☰

pt를 mm 또는 cm로 변환

tag-icon • tag-icon conversion plain-tex lengths unit-of-measure
pt를 mm 또는 cm로 변환

일반 TeX pt로 변환 mm하거나 TeX으로 변환하는 방법이 있나요 ?cm

답변1

포인트로 주어진 차원을 변환하려면 먼저 차원을 카운터에 저장한 다음 필요한 것으로 변환하십시오. TeX가 치수를 카운터에 저장하면 sp단위로 변환됩니다.

\catcode`@=11
\@tempdimb25.4mm 
\@tempcnta=\@tempdimb
\the\@tempcnta 
\divide\@tempcnta by65536\par 
\the\@tempcnta pt
\bye

모든 단위에서 포인트로의 변환은 좀 더 복잡합니다.

\catcode`@=11
\newdimen\@tempdimb
\newcount\@tempcnta
\def\topoint#1#2{%
\@tempdimb=#1
\@tempcnta=\@tempdimb
\multiply\@tempcnta by10
\divide\@tempcnta by18647 \advance\@tempcnta by1
\multiply\@tempcnta by72 \divide\@tempcnta by2540
\expandafter\def\expandafter#2\expandafter{\the\@tempcnta}}

\topoint{25.4mm}{\test}

\test pt
\bye

답변2

Heiko bigintcalc패키지를 사용하여 eTeX 없이 확장 가능한 솔루션입니다. 실제로 이것은 혼란스럽습니다. eTeX 확장을 사용하는 솔루션 중 하나를 사용해야 합니다.

\input bigintcalc.sty
\catcode`@=11

% Step 1: expand the number.
\def\pttocm#1{\romannumeral\expandafter\pttocm@i\romannumeral-`0#1pt;;;;}
\def\pttocm@i#1{\pttocm@clean\ifcat\relax#1\the\fi#1}
\def\pttocm@clean{\expandafter\pttocm@clean@\romannumeral-`0}
\def\pttocm@clean@#1{%
  \ifcase\ifnum`#1<"2B 1\else\ifnum`#1>"39 1\else 2\fi\fi
  \or\expandafter\pttocm@clean@end
  \or\expandafter\pttocm@clean@do\fi #1}
\def\pttocm@clean@do#1#2;#3;{\pttocm@clean#2;#3#1;}

% Step 2: convert the decimal number to an integer/10^n
\def\pttocm@clean@end#1;#2;{\pttocm@clean@end@#2.;#2;.;!}
\def\pttocm@clean@end@#1.#2;#3.#4;#5!{\pttocm@decimal#4.;;#1#4}
\def\pttocm@decimal#1#2;{\ifx.#1\pttocm@decimal@\fi\pttocm@decimal#2;0}

% Step 3: convert from pt to nm (25400000nm=7227pt)
\def\pttocm@decimal@#1;0#2;#3;{\fi
  \expandafter\expandafter\expandafter\pttocm@result
  \bigintcalcDiv{\bigintcalcMul{25400000}{#3}}{7227#2}.;}

% Step 4: check the sign
\def\pttocm@result#1{%
  \ifx-#1\expandafter\pttocm@result@neg
  \else\expandafter\pttocm@result@pos\fi#1}
\def\pttocm@result@neg-{\expandafter\pttocm@rmstop
  \expandafter-\romannumeral\pttocm@result@pos}
\chardef\pttocm@rmstop=0

% Step 5: shift the period 5 steps to the left, by reversing twice.
\def\pttocm@result@pos#1;{%
  \pttocm@reverse 00000#1%
  {?\pttocm@result@shift;}?;%
  {?\pttocm@result@print;}?;}
\def\pttocm@reverse#1#2;{%
  \pttocm@gobble#1%
  \pttocm@reverse#2;#1}
\def\pttocm@gobble#1{}
\def\pttocm@result@shift#1;#2;#3;#4.#5#6#7#8#9%
  {\pttocm@reverse #4#5#6#7#8#9.}
\def\pttocm@result@print#1;#2;#3;#4;{\pttocm@trimzeros{#4}}

% Step 6: remove spurious zeros.
\def\pttocm@trimzeros#1{\pttocm@trim@#1;\pttocm@trim@ 0;\pttocm@trim@@}
\def\pttocm@trim@#10;#2{#2#1;}
\def\pttocm@trim@@#1;#2;{\pttocm@trim@@@#1}
\def\pttocm@trim@@@#1{%
  \ifx0#1\else\expandafter\pttocm@trim@end\expandafter#1\fi
  \pttocm@trim@@@}
\def\pttocm@trim@end#1#2{%
  \ifx.#1\expandafter\pttocm@rmstop\expandafter0%
  \else\expandafter\pttocm@rmstop\fi #1}
\catcode`@=12

\pttocm{-12.1232pt}

\pttocm{283000000000}

\def\foo{23}
\pttocm{12\foo.1\foo2pt}

\newdimen\testdimen
\testdimen=1cm
\pttocm{\testdimen}

\testdimen=-1mm
\pttocm{\testdimen}

\bye

답변3

eTeX의 도움으로 다음 \scantokens도 \strip@pt가능합니다:

\def\strip#1.#2pt{#1\ifnum#2>0.#2\fi}
\def\convertto#1#2{%
  \expandafter\expandafter\expandafter\strip
  \expandafter\expandafter\scantokens
  \expandafter{\the\dimexpr#2*65536/\number\dimexpr1#1\relax\relax\endinput}}

\convertto{pt}{1pc}

\bye

답변4

다음은 Yiannis의 질문을 조합한 것입니다.차원에서 pt ​​제거Philippe Goutet의 답변mm로 표시되는 다양한 단위(ex, em, in, pt, bp, dd, pc)는 무엇입니까?:

\catcode`@=11
\begingroup
  \catcode `P=12  % digits and punct. catcode
  \catcode `T=12  % digits and punct. catcode
  \lowercase{%
  \def\x{\def\rem@pt##1.##2PT{##1\ifnum##2>\z@.##2\fi}}}
     \expandafter\endgroup\x%
\def\strip@pt{\expandafter\rem@pt\the}
\def\convertto#1#2{\strip@pt\dimexpr #2*65536/\number\dimexpr 1#1\relax\relax}
\catcode`@=12
\convertto{mm}{10pt}
\bye

e-TeX 확장이 필요합니다.

관련 정보