CGAL users discussion list

["Fernando Cacciola" <>]

Hello Pablo,

> Hi, every one, I'm trying to use CGAL to simplify a mesh which is already
> simple, but has some unnecessary edges. The mesh is a model created by 3d
> MAX of a building. The walls hav sometimes many triangles in it which adds
> many unnecessary edges... My goal is to remove this triangles.. a simple
> test is to check if adjacent triangle has very near normals, but I dont want
> to do this by my self, im trying to use cgal to do something like this. I
> have taken all triangles from the model and I've added it to a Polyhedron
> just like in the examples provided in the official website (Polyhedron P;
> P.make_triangle( P1, P2, P3) .... for each triangle)...
>
> The result is that no edges were removed... so I don't know what do i need
> to do.. My polycies are :
> SMS::Edge_length_cost   and SMS::Midpoint_placement using the ratio stop
> criteria... Shouldn't the walls composed by many triangles be simplified?

What's the stop condition?

What happens if you use the LindstromTurk policies?
(which btw are much more likely to give you the expected results)


HTH

Fernando Cacciola
GeometryFactory