Triangular Face element

[mvanzulli]

Addressing #77

In this PR a new AbstractFace abstract type is introduced, this abstract types is useful for processing boundary conditions. In particular, this new leaf is implemented:

"""
A `TriangularFace` represents an element composed by three `Node`s.
### Fields:
- `n₁`             -- stores first triangle node.
- `n₂`             -- stores second triangle node.
- `n₂`             -- stores third triangle node.
- `label`          -- stores the triangle label.
"""
struct TriangularFace{dim,N<:AbstractNode{dim},T<:Real} <: AbstractFace{dim,T}
    n₁::N
    n₂::N
    n₃::N
    label::Symbol
    function TriangularFace(n₁::N, n₂::N, n₃::N, label=:no_labelled_face) where
    {dim,T<:Real,N<:AbstractNode{dim,T}}
        new{dim,N,T}(n₁, n₂, n₃, Symbol(label))
    end
end

"Returns the nodes for the `TriangularFace` `tf`."
nodes(tf::TriangularFace) = [tf.n₁, tf.n₂, tf.n₃]

Also StructuralBoundaryConditions struct can now include faces boundary conditions.

[codecov-commenter]

Codecov Report

Merging #78 (8a383d4) into main (e0807e5) will increase coverage by 0.05%.
The diff coverage is 97.14%.

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@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
+ Coverage   87.16%   87.21%   +0.05%     
==========================================
  Files          25       26       +1     
  Lines         553      563      +10     
==========================================
+ Hits          482      491       +9     
- Misses         71       72       +1     

Impacted Files	Coverage Δ
src/Meshes/Meshes.jl	92.15% <ø> (ø)
src/StructuralModel/StructuralMaterials.jl	100.00% <ø> (ø)
src/StructuralModel/StructuralModel.jl	87.50% <ø> (ø)
src/Elements/Elements.jl	79.24% <91.66%> (+3.63%)	⬆️
src/Elements/Node.jl	66.66% <100.00%> (ø)
src/Elements/TriangularFace.jl	100.00% <100.00%> (ø)
src/Elements/Truss.jl	86.04% <100.00%> (ø)
...rc/StructuralModel/StructuralBoundaryConditions.jl	100.00% <100.00%> (ø)
src/StructuralModel/Structure.jl	100.00% <100.00%> (ø)

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[jorgepz]

vamo arrucaaaaa

[mforets]

this allocates; you may want to revisit later, storing an SVector directly.

[mvanzulli]

Okay, I also considered to store the nodes of the elements into a Vector instead of separated files:

struct TriangularFace{dim,N<:AbstractNode{dim},T<:Real} <: AbstractFace{dim,T}
    nodes::SVector{N}
    label::Symbol
    function TriangularFace(n₁::N, n₂::N, n₃::N, label=:no_labelled_face) where
    {dim,T<:Real,N<:AbstractNode{dim,T}}
        new{dim,N,T}(SVector(n₁, n₂, n₃), Symbol(label))
    end
end

"Returns the nodes for the `TriangularFace` `tf`."
nodes(tf::TriangularFace) = [tf.n₁, tf.n₂, tf.n₃]

[mvanzulli]

Open this in this issue #80