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Relationship between strut and baselineskip


strut and strutboxHow to modify columns/column environments so they resize automatically to the largest column ?Set strut heightDefinition of strut explainedStrutting around: What's the difference between strut, mathstrut and vphantom?Ensuring a paragraph uses at least a given height?Why is `strut` working in these scenarios?Variable-width horizontal rules with cline intrude cell textFirst word hyphenation in parbox with strutbaselineskip param of fontsize doesn't add space between my lines













3















Here, it is said that a strut is defined as:



rule[-.3baselineskip]0ptbaselineskip


However, if I do:



newlengthstrutheight
settoheightstrutheightstrutprintlengthstrutheight
printlengthbaselineskip


It prints:



8.39996pt 12.0pt


8.39996 is equal to 0.7*12. However, what I don't understand is that according to its definition the height of the strut should be baselineskip, because -.3baselineskip only refers to a vertical alignment offset. Why does settoheight on a strut produces this behaviour?










share|improve this question


























    3















    Here, it is said that a strut is defined as:



    rule[-.3baselineskip]0ptbaselineskip


    However, if I do:



    newlengthstrutheight
    settoheightstrutheightstrutprintlengthstrutheight
    printlengthbaselineskip


    It prints:



    8.39996pt 12.0pt


    8.39996 is equal to 0.7*12. However, what I don't understand is that according to its definition the height of the strut should be baselineskip, because -.3baselineskip only refers to a vertical alignment offset. Why does settoheight on a strut produces this behaviour?










    share|improve this question
























      3












      3








      3








      Here, it is said that a strut is defined as:



      rule[-.3baselineskip]0ptbaselineskip


      However, if I do:



      newlengthstrutheight
      settoheightstrutheightstrutprintlengthstrutheight
      printlengthbaselineskip


      It prints:



      8.39996pt 12.0pt


      8.39996 is equal to 0.7*12. However, what I don't understand is that according to its definition the height of the strut should be baselineskip, because -.3baselineskip only refers to a vertical alignment offset. Why does settoheight on a strut produces this behaviour?










      share|improve this question














      Here, it is said that a strut is defined as:



      rule[-.3baselineskip]0ptbaselineskip


      However, if I do:



      newlengthstrutheight
      settoheightstrutheightstrutprintlengthstrutheight
      printlengthbaselineskip


      It prints:



      8.39996pt 12.0pt


      8.39996 is equal to 0.7*12. However, what I don't understand is that according to its definition the height of the strut should be baselineskip, because -.3baselineskip only refers to a vertical alignment offset. Why does settoheight on a strut produces this behaviour?







      vertical-alignment baseline calc strut






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 2 hours ago









      VincentVincent

      1,70421939




      1,70421939




















          2 Answers
          2






          active

          oldest

          votes


















          5














          The height of the whole strut is baselineskip, however it is lowered by 0.3baselineskip form the baseline. Its depth plus its height totals baselineskip:



          documentclassarticle
          begindocument
          newlengthstrutheight
          newlengthstrutdepth
          settoheightstrutheightstrut
          settodepthstrutdepthstrut
          $thestrutheight+thestrutdepth=thebaselineskip$
          enddocument


          this prints 8.39996pt + 3.60004pt = 12.0pt.



          In TeX, the “height” of a box is not its total height, but the height above the baseline, and the “depth” is the amount that box goes below that baseline. And when you do settoheight you get only the height of the box, not the total height.



          You can draw the strut and its height and depth to see:




          enter image description here




          documentclassarticle
          begindocument
          fboxsep0pt
          fboxrule0.1pt

          fboxstrut
          fboxrule0pt0.7baselineskip
          fboxrule[-0.3baselineskip]0pt0.3baselineskip
          enddocument





          share|improve this answer






























            1














            Well, the definition of strut is



            % latex.ltx, line 594:
            defstrutrelaxifmmodecopystrutboxelseunhcopystrutboxfi


            The code rule[-0.3baselineskip]0ptbaselineskip is a less efficient way to say unhcopystrutbox, but amounts to essentially the same. Part of the strut is below the baseline, to cope with characters with descenders like p or y.



