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 (dim-1)-dimensional mesh. At present, I just find
>> the "nearest node" on the (dim-1)-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 dim-dimensional 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 non-nodal quadrature points, though.