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Krzysztof kuhy Rudnicki
ffa5dad02a
The 250-line cap applies to prose too, and the reports were the worst
offenders -- ENUME's projectA.tex alone was 1,876 lines. Each is now a
preamble plus one \input{} per section, which is how a long LaTeX document is
normally organised; not one byte of prose was rewritten.
"The PDF is unchanged" is checked by a script rather than by eye, because
hashing the PDF cannot work: pdflatex stamps a /CreationDate and an /ID into
every build, so two runs of the SAME source already differ. tex_fingerprint.sh
compares what a reader sees instead -- page count plus a hash of the extracted
text -- and it is stable across rebuilds of untouched sources, which is the
property that makes it usable as a gate.
It earned its keep immediately. Both ECOTE reports quote an example LaTeX
document inside an lstlisting block, so \end{document} appears in the middle
of the file; splitting on the FIRST one stranded everything after it. Same
page count, different text, caught automatically. EOPSY lab3 exposed a second
bug: a \section{} title that runs onto the next line.
Result: 19 .tex over the cap -> 1. The survivor,
ELAC/.../03-building-nfa-...tex, is 418 lines of consecutive tikz figures
with no subsection to split on and needs a hand-placed boundary.
Verified: 29 splits across two passes (section, then subsection for the
pieces still over), every one reporting `unchanged` from
scripts/tex_fingerprint.sh --check.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0172dj34FDpao6wsix8ZuCzE
75 lines
2.2 KiB
TeX
75 lines
2.2 KiB
TeX
\section{RK4.m}
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\subsection{RK4}
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\begin{simplechar}
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\begin{lstlisting}
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function [x, derivativesTable] = RK4(equations, initialValues, interval, stepSize, maxSteps)
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x = initialValues;
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derivativesTable = buildDerivatiesTable(x, equations);
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% Calculate stepCount
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stepCount = ceil((interval(2) - interval(1)) / stepSize);
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if nargin == 5
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stepCount = min(stepCount, maxSteps - 1);
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end % IF we include max steps in our function input
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% (nargin is number of arguments in input)
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% then choose smaller number between maxSteps and stepCount and choose
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% it for stepCount
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[x, derivativesTable] = rk4Loop(x, stepCount, stepSize, equations, derivativesTable);
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% append arguments to output
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x = [interval(1):stepSize:(stepCount * stepSize); x];
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end
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\end{lstlisting}
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\end{simplechar}
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\subsection{buildDerivatiesTable}
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\begin{simplechar}
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\begin{lstlisting}
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function derivativesTable = buildDerivatiesTable(x, equations)
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derivativesTable = zeros(size(x));
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for eqnum = 1:size(equations, 1)
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derivativesTable(eqnum, 1) = equations{eqnum}(x(:, 1));
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end
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end
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\end{lstlisting}
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\end{simplechar}
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\subsection{rk4Loop}
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\begin{simplechar}
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\begin{lstlisting}
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function [x, derivativesTable] = rk4Loop(x, stepCount, stepSize, equations, derivativesTable)
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for step = 1 : stepCount
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[x, derivativesTable] = rk4stepLoop(x, step, equations, stepSize, derivativesTable);
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end
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end
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\end{lstlisting}
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\end{simplechar}
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\subsection{rk4stepLoop}
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\begin{simplechar}
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\begin{lstlisting}
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function [x, derivativesTable] = rk4stepLoop(x, step, equations, stepSize, derivativesTable)
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stepValue = x(:, step);
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[x, derivativesTable] = equationsLoop(x, equations, stepValue, stepSize, step, derivativesTable);
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end
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\end{lstlisting}
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\end{simplechar}
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\subsection{equationsLoop}
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\begin{simplechar}
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\begin{lstlisting}
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function [x, derivativesTable] = equationsLoop(x, equations, stepValue, stepSize, step, derivativesTable)
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for equationNumber = 1 : 2
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Phi = RK4Phi(equations{equationNumber}, stepValue, stepSize);
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x(equationNumber, step + 1) = x(equationNumber, step) + stepSize * Phi;
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derivativesTable(equationNumber, step + 1) = equations{equationNumber}(x(:, step + 1));
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end
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end
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\end{lstlisting}
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\end{simplechar}
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