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15
.JuliaFormatter.toml
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15
.JuliaFormatter.toml
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style = "blue"
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margin = 120
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always_for_in = true
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whitespace_ops_in_indices = true
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remove_extra_newlines = true
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import_to_using = true
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pipe_to_function_call = false
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short_to_long_function_def = false
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always_use_return = false
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format_docstrings = true
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conditional_to_if = true
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trailing_comma = true
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join_lines_based_on_source = false
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format_markdown = true
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41
process.jl
41
process.jl
@@ -1,17 +1,15 @@
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using MeshIO
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using MeshIO
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using FileIO
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using FileIO
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using GeometryBasics
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using LinearAlgebra
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using LinearAlgebra
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stl = load(raw"C:\Users\albig\Downloads\cubeblender.stl")
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stl = load(raw"C:\Users\albig\Downloads\cubeblender.stl")
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# stl = load(raw"C:\Coding\stl_read\3DBenchy.stl")
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function get_mass_properties(triangles)
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function get_mass_properties(triangles)
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x = [ [v[1] for v in tri] for tri in triangles] |> x -> reduce(hcat,x)'
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x = reduce(hcat, [[v[1] for v in tri] for tri in triangles])'
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y = [ [v[2] for v in tri] for tri in triangles] |> x -> reduce(hcat,x)'
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y = reduce(hcat, [[v[2] for v in tri] for tri in triangles])'
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z = [ [v[3] for v in tri] for tri in triangles] |> x -> reduce(hcat,x)'
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z = reduce(hcat, [[v[3] for v in tri] for tri in triangles])'
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function subexpression(x)
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function subexpression(x)
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w0, w1, w2 = x[:, 1], x[:, 2], x[:, 3]
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w0, w1, w2 = x[:, 1], x[:, 2], x[:, 3]
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@@ -46,18 +44,27 @@ function get_mass_properties(triangles)
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intg[9] = sum(d1 .* (z0 .* g0y + z1 .* g1y + z2 .* g2y))
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intg[9] = sum(d1 .* (z0 .* g0y + z1 .* g1y + z2 .* g2y))
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intg[10] = sum(d2 .* (x0 .* g0z + x1 .* g1z + x2 .* g2z))
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intg[10] = sum(d2 .* (x0 .* g0z + x1 .* g1z + x2 .* g2z))
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intg = intg ./ [6, 24, 24, 24, 60, 60, 60, 120, 120, 120]
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intg = intg ./ [6, 24, 24, 24, 60, 60, 60, 120, 120, 120]
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volumee = intg[1]
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cog = intg[2:4] / volumee
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volume = intg[1]
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cogsq = cog .^ 2
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center_of_gravity = intg[2:4] / volume
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cogsq = center_of_gravity .^ 2
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inertia = zeros((3, 3))
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inertia = zeros((3, 3))
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inertia[1, 1] = intg[6] + intg[7] - volumee .* (cogsq[2] + cogsq[3])
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inertia[1, 1] = intg[6] + intg[7] - volume .* (cogsq[2] + cogsq[3])
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inertia[2, 2] = intg[5] + intg[7] - volumee .* (cogsq[3] + cogsq[1])
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inertia[2, 2] = intg[5] + intg[7] - volume .* (cogsq[3] + cogsq[1])
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inertia[3, 3] = intg[5] + intg[6] - volumee .* (cogsq[1] + cogsq[2])
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inertia[3, 3] = intg[5] + intg[6] - volume .* (cogsq[1] + cogsq[2])
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inertia[1, 2] = inertia[2, 1] = -(intg[8] - volumee .* cog[1] .* cog[2])
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inertia[1, 2] = inertia[2, 1] = -(intg[8] - volume .* center_of_gravity[1] .* center_of_gravity[2])
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inertia[2, 3] = inertia[3, 2] = -(intg[9] - volumee .* cog[2] .* cog[3])
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inertia[2, 3] = inertia[3, 2] = -(intg[9] - volume .* center_of_gravity[2] .* center_of_gravity[3])
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inertia[1, 3] = inertia[3, 1] = -(intg[10] - volumee .* cog[3] .* cog[1])
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inertia[1, 3] = inertia[3, 1] = -(intg[10] - volume .* center_of_gravity[3] .* center_of_gravity[1])
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return volume, cog, inertia
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return volume, center_of_gravity, inertia
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end
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end
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volumee
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v, cog, inertia = get_mass_properties(stl)
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v
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cog
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cog
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inertia
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inertia
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eigen(inertia)
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