diff options
Diffstat (limited to 'graphics/pgf')
| -rw-r--r-- | graphics/pgf/contrib/tikz-nfold/README.md | 2 | ||||
| -rw-r--r-- | graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.pdf | bin | 302791 -> 302816 bytes | |||
| -rw-r--r-- | graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.tex | 2 | ||||
| -rw-r--r-- | graphics/pgf/contrib/tikz-nfold/tikzlibrarynfold.code.tex | 235 |
4 files changed, 156 insertions, 83 deletions
diff --git a/graphics/pgf/contrib/tikz-nfold/README.md b/graphics/pgf/contrib/tikz-nfold/README.md index 6cfba546a4..c146668713 100644 --- a/graphics/pgf/contrib/tikz-nfold/README.md +++ b/graphics/pgf/contrib/tikz-nfold/README.md @@ -1,5 +1,5 @@ # tikz-nfold -## Version 0.1.2 +## Version 0.1.3 This library adds higher-order paths to [TikZ](https://ctan.org/pkg/pgf) and also fixes some graphical issues with TikZ' `double` paths, used e.g. in wide arrows. It is also compatible with [tikz-cd](https://ctan.org/pkg/tikz-cd), adding support for triple and higher arrows. See the [documentation](tikz-nfold-doc.pdf) for full details. diff --git a/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.pdf b/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.pdf Binary files differindex 9a26adfd67..9df9c937ac 100644 --- a/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.pdf +++ b/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.pdf diff --git a/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.tex b/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.tex index 60b1d03202..46132fb7f5 100644 --- a/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.tex +++ b/graphics/pgf/contrib/tikz-nfold/tikz-nfold-doc.tex @@ -329,6 +329,8 @@ Here we see how the commands can be used to customise $n$-fold paths: \section{Version history} \begin{itemize} + \item \textbf{v0.1.3}: Bug fixes + \item \textbf{v0.1.2}: Bug fixes \item \textbf{v0.1.1}: Closing paths and structural changes \begin{itemize} \item Support for closed paths (\texttt{cycle} and \verb|\pgfpathclose|) diff --git a/graphics/pgf/contrib/tikz-nfold/tikzlibrarynfold.code.tex b/graphics/pgf/contrib/tikz-nfold/tikzlibrarynfold.code.tex index da48d7b62b..342191b0ad 100644 --- a/graphics/pgf/contrib/tikz-nfold/tikzlibrarynfold.code.tex +++ b/graphics/pgf/contrib/tikz-nfold/tikzlibrarynfold.code.tex @@ -276,30 +276,41 @@ \newif\ifpgf@nfold@angletoosharp % This stores whether we need the intersections library for an arrow tip but it is not loaded \newif\ifpgf@nfold@intersectionsnotloaded +% This stores whether the currently processed connected sub-path is the final one on this path +\newif\ifpgf@nfold@lastconnsubpath \def\pgf@nfold@parser@handlesegment{% - \if\pgf@nfold@cur@visible 0 + \if\pgf@nfold@cur@visible0 % first, last and moveto are invisible \if\pgf@nfold@cur@type m - % We don't need to do anything for a moveto: If a visible segment follows, it will move to - % its starting location by itself. However, we might need to draw the arrow tip extension + % We don't need to do anything for a moveto; if a visible segment follows, it will move to + % its starting location by itself. However, we might need to draw the arrow tip extension % at the start (if present). + % Draw a tip extension only if all of the following conditions are met: + % 1. There is an Implies tip at the start of this path + % 2. We are currently on the last connected sub-path of this path + % 3. The next segment is visible + % 4. This moveto is the first segment on this path \if\pgf@nfold@start@arrowcode1 - \if\pgf@nfold@prev@type