How to move multiple not in plane vertices to a surface or an edge?

Question

I am using Blender since few time and I would need to ask you this: is there a way to move (grab) multiple vertices, that are not on the same plane, to a common face (edge)?

My problem is like to project, along a specified vector or direction, a set of vertices without copying them, but, before, moving them.

I have faced this problem when trying to fix some thin face or not planar face in my geometry: in these cases it would be great to create a "brand new" planar face, that lays on the correct plane, and then make all the bad face vertices move on it along a specific vector (to do that I usually create a custom reference system and use one of its axis).

Thank you, Federico

Answer 1

At first, we take a case, when you already have custom transform orientation.

So, I have this setup, with custom orientation:

1. Set 3D cursor on the plane, that is should be a zero-level for vertexes. Depends on left\right click select mode in your setup, you can press Left Mouse Button, or use a 3D cursor tool.

2. Set transform orientation to 3D-cursor (use . key):

3. When press S, Z, 0 to scale vertexes by 0 in z axis.

But wait, where is a simpler way

I don't use a transform orientation in this way.

1. At first, I rotate a view in a face direction using Shift+Num 7:

2. When in the snapping I select Snap to Faces, Project to self and Project individual elements:

3. When I press G, hold Ctrl and press Left mouse button without moving. As a result, selected vertexes has been projected on face. This method works with curved shapes in background also.