Incompatible Changes

• Require C++17. by @drwells in #224
• Rename MeterBase to just Meter. by @drwells in #207
• Use fewer cells in VolumeMeter. by @drwells in #221

New Features

• Add architecture overview by @drwells in #208
• IIM Intersection code by @ryanleaf1000 in #199

Improvements

• Always disable optimizations for Triangle. by @drwells in #210
• Permit boundary forces to depend on the deformation gradient. by @drwells in #212
• Add support for timers in non-SAMRAI code. by @drwells in #216
• Fix a performance bug in PointValues. by @drwells in #217
• Add a timer barrier before compressing vectors. by @drwells in #220

New Contributors

• @ryanleaf1000 made their first contribution in #199

Full Changelog: v2.0.0...v3.1.0

Incompatible Changes

• Set up strains also with positions and velocities. by @drwells in #198
• Make compute_mean_value() const. by @drwells in #189
• Convert BasePatchHierarchy to PatchHierarchy. by @drwells in #193

New Features

• VolumeMeter by @drwells in #200
• Start drafting PatchIntersectionMap. by @drwells in #184

Improvements

• Separate some more definitions and declarations. by @drwells in #183
• Add a bunch more timers to IFEDMethod. by @drwells in #186
• CI: add scripts to automatically check indentation. by @drwells in #188
• Move most of SurfaceMeter into a new base class. by @drwells in #196
• OverlapTriangulation: redo the way we handle subcell data. by @drwells in #201
• Box predicate by @drwells in #202

Full Changelog: v1.0.0...v2.1.0

Version 1.0.0 of fiddle, a library for doing fluid-structure interaction with IBAMR and deal.II.