You can't use `the character 0' after the

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I tried to draw the following picture usin Tikz, but got the error message in the title of this issue.

enter image description here

This is the code I am using. Observe that the error message comes when I try to insert the node $v_0$ . Can anyone tell me whats going wrong here?

begintikzpicture
deffin3 %... end of the slope
defbot-2 %... height of the slope
defmp2 %... x-coordinate of final moto's position
%... environment
draw[gray!50,fill=gray!50,very thick]
 (-2,0)--
 (0,0)--
 (fin,bot)--
 (fin+1,bot)--
 (fin+1,bot-0.2)--
 (-2,bot-0.2)--cycle
 ;

%-> DEFINE THE MOTO PICTURE (#1=size, #2=location, #3=rotation)
defmoto#1#2#3
 defwd#1 %... wheel axis distance and moto height
 defwr#1/4 %... wheel radius
 defpos#2++(0,wr) %... position of the very bottom point of the wheel

 %... wheels
 draw[gray!50,very thick]
 pos circle(wr)
 pos+(#3:wd) circle(wr)
 ;
 %... chassis
 draw[gray!50,fill=gray!50]
 pos+(#3+120:6*wr/5) arc(120+#3:#3:6*wr/5)--++
 (#3:wd-12*wr/5) arc(#3+180:#3+60:6*wr/5)--++
 (#3+90:wr/5) arc(#3+60:#3+90:9*wr/5)--++
 (#3+120:wr)--++
 (#3+210:2*wr)--++
 (#3+180:3*wr)
 ;
 %... motorcyclist
 draw[gray!50,line width=4*wd]
 pos+(#3+60:6*wr/5)--++
 (#3+60:3*wr)
 pos++(#3+60:4*wr) circle(2*wr/3)
 pos++(#3+60:3*wr)--++
 (#3-10:2*wr)
 ;
 %... velocity vector
 %draw[->,gray!50,very thick]
 % pos++(#3:wd)++(#3+90:wr)--++
 % (#3:wd)% node[above]$v_0$
 % ;

%... the sizes
draw[<->,thick,white]
 (0,0)--
 (0,mp*bot/fin) node[midway,fill=gray!50]$h$
 ;
draw[<->,thick,white]
 (0,mp*bot/fin-0.1)--
 (mp,mp*bot/fin-0.1) node[midway,fill=gray!50]$x$
 ;
draw[gray!50,dashed,thick]
 (-0.5,0.25)--
 (0,0.25) to[out=0,in=100]
 (mp+0.25,(mp+0.25)*bot/fin)
 ;

moto0.5(-1.5,0)0
 draw[->,gray!50,very thick]
 (-1,0.3)--
 (-0.5,0.3)% node[above]$v_0$
 ;
 draw[gray!50]
 (-0.5,0.3) node[above]$v_0$
 ;
moto0.5(mp,mp*bot/fin)atan(bot/fin)
endtikzpicture

asked 2 hours ago

Brasil

849

3

Don't redefine wd. wd is a TeX (very used) primitive. Call it wad or some other name.
â€“Â Phelype Oleinik
2 hours ago

Thank you very much, @PhelypeOleinik! Can you please post as an aswer so I can mark it?
â€“Â Brasil
2 hours ago

add a commentÂ |Â

up vote
3
down vote

favorite

I tried to draw the following picture usin Tikz, but got the error message in the title of this issue.

enter image description here

This is the code I am using. Observe that the error message comes when I try to insert the node $v_0$ . Can anyone tell me whats going wrong here?

begintikzpicture
deffin3 %... end of the slope
defbot-2 %... height of the slope
defmp2 %... x-coordinate of final moto's position
%... environment
draw[gray!50,fill=gray!50,very thick]
 (-2,0)--
 (0,0)--
 (fin,bot)--
 (fin+1,bot)--
 (fin+1,bot-0.2)--
 (-2,bot-0.2)--cycle
 ;

%-> DEFINE THE MOTO PICTURE (#1=size, #2=location, #3=rotation)
defmoto#1#2#3
 defwd#1 %... wheel axis distance and moto height
 defwr#1/4 %... wheel radius
 defpos#2++(0,wr) %... position of the very bottom point of the wheel