f - \if\pgf@nfold@next@visible1 - \edef\pgf@nfold@macrotoadd{% - \noexpand\pgf@nfold@extendtotip{s}{\pgf@nfold@cur@last}{\pgf@nfold@next@angle@i} - }% - \pgf@nfold@addmacro\pgf@parsed@cur@conn@seg% - % hack: We make the next segment believe that this segment was a lineto - % so the path does not get interrupted - \let\pgf@nfold@cur@type l - \let\pgf@nfold@cur@visible 1 - \let\pgf@nfold@cur@angle@ii\pgf@nfold@next@angle@i - \let\pgf@nfold@cur@tang@ii\pgf@nfold@next@tang@i - \fi - \fi% + \ifpgf@nfold@lastconnsubpath + \if\pgf@nfold@prev@type f + \if\pgf@nfold@next@visible1 + \edef\pgf@nfold@macrotoadd{% + \noexpand\pgf@nfold@extendtotip{s}{\pgf@nfold@cur@last}{\pgf@nfold@next@angle@i} + }% + \pgf@nfold@addmacro\pgf@parsed@cur@conn@seg% + % hack: We make the next segment believe that this segment was a lineto + % so the path does not get interrupted + \let\pgf@nfold@cur@type l + \let\pgf@nfold@cur@visible1 + \let\pgf@nfold@cur@angle@ii\pgf@nfold@next@angle@i + \let\pgf@nfold@cur@tang@ii\pgf@nfold@next@tang@i + \def\pgf@nfold@deltaphi@end{0} + \pgf@nfold@angletoosharpfalse + \fi + \fi% + \fi \fi \fi% \else% @@ -311,25 +322,20 @@ \def\pgf@nfold@shortenstartjoin{0} \def\pgf@nfold@shortenendjoin{0} \pgf@nfold@closejoinsedgecasefalse - \pgf@nfold@angletoosharpfalse % Step 1.1: Make room for the join at the start if needed - \if\pgf@nfold@prev@visible1 + \if\pgf@nfold@prev@visible0 + \pgf@nfold@continuesegmentfalse + \else \pgf@nfold@continuesegmenttrue - % TODO can we just use deltaphi@end from the previous round? - % Compute the angle difference at the start (between -180 and +180 degrees) - % using \pgfmathsubtract@ is more readable and no less efficient than computing this manually - \pgfmathsubtract@{\pgf@nfold@cur@angle@i}{\pgf@nfold@prev@angle@ii} - \pgf@nfold@clampangle - \edef\pgf@nfold@deltaphi@start{\pgfmathresult} + % deltaphi@start can be recycled from deltaphi@end; + % \ifpgf@nfold@angletoosharp is also still set + \let\pgf@nfold@deltaphi@start\pgf@nfold@deltaphi@end + % set \pgf@xb := abs(deltaphi@start) \pgf@xb=\pgf@nfold@deltaphi@start pt\relax \ifdim\pgf@xb<0pt\relax \pgf@xb=-\pgf@xb \fi - \ifdim\pgf@xb>178pt\relax - % we go full backwards, don't relocate the start and disable the join to avoid division by zero - % don't need an error message here, it has already been displayed in the previous segment - \pgf@nfold@angletoosharptrue - \else + \ifpgf@nfold@angletoosharp\else \ifdim\pgf@xb>0.5pt\relax % make room for the start join if the angle is nonzero; % shortenstartjoin := hwidth*tan(.5*abs(deltaphi@start)) @@ -352,8 +358,7 @@ \pgfmathveclen@{\pgfmathresult}{\pgf@sys@tonumber\pgf@yb} \pgfextract@process\pgf@nfold@cur@supporta{\pgfpointadd% {\pgf@nfold@cur@first}% - % TODO migrate to tangent - {\pgfqpointpolar{\pgf@nfold@cur@angle@i}{\pgfmathresult pt}}}% + {\pgfqpointscale{\pgfmathresult}{\pgf@nfold@cur@tang@i}}}% \else % special treatment for singular curves (supporta = first) to avoid rounding error glitches. % In this special case, a slight corner at the end of the join is unavoidable unless we @@ -363,15 +368,15 @@ \fi \fi \fi - \else - \pgf@nfold@continuesegmentfalse \fi % Step 1.2: Make room for the join at the end if needed \if\pgf@nfold@next@visible1 - % Compute the angle difference at the start (between -180 and +180 degrees) + % Compute the angle difference at the end (between -180 and +180 degrees) % using \pgfmathsubtract@ is more readable and no less efficient than computing this manually \pgfmathsubtract@{\pgf@nfold@next@angle@i}{\pgf@nfold@cur@angle@ii} \pgf@nfold@clampangle + % Edge case handling: If the next segment is a closepath and has length zero, deltaphi is set + % to zero to prevent glitches (a zero length segment has no well-defined angle anyway) \edef\pgf@nfold@deltaphi@end{\pgfmathresult} \pgf@xb=\pgf@nfold@deltaphi@end pt\relax \ifdim\pgf@xb<0pt\relax @@ -381,6 +386,7 @@ \pgfutil@packagewarning{tikz-nfold}{Angle too sharp, expect visual errors} \pgf@nfold@angletoosharptrue \else + \pgf@nfold@angletoosharpfalse \ifdim\pgf@xb>0.5pt\relax % make room for the start join if the angle is nonzero % shortenendjoin := hwidth*tan(.5*abs(deltaphi@end)) @@ -403,11 +409,10 @@ \pgfmathveclen@{\pgf@sys@tonumber\pgf@x}{\pgf@sys@tonumber\pgf@y} \ifdim\pgfmathresult pt>0.1pt\relax \pgfmathveclen@{\pgfmathresult}{\pgf@sys@tonumber\pgf@yb} - % can use qpoint and minus because \pgfmathresult is guaranteed to be positive \pgfextract@process\pgf@nfold@cur@supportb{\pgfpointadd% {\pgf@nfold@cur@last}% - % TODO migrate to tangent - {\pgfqpointpolar{\pgf@nfold@cur@angle@ii}{-\pgfmathresult pt}}}% + % can use qpointscale and a minus because \pgfmathresult is guaranteed to be positive + {\pgfqpointscale{-\pgfmathresult}{\pgf@nfold@cur@tang@ii}}}% \else \let\pgf@nfold@cur@supportb\pgf@nfold@cur@movedlast \fi @@ -416,7 +421,7 @@ \fi % Step 1.3: Detect an edge case % This edge case appears whenever the current segment is such a short line that we would - % have to reduce its length to less than zero to make space for the joins. In such cases, + % have to reduce its length to less than zero to make room for the joins. In such cases, % the line is not drawn at all, and slight modifications must be made to the joins to ensure % a correct output (i.e. one join is immediately followed by the next without a segment in between). % @@ -441,7 +446,7 @@ % If the previous segment is a moveto and the current segment is a "close joins" edge case, % nothing needs to be drawn here (the relevant draw call will be made at the join of the subsequent % segment). We must therefore make sure that we move to the correct end point of this segment. - % Counterintuitively, this is given by the offset of \pgf@nfold@cur@movedfirst since the start and end + % Counterintuitively, this is given by the offset of \pgf@nfold@cur@movedFIRST since the start and end % are reversed in the edge case. \edef\pgf@nfold@macrotoadd{% \noexpand\pgf@nfold@token@edgecase@movetostart{\pgf@nfold@cur@movedfirst}{\pgf@nfold@cur@angle@i}% @@ -451,18 +456,27 @@ \else % If we draw the join when the start angle is close to 180 degrees, we get a division by zero \ifpgf@nfold@angletoosharp\else - \pgf@nfold@parser@handlejoin + \if\pgf@nfold@cur@type z\else + \pgf@nfold@parser@handlejoin + \fi \fi \fi - % Step 2.2: Store where the current (non-offset) end point was relocated + % Step 2.2: Store information that may be needed later + % Step 2.2.1: Store where the current (non-offset) end point was relocated % in order to make space for the end join. This may be used if the next % segment begins with a join \let\pgf@nfold@prev@segment@end\pgf@nfold@cur@movedlast + % Step 2.2.2: Store the tangent of the first proper segment of closed path. + % This is needed in case the \pgfpathclose-segment has length zero, + % since in that case its tangent cannot be computed. + \if\pgf@nfold@cur@type i + \let\pgf@nfold@connsubpath@tang@i\pgf@nfold@next@tang@i% + \let\pgf@nfold@connsubpath@angle@i\pgf@nfold@next@angle@i% + \fi % % Step 3: Draw the new segment. % % The value of \ifpgf@nfold@continuesegment decides whether we start