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how one can write a nice vector parser, something that does pgfvecparseA=B-C; D=E x F;
Translate in-line equations to TeX code (Any Package?)how to draw pitch, yaw and roll with 3d plotPass a 3d coordinate via pgfkeystkz-euclide, define points outside of tikzpictureHow to draw star in TikZ backgroundTikz: draw a vector pointing from one point to anotherHow to draw an elliptical arc in TikZ given only opposite extreme points (vertices) of the ellipse?How can one plot in 3D a matrix with LaTeX?Line up nested tikz enviroments or how to get rid of themHow to draw a square and its diagonals with arrows?beginfigure… endfigure is not working with tikz packagetikz pic: no pgfpointanchor possible inside the pic definitionHow to add a label to a vector and an angle?
4
I am often use coordinates of points to draw figure in geometry. I know that, we can add, minus coordinates of points, example
begintikzpicture
tkzDefPoints0/0/C',3/0/D',1/1/B'
coordinate (A') at ($(B')+(D')-(C')$);
endtikzpicture
If I have two points A(1,2,3) and B(4,5,6), how can I define vector AB as (B)-(A)?
tikz-pgf tikzmark
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
add a comment |
4
I am often use coordinates of points to draw figure in geometry. I know that, we can add, minus coordinates of points, example
begintikzpicture
tkzDefPoints0/0/C',3/0/D',1/1/B'
coordinate (A') at ($(B')+(D')-(C')$);
endtikzpicture
If I have two points A(1,2,3) and B(4,5,6), how can I define vector AB as (B)-(A)?
tikz-pgf tikzmark
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Asymptote is a good choice
– Black Mild
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code(1,2,3)is just fancy interface for a 2d point (that is a projection of this 3d point).
– Kpym
yesterday
add a comment |
4
4
4
I am often use coordinates of points to draw figure in geometry. I know that, we can add, minus coordinates of points, example
begintikzpicture
tkzDefPoints0/0/C',3/0/D',1/1/B'
coordinate (A') at ($(B')+(D')-(C')$);
endtikzpicture
If I have two points A(1,2,3) and B(4,5,6), how can I define vector AB as (B)-(A)?
tikz-pgf tikzmark
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
I am often use coordinates of points to draw figure in geometry. I know that, we can add, minus coordinates of points, example
begintikzpicture
tkzDefPoints0/0/C',3/0/D',1/1/B'
coordinate (A') at ($(B')+(D')-(C')$);
endtikzpicture
If I have two points A(1,2,3) and B(4,5,6), how can I define vector AB as (B)-(A)?
tikz-pgf tikzmark
tikz-pgf tikzmark
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
edited 2 days ago
minhthien_2016
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
asked 2 days ago
minhthien_2016minhthien_2016
1,4221917
1,4221917
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Asymptote is a good choice
– Black Mild
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code(1,2,3)is just fancy interface for a 2d point (that is a projection of this 3d point).
– Kpym
yesterday
add a comment |
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Asymptote is a good choice
– Black Mild
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code(1,2,3)is just fancy interface for a 2d point (that is a projection of this 3d point).
– Kpym
yesterday
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Asymptote is a good choice
– Black Mild
yesterday
Asymptote is a good choice
– Black Mild
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code
(1,2,3) is just fancy interface for a 2d point (that is a projection of this 3d point).– Kpym
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code
(1,2,3) is just fancy interface for a 2d point (that is a projection of this 3d point).– Kpym
yesterday
add a comment |
2 Answers
2
active
oldest
votes
6
If you use the coordinates only for drawing, simply define each components of points as variable and then define coordinate points using them. For example:
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
defAx2
defAy4
defAz3
defBx-1
defBy3
defBz4
coordinate (O) at (0,0,0);
coordinate (A) at (Ax,Ay,Az);
coordinate (B) at (Bx,By,Bz);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(Ax,Ay,Az)$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(Bx,By,Bz)$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
SUPPLEMENT
With the permission of the answerer, I (Steven B Segletes) show here how the listofitems package can be used to streamline the syntax and maybe provide more readability. With it, I can create the arrays by reading a list, with the syntax readlistA2,4,3. Then, the expression A[] will spit back the array 2,4,3, which is sufficient for use in the present MWE. However, the individual components are also accessible as A[1], A[2], and A[3], which can be used for various calculations, as required.
