TeX - LaTeX Asked by Thuy Nguyen on April 29, 2021
Based on This paper, I have a Heronian Tetrahedra Are
Lattice Tetrahedra with vertices O(0, 0, 0), A(15, -60, 20), B(96, 120, 128), C(63, 84, 56)
and
based on This answer I tried
documentclass[tikz,border=2 mm,12pt]{standalone}
usepackage{fouriernc}
usepackage{tikz-3dplot-circleofsphere}
begin{document}
tdplotsetmaincoords{75}{170}
begin{tikzpicture}[scale=1/10,line cap=butt,line join=round,tdplot_main_coords,declare function={R= 5*sqrt(451369)/14;%
}]
path
coordinate (O) at (0, 0, 0)
coordinate (A) at (15, -60, 20)
coordinate (B) at (96, 120, 128)
coordinate (C) at (63, 84, 56)
coordinate (I) at (-1383/14, 90/7, 1528/7)
;
begin{scope}[tdplot_screen_coords]
draw[thick] (I) circle (R);
end{scope}
end{tikzpicture}
end{document}
I can’t obtain the result because the Dimension is too large.
Without calculating coordinates of center and radius of sphere, how can I draw the sphere passing through O, A, B, C
?
If your question is how to remove the dimension too large
error, one possible answer is: with fpu
.
documentclass[tikz,border=2 mm,12pt]{standalone}
usepackage{fouriernc}
usepackage{tikz-3dplot-circleofsphere}
usetikzlibrary{fpu}
defpgfmathsetmacroFPU#1#2{begingroup%
pgfkeys{/pgf/fpu,/pgf/fpu/output format=fixed}%
pgfmathsetmacro{#1}{#2}%
pgfmathsmuggle#1endgroup}%
begin{document}
tdplotsetmaincoords{75}{170}
begin{tikzpicture}[scale=1/10,line cap=butt,line join=round,tdplot_main_coords,
%declare function={R= 5*sqrt(451369/(14*14));% }
]
pgfmathsetmacroFPU{myR}{5*sqrt(451369)/14}
path
coordinate (O) at (0, 0, 0)
coordinate (A) at (15, -60, 20)
coordinate (B) at (96, 120, 128)
coordinate (C) at (63, 84, 56)
coordinate (I) at (-1383/14, 90/7, 1528/7)
;
begin{scope}[tdplot_screen_coords]
draw[thick] (I) circle[radius=myR];
end{scope}
end{tikzpicture}
end{document}
Answered by user194703 on April 29, 2021
I just used a hand calculator.
documentclass[tikz,border=2 mm,12pt]{standalone}
usepackage{tikz-3dplot}
begin{document}
tdplotsetmaincoords{75}{170}
begin{tikzpicture}[scale=1/10,line cap=butt,line join=round,tdplot_main_coords]
path
coordinate (O) at (0, 0, 0)
coordinate (A) at (15, -60, 20)
coordinate (B) at (96, 120, 128)
coordinate (C) at (63, 84, 56)
coordinate (I) at (-98.79, 12.86, 218.29)
;
begin{scope}[tdplot_screen_coords]
draw[thick] (I) circle (239.94);
end{scope}
;
draw[thick] (O)--(A) (O)--(B) (O)--(C) (A)--(B) (A)--(C) (B)--(C);
end{tikzpicture}
end{document}
Answered by John Kormylo on April 29, 2021
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