Answers for "Lighting up all triangles between two points in a mesh?"
http://answers.unity.com/questions/854921/lighting-up-all-triangles-between-two-points-in-a.html
The latest answers for the question "Lighting up all triangles between two points in a mesh?"Answer by richyrich
http://answers.unity.com/answers/856937/view.html
Here's a hack for you until you find something better :)
Let's assume all the triangles like to place tennis, so between all the points on the triangles, place a plane pointing upwards. Now RaycastAll from the current position across all the tennis nets (planes). For all the hits, record the triangle that it is connected to. Now just go through your triangles and light them up.
I say its a hack - a better answer is probably to go find yourself code that works out line segment to line segment intersection, then use the triangle vertices as the points for each line segment (like the nets). Of course, most examples online will likely be right hand coordinate while Unity is left hand so you'd need to replace y changes with z for 3D verts. Enjoy :DWed, 17 Dec 2014 18:53:54 GMTrichyrich