[Dune] Barycentric coordinates of a point w.r.t. an entity

[Dedner, Andreas]

If you simply want Barycentric coordinates that is quite simple:
If x is a global coordinate then
z=geometry.local(x) ;
l[0]=1-z[0]-...-z[d-1];
l[i+1]=z[i];  (0<=i<d)
gives you Barycentric coordinates.
Andreas


Andreas Buhr <andreas at andreasbuhr.de> wrote:
On 04/12/2013 04:46 PM, Sacconi, Andrea wrote:
> If you are given a point and an entity, is there a direct method in DUNE
> to get the barycentric coordinates of that point with respect to the
> vertices of the entity?

Hi Andrea,

I think a p1basis is equivalent to barycentric coordinates.
Can you create a p1 basis and call evaluateFunction?

Best,
Andreas


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