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extending lines in 3d graph


How to draw inside a TikZ node, using node style?Make tikzpicture white on blackUse of overlay command in a graphTikZ: Drawing an arc from an intersection to an intersectionRelative transparency in TikZ?Line up nested tikz enviroments or how to get rid of themtikz and pgfdeclareshape why the text is not at the center anchor?How to draw a vector in a 3D spaceAutomatically find which nodes are closest, to aid drawing lines within a TikZ matrixTikz image within a defined box (& the textpos package)






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








2















How can I extend the two lines I have through this 3d graph? Kind of like this picture, where the red lines would be dotted lines showing the line going through the two points. I thought I could simply multiply both values by a scalar vector, but it didn't work.
enter image description here



documentclassarticle
usepackage[margin=1in]geometry
usepackagetikz, tikz-3dplot
usepackageamsmath
begindocument
tdplotsetmaincoords75135
begintikzpicture [scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
vector/.style=-stealth,black,very thick,
vector guide/.style=dashed,black,thick]

%standard tikz coordinate definition using x, y, z coords
coordinate (origin) at (0,0,0);
coordinate (a) at (-3,0,1);
coordinate (b) at (0,1,2);
coordinate (c) at (2,-1,1);
coordinate (d) at (1,2,0);

%draw axes
draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

% Draw two points
draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

%draw guide lines to components
draw[vector guide] (origin) -- (a);
draw[vector guide] (origin) -- (b);
draw[vector guide] (origin) -- (c);
draw[vector guide] (origin) -- (d);

% Draw parametric lines
draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
endtikzpicture
enddocument









share|improve this question
























  • The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

    – Schrödinger's cat
    7 hours ago

















2















How can I extend the two lines I have through this 3d graph? Kind of like this picture, where the red lines would be dotted lines showing the line going through the two points. I thought I could simply multiply both values by a scalar vector, but it didn't work.
enter image description here



documentclassarticle
usepackage[margin=1in]geometry
usepackagetikz, tikz-3dplot
usepackageamsmath
begindocument
tdplotsetmaincoords75135
begintikzpicture [scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
vector/.style=-stealth,black,very thick,
vector guide/.style=dashed,black,thick]

%standard tikz coordinate definition using x, y, z coords
coordinate (origin) at (0,0,0);
coordinate (a) at (-3,0,1);
coordinate (b) at (0,1,2);
coordinate (c) at (2,-1,1);
coordinate (d) at (1,2,0);

%draw axes
draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

% Draw two points
draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

%draw guide lines to components
draw[vector guide] (origin) -- (a);
draw[vector guide] (origin) -- (b);
draw[vector guide] (origin) -- (c);
draw[vector guide] (origin) -- (d);

% Draw parametric lines
draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
endtikzpicture
enddocument









share|improve this question
























  • The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

    – Schrödinger's cat
    7 hours ago













2












2








2


1






How can I extend the two lines I have through this 3d graph? Kind of like this picture, where the red lines would be dotted lines showing the line going through the two points. I thought I could simply multiply both values by a scalar vector, but it didn't work.
enter image description here



documentclassarticle
usepackage[margin=1in]geometry
usepackagetikz, tikz-3dplot
usepackageamsmath
begindocument
tdplotsetmaincoords75135
begintikzpicture [scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
vector/.style=-stealth,black,very thick,
vector guide/.style=dashed,black,thick]

%standard tikz coordinate definition using x, y, z coords
coordinate (origin) at (0,0,0);
coordinate (a) at (-3,0,1);
coordinate (b) at (0,1,2);
coordinate (c) at (2,-1,1);
coordinate (d) at (1,2,0);

%draw axes
draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

% Draw two points
draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

%draw guide lines to components
draw[vector guide] (origin) -- (a);
draw[vector guide] (origin) -- (b);
draw[vector guide] (origin) -- (c);
draw[vector guide] (origin) -- (d);

% Draw parametric lines
draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
endtikzpicture
enddocument









share|improve this question














How can I extend the two lines I have through this 3d graph? Kind of like this picture, where the red lines would be dotted lines showing the line going through the two points. I thought I could simply multiply both values by a scalar vector, but it didn't work.
enter image description here



documentclassarticle
usepackage[margin=1in]geometry
usepackagetikz, tikz-3dplot
usepackageamsmath
begindocument
tdplotsetmaincoords75135
begintikzpicture [scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
vector/.style=-stealth,black,very thick,
vector guide/.style=dashed,black,thick]

%standard tikz coordinate definition using x, y, z coords
coordinate (origin) at (0,0,0);
coordinate (a) at (-3,0,1);
coordinate (b) at (0,1,2);
coordinate (c) at (2,-1,1);
coordinate (d) at (1,2,0);

%draw axes
draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

% Draw two points
draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

%draw guide lines to components
draw[vector guide] (origin) -- (a);
draw[vector guide] (origin) -- (b);
draw[vector guide] (origin) -- (c);
draw[vector guide] (origin) -- (d);

% Draw parametric lines
draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
endtikzpicture
enddocument






tikz-pgf






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 8 hours ago









Evan KimEvan Kim

2245 bronze badges




2245 bronze badges















  • The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

    – Schrödinger's cat
    7 hours ago

















  • The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

    – Schrödinger's cat
    7 hours ago
















The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

– Schrödinger's cat
7 hours ago





The continuation of a line in 3D is still a line, so you can make the lines longer with’shorten=<something negative>’.