with a moveto. - % curveto \if\pgf@nfold@cur@type l % In the edge case, one join is followed immediately by the next. The line segment % thus has a negative length and will be skipped. @@ -481,6 +495,11 @@ \def\pgf@nfold@macrotoadd{\pgf@nfold@token@closepath}% \pgf@nfold@addmacro\pgf@parsed@cur@conn@seg% \fi + \if\pgf@nfold@cur@type z + % zero and non-zero closepath's differ in the join handling, but are identical in rendering + \def\pgf@nfold@macrotoadd{\pgf@nfold@token@closepath}% + \pgf@nfold@addmacro\pgf@parsed@cur@conn@seg% + \fi \if\pgf@nfold@cur@type c \ifpgf@nfold@continuesegment \pgf@subdividecurve{\pgf@nfold@cur@movedfirst}{\pgf@nfold@cur@supporta}{\pgf@nfold@cur@supportb}{\pgf@nfold@cur@movedlast}{\pgf@offset@max@recursion}{0}{\pgf@nfold@addcurvesegment@callback@continue} @@ -779,55 +798,59 @@ % % In order to correctly implement \pgfpathclose we already need to know about % the \pgfpathclose (and the penultimate point) at the beginning of this -% connected segment as these data affect the first/last join. -% We therefore parse one connected segment of the softpath and store it in a modified -% form in \pgf@cur@conn@segment. When reaching the end of the connected segment we call -% the proper parser to turn \pgf@cur@conn@segment into a parsed path. We do this for -% all connected segments and concatenate all the parsed paths. +% connected sub-path as these data affect the first/last join. +% We therefore parse one connected sub-path of the softpath and store it in a modified +% form in \pgf@cur@conn@subpath. When reaching the end of the connected sub-path we call +% the proper parser to turn \pgf@cur@conn@subpath into a parsed path. We do this for +% all connected sub-paths and concatenate all the parsed paths. % \def\pgf@nfold@parsesoftpath#1#2{% - \let\pgf@cur@conn@segment\pgfutil@empty% - \let\pgf@all@parsed@segments\pgfutil@empty% + \let\pgf@cur@conn@subpath\pgfutil@empty% + \let\pgf@all@parsed@subpaths\pgfutil@empty% \edef\pgf@nfold@parser@last@moveto{{\the\pgf@path@lastx}{\the\pgf@path@lasty}}% \let\pgf@nfold@last@closepath@from\pgfutil@empty% \pgf@nfold@parse@setupfirst% \expandafter\pgf@nfold@@parsesoftpath#1\pgf@stop{}{}% - \let#2\pgf@all@parsed@segments% + \let#2\pgf@all@parsed@subpaths% }% \def\pgf@nfold@@parsesoftpath#1#2#3{% \let\pgf@next\pgf@nfold@@parsesoftpath% \ifx#1\pgf@stop% \def\pgf@nfold@macrotoadd{\pgf@nfold@parselast}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% - \pgf@nfold@process@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% + \pgf@nfold@lastconnsubpathtrue% + \pgf@nfold@process@conn@subpath% \let\pgf@next\relax% \else% \ifx#1\pgfsyssoftpath@movetotoken% - \ifx\pgf@cur@conn@segment\pgfutil@empty% + \ifx\pgf@cur@conn@subpath\pgfutil@empty% % This case happens for the very first segment or for double movetos. % We need special treatment here, as otherwise the arrow tip extension % does not work correctly. The \pgf@nfold@parsemoveto will be called - % in \pgf@nfold@process@conn@segment. + % in \pgf@nfold@process@conn@subpath. \def\pgf@nfold@parser@last@moveto{{#2}{#3}}% - % Make sure \pgf@cur@conn@segment is no longer empty so double movetos are not + % Make sure \pgf@cur@conn@subpath is no longer empty so double movetos are not % treated the same as single movetos. This is also relevant to arrow tip extensions - \def\pgf@cur@conn@segment{\relax}% + \def\pgf@cur@conn@subpath{\relax}% \else% \def\pgf@nfold@macrotoadd{\pgf@nfold@parsemoveto{#2}{#3}}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% - % A moveto marks the beginning/end