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot,listofitems
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
readlistA2,4,3
readlistB-1,3,4
coordinate (O) at (0,0,0);
coordinate (A) at (A[]);
coordinate (B) at (B[]);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(A[])$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(B[])$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
edited yesterday
Steven B. Segletes
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
@ferahfezamargin = 3.14159mmwicked!
– L. F.
yesterday
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
|
show 7 more comments
4
Just for fun, I wrote routines for 3D vector addition, subtraction, cross product and dot product (scalar treated as a 1D vector). I was trying to actually parse expressions of the form A+B but eventually gave up.
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
vecsubCAB
C[]
vecdotCAB
C[]
veccrossCAB
C[]
enddocument
SUPPLEMENT
I hope John doesn't mind me (Steven B Segletes) adding his sought-after parser to the code. This allows input of the form vecparseCA+B, vecparseCA - B, vecparseCA .B, and vecparseCA xB (extra spaces of no consequence).
Support added not only for vecparseCA xB, but also vecparseCA x(3,5,6), vecparseC(3,5,6)xB and vecparseC(1,1,1)x(1,2,3).
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
setsepchar,%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecparse#1#2%
setsepcharx%
readlist*@findop#2%
ifnumlistlen@findop[1]=1relax
itemtomacro@findop[1]tmpA
else
itemtomacro@findop[1,2]tmpF
setsepchar,%
readlisttmpEtmpF%
deftmpAtmpE%
fi
ifnumlistlen@findop[2]=1relax
itemtomacro@findop[2]tmpB
else
itemtomacro@findop[2,2]tmpD
setsepchar,%
readlisttmpCtmpD%
deftmpBtmpC%
fi
if+@findopsep[1]relax
deftmpvecadd#1%
elseif-@findopsep[1]relax
deftmpvecsub#1%
elseif.@findopsep[1]relax
deftmpvecdot#1%
elseif x@findopsep[1]relax
deftmpveccross#1%
fifififi
expandafterexpandafterexpandaftertmpexpandaftertmpAtmpB
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
VP:vecparseCA+B
C[]
vecsubCAB
C[]
VP:vecparseCA - B
C[]
vecdotCAB
C[]
VP:vecparseCA .B
C[]
veccrossCAB
C[]
VP:vecparseCA xB
C[]
VP:vecparseCA x(3,5,6)
C[]
VP:vecparseC(3,5,6)xB
C[]
VP:vecparseC(1,1,1)x(1,2,3)
C[]
enddocument
edited 9 hours ago
Steven B. Segletes
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
I was thinking more of expressions likeA+(4,5,6)which are a lot easier when A expands to1,2,3directly.
– John Kormylo
11 hours ago
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
|
show 6 more comments
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
6
If you use the coordinates only for drawing, simply define each components of points as variable and then define coordinate points using them. For example:
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
defAx2
defAy4
defAz3
defBx-1
defBy3
defBz4
coordinate (O) at (0,0,0);
coordinate (A) at (Ax,Ay,Az);
coordinate (B) at (Bx,By,Bz);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(Ax,Ay,Az)$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(Bx,By,Bz)$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
SUPPLEMENT
With the permission of the answerer, I (Steven B Segletes) show here how the listofitems package can be used to streamline the syntax and maybe provide more readability. With it, I can create the arrays by reading a list, with the syntax readlistA2,4,3. Then, the expression A[] will spit back the array 2,4,3, which is sufficient for use in the present MWE. However, the individual components are also accessible as A[1], A[2], and A[3], which can be used for various calculations, as required.
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot,listofitems
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
readlistA2,4,3
readlistB-1,3,4
coordinate (O) at (0,0,0);
coordinate (A) at (A[]);
coordinate (B) at (B[]);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(A[])$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(B[])$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
edited yesterday
Steven B. Segletes
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
@ferahfezamargin = 3.14159mmwicked!
– L. F.
yesterday
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
|
show 7 more comments
6
If you use the coordinates only for drawing, simply define each components of points as variable and then define coordinate points using them. For example:
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
defAx2
defAy4
defAz3
defBx-1
defBy3
defBz4
coordinate (O) at (0,0,0);
coordinate (A) at (Ax,Ay,Az);
coordinate (B) at (Bx,By,Bz);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(Ax,Ay,Az)$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(Bx,By,Bz)$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
SUPPLEMENT
With the permission of the answerer, I (Steven B Segletes) show here how the listofitems package can be used to streamline the syntax and maybe provide more readability. With it, I can create the arrays by reading a list, with the syntax readlistA2,4,3. Then, the expression A[] will spit back the array 2,4,3, which is sufficient for use in the present MWE. However, the individual components are also accessible as A[1], A[2], and A[3], which can be used for various calculations, as required.