 %... wheels
 draw[gray!50,very thick]
 pos circle(wr)
 pos+(#3:wd) circle(wr)
 ;
 %... chassis
 draw[gray!50,fill=gray!50]
 pos+(#3+120:6*wr/5) arc(120+#3:#3:6*wr/5)--++
 (#3:wd-12*wr/5) arc(#3+180:#3+60:6*wr/5)--++
 (#3+90:wr/5) arc(#3+60:#3+90:9*wr/5)--++
 (#3+120:wr)--++
 (#3+210:2*wr)--++
 (#3+180:3*wr)
 ;
 %... motorcyclist
 draw[gray!50,line width=4*wd]
 pos+(#3+60:6*wr/5)--++
 (#3+60:3*wr)
 pos++(#3+60:4*wr) circle(2*wr/3)
 pos++(#3+60:3*wr)--++
 (#3-10:2*wr)
 ;
 %... velocity vector
 %draw[->,gray!50,very thick]
 % pos++(#3:wd)++(#3+90:wr)--++
 % (#3:wd)% node[above]$v_0$
 % ;

%... the sizes
draw[<->,thick,white]
 (0,0)--
 (0,mp*bot/fin) node[midway,fill=gray!50]$h$
 ;
draw[<->,thick,white]
 (0,mp*bot/fin-0.1)--
 (mp,mp*bot/fin-0.1) node[midway,fill=gray!50]$x$
 ;
draw[gray!50,dashed,thick]
 (-0.5,0.25)--
 (0,0.25) to[out=0,in=100]
 (mp+0.25,(mp+0.25)*bot/fin)
 ;

moto0.5(-1.5,0)0
 draw[->,gray!50,very thick]
 (-1,0.3)--
 (-0.5,0.3)% node[above]$v_0$
 ;
 draw[gray!50]
 (-0.5,0.3) node[above]$v_0$
 ;
moto0.5(mp,mp*bot/fin)atan(bot/fin)
endtikzpicture

asked 2 hours ago

Brasil

849

3

Don't redefine wd. wd is a TeX (very used) primitive. Call it wad or some other name.
â€“Â Phelype Oleinik
2 hours ago

Thank you very much, @PhelypeOleinik! Can you please post as an aswer so I can mark it?
â€“Â Brasil
2 hours ago

add a commentÂ |Â

up vote
3
down vote

favorite

I tried to draw the following picture usin Tikz, but got the error message in the title of this issue.

enter image description here

This is the code I am using. Observe that the error message comes when I try to insert the node $v_0$ . Can anyone tell me whats going wrong here?

begintikzpicture
deffin3 %... end of the slope
defbot-2 %... height of the slope
defmp2 %... x-coordinate of final moto's position
%... environment
draw[gray!50,fill=gray!50,very thick]
 (-2,0)--
 (0,0)--
 (fin,bot)--
 (fin+1,bot)--
 (fin+1,bot-0.2)--
 (-2,bot-0.2)--cycle
 ;

%-> DEFINE THE MOTO PICTURE (#1=size, #2=location, #3=rotation)
defmoto#1#2#3
 defwd#1 %... wheel axis distance and moto height
 defwr#1/4 %... wheel radius
 defpos#2++(0,wr) %... position of the very bottom point of the wheel

 %... wheels
 draw[gray!50,very thick]
 pos circle(wr)
 pos+(#3:wd) circle(wr)
 ;
 %... chassis
 draw[gray!50,fill=gray!50]
 pos+(#3+120:6*wr/5) arc(120+#3:#3:6*wr/5)--++
 (#3:wd-12*wr/5) arc(#3+180:#3+60:6*wr/5)--++
 (#3+90:wr/5) arc(#3+60:#3+90:9*wr/5)--++
 (#3+120:wr)--++
 (#3+210:2*wr)--++
 (#3+180:3*wr)
 ;
 %... motorcyclist
 draw[gray!50,line width=4*wd]
 pos+(#3+60:6*wr/5)--++
 (#3+60:3*wr)
 pos++(#3+60:4*wr) circle(2*wr/3)
 pos++(#3+60:3*wr)--++
 (#3-10:2*wr)
 ;
 %... velocity vector
 %draw[->,gray!50,very thick]
 % pos++(#3:wd)++(#3+90:wr)--++
 % (#3:wd)% node[above]$v_0$
 % ;

