Add types MVec3, PosVector, VelVector

Project.toml

@@ -12,5 +12,6 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 Measures = "442fdcdd-2543-5da2-b0f3-8c86c306513e"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
+StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

src/VortexStepMethod.jl

@@ -1,6 +1,7 @@
 module VortexStepMethod
 
 using LinearAlgebra
+using StaticArrays
 using Logging
 using Statistics
 using Colors
@@ -18,6 +19,21 @@ export add_section!, set_va!
 export calculate_span, calculate_projected_area
 export plot_wing, plot_circulation_distribution, plot_geometry, plot_distribution, plot_polars
 
+"""
+   const MVec3    = MVector{3, Float64}
+
+Basic 3-dimensional vector, stack allocated, mutable.
+"""
+const MVec3    = MVector{3, Float64}
+
+"""
+   const PosVector=Union{MVec3, Vector}
+
+Position vector, either a `MVec3` or a `Vector` for use in function signatures.
+"""
+const PosVector=Union{MVec3, Vector}
+const VelVector=Union{MVec3, Vector}
+
 # Include core functionality
 include("wing_geometry.jl")
 include("filament.jl")

src/filament.jl

@@ -19,7 +19,7 @@ struct BoundFilament <: Filament
     length::Float64        # Filament length
     r0::Vector{Float64}    # Vector from x1 to x2
 
-    function BoundFilament(x1::Vector{Float64}, x2::Vector{Float64})
+    function BoundFilament(x1::PosVector, x2::PosVector)
         new(x1, x2, norm(x2 - x1), x2 - x1)
     end
 end
@@ -31,9 +31,9 @@ end
 Calculate induced velocity by a bound vortex filament at a point in space.
 """
 function velocity_3D_bound_vortex!(
-    vel::Vector{Float64},
+    vel::VelVector,
     filament::BoundFilament,
-    XVP::Vector{Float64},
+    XVP::PosVector,
     gamma::Float64,
     core_radius_fraction::Float64,
     work_vectors::NTuple{10, Vector{Float64}}
@@ -95,9 +95,9 @@ Reference: Rick Damiani et al. "A vortex step method for nonlinear airfoil polar
 as implemented in KiteAeroDyn".
 """
 function velocity_3D_trailing_vortex!(
-    vel::Vector{Float64},
+    vel::VelVector,
     filament::BoundFilament,
-    XVP::Vector{Float64},
+    XVP::PosVector,
     gamma::Float64,
     Uinf::Float64,
     work_vectors::NTuple{10,Vector{Float64}}
@@ -162,10 +162,10 @@ end
 Calculate induced velocity by a semi-infinite trailing vortex filament.
 """
 function velocity_3D_trailing_vortex_semiinfinite!(
-    vel::Vector{Float64},
+    vel::VelVector,
     filament::SemiInfiniteFilament,
-    Vf::Vector{Float64},
-    XVP::Vector{Float64},
+    Vf::VelVector,
+    XVP::PosVector,
     GAMMA::Float64,
     Uinf::Float64,
     work_vectors::NTuple{10,Vector{Float64}}

src/panel.jl

@@ -50,10 +50,10 @@ mutable struct Panel
     function Panel(
         section_1::Section,
         section_2::Section,
-        aerodynamic_center::Vector{Float64},
-        control_point::Vector{Float64},
-        bound_point_1::Vector{Float64},
-        bound_point_2::Vector{Float64},
+        aerodynamic_center::PosVector,
+        control_point::PosVector,
+        bound_point_1::PosVector,
+        bound_point_2::PosVector,
         x_airf::Vector{Float64},
         y_airf::Vector{Float64},
         z_airf::Vector{Float64}
@@ -352,10 +352,10 @@ Calculate the velocity induced by a vortex ring at a control point.
 """
 function calculate_velocity_induced_single_ring_semiinfinite(
     panel::Panel,
-    evaluation_point::Vector{Float64},
+    evaluation_point::PosVector,
     evaluation_point_on_bound::Bool,
     va_norm::Float64,
-    va_unit::Vector{Float64},
+    va_unit::VelVector,
     gamma::Float64,
     core_radius_fraction::Float64,
     work_vectors::NTuple{10,Vector{Float64}}
@@ -421,7 +421,7 @@ Only needed for VSM, as LLT bound and filament align, thus no induced velocity.
 """
 function calculate_velocity_induced_bound_2D(
     panel::Panel, 
-    evaluation_point::Vector{Float64}
+    evaluation_point::PosVector
 )
     # r3 perpendicular to the bound vortex
     r3 = evaluation_point - (panel.bound_point_1 + panel.bound_point_2) / 2

src/wing_aerodynamics.jl

@@ -83,10 +83,10 @@ end
 Structure to hold calculated panel properties.
 """
 struct PanelProperties
-    aero_centers::Vector{Vector{Float64}}
-    control_points::Vector{Vector{Float64}}
-    bound_points_1::Vector{Vector{Float64}}
-    bound_points_2::Vector{Vector{Float64}}
+    aero_centers::Vector{PosVector}
+    control_points::Vector{PosVector}
+    bound_points_1::Vector{PosVector}
+    bound_points_2::Vector{PosVector}
     x_airf::Vector{Vector{Float64}}
     y_airf::Vector{Vector{Float64}}
     z_airf::Vector{Vector{Float64}}

src/wing_geometry.jl

@@ -62,8 +62,8 @@ mutable struct Wing
 end
 
 """
-    add_section!(wing::Wing, LE_point::Vector{Float64}, 
-                TE_point::Vector{Float64}, aero_input::Vector{Any})
+    add_section!(wing::Wing, LE_point::PosVector, 
+                TE_point::PosVector, aero_input::Vector{Any})
 
 Add a new section to the wing.
 """

test/test_semi_infinite_filament.jl

@@ -3,7 +3,7 @@ using LinearAlgebra
 using Test
 using BenchmarkTools
 
-function create_test_filament()
+function create_test_filament2()
     x1 = [0.0, 0.0, 0.0]
     direction = [1.0, 0.0, 0.0]
     filament_direction = 1
@@ -41,7 +41,7 @@ end
     work_vectors = ntuple(_ -> Vector{Float64}(undef, 3), 10)
 
     @testset "Allocation Tests" begin
-        filament = create_test_filament()
+        filament = create_test_filament2()
         control_point = [0.5, 0.5, 2.0]
         induced_velocity = zeros(3)
 
@@ -60,7 +60,7 @@ end
     end
 
     @testset "Calculate Induced Velocity" begin
-        filament = create_test_filament()
+        filament = create_test_filament2()
         control_point = [0.5, 0.5, 2.0]
         induced_velocity = zeros(3)
 
@@ -83,7 +83,7 @@ end
     end
 
     @testset "Point on Filament" begin
-        filament = create_test_filament()
+        filament = create_test_filament2()
         test_points = [
             [0.0, 0.0, 0.0],  # Start point
             [0.5, 0.0, 0.0],  # Along filament
@@ -106,7 +106,7 @@ end
     end
 
     @testset "Different Gamma Values" begin
-        filament = create_test_filament()
+        filament = create_test_filament2()
         control_point = [0.5, 1.0, 0.0]
         v1 = zeros(3)
         v2 = zeros(3)
@@ -121,7 +121,7 @@ end
     end
 
     @testset "Symmetry" begin
-        filament = create_test_filament()
+        filament = create_test_filament2()
         vel_pos = zeros(3)
         vel_neg = zeros(3)