TikZ: Coordinate on shape vertices











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I know that I can draw a rectangle with tikz using draw (0.0,0.0) rectangle (1.0,1.0);. Is there a possibility to determine all 4 edge coordinates directly from the shape?



I do can save the lower left coordinate and the upper right by draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);. But is there a way to get the upper left and bottom right corner directly from the shape?



I know I can calculate them. But are they directly accessible from the shape?





MWE



documentclass{standalone}

usepackage{tikz}
usetikzlibrary{calc}

begin{document}

begin{tikzpicture}

% the rectangle
draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);

% coordinates
draw (lb) circle [radius=2pt];
draw (ru) circle [radius=2pt];

% calculated coordinates
draw[dashed] (lb |- ru) coordinate (lu) circle [radius=2pt];
draw[dashed] (lb -| ru) coordinate (rb) circle [radius=2pt];

end{tikzpicture}

end{document}









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    up vote
    4
    down vote

    favorite












    I know that I can draw a rectangle with tikz using draw (0.0,0.0) rectangle (1.0,1.0);. Is there a possibility to determine all 4 edge coordinates directly from the shape?



    I do can save the lower left coordinate and the upper right by draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);. But is there a way to get the upper left and bottom right corner directly from the shape?



    I know I can calculate them. But are they directly accessible from the shape?





    MWE



    documentclass{standalone}

    usepackage{tikz}
    usetikzlibrary{calc}

    begin{document}

    begin{tikzpicture}

    % the rectangle
    draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);

    % coordinates
    draw (lb) circle [radius=2pt];
    draw (ru) circle [radius=2pt];

    % calculated coordinates
    draw[dashed] (lb |- ru) coordinate (lu) circle [radius=2pt];
    draw[dashed] (lb -| ru) coordinate (rb) circle [radius=2pt];

    end{tikzpicture}

    end{document}









    share|improve this question
























      up vote
      4
      down vote

      favorite









      up vote
      4
      down vote

      favorite











      I know that I can draw a rectangle with tikz using draw (0.0,0.0) rectangle (1.0,1.0);. Is there a possibility to determine all 4 edge coordinates directly from the shape?



      I do can save the lower left coordinate and the upper right by draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);. But is there a way to get the upper left and bottom right corner directly from the shape?



      I know I can calculate them. But are they directly accessible from the shape?





      MWE



      documentclass{standalone}

      usepackage{tikz}
      usetikzlibrary{calc}

      begin{document}

      begin{tikzpicture}

      % the rectangle
      draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);

      % coordinates
      draw (lb) circle [radius=2pt];
      draw (ru) circle [radius=2pt];

      % calculated coordinates
      draw[dashed] (lb |- ru) coordinate (lu) circle [radius=2pt];
      draw[dashed] (lb -| ru) coordinate (rb) circle [radius=2pt];

      end{tikzpicture}

      end{document}









      share|improve this question













      I know that I can draw a rectangle with tikz using draw (0.0,0.0) rectangle (1.0,1.0);. Is there a possibility to determine all 4 edge coordinates directly from the shape?



      I do can save the lower left coordinate and the upper right by draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);. But is there a way to get the upper left and bottom right corner directly from the shape?



      I know I can calculate them. But are they directly accessible from the shape?





      MWE



      documentclass{standalone}

      usepackage{tikz}
      usetikzlibrary{calc}

      begin{document}

      begin{tikzpicture}

      % the rectangle
      draw (0.0,0.0) coordinate (lb) rectangle (1.0,1.0) coordinate (ru);

      % coordinates
      draw (lb) circle [radius=2pt];
      draw (ru) circle [radius=2pt];

      % calculated coordinates
      draw[dashed] (lb |- ru) coordinate (lu) circle [radius=2pt];
      draw[dashed] (lb -| ru) coordinate (rb) circle [radius=2pt];

      end{tikzpicture}

      end{document}






      tikz-pgf coordinates tikz-shape






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      asked 13 hours ago









      krtek

      871820




      871820






















          2 Answers
          2






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          oldest

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          up vote
          2
          down vote