%... the sizes
draw[<->,thick,white]
 (0,0)--
 (0,mp*bot/fin) node[midway,fill=gray!50]$h$
 ;
draw[<->,thick,white]
 (0,mp*bot/fin-0.1)--
 (mp,mp*bot/fin-0.1) node[midway,fill=gray!50]$x$
 ;
draw[gray!50,dashed,thick]
 (-0.5,0.25)--
 (0,0.25) to[out=0,in=100]
 (mp+0.25,(mp+0.25)*bot/fin)
 ;

moto0.5(-1.5,0)0
 draw[->,gray!50,very thick]
 (-1,0.3)--
 (-0.5,0.3)% node[above]$v_0$
 ;
 draw[gray!50]
 (-0.5,0.3) node[above]$v_0$
 ;
moto0.5(mp,mp*bot/fin)atan(bot/fin)
endtikzpicture

asked 2 hours ago

Brasil

849

I tried to draw the following picture usin Tikz, but got the error message in the title of this issue.

enter image description here

This is the code I am using. Observe that the error message comes when I try to insert the node $v_0$ . Can anyone tell me whats going wrong here?

begintikzpicture
deffin3 %... end of the slope
defbot-2 %... height of the slope
defmp2 %... x-coordinate of final moto's position
%... environment
draw[gray!50,fill=gray!50,very thick]
 (-2,0)--
 (0,0)--
 (fin,bot)--
 (fin+1,bot)--
 (fin+1,bot-0.2)--
 (-2,bot-0.2)--cycle
 ;

%-> DEFINE THE MOTO PICTURE (#1=size, #2=location, #3=rotation)
defmoto#1#2#3
 defwd#1 %... wheel axis distance and moto height
 defwr#1/4 %... wheel radius
 defpos#2++(0,wr) %... position of the very bottom point of the wheel

 %... wheels
 draw[gray!50,very thick]
 pos circle(wr)
 pos+(#3:wd) circle(wr)
 ;
 %... chassis
 draw[gray!50,fill=gray!50]
 pos+(#3+120:6*wr/5) arc(120+#3:#3:6*wr/5)--++
 (#3:wd-12*wr/5) arc(#3+180:#3+60:6*wr/5)--++
 (#3+90:wr/5) arc(#3+60:#3+90:9*wr/5)--++
 (#3+120:wr)--++
 (#3+210:2*wr)--++
 (#3+180:3*wr)
 ;
 %... motorcyclist
 draw[gray!50,line width=4*wd]
 pos+(#3+60:6*wr/5)--++
 (#3+60:3*wr)
 pos++(#3+60:4*wr) circle(2*wr/3)
 pos++(#3+60:3*wr)--++
 (#3-10:2*wr)
 ;
 %... velocity vector
 %draw[->,gray!50,very thick]
 % pos++(#3:wd)++(#3+90:wr)--++
 % (#3:wd)% node[above]$v_0$
 % ;

%... the sizes
draw[<->,thick,white]
 (0,0)--
 (0,mp*bot/fin) node[midway,fill=gray!50]$h$
 ;
draw[<->,thick,white]
 (0,mp*bot/fin-0.1)--
 (mp,mp*bot/fin-0.1) node[midway,fill=gray!50]$x$
 ;
draw[gray!50,dashed,thick]
 (-0.5,0.25)--
 (0,0.25) to[out=0,in=100]
 (mp+0.25,(mp+0.25)*bot/fin)
 ;

moto0.5(-1.5,0)0
 draw[->,gray!50,very thick]
 (-1,0.3)--
 (-0.5,0.3)% node[above]$v_0$
 ;
 draw[gray!50]
 (-0.5,0.3) node[above]$v_0$
 ;
moto0.5(mp,mp*bot/fin)atan(bot/fin)
endtikzpicture

tikz-pgf

asked 2 hours ago

Brasil

849

asked 2 hours ago

Brasil

849

asked 2 hours ago

Brasil

849

asked 2 hours ago

Brasil

849

asked 2 hours ago

Brasil

849

3

Don't redefine wd. wd is a TeX (very used) primitive. Call it wad or some other name.
â€“Â Phelype Oleinik
2 hours ago

