Add value to edge on a mesh based on face.

I have a list of mesh faces, and each face has a list of edges. How can I add a true/false value to and edge based on the face that it sits on?

so that face if face 0 and 1 share edge A the list would look like

{0}(A,true)(B,false)(C,true)

{1}(A,false)(B,true)(C,false)

Edit:

Let me rephrase the question, attached is a screenshot of the goal.

I have a tree where each branch is a face and edge index's are values.
Each edge is in the list two times as it connects 2 faces.

For each instance of an edge index I want to set one to true and the other to false. So that each shared edge has an opposite boolean depending on the face its part of.

Attachments:

Screenshot 2016-06-26 08.38.20.png, 199 KB
Screenshot 2016-06-26 12.15.20.png, 55 KB

Replies to This Discussion

Permalink Reply by peter fotiadis on June 26, 2016 at 12:08am

Use related connectivity trees (edges to faces, faces to edges, faces to faces etc etc). Sandbox provides such kind of stuff (but there's issues for non manifold meshes - if there's such animals around) .

That said since a mesh consists from 3 types of objects (vertices, edges and faces) there's 9 possible connectivity possibilities.

BTW: for 2 given Lists of items a connectivity tree samples integers in branches where the primary dimension is the item's index in List A and the items are indices in List B.

Permalink Reply by Richard Schaffranek on June 26, 2016 at 3:09am

Hallo Tomasz

what is it you are trying to archiev? Could you specify a little bit further?

Permalink Reply by Tomasz Mlynarski on June 26, 2016 at 6:48am

I added a detail of the condition.

Given a single edge, a face should draw geometry that extends into adjacent face. That adjacent face should then draw geometry that recedes a little bit.

RSS