On 10/16/22 19:21, 'yy.wayne' via deal.II User Group wrote:

But I don't find a iterator for edge in CellAccessor. There are cell, face, and vertex iterators, but lArclengthProjectionLineManifold requires a 1d topology. Which part of  mesh should I set manifold?

cell->line(l) or cell->face(f)->line(l) gives you what you want.

Best
 W.

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Wolfgang Bangerth          email:                 [email protected]
                           www: http://www.math.colostate.edu/~bangerth/

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