Local-scoped coordinate names in tikz?
8
I think I just discovered (!) that coordinates names are global in tikz:
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
...and I really expected
- an error in the second
tikzpicture(I am not usingremember picture!), and - a
(0,0)--(3,0)green line...
So,
am I correct that coordinate names are global to all
tikzpictures?As a bonus question, is it possible to create local coordinate names?
tikz-pgf
asked Nov 11 at 17:10
Rmano
7,75221647
add a comment |
8
I think I just discovered (!) that coordinates names are global in tikz:
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
...and I really expected
- an error in the second
tikzpicture(I am not usingremember picture!), and - a
(0,0)--(3,0)green line...
So,
am I correct that coordinate names are global to all
tikzpictures?As a bonus question, is it possible to create local coordinate names?
tikz-pgf
asked Nov 11 at 17:10
Rmano
7,75221647
1
+1 I didn't know that either. On page983we find this, and I quote:pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations
– AndréC
Nov 11 at 18:00
add a comment |
8
8
8
I think I just discovered (!) that coordinates names are global in tikz:
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
...and I really expected
- an error in the second
tikzpicture(I am not usingremember picture!), and - a
(0,0)--(3,0)green line...
So,
am I correct that coordinate names are global to all
tikzpictures?As a bonus question, is it possible to create local coordinate names?
tikz-pgf
asked Nov 11 at 17:10
Rmano
7,75221647
I think I just discovered (!) that coordinates names are global in tikz:
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
...and I really expected
- an error in the second
tikzpicture(I am not usingremember picture!), and - a
(0,0)--(3,0)green line...
So,
am I correct that coordinate names are global to all
tikzpictures?As a bonus question, is it possible to create local coordinate names?
tikz-pgf
tikz-pgf
asked Nov 11 at 17:10
Rmano
7,75221647
asked Nov 11 at 17:10
Rmano
7,75221647
edited Nov 11 at 17:20
asked Nov 11 at 17:10
Rmano
7,75221647
asked Nov 11 at 17:10
Rmano
7,75221647
asked Nov 11 at 17:10
Rmano
7,75221647
7,75221647
1
+1 I didn't know that either. On page983we find this, and I quote:pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations
– AndréC
Nov 11 at 18:00
add a comment |
1
+1 I didn't know that either. On page983we find this, and I quote:pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations
– AndréC
Nov 11 at 18:00
1
1
+1 I didn't know that either. On page
983 we find this, and I quote: pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations– AndréC
Nov 11 at 18:00
+1 I didn't know that either. On page
983 we find this, and I quote: pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations– AndréC
Nov 11 at 18:00
add a comment |
1 Answer
1
active
oldest
votes
5
Yes, I've observed that before. And I think your interpretation is correct, and you can make coordinates "local" by using name prefix.
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red,name prefix=Rmano]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
answered Nov 11 at 18:26
marmot
86.9k499185
Ah,name prefixis a nice trick. Thanks!
– Rmano
Nov 11 at 18:28
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
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active
oldest
votes
5
Yes, I've observed that before. And I think your interpretation is correct, and you can make coordinates "local" by using name prefix.
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red,name prefix=Rmano]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
answered Nov 11 at 18:26
marmot
86.9k499185
Ah,name prefixis a nice trick. Thanks!
– Rmano
Nov 11 at 18:28
add a comment |
5
Yes, I've observed that before. And I think your interpretation is correct, and you can make coordinates "local" by using name prefix.
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red,name prefix=Rmano]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
answered Nov 11 at 18:26
marmot
86.9k499185
Ah,name prefixis a nice trick. Thanks!
– Rmano
Nov 11 at 18:28
add a comment |
5
5
5
Yes, I've observed that before. And I think your interpretation is correct, and you can make coordinates "local" by using name prefix.
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red,name prefix=Rmano]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
answered Nov 11 at 18:26
marmot
86.9k499185
Yes, I've observed that before. And I think your interpretation is correct, and you can make coordinates "local" by using name prefix.
documentclass{article}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{tikz}
begin{document}
begin{tikzpicture}[black]
draw(0,0) coordinate(alfa) -- (3,0) coordinate(beta);
end{tikzpicture}
begin{tikzpicture}[blue]
draw (alfa) -- (beta);
end{tikzpicture}
begin{tikzpicture}[red,name prefix=Rmano]
begin{scope}
draw(1,0) coordinate(alfa) -- (2,0) coordinate(beta);
end{scope}
end{tikzpicture}
begin{tikzpicture}[green]
draw (alfa) -- (beta);
end{tikzpicture}
end{document}
answered Nov 11 at 18:26
marmot
86.9k499185
answered Nov 11 at 18:26
marmot
86.9k499185
answered Nov 11 at 18:26
marmot
86.9k499185
answered Nov 11 at 18:26
marmot
86.9k499185
86.9k499185
Ah,name prefixis a nice trick. Thanks!
– Rmano
Nov 11 at 18:28
add a comment |
Ah,name prefixis a nice trick. Thanks!
– Rmano
Nov 11 at 18:28
Ah,
name prefix is a nice trick. Thanks!– Rmano
Nov 11 at 18:28
Ah,
name prefix is a nice trick. Thanks!– Rmano
Nov 11 at 18:28
add a comment |
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1
+1 I didn't know that either. On page
983we find this, and I quote:pgfgetlastxy{macro for x}{macro for y} Since (x,y) coordinates are usually assigned globally, it is safe to use this command after path operations– AndréC
Nov 11 at 18:00