1st SOFA NG version

[hugtalbot]

A list of components is being defined, see issue #226
The idea is to present shortly a first prototype of SOFA NG to involve more and more people in the cleaning, testing of SOFA.

This 1st SOFA NG version focuses on :

• very few classes (~20)
• simple implementation of the base classes

This would allow to have a first set of simple components allowing for:

• new users to understand SOFA easier
• advanced developers and companies using SOFA for its core features (scene graph, DAG, visitors etc.) but without interests for all other codes

Example of these 20 components: DefaultAnimationLoop, UniformMass, ConstantForceField, EulerExplicit, Cholesky (see #244 ), IdentityMapping, FixedConstraint (see #246 ), ValuesFromIndices, MeshObjLoader (and others), RequiredPlugin.

Any feedback is more than welcome : @ChristianDuriez @damienmarchal @StephaneCotin @JeremieA @matthieu-nesme

[matthieu-nesme]

I would add ImplicitEuler + CGSolver that are the initial reasons for being of SOFA.

Personally I would remove the assembled solver for the first sofa-ng. For me it should become an external plugin and this code should be removed from the main sofa (the same way Compliant does).

[hugtalbot]

CG is already in the list my bad, I forgot it sorry!

The description corresponds to a 1st level / layer of SOFA NG.
We intend to have (still in SOFA NG) a second layer of components. This second layer would focus on :

• state of the art algorithm (like EulerImplicit)
• advanced, efficient and validated algorithms (cf Project https://github.com/sofa-framework/sofa/projects/6)

I would rather see the EulerImplicit in this second level.
The first level would propose only one implementation per category (e.g. one integration scheme). @matthieu-nesme, you would then rather like to see one explicit and one implicit integration scheme, right?

[hugtalbot]

About assembled solvers, the idea is to keep at least one example of a direct solver (Cholesky or a better one). Wouldn't it suit you?

[damienmarchal]

We have started bit of cleaning on the "pre-selected" component: #258

[hugtalbot]

a scheme of the architecture should also be presented : structure, nomenclature etc.

[hugtalbot]

• A first proto should be delivered in July 17.
• Must list the BaseClass component : not implemented in NG1