersected properly.

I observe the rectangle geometry being superimposed on the vertical plane, but when I go to “cut out” the opening faces, some of them are not separated from the rest of the whole plane. There are apparent leaks or non-coplanarities.

Sometimes I will try to bisect/triangulate the leaky openings, deleting those faces which are separated and that process can generate quite a convoluted and non-intuitive mess.
Sometimes I just draw another rectangle over the intersection-generated rectangle.
Sometimes that solves the problem for that particular opening, other times it does not.
I have resorted to just creating yet another new plane on the face or the intersected plane, manually re-drawing the openings inferenced to the intersected openings and abandoning the intersected plane/geometry.

Anyone run into this ? And have a workaround?
There is probably some addin to enforce coplanarity of selected geometry…
This has to be a bug.


#5

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