Merge pull request #51 from Ferrite-FEM/do/flux-vis

* add gradient field interpolation for scalar and vector valued problems
* add test battery for gradient field interpolation of scalar problems
* update Makie deps to fix some bugs regarding visualization
* refactor internal incompressible elasticity example for more flexibility in the solution construction
* fix color range update

Co-authored-by: Maximilian Köhler
Co-authored-by: Dennis Ogiermann

CHANGELOG.md

@@ -0,0 +1,26 @@
+# FerriteViz.jl changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+
+## [Unreleased]
+### Added
+ - Docs and helper for gradient field visualization based on interpolation [#51][github-51].
+   Currently only useful in 2D, because we have no clip plane feature to introspect the interior
+   of 3D problems.
+ - Manufactured heat problem to test correctness of gradient field computation and as a
+   helper to generate scalar-valued solutions with different ansatz [#51][github-51].
+
+### Modified
+ - Incompressible elasticity solver now takes the Ansatz functions and the actual material
+   parameters instead of the poisson number the Ansatz functions [#51][github-51].
+
+### Fixed
+ - An unknown bug has been fixed, which computes the colorbar `(min,max)` wrong. Now the `max` is
+   set to be `1.01` of `min` guaranteeing that the value is larger than `min` if close to zero [#51][github-51].
+ - Update Makie dependencies to fix some visualization bugs [#51][github-51].
+
+[github-51](https://github.com/Ferrite-FEM/Ferrite.jl/pull/51)

Project.toml

@@ -16,7 +16,8 @@ Tensors = "1"
 julia = "1"
 
 [extras]
+SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Test"]
+test = ["SparseArrays", "Test"]