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot,listofitems
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
readlistA2,4,3
readlistB-1,3,4
coordinate (O) at (0,0,0);
coordinate (A) at (A[]);
coordinate (B) at (B[]);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(A[])$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(B[])$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
edited yesterday
Steven B. Segletes
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
@ferahfezamargin = 3.14159mmwicked!
– L. F.
yesterday
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
|
show 7 more comments
6
6
6
If you use the coordinates only for drawing, simply define each components of points as variable and then define coordinate points using them. For example:
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
defAx2
defAy4
defAz3
defBx-1
defBy3
defBz4
coordinate (O) at (0,0,0);
coordinate (A) at (Ax,Ay,Az);
coordinate (B) at (Bx,By,Bz);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(Ax,Ay,Az)$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(Bx,By,Bz)$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
SUPPLEMENT
With the permission of the answerer, I (Steven B Segletes) show here how the listofitems package can be used to streamline the syntax and maybe provide more readability. With it, I can create the arrays by reading a list, with the syntax readlistA2,4,3. Then, the expression A[] will spit back the array 2,4,3, which is sufficient for use in the present MWE. However, the individual components are also accessible as A[1], A[2], and A[3], which can be used for various calculations, as required.
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot,listofitems
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
readlistA2,4,3
readlistB-1,3,4
coordinate (O) at (0,0,0);
coordinate (A) at (A[]);
coordinate (B) at (B[]);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(A[])$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(B[])$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
edited yesterday
Steven B. Segletes
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
If you use the coordinates only for drawing, simply define each components of points as variable and then define coordinate points using them. For example:
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
defAx2
defAy4
defAz3
defBx-1
defBy3
defBz4
coordinate (O) at (0,0,0);
coordinate (A) at (Ax,Ay,Az);
coordinate (B) at (Bx,By,Bz);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(Ax,Ay,Az)$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(Bx,By,Bz)$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
SUPPLEMENT
With the permission of the answerer, I (Steven B Segletes) show here how the listofitems package can be used to streamline the syntax and maybe provide more readability. With it, I can create the arrays by reading a list, with the syntax readlistA2,4,3. Then, the expression A[] will spit back the array 2,4,3, which is sufficient for use in the present MWE. However, the individual components are also accessible as A[1], A[2], and A[3], which can be used for various calculations, as required.
documentclass[margin=3.14159mm]standalone
usepackagetikz,tikz-3dplot,listofitems
begindocument
tdplotsetmaincoords60125
begintikzpicture
[scale=0.9,
tdplot_main_coords,
axis/.style=-latex,thick,
vector/.style=-stealth,red,very thick,
vector guide/.style=dashed,thick]
%standard tikz coordinate definition using x, y, z coords
% A(2,4,3), B(3,-1,4)
readlistA2,4,3
readlistB-1,3,4
coordinate (O) at (0,0,0);
coordinate (A) at (A[]);
coordinate (B) at (B[]);
%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) -- (0,0,5) node[anchor=south]$z$;
%Dot at point
fill [blue] (A) circle (2pt);
fill [blue] (B) circle (2pt);
%draw a vector from O to A and O to B
draw[vector guide] (O)node[left=1mm] -- (A)node[above=-1mm,right]$P_1(A[])$;
draw[vector guide] (O) -- (B)node[above=-1mm,right]$P_2(B[])$;
%draw vector D=AB
draw[vector] (A) -- (B)node[midway,above,sloped]$mathbfD$;
endtikzpicture
enddocument
edited yesterday
Steven B. Segletes
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
edited yesterday
Steven B. Segletes
160k9205413
edited yesterday
Steven B. Segletes
160k9205413
edited yesterday
Steven B. Segletes
160k9205413
160k9205413
answered yesterday
ferahfezaferahfeza
7,33411933
answered yesterday
ferahfezaferahfeza
7,33411933
answered yesterday
ferahfezaferahfeza
7,33411933
7,33411933
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
@ferahfezamargin = 3.14159mmwicked!
– L. F.
yesterday
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
|
show 7 more comments
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
@ferahfezamargin = 3.14159mmwicked!
– L. F.
yesterday
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
Would you mind if I added a supplement to your answer?
– Steven B. Segletes
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
@StevenB.Segletes, sure. I'd appreciate it.
