[FEM.Elastic] Start unification of tetra FF and division of tests

[alxbilger]

3 different components for linear elasticity on tetrahedra:

• FastTetrahedralCorotationalForceField
• TetrahedralCorotationalFEMForceField
• TetrahedronFEMForceField

The 3 components have similarities (even duplicated code), but don't share anything. It's time for refactoring!

My focus was the refactoring of the unit tests. Before the PR, a unique class tested the 3 components using a series of if. I refactored the 3 classes in order to reduce the specific processing in the unit test, i.e. reduce the number of if.

• The 3 classes now inherit from a common base class BaseLinearElasticityFEMForceField. I moved everything that was common (only regarding the unit test. More common code is remaining) in this class. It includes:
• A common Data for Young's modulus and Poisson's ratio. This way, they share type, the same default value, and the same description. Note that Young's modulus in FastTetrahedralCorotationalForceField and TetrahedralCorotationalFEMForceField was a scalar, and now it's a vector of scalars. This requires to add a common way to access the Young's modulus of the i-th element. This is also a breaking change.

This allows to define a typed unit test for all 3 classes. The particularities of the classes are defined in a derived class of the unit test. To me, a great advantage, is that we identify clearly that there are unit tests for the 3 components, because there a file for each class. It was not obvious before.

[ci-depends-on https://github.com/SofaDefrost/ModelOrderReduction/pull/133]

---

By submitting this pull request, I acknowledge that
I have read, understand, and agree SOFA Developer Certificate of Origin (DCO).

---

Reviewers will merge this pull-request only if

• it builds with SUCCESS for all platforms on the CI.
• it does not generate new warnings.
• it does not generate new unit test failures.
• it does not generate new scene test failures.
• it does not break API compatibility.
• it is more than 1 week old (or has fast-merge label).

[epernod]

ah... ok good.. it was in my todo list of next month :)

[sofabot]

[ci-depends-on] detected during build #2.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #3.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[alxbilger]

[ci-build][with-all-tests]

[sofabot]

[ci-depends-on] detected during build #4.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #5.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #6.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #7.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #8.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #9.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #10.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #11.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[sofabot]

[ci-depends-on] detected during build #12.

To unlock the merge button, you must

• Merge or close Remove redundant Data properties in HyperReducedTetrahedralCorotationalFEMForceField SofaDefrost/ModelOrderReduction#133
  For this build, ModelOrderReduction/ExternalProjectConfig.cmake.in will be edited by builders with
  GIT_REPOSITORY https://github.com/SofaDefrost/ModelOrderReduction
  GIT_TAG 4ef2eea7e5e89044990ffa1acd89c1512cd5bc27

[epernod]

[ci-build]

[sofabot]

[ci-depends-on] detected during build #13.

All dependencies are merged/closed and all ExternalProject pointers are up-to-date. Congrats! 👍