Thank you very much, @PhelypeOleinik! Can you please post as an aswer so I can mark it?
â€“Â Brasil
2 hours ago

add a commentÂ |Â

3

Don't redefine wd. wd is a TeX (very used) primitive. Call it wad or some other name.
â€“Â Phelype Oleinik
2 hours ago

Thank you very much, @PhelypeOleinik! Can you please post as an aswer so I can mark it?
â€“Â Brasil
2 hours ago

Don't redefine wd. wd is a TeX (very used) primitive. Call it wad or some other name.
â€“Â Phelype Oleinik
2 hours ago

Thank you very much, @PhelypeOleinik! Can you please post as an aswer so I can mark it?
â€“Â Brasil
2 hours ago

add a commentÂ |Â

1 Answer
1

active

oldest

votes

up vote
6
down vote

accepted

The problem is that you redefined TeX's wd primitive, which gets the width of a box. Try the example below with the defwd0.5 (which is what your code does when you call moto0.5) uncommented:

documentclassarticle

begindocument

newboxtempbox
setboxtempboxhboxDon't emphever redefine TeX's internals.

% defwd0.5
The width of the following warning is: thewdtempbox

boxtempbox

enddocument

Once you change wd by something that is not used by TeX then it will work.

This is one of the main reasons that LaTeX's newcommand and its successors are recommended for end users and raise an error if a command is already defined: error messages get a whole lot more interesting if you redefine something you shouldn't.

answered 2 hours ago

Phelype Oleinik

18.7k54173

2

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

add a commentÂ |Â

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1 Answer
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1 Answer
1

active

oldest

votes

up vote
6
down vote

accepted

The problem is that you redefined TeX's wd primitive, which gets the width of a box. Try the example below with the defwd0.5 (which is what your code does when you call moto0.5) uncommented:

documentclassarticle

begindocument

newboxtempbox
setboxtempboxhboxDon't emphever redefine TeX's internals.

% defwd0.5
The width of the following warning is: thewdtempbox

boxtempbox

enddocument

Once you change wd by something that is not used by TeX then it will work.

answered 2 hours ago

Phelype Oleinik

18.7k54173

2

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

add a commentÂ |Â

up vote
6
down vote

accepted

The problem is that you redefined TeX's wd primitive, which gets the width of a box. Try the example below with the defwd0.5 (which is what your code does when you call moto0.5) uncommented:

documentclassarticle

begindocument

newboxtempbox
setboxtempboxhboxDon't emphever redefine TeX's internals.

% defwd0.5
The width of the following warning is: thewdtempbox

boxtempbox

enddocument

Once you change wd by something that is not used by TeX then it will work.

answered 2 hours ago

Phelype Oleinik

18.7k54173

2

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

add a commentÂ |Â

up vote
6
down vote

accepted

The problem is that you redefined TeX's wd primitive, which gets the width of a box. Try the example below with the defwd0.5 (which is what your code does when you call moto0.5) uncommented:

documentclassarticle

begindocument

newboxtempbox
setboxtempboxhboxDon't emphever redefine TeX's internals.

% defwd0.5
The width of the following warning is: thewdtempbox

boxtempbox

enddocument

Once you change wd by something that is not used by TeX then it will work.

answered 2 hours ago

Phelype Oleinik

18.7k54173

The problem is that you redefined TeX's wd primitive, which gets the width of a box. Try the example below with the defwd0.5 (which is what your code does when you call moto0.5) uncommented:

documentclassarticle

begindocument

newboxtempbox
setboxtempboxhboxDon't emphever redefine TeX's internals.

% defwd0.5
The width of the following warning is: thewdtempbox

boxtempbox

enddocument

Once you change wd by something that is not used by TeX then it will work.

answered 2 hours ago

Phelype Oleinik

18.7k54173

answered 2 hours ago

Phelype Oleinik

18.7k54173

answered 2 hours ago

Phelype Oleinik

18.7k54173

answered 2 hours ago

Phelype Oleinik

18.7k54173

2

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

add a commentÂ |Â

2

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

A long term target for LaTeX3 is to express all internal functions in terms of aliases of the primitives, so redefining a primitive will not be a problem. Of course, all packages should follow suit, which is the big issue.
â€“Â egreg
2 hours ago

add a commentÂ |Â

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