Make tolerances in checkGeometry depending on ctype

Simon Praetoriusrequested to merge
simon.praetorius/dune-geometry:issue/check_geometry_tolerances into master

Summary

Replaces fixed tolerances 1.e-8 with ctype dependent tolerance

Details

Tests with geometries using float as ctype may fail to reach the desired fixed tolerance 1.e-8. This is corrected by using the tolerance=sqrt(numeric_limits<ctype>::epsilon()) value. This value gives approximately

  • tolerance<double> = 1.5e-8 and
  • tolerance<float> = 3.5e-4

and thus previous test runs with ctype=double should also pass the test with this change.

Edited by Simon Praetorius

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