– ferahfeza
yesterday
1
1
@ferahfeza
margin = 3.14159mm wicked!– L. F.
yesterday
@ferahfeza
margin = 3.14159mm wicked!– L. F.
yesterday
1
1
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
Since language gap can easily occur on an international site as this, I would note for your benefit that "wicked" is a euphemism common to the Northeastern region of the United States, to mean "especially good." Thus, @L.F. was paying you a compliment, not the opposite.
– Steven B. Segletes
yesterday
1
1
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
Oh don't worry or fret. I recall being similarly confused the first time I visited Maine, U.S. ...and I live less than 500 miles away from there and speak nominally the same language..
– Steven B. Segletes
yesterday
|
show 7 more comments
4
Just for fun, I wrote routines for 3D vector addition, subtraction, cross product and dot product (scalar treated as a 1D vector). I was trying to actually parse expressions of the form A+B but eventually gave up.
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
vecsubCAB
C[]
vecdotCAB
C[]
veccrossCAB
C[]
enddocument
SUPPLEMENT
I hope John doesn't mind me (Steven B Segletes) adding his sought-after parser to the code. This allows input of the form vecparseCA+B, vecparseCA - B, vecparseCA .B, and vecparseCA xB (extra spaces of no consequence).
Support added not only for vecparseCA xB, but also vecparseCA x(3,5,6), vecparseC(3,5,6)xB and vecparseC(1,1,1)x(1,2,3).
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
setsepchar,%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecparse#1#2%
setsepcharx%
readlist*@findop#2%
ifnumlistlen@findop[1]=1relax
itemtomacro@findop[1]tmpA
else
itemtomacro@findop[1,2]tmpF
setsepchar,%
readlisttmpEtmpF%
deftmpAtmpE%
fi
ifnumlistlen@findop[2]=1relax
itemtomacro@findop[2]tmpB
else
itemtomacro@findop[2,2]tmpD
setsepchar,%
readlisttmpCtmpD%
deftmpBtmpC%
fi
if+@findopsep[1]relax
deftmpvecadd#1%
elseif-@findopsep[1]relax
deftmpvecsub#1%
elseif.@findopsep[1]relax
deftmpvecdot#1%
elseif x@findopsep[1]relax
deftmpveccross#1%
fifififi
expandafterexpandafterexpandaftertmpexpandaftertmpAtmpB
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
VP:vecparseCA+B
C[]
vecsubCAB
C[]
VP:vecparseCA - B
C[]
vecdotCAB
C[]
VP:vecparseCA .B
C[]
veccrossCAB
C[]
VP:vecparseCA xB
C[]
VP:vecparseCA x(3,5,6)
C[]
VP:vecparseC(3,5,6)xB
C[]
VP:vecparseC(1,1,1)x(1,2,3)
C[]
enddocument
edited 9 hours ago
Steven B. Segletes
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
I was thinking more of expressions likeA+(4,5,6)which are a lot easier when A expands to1,2,3directly.
– John Kormylo
11 hours ago
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
|
show 6 more comments
4
Just for fun, I wrote routines for 3D vector addition, subtraction, cross product and dot product (scalar treated as a 1D vector). I was trying to actually parse expressions of the form A+B but eventually gave up.
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
vecsubCAB
C[]
vecdotCAB
C[]
veccrossCAB
C[]
enddocument
SUPPLEMENT
I hope John doesn't mind me (Steven B Segletes) adding his sought-after parser to the code. This allows input of the form vecparseCA+B, vecparseCA - B, vecparseCA .B, and vecparseCA xB (extra spaces of no consequence).
Support added not only for vecparseCA xB, but also vecparseCA x(3,5,6), vecparseC(3,5,6)xB and vecparseC(1,1,1)x(1,2,3).
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
setsepchar,%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecparse#1#2%
setsepcharx%
readlist*@findop#2%
ifnumlistlen@findop[1]=1relax
itemtomacro@findop[1]tmpA
else
itemtomacro@findop[1,2]tmpF
setsepchar,%
readlisttmpEtmpF%
deftmpAtmpE%
fi
ifnumlistlen@findop[2]=1relax
itemtomacro@findop[2]tmpB
else
itemtomacro@findop[2,2]tmpD
setsepchar,%
readlisttmpCtmpD%
deftmpBtmpC%
fi
if+@findopsep[1]relax
deftmpvecadd#1%
elseif-@findopsep[1]relax
deftmpvecsub#1%
elseif.@findopsep[1]relax
deftmpvecdot#1%
elseif x@findopsep[1]relax
deftmpveccross#1%
fifififi
expandafterexpandafterexpandaftertmpexpandaftertmpAtmpB
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
VP:vecparseCA+B
C[]
vecsubCAB
C[]
VP:vecparseCA - B
C[]
vecdotCAB
C[]
VP:vecparseCA .B
C[]
veccrossCAB
C[]
VP:vecparseCA xB
C[]
VP:vecparseCA x(3,5,6)
C[]
VP:vecparseC(3,5,6)xB
C[]
VP:vecparseC(1,1,1)x(1,2,3)
C[]
enddocument
edited 9 hours ago
Steven B. Segletes
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
I was thinking more of expressions likeA+(4,5,6)which are a lot easier when A expands to1,2,3directly.
