From: David Knezevic <dknezevic@se...>  20130805 13:06:17

On 08/05/2013 03:04 PM, Roy Stogner wrote: > > On Mon, 5 Aug 2013, David Knezevic wrote: > >> I sometimes have some tolerance issues, so that I have to find the >> "nearest point" in the (dim1)dimensional mesh. At present, I just find >> the "nearest node" on the (dim1)dimensional mesh (rather than the >> nearest interior point or whatever), and it works fine. >> >> I gather that this is because (at least in my case) the >> DirichletBoundary only evaluates the FunctionBase at the nodes on the >> boundary of the dimdimensional mesh. I'm wondering if this will be true >> in general, or if this is just due to the fact that I'm using nodal >> (i.e. LAGRANGE) basis functions in this case? > > On p==1 elements our projection is just nodal interpolation and the > evaluation will only use nodal data. Even p==2 Lagrange elements may > produce data requests from nonnodal quadrature points, though. Understood, thanks! 