          You could define your own rectangle path. In the MWE



          documentclass[tikz,border=3.14mm]{standalone}
          begin{document}
          begin{tikzpicture}[my rectangle/.style={to path={
          -| coordinate[pos=0.5] (#1-2) (tikztotarget) coordinate (#1-3)
          -| coordinate (#1-4) (tikztostart) coordinate (#1-1) }}]
          draw (0,0) edge[my rectangle=krtek] (1,1);
          foreach X in {1,...,4}
          {draw (krtek-X) circle [radius=2pt];}
          end{tikzpicture}
          end{document}


          the style my rectangle=<coordinate base name> will give the four corners the names coordinate base name-1, ... , coordinate base name-4.



          enter image description here



          And there are, of course, predefined shapes that have the corner coordinates stored in anchors.



          documentclass[tikz,border=3.14mm]{standalone}
          begin{document}
          usetikzlibrary{shapes.geometric}
          begin{tikzpicture}

          % the rectangle
          path (0,0) node[draw,anchor=south west,minimum size=1cm] (R) {};
          foreach X in {45,135,225,315}
          {draw (R.X) circle [radius=2pt];}

          path (2,0) node[draw,anchor=south west,minimum size={sqrt(2)*1cm},regular polygon,regular
          polygon sides=4] (poly) {};

          foreach X in {1,...,4}
          {draw (poly.corner X) circle [radius=2pt];}

          end{tikzpicture}

          end{document}


          enter image description here






          share|improve this answer






























            up vote
            1
            down vote













            If you don't want to explicitely declare coordinates for the corners, you can automatically convert your rectangle into a node with fit library. This way, the resultant node gives you all rectangular anchors without havint to name them.



            Following example shows how to insert rectangular coordinates into fit parameter. The result node is equivalent to previously drawn rectangle (you don't need to draw the previous rectangle, it's just for demonstration purposes).



            documentclass[tikz,border=2mm]{standalone} 
            usetikzlibrary{fit}

            begin{document}
            begin{tikzpicture}

            draw (0,0) rectangle (2,1);
            node[fit={(0,0) (2,1)}, inner sep=0pt, draw=red, opacity=.5] (a) {};

            foreach i in {north east, north west, south east, south west}
            draw (a.i) circle(2pt);
            end{tikzpicture}
            end{document}


            enter image description here






            share|improve this answer





















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              2 Answers
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              2 Answers
              2






              active

              oldest

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              active

              oldest

              votes






              active

              oldest

              votes








              up vote
              2
              down vote













              You could define your own rectangle path. In the MWE



              documentclass[tikz,border=3.14mm]{standalone}
              begin{document}
              begin{tikzpicture}[my rectangle/.style={to path={
              -| coordinate[pos=0.5] (#1-2) (tikztotarget) coordinate (#1-3)
              -| coordinate (#1-4) (tikztostart) coordinate (#1-1) }}]
              draw (0,0) edge[my rectangle=krtek] (1,1);
              foreach X in {1,...,4}
              {draw (krtek-X) circle [radius=2pt];}
              end{tikzpicture}
              end{document}


              the style my rectangle=<coordinate base name> will give the four corners the names coordinate base name-1, ... , coordinate base name-4.



              enter image description here



              And there are, of course, predefined shapes that have the corner coordinates stored in anchors.



              documentclass[tikz,border=3.14mm]{standalone}
              begin{document}
              usetikzlibrary{shapes.geometric}
              begin{tikzpicture}

              % the rectangle
              path (0,0) node[draw,anchor=south west,minimum size=1cm] (R) {};
              foreach X in {45,135,225,315}
              {draw (R.X) circle [radius=2pt];}

              path (2,0) node[draw,anchor=south west,minimum size={sqrt(2)*1cm},regular polygon,regular
              polygon sides=4] (poly) {};

              foreach X in {1,...,4}
              {draw (poly.corner X) circle [radius=2pt];}

              end{tikzpicture}

              end{document}


              enter image description here






              share|improve this answer



























                up vote
                2
                down vote













                You could define your own rectangle path. In the MWE



                documentclass[tikz,border=3.14mm]{standalone}
                begin{document}
                begin{tikzpicture}[my rectangle/.style={to path={
                -| coordinate[pos=0.5] (#1-2) (tikztotarget) coordinate (#1-3)
                -| coordinate (#1-4) (tikztostart) coordinate (#1-1) }}]
                draw (0,0) edge[my rectangle=krtek] (1,1);
                foreach X in {1,...,4}
                {draw (krtek-X) circle [radius=2pt];}
                end{tikzpicture}
                end{document}


                the style my rectangle=<coordinate base name> will give the four corners the names coordinate base name-1, ... , coordinate base name-4.