            The strutbox is updated whenever a fontsize command is processed:



            % latex.ltx, line 2808:
            defset@fontsize#1#2#3%
            @defaultunits@tempdimb#2ptrelax@nnil
            edeff@sizestrip@pt@tempdimb%
            @defaultunits@tempskipa#3ptrelax@nnil
            edeff@baselineskipthe@tempskipa%
            edeff@linespread#1%
            letbaselinestretchf@linespread
            defsize@update%
            baselineskipf@baselineskiprelax
            baselineskipf@linespreadbaselineskip
            normalbaselineskipbaselineskip
            setboxstrutboxhbox%
            vrule@height.7baselineskip
            @depth.3baselineskip
            @widthz@%
            letsize@updaterelax%



            So the strutbox is a box containing a zero width rule, with height 70% of the baseline skip and depth 30% of the baseline skip.



            You can access the current dimensions as htstrutbox and dpstrutbox:



            documentclassarticle
            begindocument

            thehtstrutbox (height)

            thedpstrutbox (depth)

            thedimexprhtstrutbox+dpstrutbox (total)

            thebaselineskip (baselineskip)

            enddocument


            enter image description here






            share|improve this answer























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              2 Answers
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              2 Answers
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              active

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              5














              The height of the whole strut is baselineskip, however it is lowered by 0.3baselineskip form the baseline. Its depth plus its height totals baselineskip:



              documentclassarticle
              begindocument
              newlengthstrutheight
              newlengthstrutdepth
              settoheightstrutheightstrut
              settodepthstrutdepthstrut
              $thestrutheight+thestrutdepth=thebaselineskip$
              enddocument


              this prints 8.39996pt + 3.60004pt = 12.0pt.



              In TeX, the “height” of a box is not its total height, but the height above the baseline, and the “depth” is the amount that box goes below that baseline. And when you do settoheight you get only the height of the box, not the total height.



              You can draw the strut and its height and depth to see:




              enter image description here




              documentclassarticle
              begindocument
              fboxsep0pt
              fboxrule0.1pt

              fboxstrut
              fboxrule0pt0.7baselineskip
              fboxrule[-0.3baselineskip]0pt0.3baselineskip
              enddocument





              share|improve this answer



























                5














                The height of the whole strut is baselineskip, however it is lowered by 0.3baselineskip form the baseline. Its depth plus its height totals baselineskip:



                documentclassarticle
                begindocument
                newlengthstrutheight
                newlengthstrutdepth
                settoheightstrutheightstrut
                settodepthstrutdepthstrut
                $thestrutheight+thestrutdepth=thebaselineskip$
                enddocument


                this prints 8.39996pt + 3.60004pt = 12.0pt.



                In TeX, the “height” of a box is not its total height, but the height above the baseline, and the “depth” is the amount that box goes below that baseline. And when you do settoheight you get only the height of the box, not the total height.



                You can draw the strut and its height and depth to see:




                enter image description here




                documentclassarticle
                begindocument
                fboxsep0pt
                fboxrule0.1pt

                fboxstrut
                fboxrule0pt0.7baselineskip
                fboxrule[-0.3baselineskip]0pt0.3baselineskip
                enddocument





                share|improve this answer

























                  5












                  5








                  5







                  The height of the whole strut is baselineskip, however it is lowered by 0.3baselineskip form the baseline. Its depth plus its height totals baselineskip:



                  documentclassarticle
                  begindocument
                  newlengthstrutheight
                  newlengthstrutdepth
                  settoheightstrutheightstrut
                  settodepthstrutdepthstrut
                  $thestrutheight+thestrutdepth=thebaselineskip$
                  enddocument


                  this prints 8.39996pt + 3.60004pt = 12.0pt.



                  In TeX, the “height” of a box is not its total height, but the height above the baseline, and the “depth” is the amount that box goes below that baseline. And when you do settoheight you get only the height of the box, not the total height.