– Schrödinger's cat
7 hours ago










1 Answer
1






active

oldest

votes


















4















You can add a some multiple of vectors using the calc library, which gets auto-loaded with tikz-3dplot. E.g.



draw (c) -- ($(c)+0.5*($(c)-(d)$)$);


draws from c to c plus 0.5 times c-d. This and further examples are contained in



documentclassarticle
usepackage[margin=1in]geometry
usepackagetikz, tikz-3dplot
usepackageamsmath
begindocument
tdplotsetmaincoords75135
begintikzpicture[scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
vector/.style=-stealth,black,very thick,
vector guide/.style=dashed,black,thick,
vector extension/.style=densely dashed,red,-stealth]

%standard tikz coordinate definition using x, y, z coords
coordinate (origin) at (0,0,0);
coordinate (a) at (-3,0,1);
coordinate (b) at (0,1,2);
coordinate (c) at (2,-1,1);
coordinate (d) at (1,2,0);
draw[vector extension] (c) -- ($(c)+0.5*($(c)-(d)$)$);
draw[vector extension] (d) -- ($(d)+0.5*($(d)-(c)$)$);
draw[vector extension] (a) -- ($(a)+0.5*($(a)-(b)$)$);
draw[vector extension] (b) -- ($(b)+0.5*($(b)-(a)$)$);
%draw axes
draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

% Draw two points
draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

%draw guide lines to components
draw[vector guide] (origin) -- (a);
draw[vector guide] (origin) -- (b);
draw[vector guide] (origin) -- (c);
draw[vector guide] (origin) -- (d);

% Draw parametric lines
draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
endtikzpicture
enddocument


enter image description here






share|improve this answer



























    Your Answer








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    1 Answer
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    active

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    4















    You can add a some multiple of vectors using the calc library, which gets auto-loaded with tikz-3dplot. E.g.



    draw (c) -- ($(c)+0.5*($(c)-(d)$)$);


    draws from c to c plus 0.5 times c-d. This and further examples are contained in



    documentclassarticle
    usepackage[margin=1in]geometry
    usepackagetikz, tikz-3dplot
    usepackageamsmath
    begindocument
    tdplotsetmaincoords75135
    begintikzpicture[scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
    vector/.style=-stealth,black,very thick,
    vector guide/.style=dashed,black,thick,
    vector extension/.style=densely dashed,red,-stealth]

    %standard tikz coordinate definition using x, y, z coords
    coordinate (origin) at (0,0,0);
    coordinate (a) at (-3,0,1);
    coordinate (b) at (0,1,2);
    coordinate (c) at (2,-1,1);
    coordinate (d) at (1,2,0);
    draw[vector extension] (c) -- ($(c)+0.5*($(c)-(d)$)$);
    draw[vector extension] (d) -- ($(d)+0.5*($(d)-(c)$)$);
    draw[vector extension] (a) -- ($(a)+0.5*($(a)-(b)$)$);
    draw[vector extension] (b) -- ($(b)+0.5*($(b)-(a)$)$);
    %draw axes
    draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
    draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
    draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

    % Draw two points
    draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
    draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
    draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
    draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

    %draw guide lines to components
    draw[vector guide] (origin) -- (a);
    draw[vector guide] (origin) -- (b);
    draw[vector guide] (origin) -- (c);
    draw[vector guide] (origin) -- (d);

    % Draw parametric lines
    draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
    draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
    endtikzpicture
    enddocument


    enter image description here






    share|improve this answer





























      4















      You can add a some multiple of vectors using the calc library, which gets auto-loaded with tikz-3dplot. E.g.



      draw (c) -- ($(c)+0.5*($(c)-(d)$)$);


      draws from c to c plus 0.5 times c-d. This and further examples are contained in



      documentclassarticle
      usepackage[margin=1in]geometry
      usepackagetikz, tikz-3dplot
      usepackageamsmath
      begindocument
      tdplotsetmaincoords75135
      begintikzpicture[scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
      vector/.style=-stealth,black,very thick,
      vector guide/.style=dashed,black,thick,
      vector extension/.style=densely dashed,red,-stealth]

      %standard tikz coordinate definition using x, y, z coords
      coordinate (origin) at (0,0,0);
      coordinate (a) at (-3,0,1);
      coordinate (b) at (0,1,2);
      coordinate (c) at (2,-1,1);
      coordinate (d) at (1,2,0);
      draw[vector extension] (c) -- ($(c)+0.5*($(c)-(d)$)$);
      draw[vector extension] (d) -- ($(d)+0.5*($(d)-(c)$)$);
      draw[vector extension] (a) -- ($(a)+0.5*($(a)-(b)$)$);
      draw[vector extension] (b) -- ($(b)+0.5*($(b)-(a)$)$);
      %draw axes
      draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
      draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
      draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