                enter image description here



                And there are, of course, predefined shapes that have the corner coordinates stored in anchors.



                documentclass[tikz,border=3.14mm]{standalone}
                begin{document}
                usetikzlibrary{shapes.geometric}
                begin{tikzpicture}

                % the rectangle
                path (0,0) node[draw,anchor=south west,minimum size=1cm] (R) {};
                foreach X in {45,135,225,315}
                {draw (R.X) circle [radius=2pt];}

                path (2,0) node[draw,anchor=south west,minimum size={sqrt(2)*1cm},regular polygon,regular
                polygon sides=4] (poly) {};

                foreach X in {1,...,4}
                {draw (poly.corner X) circle [radius=2pt];}

                end{tikzpicture}

                end{document}


                enter image description here






                share|improve this answer

























                  up vote
                  2
                  down vote










                  up vote
                  2
                  down vote









                  You could define your own rectangle path. In the MWE



                  documentclass[tikz,border=3.14mm]{standalone}
                  begin{document}
                  begin{tikzpicture}[my rectangle/.style={to path={
                  -| coordinate[pos=0.5] (#1-2) (tikztotarget) coordinate (#1-3)
                  -| coordinate (#1-4) (tikztostart) coordinate (#1-1) }}]
                  draw (0,0) edge[my rectangle=krtek] (1,1);
                  foreach X in {1,...,4}
                  {draw (krtek-X) circle [radius=2pt];}
                  end{tikzpicture}
                  end{document}


                  the style my rectangle=<coordinate base name> will give the four corners the names coordinate base name-1, ... , coordinate base name-4.



                  enter image description here



                  And there are, of course, predefined shapes that have the corner coordinates stored in anchors.



                  documentclass[tikz,border=3.14mm]{standalone}
                  begin{document}
                  usetikzlibrary{shapes.geometric}
                  begin{tikzpicture}

                  % the rectangle
                  path (0,0) node[draw,anchor=south west,minimum size=1cm] (R) {};
                  foreach X in {45,135,225,315}
                  {draw (R.X) circle [radius=2pt];}

                  path (2,0) node[draw,anchor=south west,minimum size={sqrt(2)*1cm},regular polygon,regular
                  polygon sides=4] (poly) {};

                  foreach X in {1,...,4}
                  {draw (poly.corner X) circle [radius=2pt];}

                  end{tikzpicture}

                  end{document}


                  enter image description here






                  share|improve this answer














                  You could define your own rectangle path. In the MWE



                  documentclass[tikz,border=3.14mm]{standalone}
                  begin{document}
                  begin{tikzpicture}[my rectangle/.style={to path={
                  -| coordinate[pos=0.5] (#1-2) (tikztotarget) coordinate (#1-3)
                  -| coordinate (#1-4) (tikztostart) coordinate (#1-1) }}]
                  draw (0,0) edge[my rectangle=krtek] (1,1);
                  foreach X in {1,...,4}
                  {draw (krtek-X) circle [radius=2pt];}
                  end{tikzpicture}
                  end{document}


                  the style my rectangle=<coordinate base name> will give the four corners the names coordinate base name-1, ... , coordinate base name-4.



                  enter image description here



                  And there are, of course, predefined shapes that have the corner coordinates stored in anchors.



                  documentclass[tikz,border=3.14mm]{standalone}
                  begin{document}
                  usetikzlibrary{shapes.geometric}
                  begin{tikzpicture}