                  You can draw the strut and its height and depth to see:




                  enter image description here




                  documentclassarticle
                  begindocument
                  fboxsep0pt
                  fboxrule0.1pt

                  fboxstrut
                  fboxrule0pt0.7baselineskip
                  fboxrule[-0.3baselineskip]0pt0.3baselineskip
                  enddocument





                  share|improve this answer













                  The height of the whole strut is baselineskip, however it is lowered by 0.3baselineskip form the baseline. Its depth plus its height totals baselineskip:



                  documentclassarticle
                  begindocument
                  newlengthstrutheight
                  newlengthstrutdepth
                  settoheightstrutheightstrut
                  settodepthstrutdepthstrut
                  $thestrutheight+thestrutdepth=thebaselineskip$
                  enddocument


                  this prints 8.39996pt + 3.60004pt = 12.0pt.



                  In TeX, the “height” of a box is not its total height, but the height above the baseline, and the “depth” is the amount that box goes below that baseline. And when you do settoheight you get only the height of the box, not the total height.



                  You can draw the strut and its height and depth to see:




                  enter image description here




                  documentclassarticle
                  begindocument
                  fboxsep0pt
                  fboxrule0.1pt

                  fboxstrut
                  fboxrule0pt0.7baselineskip
                  fboxrule[-0.3baselineskip]0pt0.3baselineskip
                  enddocument






                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 2 hours ago









                  Phelype OleinikPhelype Oleinik

                  26.2k54791




                  26.2k54791





















                      1














                      Well, the definition of strut is



                      % latex.ltx, line 594:
                      defstrutrelaxifmmodecopystrutboxelseunhcopystrutboxfi


                      The code rule[-0.3baselineskip]0ptbaselineskip is a less efficient way to say unhcopystrutbox, but amounts to essentially the same. Part of the strut is below the baseline, to cope with characters with descenders like p or y.



                      The strutbox is updated whenever a fontsize command is processed:



                      % latex.ltx, line 2808:
                      defset@fontsize#1#2#3%
                      @defaultunits@tempdimb#2ptrelax@nnil
                      edeff@sizestrip@pt@tempdimb%
                      @defaultunits@tempskipa#3ptrelax@nnil
                      edeff@baselineskipthe@tempskipa%
                      edeff@linespread#1%
                      letbaselinestretchf@linespread
                      defsize@update%
                      baselineskipf@baselineskiprelax
                      baselineskipf@linespreadbaselineskip
                      normalbaselineskipbaselineskip
                      setboxstrutboxhbox%
                      vrule@height.7baselineskip
                      @depth.3baselineskip
                      @widthz@%
                      letsize@updaterelax%



                      So the strutbox is a box containing a zero width rule, with height 70% of the baseline skip and depth 30% of the baseline skip.



                      You can access the current dimensions as htstrutbox and dpstrutbox:



                      documentclassarticle
                      begindocument

                      thehtstrutbox (height)

                      thedpstrutbox (depth)

                      thedimexprhtstrutbox+dpstrutbox (total)

                      thebaselineskip (baselineskip)

                      enddocument


                      enter image description here






                      share|improve this answer



























                        1














                        Well, the definition of strut is



                        % latex.ltx, line 594:
                        defstrutrelaxifmmodecopystrutboxelseunhcopystrutboxfi


                        The code rule[-0.3baselineskip]0ptbaselineskip is a less efficient way to say unhcopystrutbox, but amounts to essentially the same. Part of the strut is below the baseline, to cope with characters with descenders like p or y.



                        The strutbox is updated whenever a fontsize command is processed:



                        % latex.ltx, line 2808:
                        defset@fontsize#1#2#3%
                        @defaultunits@tempdimb#2ptrelax@nnil
                        edeff@sizestrip@pt@tempdimb%
                        @defaultunits@tempskipa#3ptrelax@nnil
                        edeff@baselineskipthe@tempskipa%
                        edeff@linespread#1%
                        letbaselinestretchf@linespread
                        defsize@update%
                        baselineskipf@baselineskiprelax
                        baselineskipf@linespreadbaselineskip
                        normalbaselineskipbaselineskip
                        setboxstrutboxhbox%
                        vrule@height.7baselineskip
                        @depth.3baselineskip
                        @widthz@%
                        letsize@updaterelax%



                        So the strutbox is a box containing a zero width rule, with height 70% of the baseline skip and depth 30% of the baseline skip.



