Problem with using rnd function in Tikz polar coordinates
1
I am trying to draw lines with a different, random length but the same direction. This is what I thought should work, but if I put in any other angle than 90 degrees (for example 30 degrees in this example) the lines don't point in the same direction.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgfmath}
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
draw(current page.south west)++(x pt,0)--++(30:rnd);
}
end{tikzpicture}
end{document}
tikz-pgf pgfmath
asked Feb 20 at 10:51
TobiasTobias
82
add a comment |
1
I am trying to draw lines with a different, random length but the same direction. This is what I thought should work, but if I put in any other angle than 90 degrees (for example 30 degrees in this example) the lines don't point in the same direction.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgfmath}
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
draw(current page.south west)++(x pt,0)--++(30:rnd);
}
end{tikzpicture}
end{document}
tikz-pgf pgfmath
asked Feb 20 at 10:51
TobiasTobias
82
add a comment |
1
1
1
I am trying to draw lines with a different, random length but the same direction. This is what I thought should work, but if I put in any other angle than 90 degrees (for example 30 degrees in this example) the lines don't point in the same direction.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgfmath}
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
draw(current page.south west)++(x pt,0)--++(30:rnd);
}
end{tikzpicture}
end{document}
tikz-pgf pgfmath
asked Feb 20 at 10:51
TobiasTobias
82
I am trying to draw lines with a different, random length but the same direction. This is what I thought should work, but if I put in any other angle than 90 degrees (for example 30 degrees in this example) the lines don't point in the same direction.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgfmath}
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
draw(current page.south west)++(x pt,0)--++(30:rnd);
}
end{tikzpicture}
end{document}
tikz-pgf pgfmath
tikz-pgf pgfmath
asked Feb 20 at 10:51
TobiasTobias
82
asked Feb 20 at 10:51
TobiasTobias
82
asked Feb 20 at 10:51
TobiasTobias
82
asked Feb 20 at 10:51
TobiasTobias
82
asked Feb 20 at 10:51
TobiasTobias
82
82
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
1
Use the pgfmathparse and pgfmathresult for getting a random number.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgf}
pgfmathsetseed{numberpdfrandomseed} % Getting different random numbers. If you don't want, comment this.
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
pgfmathparse{int(rand*10)}letA=pgfmathresult
draw(current page.south west)++(x pt,0)--++(80:A);
}
end{tikzpicture}
end{document}
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like({rnd*cos(80)},{rnd*sin(80)})and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.
– marmot
Feb 20 at 18:23
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
Use the pgfmathparse and pgfmathresult for getting a random number.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgf}
pgfmathsetseed{numberpdfrandomseed} % Getting different random numbers. If you don't want, comment this.
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
pgfmathparse{int(rand*10)}letA=pgfmathresult
draw(current page.south west)++(x pt,0)--++(80:A);
}
end{tikzpicture}
end{document}
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like({rnd*cos(80)},{rnd*sin(80)})and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.
– marmot
Feb 20 at 18:23
add a comment |
1
Use the pgfmathparse and pgfmathresult for getting a random number.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgf}
pgfmathsetseed{numberpdfrandomseed} % Getting different random numbers. If you don't want, comment this.
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
pgfmathparse{int(rand*10)}letA=pgfmathresult
draw(current page.south west)++(x pt,0)--++(80:A);
}
end{tikzpicture}
end{document}
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like({rnd*cos(80)},{rnd*sin(80)})and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.
– marmot
Feb 20 at 18:23
add a comment |
1
1
1
Use the pgfmathparse and pgfmathresult for getting a random number.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgf}
pgfmathsetseed{numberpdfrandomseed} % Getting different random numbers. If you don't want, comment this.
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
pgfmathparse{int(rand*10)}letA=pgfmathresult
draw(current page.south west)++(x pt,0)--++(80:A);
}
end{tikzpicture}
end{document}
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
Use the pgfmathparse and pgfmathresult for getting a random number.
documentclass{scrartcl}
usepackage[papersize={5.5cm,8cm}, left=0.5cm,right=0.5cm,top=1cm,bottom=1cm,margin=0pt]{geometry}
pagestyle{empty}
usepackage{tikz}
usepackage{pgf}
pgfmathsetseed{numberpdfrandomseed} % Getting different random numbers. If you don't want, comment this.
begin{document}
centering
begin{tikzpicture}[remember picture,overlay]
foreach x in {0,1,...,paperwidth}{
pgfmathparse{int(rand*10)}letA=pgfmathresult
draw(current page.south west)++(x pt,0)--++(80:A);
}
end{tikzpicture}
end{document}
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
answered Feb 20 at 11:21
ferahfezaferahfeza
6,29611932
6,29611932
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like({rnd*cos(80)},{rnd*sin(80)})and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.
– marmot
Feb 20 at 18:23
add a comment |
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like({rnd*cos(80)},{rnd*sin(80)})and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.
– marmot
Feb 20 at 18:23
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like
({rnd*cos(80)},{rnd*sin(80)}) and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.– marmot
Feb 20 at 18:23
That does it but could you perhaps explain a bit why you are doing that? It seems that TikZ transforms the coordinate into something like
({rnd*cos(80)},{rnd*sin(80)}) and assigns the random number only afterwards. You evade this by first computing the random number and then constructing the path.– marmot
Feb 20 at 18:23
add a comment |
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