// The only .m file the simulator puts in scope of a design script. It is not
// a design helper: evaluatePlate's trailer calls it to sample a field (a
// number or a function handle) on the grid matrices and to report a bad
// return value in the script's own terms. Design scripts define whatever
// shape functions they need themselves, at the bottom of the script.

import type { WorkspaceFile } from "numbl";

const SAMPLE = `function v = steelsim_field(f, what, x, y, r, theta)
% Samples a design field (a number or a function handle) on the grid matrices.
if isa(f, 'function_handle')
  try
    v = f(x, y, r, theta);
  catch e
    error('%s: %s', what, e.message);
  end
elseif isnumeric(f) || islogical(f)
  v = f;
else
  error('%s must be a number or a function handle @(x, y, r, theta)', what);
end
if isscalar(v)
  v = double(v) * ones(size(x));
elseif ~isequal(size(v), size(x))
  error('%s returned a %d x %d array for a %d x %d grid; use elementwise operators (.*, ./, .^)', what, size(v, 1), size(v, 2), size(x, 1), size(x, 2));
else
  v = double(v);
end
end
`;

export const RUNTIME_FILES: WorkspaceFile[] = [{ name: "steelsim_field.m", source: SAMPLE }];