of one connected segment - \pgf@nfold@process@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% + \pgf@nfold@lastconnsubpathfalse% + % A moveto marks the beginning/end of one connected sub-path + \pgf@nfold@process@conn@subpath% \let\pgf@nfold@last@closepath@from\pgfutil@empty% - \let\pgf@cur@conn@segment\pgfutil@empty% + \let\pgf@cur@conn@subpath\pgfutil@empty% + % set up "first" again which may be needed for the arrow tip extension + \pgf@nfold@parse@setupfirst% \def\pgf@nfold@parser@last@moveto{{#2}{#3}}% \fi \else% \ifx#1\pgfsyssoftpath@linetotoken% \def\pgf@nfold@macrotoadd{\pgf@nfold@parselineto{#2}{#3}}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% \else% \ifx#1\pgfsyssoftpath@curvetosupportatoken% \def\pgf@nfold@parse@supporta{{#2}{#3}}% @@ -837,19 +860,19 @@ \else% \ifx#1\pgfsyssoftpath@curvetotoken% \edef\pgf@nfold@macrotoadd{\noexpand\pgf@nfold@parsecurveto\pgf@nfold@parse@supporta\pgf@nfold@parse@supportb{#2}{#3}}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% \else% \ifx#1\pgfsyssoftpath@closepathtoken% \let\pgf@nfold@last@closepath@from\pgf@nfold@parser@previous@pt% \def\pgf@nfold@macrotoadd{\pgf@nfold@parseclosepath{#2}{#3}}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% \else% \ifx#1\pgfsyssoftpath@rectcornertoken% \def\pgf@nfold@parse@rectcorner{{#2}{#3}}% \else% \ifx#1\pgfsyssoftpath@rectsizetoken% \edef\pgf@nfold@macrotoadd{\noexpand\pgf@nfold@parserect\pgf@nfold@parse@rectcorner{#2}{#3}}% - \pgf@nfold@addmacro\pgf@cur@conn@segment% + \pgf@nfold@addmacro\pgf@cur@conn@subpath% \else% \pgfutil@packageerror{tikz-nfold}{Unrecognised soft path token `#1'}{}% \fi% @@ -862,27 +885,30 @@ \fi% \fi% \def\pgf@nfold@parser@previous@pt{{#2}{#3}}% + % store the last two segments, as they might be needed for zero-length \pgfpathclose-segments + \let\pgf@nfold@sectolast@segment\pgf@nfold@last@segment% + \let\pgf@nfold@last@segment\pgf@nfold@macrotoadd% \pgf@next}% -\def\pgf@nfold@process@conn@segment{% +\def\pgf@nfold@process@conn@subpath{% \let\pgf@parsed@cur@conn@seg\pgfutil@empty% \ifx\pgf@nfold@last@closepath@from\pgfutil@empty% \expandafter\pgf@nfold@parsemoveto\pgf@nfold@parser@last@moveto% \else% - % This connected segment ends on a closepath. In order to get - % the join right, we prepend the current segment with an invisible line - % identical to the line of the \pgfpathclose. This way, + % This connected sub-path ends on a closepath. In order to get + % the join right, we prepend the current sub-path with an invisible line + % identical to the line of the \pgfpathclose. \expandafter\pgf@nfold@parsemoveto\pgf@nfold@last@closepath@from% \expandafter\pgf@nfold@parseinvisibleline\pgf@nfold@parser@last@moveto% \fi% - \pgf@cur@conn@segment% + \pgf@cur@conn@subpath% \let\pgf@nfold@macrotoadd\pgf@parsed@cur@conn@seg% - \pgf@nfold@addmacro\pgf@all@parsed@segments% + \pgf@nfold@addmacro\pgf@all@parsed@subpaths% } % % Values for \pgf@nfold@next@type: -% f=first, m=moveto, c=curveto, l=lineto, r=rect, o=closepath, t=last, i=invisibleline +% f=first, m=moveto, c=curveto, l=lineto, r=rect, o=closepath, z=zero length closepath, t=last, i=invisibleline % \def\pgf@nfold@parsemoveto#1#2{% @@ -939,15 +965,57 @@ \def\pgf@nfold@parseclosepath#1#2{% \pgf@process{\pgfpointdiff{\pgf@nfold@next@last}{\pgf@x#1\pgf@y#2}}% % closepath segments should always be processed even if they have zero length - \pgf@nfold@parse@line@common{#1}{#2}{o}% + \pgfpointtaxicabnorm\pgf@xa% + \ifdim\pgf@xa<0.1pt\relax% + \pgf@nfold@parse@closepath@zerolength{#1}{#2}% + \else% + \pgf@nfold@parse@line@common{#1}{#2}{o}% + \fi% }% +\def\pgf@nfold@parse@closepath@zerolength#1#2{% + \pgf@nfold@parser@moveup% + \let\pgf@nfold@next@type=z% + \let\pgf@nfold@next@visible=1% + % Set the start and end tangent to the tangent of the first segment + \let\pgf@nfold@next@tang@i\pgf@nfold@connsubpath@tang@i + \let\pgf@nfold@next@tang@ii\pgf@nfold@connsubpath@tang@i + \let\pgf@nfold@next@angle@i\pgf@nfold@connsubpath@angle@i + \let\pgf@nfold@next@angle@ii\pgf@nfold@connsubpath@angle@i + \let\pgf@nfold@next@first\pgf@nfold@cur@last + % If problems arise, we need to put a fake point here (like \pgf@nfold@next@first + \pgf@nfold@next@tang@i) + \def\pgf@nfold@next@last{\pgf@x#1\pgf@y#2}% + \pgf@nfold@parser@handlesegment% +} + \def\pgf@nfold@parseinvisibleline#1#2{% \pgf@process{\pgfpointdiff{\pgf@nfold@next@last}{\pgf@x#1\pgf@y#2}}% - % invisibleline segments should always be processed even if they have zero length. + \pgfpointtaxicabnorm\pgf@xa% + % In order to correctly render the start/end join in a closed path, + % the \pgfpathclose segment is copied to the start of the path as an invisible line. % Counterintuitively, an "invisibleline" segment has next@visible=1 because % we want its end join to be rendered. - \pgf@nfold@parse@line@common{#1}{#2}{i}% + % In case the \pgfpathclose segment has non-zero length, we can just use a copy of + % this segment for the invisible line. Otherwise, the invisble line segment must will receive + % the same angle/tangent as the last finite-sized segment, which is the second-to-last + % segment overall (cached in \pgf@nfold@sectolast@segment). + \ifdim\pgf@xa>.1pt\relax% + \pgf@nfold@parse@line@common{#1}{#2}{i}% + \else% + \begingroup% + % find the tangent of the second-to-last segment + \let\pgf@nfold@parser@handlesegment\relax% + \pgf@nfold@sectolast@segment% + \global\let\pgf@nfold@tmp\pgf@nfold@next@tang@ii% + \endgroup% + % Construct an invisible line with length 1pt and the correct tangent. + % This step might not be needed since the join computations only require the tangent, + % but the invisibleline segment would be inconsistent otherwise, so better play it safe. + \pgfextract@process\pgf@nfold@next@first{\pgfpointdiff{\pgf@nfold@tmp}{\pgfqpoint{#1}{#2}}}% + % write the tangent into (\pgf@x, \pgf@y) where the next macro expects it to be + \pgf@nfold@tmp% + \pgf@nfold@parse@line@common{#1}{#2}{i}% + \fi% }% \def\pgf@nfold@parselast{% @@ -1047,14 +1115,17 @@ \let\pgf@nfold@next@visible=0% \edef\pgf@nfold@next@last{\pgf@x\the\pgf@path@lastx\pgf@y\the\pgf@path@lasty}% % the following only need to be set if visible=1 - \let\pgf@nfold@next@tang@i=\pgfpointorigin% - \let\pgf@nfold@next@tang@ii=\pgfpointorigin% - \def\pgf@nfold@next@angle@i{0}% - \def\pgf@nfold@next@angle@ii{0}% - \let\pgf@nfold@next@first\pgfpointorigin% + % TODO these are disabled temporarily; an attempt to read them suggests that there + % is a bug, because their content has no meaning at this point. Consider reenabling + % if compile errors show up, but if they do, the root of the problem is likely to be elsewhere + %\let\pgf@nfold@next@tang@i=\pgfpointorigin% + %\let\pgf@nfold@next@tang@ii=\pgfpointorigin% + % \def\pgf@nfold@next@angle@i{0}% + % \def\pgf@nfold@next@angle@ii{0}% + % \let\pgf@nfold@next@first\pgfpointorigin% % the following only need to be set if type=c - \let\pgf@nfold@next@supporta\pgfpointorigin% - \let\pgf@nfold@next@supportb\pgfpointorigin% + % \let\pgf@nfold@next@supporta\pgfpointorigin% + % \let\pgf@nfold@next@supportb\pgfpointorigin% } \def\pgf@nfold@clampangle{ |