– John Kormylo
11 hours ago
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
|
show 6 more comments
4
4
4
Just for fun, I wrote routines for 3D vector addition, subtraction, cross product and dot product (scalar treated as a 1D vector). I was trying to actually parse expressions of the form A+B but eventually gave up.
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
vecsubCAB
C[]
vecdotCAB
C[]
veccrossCAB
C[]
enddocument
SUPPLEMENT
I hope John doesn't mind me (Steven B Segletes) adding his sought-after parser to the code. This allows input of the form vecparseCA+B, vecparseCA - B, vecparseCA .B, and vecparseCA xB (extra spaces of no consequence).
Support added not only for vecparseCA xB, but also vecparseCA x(3,5,6), vecparseC(3,5,6)xB and vecparseC(1,1,1)x(1,2,3).
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
setsepchar,%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecparse#1#2%
setsepcharx%
readlist*@findop#2%
ifnumlistlen@findop[1]=1relax
itemtomacro@findop[1]tmpA
else
itemtomacro@findop[1,2]tmpF
setsepchar,%
readlisttmpEtmpF%
deftmpAtmpE%
fi
ifnumlistlen@findop[2]=1relax
itemtomacro@findop[2]tmpB
else
itemtomacro@findop[2,2]tmpD
setsepchar,%
readlisttmpCtmpD%
deftmpBtmpC%
fi
if+@findopsep[1]relax
deftmpvecadd#1%
elseif-@findopsep[1]relax
deftmpvecsub#1%
elseif.@findopsep[1]relax
deftmpvecdot#1%
elseif x@findopsep[1]relax
deftmpveccross#1%
fifififi
expandafterexpandafterexpandaftertmpexpandaftertmpAtmpB
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
VP:vecparseCA+B
C[]
vecsubCAB
C[]
VP:vecparseCA - B
C[]
vecdotCAB
C[]
VP:vecparseCA .B
C[]
veccrossCAB
C[]
VP:vecparseCA xB
C[]
VP:vecparseCA x(3,5,6)
C[]
VP:vecparseC(3,5,6)xB
C[]
VP:vecparseC(1,1,1)x(1,2,3)
C[]
enddocument
edited 9 hours ago
Steven B. Segletes
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
Just for fun, I wrote routines for 3D vector addition, subtraction, cross product and dot product (scalar treated as a 1D vector). I was trying to actually parse expressions of the form A+B but eventually gave up.
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
readlist#1@vecargs
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
vecsubCAB
C[]
vecdotCAB
C[]
veccrossCAB
C[]
enddocument
SUPPLEMENT
I hope John doesn't mind me (Steven B Segletes) adding his sought-after parser to the code. This allows input of the form vecparseCA+B, vecparseCA - B, vecparseCA .B, and vecparseCA xB (extra spaces of no consequence).
Support added not only for vecparseCA xB, but also vecparseCA x(3,5,6), vecparseC(3,5,6)xB and vecparseC(1,1,1)x(1,2,3).