                  % the rectangle
                  path (0,0) node[draw,anchor=south west,minimum size=1cm] (R) {};
                  foreach X in {45,135,225,315}
                  {draw (R.X) circle [radius=2pt];}

                  path (2,0) node[draw,anchor=south west,minimum size={sqrt(2)*1cm},regular polygon,regular
                  polygon sides=4] (poly) {};

                  foreach X in {1,...,4}
                  {draw (poly.corner X) circle [radius=2pt];}

                  end{tikzpicture}

                  end{document}


                  enter image description here







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited 12 hours ago

























                  answered 12 hours ago









                  marmot

                  78.3k487166




                  78.3k487166






















                      up vote
                      1
                      down vote













                      If you don't want to explicitely declare coordinates for the corners, you can automatically convert your rectangle into a node with fit library. This way, the resultant node gives you all rectangular anchors without havint to name them.



                      Following example shows how to insert rectangular coordinates into fit parameter. The result node is equivalent to previously drawn rectangle (you don't need to draw the previous rectangle, it's just for demonstration purposes).



                      documentclass[tikz,border=2mm]{standalone} 
                      usetikzlibrary{fit}

                      begin{document}
                      begin{tikzpicture}

                      draw (0,0) rectangle (2,1);
                      node[fit={(0,0) (2,1)}, inner sep=0pt, draw=red, opacity=.5] (a) {};

                      foreach i in {north east, north west, south east, south west}
                      draw (a.i) circle(2pt);
                      end{tikzpicture}
                      end{document}


                      enter image description here






                      share|improve this answer

























                        up vote
                        1
                        down vote













                        If you don't want to explicitely declare coordinates for the corners, you can automatically convert your rectangle into a node with fit library. This way, the resultant node gives you all rectangular anchors without havint to name them.



                        Following example shows how to insert rectangular coordinates into fit parameter. The result node is equivalent to previously drawn rectangle (you don't need to draw the previous rectangle, it's just for demonstration purposes).



                        documentclass[tikz,border=2mm]{standalone} 
                        usetikzlibrary{fit}

                        begin{document}
                        begin{tikzpicture}

                        draw (0,0) rectangle (2,1);
                        node[fit={(0,0) (2,1)}, inner sep=0pt, draw=red, opacity=.5] (a) {};

                        foreach i in {north east, north west, south east, south west}
                        draw (a.i) circle(2pt);
                        end{tikzpicture}
                        end{document}


                        enter image description here






                        share|improve this answer























                          up vote
                          1
                          down vote










                          up vote
                          1
                          down vote









                          If you don't want to explicitely declare coordinates for the corners, you can automatically convert your rectangle into a node with fit library. This way, the resultant node gives you all rectangular anchors without havint to name them.



                          Following example shows how to insert rectangular coordinates into fit parameter. The result node is equivalent to previously drawn rectangle (you don't need to draw the previous rectangle, it's just for demonstration purposes).



                          documentclass[tikz,border=2mm]{standalone} 
                          usetikzlibrary{fit}

                          begin{document}
                          begin{tikzpicture}

                          draw (0,0) rectangle (2,1);
                          node[fit={(0,0) (2,1)}, inner sep=0pt, draw=red, opacity=.5] (a) {};

                          foreach i in {north east, north west, south east, south west}
                          draw (a.i) circle(2pt);
                          end{tikzpicture}
                          end{document}


                          enter image description here






                          share|improve this answer












                          If you don't want to explicitely declare coordinates for the corners, you can automatically convert your rectangle into a node with fit library. This way, the resultant node gives you all rectangular anchors without havint to name them.



                          Following example shows how to insert rectangular coordinates into fit parameter. The result node is equivalent to previously drawn rectangle (you don't need to draw the previous rectangle, it's just for demonstration purposes).



                          documentclass[tikz,border=2mm]{standalone} 
                          usetikzlibrary{fit}

                          begin{document}
                          begin{tikzpicture}

                          draw (0,0) rectangle (2,1);
                          node[fit={(0,0) (2,1)}, inner sep=0pt, draw=red, opacity=.5] (a) {};

                          foreach i in {north east, north west, south east, south west}
                          draw (a.i) circle(2pt);
                          end{tikzpicture}
                          end{document}


                          enter image description here







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 11 hours ago









                          Ignasi

                          90.3k4163302




                          90.3k4163302






























                               

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