Hi, 2017-12-19 15:59 GMT-05:00 RAJAT ARORA <[email protected]>:
> > So, going by what you described, if x2 is unknown, how can the mapping > class calculate the information? > > Is it because it uses the manifold information (which is a straight > boundary by default) attached to it to get the nodal coordinates of the > middle node and then calculate the Jacobian and other information? > Mapping knows the cell in the real space because of this function <http://dealii.org/developer/doxygen/deal.II/classMappingQGeneric.html#a0b69cbf5b8aec499cea0f6cdafd9cd7c>. Depending on the mapping you are using, it can use the information from the manifold (that's what happens when you use MappingManifold) or just an approximation of the manifold (that's what happens with MappingQGeneric). This function <http://dealii.org/developer/doxygen/deal.II/classMappingQGeneric.html#ac105bb3b1bc6263bdaec2a8d783cf3ff> maps a point in the reference space to a point in the real space. So you know where x2 is in the real space, since you know it's position in the reference space. Best, Bruno -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