documentclassarticle
usepackagelistofitems
usepackagepgfmath
usepackageamsmath
makeatletter
newcommand@vecargs% reserve global names
newcommandvecadd
newcommandvecsub
newcommandvecdot
newcommandveccross
newcommandvecparse
defvecadd#1#2#3% #1 = #2 + #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]+#3[1]%
pgfmathsetmacro@y#2[2]+#3[2]%
pgfmathsetmacro@z#2[3]+#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecsub#1#2#3% #1 = #2 - #3
bgroup% local definitions
pgfmathsetmacro@x#2[1]-#3[1]%
pgfmathsetmacro@y#2[2]-#3[2]%
pgfmathsetmacro@z#2[3]-#3[3]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecdot#1#2#3% #1 = #2 cdot #3
pgfmathsetmacro@vecargs#2[1]*#3[1] + #2[2]*#3[2] + #3[3]*#3[3]%
setsepchar,%
readlist#1@vecargs
defveccross#1#2#3% #1 = #2 times #3
bgroup% local definitions
pgfmathsetmacro@x#2[2]*#3[3] - #2[3]*#3[2]%
pgfmathsetmacro@y#2[3]*#3[1] - #2[1]*#3[3]%
pgfmathsetmacro@z#2[1]*#3[2] - #2[2]*#3[1]%
xdef@vecargs@x,@y,@z%
egroup
setsepchar,%
readlist#1@vecargs
defvecparse#1#2%
setsepcharx%
readlist*@findop#2%
ifnumlistlen@findop[1]=1relax
itemtomacro@findop[1]tmpA
else
itemtomacro@findop[1,2]tmpF
setsepchar,%
readlisttmpEtmpF%
deftmpAtmpE%
fi
ifnumlistlen@findop[2]=1relax
itemtomacro@findop[2]tmpB
else
itemtomacro@findop[2,2]tmpD
setsepchar,%
readlisttmpCtmpD%
deftmpBtmpC%
fi
if+@findopsep[1]relax
deftmpvecadd#1%
elseif-@findopsep[1]relax
deftmpvecsub#1%
elseif.@findopsep[1]relax
deftmpvecdot#1%
elseif x@findopsep[1]relax
deftmpveccross#1%
fifififi
expandafterexpandafterexpandaftertmpexpandaftertmpAtmpB
makeatother
begindocument
readlistA1,2,3
readlistB4,5,6
vecaddCAB
C[]
VP:vecparseCA+B
C[]
vecsubCAB
C[]
VP:vecparseCA - B
C[]
vecdotCAB
C[]
VP:vecparseCA .B
C[]
veccrossCAB
C[]
VP:vecparseCA xB
C[]
VP:vecparseCA x(3,5,6)
C[]
VP:vecparseC(3,5,6)xB
C[]
VP:vecparseC(1,1,1)x(1,2,3)
C[]
enddocument
edited 9 hours ago
Steven B. Segletes
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
edited 9 hours ago
Steven B. Segletes
160k9205413
edited 9 hours ago
Steven B. Segletes
160k9205413
edited 9 hours ago
Steven B. Segletes
160k9205413
160k9205413
answered yesterday
John KormyloJohn Kormylo
46.3k22672
answered yesterday
John KormyloJohn Kormylo
46.3k22672
answered yesterday
John KormyloJohn Kormylo
46.3k22672
46.3k22672
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
I was thinking more of expressions likeA+(4,5,6)which are a lot easier when A expands to1,2,3directly.
– John Kormylo
11 hours ago
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
|
show 6 more comments
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
I was thinking more of expressions likeA+(4,5,6)which are a lot easier when A expands to1,2,3directly.
– John Kormylo
11 hours ago
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
That is really nice.
– Steven B. Segletes
yesterday
That is really nice.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
I hope you don't mind my edit.
– Steven B. Segletes
yesterday
1
1
I was thinking more of expressions like
A+(4,5,6) which are a lot easier when A expands to 1,2,3 directly.– John Kormylo
11 hours ago
I was thinking more of expressions like
A+(4,5,6) which are a lot easier when A expands to 1,2,3 directly.– John Kormylo
11 hours ago
1
1
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
@marmot I think it would be possible, but would require quite a bit more effort. Any time the input is allowed to be in a free format, requiring sub-evaluations of the components that can than comprise larger components...well a more careful approach is required.
– Steven B. Segletes
9 hours ago
1
1
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
@marmot It would likely require an approach like tex.stackexchange.com/questions/332012/…, where an order of operations hierarchy is established, and the input parsed along those lines. But rather than just typesetting the result, vector mechanics needs to be performed.
– Steven B. Segletes
8 hours ago
|
show 6 more comments
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y2,2Lq9Frv5faMSHI0mKuom y
Among the existing proposals, to my knowledge this one might be the most promising one. The open problem, though, is that the transformation is to "recorded". Some advanced transformation recording can be found here. But it seems that you are looking for something else.
– marmot
yesterday
Asymptote is a good choice
– Black Mild
yesterday
The bad news for you is that TikZ do not keep track of the 3d points. The code
(1,2,3)is just fancy interface for a 2d point (that is a projection of this 3d point).– Kpym
yesterday