METAPOST equivalent to TikZ polar coordinates?
5
When drawing with TikZ, I find sometime convenient to use polar coordinates (angle:distance), as in this MWE
documentclassarticle
usepackagetikz
begindocument
begintikzpicture
[pole/.style=circle,draw=gray,fill=gray,thick,text width=2cm, align=center]
node[pole] (eur) at (60:3cm) Europe;
node[pole] (afr) at (300:3cm) Afrique;
node[pole] (amq) at (180:3cm) Amérique;
endtikzpicture
enddocument
How can I get a similar effect using METAPOST ? I could'nt find direct answer in the manual. I am quite sure one can achieve the same with a good knowledge of geometry. It would be good for scripting.
So far, my METAPOST equivalent would be
beginfig(1);
u:=1cm ;
label(btex Amérique etex, (-3u,0) ) ;
label(btex Europe etex, (u,2u) ) ;
label(btex Afrique etex, (u,-2u) ) ;
endfig ;
end
Of course this are not polar coordinates and I am even not sure angles are the same as in TikZ.
Since I am not a scientist, I would be glad to have some explanation if some geometry knowledge is required.
metapost
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
add a comment |
5
When drawing with TikZ, I find sometime convenient to use polar coordinates (angle:distance), as in this MWE
documentclassarticle
usepackagetikz
begindocument
begintikzpicture
[pole/.style=circle,draw=gray,fill=gray,thick,text width=2cm, align=center]
node[pole] (eur) at (60:3cm) Europe;
node[pole] (afr) at (300:3cm) Afrique;
node[pole] (amq) at (180:3cm) Amérique;
endtikzpicture
enddocument
How can I get a similar effect using METAPOST ? I could'nt find direct answer in the manual. I am quite sure one can achieve the same with a good knowledge of geometry. It would be good for scripting.
So far, my METAPOST equivalent would be
beginfig(1);
u:=1cm ;
label(btex Amérique etex, (-3u,0) ) ;
label(btex Europe etex, (u,2u) ) ;
label(btex Afrique etex, (u,-2u) ) ;
endfig ;
end
Of course this are not polar coordinates and I am even not sure angles are the same as in TikZ.
Since I am not a scientist, I would be glad to have some explanation if some geometry knowledge is required.
metapost
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21
add a comment |
5
5
5
1
When drawing with TikZ, I find sometime convenient to use polar coordinates (angle:distance), as in this MWE
documentclassarticle
usepackagetikz
begindocument
begintikzpicture
[pole/.style=circle,draw=gray,fill=gray,thick,text width=2cm, align=center]
node[pole] (eur) at (60:3cm) Europe;
node[pole] (afr) at (300:3cm) Afrique;
node[pole] (amq) at (180:3cm) Amérique;
endtikzpicture
enddocument
How can I get a similar effect using METAPOST ? I could'nt find direct answer in the manual. I am quite sure one can achieve the same with a good knowledge of geometry. It would be good for scripting.
So far, my METAPOST equivalent would be
beginfig(1);
u:=1cm ;
label(btex Amérique etex, (-3u,0) ) ;
label(btex Europe etex, (u,2u) ) ;
label(btex Afrique etex, (u,-2u) ) ;
endfig ;
end
Of course this are not polar coordinates and I am even not sure angles are the same as in TikZ.
Since I am not a scientist, I would be glad to have some explanation if some geometry knowledge is required.
metapost
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
When drawing with TikZ, I find sometime convenient to use polar coordinates (angle:distance), as in this MWE
documentclassarticle
usepackagetikz
begindocument
begintikzpicture
[pole/.style=circle,draw=gray,fill=gray,thick,text width=2cm, align=center]
node[pole] (eur) at (60:3cm) Europe;
node[pole] (afr) at (300:3cm) Afrique;
node[pole] (amq) at (180:3cm) Amérique;
endtikzpicture
enddocument
How can I get a similar effect using METAPOST ? I could'nt find direct answer in the manual. I am quite sure one can achieve the same with a good knowledge of geometry. It would be good for scripting.
So far, my METAPOST equivalent would be
beginfig(1);
u:=1cm ;
label(btex Amérique etex, (-3u,0) ) ;
label(btex Europe etex, (u,2u) ) ;
label(btex Afrique etex, (u,-2u) ) ;
endfig ;
end
Of course this are not polar coordinates and I am even not sure angles are the same as in TikZ.
Since I am not a scientist, I would be glad to have some explanation if some geometry knowledge is required.
metapost
metapost
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
asked Nov 15 '18 at 20:02
sztrukssztruks
1,6541817
1,6541817
You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21
add a comment |
You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21
You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21
You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21
add a comment |
1 Answer
1
active
oldest
votes
7
Use the dir operator. From the MetaPost manual:
Here with MetaFun in ConTeXt:
startMPpage
u:=1cm ;
label(btex Amérique etex, 3u*dir 60) ;
label(btex Europe etex, 3u*dir 300) ;
label(btex Afrique etex, 3u*dir 180) ;
stopMPpage
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operatoranglethat does the opposite, so thatangle dir 60should return60. A bit likeatan2in other languages.
– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write3 dir 60 scaled u.
– Thruston
Nov 15 '18 at 21:47
@Thrustonangledoes exactly performatan2(at least indoubleanddecimalmode) github.com/TeX-Live/texlive-source/blob/…
– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
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oldest
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7
Use the dir operator. From the MetaPost manual:
Here with MetaFun in ConTeXt:
startMPpage
u:=1cm ;
label(btex Amérique etex, 3u*dir 60) ;
label(btex Europe etex, 3u*dir 300) ;
label(btex Afrique etex, 3u*dir 180) ;
stopMPpage
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operatoranglethat does the opposite, so thatangle dir 60should return60. A bit likeatan2in other languages.
– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write3 dir 60 scaled u.
– Thruston
Nov 15 '18 at 21:47
@Thrustonangledoes exactly performatan2(at least indoubleanddecimalmode) github.com/TeX-Live/texlive-source/blob/…
– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
add a comment |
7
Use the dir operator. From the MetaPost manual:
Here with MetaFun in ConTeXt:
startMPpage
u:=1cm ;
label(btex Amérique etex, 3u*dir 60) ;
label(btex Europe etex, 3u*dir 300) ;
label(btex Afrique etex, 3u*dir 180) ;
stopMPpage
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operatoranglethat does the opposite, so thatangle dir 60should return60. A bit likeatan2in other languages.
– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write3 dir 60 scaled u.
– Thruston
Nov 15 '18 at 21:47
@Thrustonangledoes exactly performatan2(at least indoubleanddecimalmode) github.com/TeX-Live/texlive-source/blob/…
– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
add a comment |
7
7
7
Use the dir operator. From the MetaPost manual:
Here with MetaFun in ConTeXt:
startMPpage
u:=1cm ;
label(btex Amérique etex, 3u*dir 60) ;
label(btex Europe etex, 3u*dir 300) ;
label(btex Afrique etex, 3u*dir 180) ;
stopMPpage
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
Use the dir operator. From the MetaPost manual:
Here with MetaFun in ConTeXt:
startMPpage
u:=1cm ;
label(btex Amérique etex, 3u*dir 60) ;
label(btex Europe etex, 3u*dir 300) ;
label(btex Afrique etex, 3u*dir 180) ;
stopMPpage
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
answered Nov 15 '18 at 20:16
Henri MenkeHenri Menke
76.9k8168283
76.9k8168283
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operatoranglethat does the opposite, so thatangle dir 60should return60. A bit likeatan2in other languages.
– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write3 dir 60 scaled u.
– Thruston
Nov 15 '18 at 21:47
@Thrustonangledoes exactly performatan2(at least indoubleanddecimalmode) github.com/TeX-Live/texlive-source/blob/…
– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
add a comment |
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operatoranglethat does the opposite, so thatangle dir 60should return60. A bit likeatan2in other languages.
– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write3 dir 60 scaled u.
– Thruston
Nov 15 '18 at 21:47
@Thrustonangledoes exactly performatan2(at least indoubleanddecimalmode) github.com/TeX-Live/texlive-source/blob/…
– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
Thanks. I wouldn't have been able to find this on my own. It's been too long since I learnt what does cos and sin reflect… But now I see the point.
– sztruks
Nov 15 '18 at 21:24
There is also an operator
angle that does the opposite, so that angle dir 60 should return 60. A bit like atan2 in other languages.– Thruston
Nov 15 '18 at 21:42
There is also an operator
angle that does the opposite, so that angle dir 60 should return 60. A bit like atan2 in other languages.– Thruston
Nov 15 '18 at 21:42
As a matter of style you could also write
3 dir 60 scaled u.– Thruston
Nov 15 '18 at 21:47
As a matter of style you could also write
3 dir 60 scaled u.– Thruston
Nov 15 '18 at 21:47
@Thruston
angle does exactly perform atan2 (at least in double and decimal mode) github.com/TeX-Live/texlive-source/blob/…– Henri Menke
Nov 15 '18 at 21:50
@Thruston
angle does exactly perform atan2 (at least in double and decimal mode) github.com/TeX-Live/texlive-source/blob/…– Henri Menke
Nov 15 '18 at 21:50
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
Yes quite right. In my old-fashioned British way, when I say “a bit like” I mean “exactly the same as”…
– Thruston
Nov 15 '18 at 21:55
add a comment |
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You can easily convert r and φ to cartesian coordinates using the prescription (x,y) = (r*cos(φ),r*sin(φ))
– Henri Menke
Nov 15 '18 at 20:21