                        You can access the current dimensions as htstrutbox and dpstrutbox:



                        documentclassarticle
                        begindocument

                        thehtstrutbox (height)

                        thedpstrutbox (depth)

                        thedimexprhtstrutbox+dpstrutbox (total)

                        thebaselineskip (baselineskip)

                        enddocument


                        enter image description here






                        share|improve this answer

























                          1












                          1








                          1







                          Well, the definition of strut is



                          % latex.ltx, line 594:
                          defstrutrelaxifmmodecopystrutboxelseunhcopystrutboxfi


                          The code rule[-0.3baselineskip]0ptbaselineskip is a less efficient way to say unhcopystrutbox, but amounts to essentially the same. Part of the strut is below the baseline, to cope with characters with descenders like p or y.



                          The strutbox is updated whenever a fontsize command is processed:



                          % latex.ltx, line 2808:
                          defset@fontsize#1#2#3%
                          @defaultunits@tempdimb#2ptrelax@nnil
                          edeff@sizestrip@pt@tempdimb%
                          @defaultunits@tempskipa#3ptrelax@nnil
                          edeff@baselineskipthe@tempskipa%
                          edeff@linespread#1%
                          letbaselinestretchf@linespread
                          defsize@update%
                          baselineskipf@baselineskiprelax
                          baselineskipf@linespreadbaselineskip
                          normalbaselineskipbaselineskip
                          setboxstrutboxhbox%
                          vrule@height.7baselineskip
                          @depth.3baselineskip
                          @widthz@%
                          letsize@updaterelax%



                          So the strutbox is a box containing a zero width rule, with height 70% of the baseline skip and depth 30% of the baseline skip.



                          You can access the current dimensions as htstrutbox and dpstrutbox:



                          documentclassarticle
                          begindocument

                          thehtstrutbox (height)

                          thedpstrutbox (depth)

                          thedimexprhtstrutbox+dpstrutbox (total)

                          thebaselineskip (baselineskip)

                          enddocument


                          enter image description here






                          share|improve this answer













                          Well, the definition of strut is



                          % latex.ltx, line 594:
                          defstrutrelaxifmmodecopystrutboxelseunhcopystrutboxfi


                          The code rule[-0.3baselineskip]0ptbaselineskip is a less efficient way to say unhcopystrutbox, but amounts to essentially the same. Part of the strut is below the baseline, to cope with characters with descenders like p or y.



                          The strutbox is updated whenever a fontsize command is processed:



                          % latex.ltx, line 2808:
                          defset@fontsize#1#2#3%
                          @defaultunits@tempdimb#2ptrelax@nnil
                          edeff@sizestrip@pt@tempdimb%
                          @defaultunits@tempskipa#3ptrelax@nnil
                          edeff@baselineskipthe@tempskipa%
                          edeff@linespread#1%
                          letbaselinestretchf@linespread
                          defsize@update%
                          baselineskipf@baselineskiprelax
                          baselineskipf@linespreadbaselineskip
                          normalbaselineskipbaselineskip
                          setboxstrutboxhbox%
                          vrule@height.7baselineskip
                          @depth.3baselineskip
                          @widthz@%
                          letsize@updaterelax%



                          So the strutbox is a box containing a zero width rule, with height 70% of the baseline skip and depth 30% of the baseline skip.



                          You can access the current dimensions as htstrutbox and dpstrutbox:



                          documentclassarticle
                          begindocument

                          thehtstrutbox (height)

                          thedpstrutbox (depth)

                          thedimexprhtstrutbox+dpstrutbox (total)

                          thebaselineskip (baselineskip)

                          enddocument


                          enter image description here







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 1 hour ago









                          egregegreg

                          737k8919373265




                          737k8919373265



























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