Rename the *_array locals to _dist, matching the per-panel fields they hold

[1-Bort-1]

TL;DR

The 22 locals and arguments ending in _array (per-panel data, some 1D and some P×3) now end in _dist, calc_norm_array! is now calc_norm_dist!, and find_center_of_pressure takes force and moment. "Array" says nothing about the shape, and the struct fields holding the same data already end in _dist.

The naming decision

#147 asked for vector/matrix (or _vec). I went with _dist for everything per-panel, whether it is 1D or 2D, for three reasons:

• The top of src/solver.jl already sets the rule: "Variables ending in _dist: per-panel distributions".
• The fields these locals read from are already _dist: VSMSolution._x_airf_dist, _va_dist, _chord_dist, and LoopResult.va_norm_dist/va_unit_dist.
• solver.jl was already passing cl_dist and chord_array in the same call.

With _vec/_mat, a local and the field it reads would have different names (x_airf_mat = solver.sol._x_airf_dist). The shape is already in the type, and the docstrings give it where it matters.

Only the suffix changes; the rest of each name stays (panel_width_array → panel_width_dist, not the field's width_dist). That keeps every rename one mechanical rule. The two exceptions are force_array and moment_array: each holds one 3-vector, not a per-panel quantity, so they lose the suffix. No clashes: before renaming I checked that no new name already exists in the same function.

No public API moves. Everything renamed is a local, a positional argument, or the private calc_norm_array!. Nothing renamed is exported, a struct field, or a keyword.

Also fixed in lines this PR already touches

• In test_body_aerodynamics.jl, both AIC testsets sized va_norm_dist/va_unit_dist with length(coord). coord is a matrix, so that counts elements, not panels. They now use length(body_aero.panels). The test result can't change, because calculate_AIC_matrices! only reads rows 1:P.
• Three docstring signatures:
  • update_effective_angle_of_attack! was documented under the name of a function that no longer exists (..._if_VSM) and left out alpha_corrected.
  • calculate_results left out reference_point and its keywords.
  • calculate_AIC_matrices! left out target.
• The MWEs (mwes/mwe_01.jl, mwe_warntype.jl) import calc_norm_array!, so they follow the rename.

Left for later

• The va naming (va_distribution next to va_dist, etc.) is One name per apparent-wind quantity: va, v_a, _va and va_*... #337, part 3 of Refactoring part III #147.
• Some per-panel locals never had _array and still have no suffix, e.g. induced_velocity_all and relative_velocity_crossz in gamma_loop!, or alpha_corrected and f_body_3D in calculate_results. They'd fit alongside One name per apparent-wind quantity: va, v_a, _va and va_*... #337.
• Build a Solver from VSMSettings or from panel and section counts, deprecate the body_aero constructors, and check the sizes in solve! #340 edits src/solver.jl and test/solver/test_solver.jl but no renamed line, so whichever merges second should rebase cleanly.

Verification

• Reproduced first: n/a, pure rename. grep -rnE '\w_array\b' over src test mwes examples docs now finds nothing (only old CHANGELOG.md entries mention _array).

• Tests, run in the worktree's session on the test env:

  File	Passed
  body_aerodynamics/test_body_aerodynamics.jl	4858/4858
  body_aerodynamics/test_results.jl	30/30
  solver/test_solver.jl	34/34
  solver/test_flow_curvature.jl	39/39
  solver/test_unrefined_dist.jl	40/40
  solver/test_forwarddiff.jl	7/7
  bench.jl (allocation checks)	21/21

• Both MWEs parse, and calc_norm_dist! is defined.

• Local CI mirror (Pkg.test(), Julia 1.12.7, fail-fast): PASS in 8 min, exit 0 · GitHub CI: not run yet (it triggers on the pull request)

• Docs build: not run. No public symbol was added or renamed; only private docstrings changed.

• Changelog: none, nothing user-visible changes.

• Risk: someone running an old copy of the MWE scripts, or out-of-tree code calling the private calc_norm_array!, will get an UndefVarError.

Scope

+229 / −239 across 7 files, against #338's head. It is the rename plus the docstring and test-sizing fixes listed above, nothing else. The net −10 lines come from the three docstring signatures being reflowed. Stack: 2/3 of #147: #338 (typed empty containers) → this → #337 (va naming).

Closes #336 · task VortexStepMethod.jl-336

[1-Bort-1]

Independent review (advisory)

Verdict: APPROVE WITH COMMENTS · 1 inline, 0 off the diff

Good

• Rename matches the card: e971c74..HEAD touches only the 7 listed files (+229/−239), and a search of src test mwes examples docs finds no \w_array\b left.
• _dist follows the rule already written at src/solver.jl:8 and the solver.sol._*_dist fields these locals read, so a local and its field now share a name.
• Nothing renamed is part of the API: they are positional parameters, locals and the unexported calc_norm_dist!; keywords (correct_aoa, flow_curvature, force_tol) and struct fields are unchanged.
• The test-sizing fix is right: coord comes from generate_coordinates_el_wing and is a matrix, and calculate_AIC_matrices! only loops over body_aero.panels, so the results can't change.
• The three new docstring signatures match the code, including target=body_aero.AIC, reference_point and both keywords, and all fit within 92 columns (387 is exactly 92).
• The net −10 lines check out: the three reflowed signatures lose 2, 4 and 4 lines.
• Tree is clean and the .agent/ plan and card files are not in the PR's commits.

Not good

• src/body_aerodynamics.jl:616 — The parameters are renamed to force/moment, then aliased straight back to F/M0 (and r0), so the new names are never used past the first line. Either use them in the body or name the parameters F/M0; keeping both leaves two names for the same value.
• The card says only private docstrings changed, but calculate_results is exported and listed in docs/src/functions.md, and the docs build was not run.
• In the calculate_results docstring this PR rewrites, line 756 still says flow_curvature reads body_aero.omega; the code reads body_aero.pitch_rate_dist, which set_va_distribution! can set without any omega.
• test/bench.jl:97 and :189 were rewritten but still run past 92 columns.
• mwes/mwe_01.jl:1 now names solver.sol._va_dist, but the mock two lines down uses a field called va_dist; the header and the code now disagree.

_{claude, rubric CLEAN_CODE.md. A different lab from the implementer
on purpose: a reviewer sharing its blind spots would not flag its mistakes.}

[1-Bort-1]

MINOR: The parameters are renamed to force/moment, then aliased straight back to F/M0 (and r0), so the new names are never used past the first line. Either use them in the body or name the parameters F/M0; keeping both leaves two names for the same value.

[codecov]

Codecov Report

❌ Patch coverage is 98.36066% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/body_aerodynamics.jl	95.83%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[1-Bart-1]

No changelog entry? Is all of this internal?

[1-Bort-1]

Yes, it is all internal, so no changelog entry. Every renamed name is a local, a positional argument (Julia callers can't pass those by name), or the unexported calc_norm_array!. No exported symbol, struct field or keyword changes, and no result changes. The only thing a user could notice is the docstring of the exported calculate_results, which now lists reference_point, correct_aoa and flow_curvature. The function already took all three on main (src/body_aerodynamics.jl:771); the docstring just left them out. Nothing to change in #341.