      % Draw two points
      draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
      draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
      draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
      draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

      %draw guide lines to components
      draw[vector guide] (origin) -- (a);
      draw[vector guide] (origin) -- (b);
      draw[vector guide] (origin) -- (c);
      draw[vector guide] (origin) -- (d);

      % Draw parametric lines
      draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
      draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
      endtikzpicture
      enddocument


      enter image description here






      share|improve this answer



























        4














        4










        4









        You can add a some multiple of vectors using the calc library, which gets auto-loaded with tikz-3dplot. E.g.



        draw (c) -- ($(c)+0.5*($(c)-(d)$)$);


        draws from c to c plus 0.5 times c-d. This and further examples are contained in



        documentclassarticle
        usepackage[margin=1in]geometry
        usepackagetikz, tikz-3dplot
        usepackageamsmath
        begindocument
        tdplotsetmaincoords75135
        begintikzpicture[scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
        vector/.style=-stealth,black,very thick,
        vector guide/.style=dashed,black,thick,
        vector extension/.style=densely dashed,red,-stealth]

        %standard tikz coordinate definition using x, y, z coords
        coordinate (origin) at (0,0,0);
        coordinate (a) at (-3,0,1);
        coordinate (b) at (0,1,2);
        coordinate (c) at (2,-1,1);
        coordinate (d) at (1,2,0);
        draw[vector extension] (c) -- ($(c)+0.5*($(c)-(d)$)$);
        draw[vector extension] (d) -- ($(d)+0.5*($(d)-(c)$)$);
        draw[vector extension] (a) -- ($(a)+0.5*($(a)-(b)$)$);
        draw[vector extension] (b) -- ($(b)+0.5*($(b)-(a)$)$);
        %draw axes
        draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
        draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
        draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

        % Draw two points
        draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
        draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
        draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
        draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

        %draw guide lines to components
        draw[vector guide] (origin) -- (a);
        draw[vector guide] (origin) -- (b);
        draw[vector guide] (origin) -- (c);
        draw[vector guide] (origin) -- (d);

        % Draw parametric lines
        draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
        draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
        endtikzpicture
        enddocument


        enter image description here






        share|improve this answer













        You can add a some multiple of vectors using the calc library, which gets auto-loaded with tikz-3dplot. E.g.



        draw (c) -- ($(c)+0.5*($(c)-(d)$)$);


        draws from c to c plus 0.5 times c-d. This and further examples are contained in



        documentclassarticle
        usepackage[margin=1in]geometry
        usepackagetikz, tikz-3dplot
        usepackageamsmath
        begindocument
        tdplotsetmaincoords75135
        begintikzpicture[scale=1.1, tdplot_main_coords, axis/.style=->,black,thick,
        vector/.style=-stealth,black,very thick,
        vector guide/.style=dashed,black,thick,
        vector extension/.style=densely dashed,red,-stealth]

        %standard tikz coordinate definition using x, y, z coords
        coordinate (origin) at (0,0,0);
        coordinate (a) at (-3,0,1);
        coordinate (b) at (0,1,2);
        coordinate (c) at (2,-1,1);
        coordinate (d) at (1,2,0);
        draw[vector extension] (c) -- ($(c)+0.5*($(c)-(d)$)$);
        draw[vector extension] (d) -- ($(d)+0.5*($(d)-(c)$)$);
        draw[vector extension] (a) -- ($(a)+0.5*($(a)-(b)$)$);
        draw[vector extension] (b) -- ($(b)+0.5*($(b)-(a)$)$);
        %draw axes
        draw[axis] (0,0,0) -- (4,0,0) node[anchor=north east]$x$;
        draw[axis] (0,0,0) -- (0,4,0) node[anchor=north west]$y$;
        draw[axis] (0,0,0) -- (0,0,4) node[anchor=south]$z$;

        % Draw two points
        draw[fill=black] (a) circle[radius=2pt] node[anchor=north west]$a=(-3,0,1)$;
        draw[fill=black] (b) circle[radius=2pt] node[anchor=south west]$b=(0,1,2)$;
        draw[fill=black] (c) circle[radius=2pt] node[anchor=south]$c=(2,-1,1)$;
        draw[fill=black] (d) circle[radius=2pt] node[anchor=north]$d=(1,2,0)$;

        %draw guide lines to components
        draw[vector guide] (origin) -- (a);
        draw[vector guide] (origin) -- (b);
        draw[vector guide] (origin) -- (c);
        draw[vector guide] (origin) -- (d);

        % Draw parametric lines
        draw[line width=1pt] (a) -- (b) node[yshift=0.5cm, anchor=south]$ta + b$;
        draw[line width=1pt] (c) -- (d) node[yshift=0.5cm, anchor=south]$tc + d$;
        endtikzpicture
        enddocument


        enter image description here







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        answered 6 hours ago









        Schrödinger's catSchrödinger's cat

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