SmtC: Show me the Code
Ole Peter Smith
Instituto de Matemática e Estatística
Universidade Federal de Goiás
http://www.olesmith.com.br

3D
  • 3D
  • Rotation in $\mathbb{R}^3$*
Como libertar um povo que preza seus correntes?
Niculau Maquiavel.
< 3D | Rotation in $\mathbb{R}^3$ | PreAmbles >

Is TikZ 3D?

\[ \underline{p}'= \frac{\underline{p} \cdot \underline{v}}{\underline{v} \cdot \underline{v}} \underline{v} \]
TiKZ Listing: Fig.tikz.tex. PDF   PNG   SVG   ZIP*  
\newcommand{\Determinant}[5]
{
   \tikzmath{#5=#1*#4-#2*#3;}
}

\newcommand{\VectorProd}[7]
{
   %Cyclic in 123 and 456
   \Determinant{#2}{#3}{#5}{#6}{\x}
   \Determinant{#3}{#1}{#6}{#4}{\y}
   \Determinant{#1}{#2}{#4}{#5}{\z}
   
   \coordinate (#7) at (\x,\y,\z);
}

\newcommand{\DotProduct}[7]
{
   \tikzmath{#7=#1*#4+#2*#5+#3*#6;}
}

\newcommand{\SqLength}[4]
{
   \tikzmath{#4=#1*#1+#2*#2+#3*#3;}
}

\newcommand{\Projection}[7]
{
   \SqLength{#4}{#5}{#6}{\L}
   \DotProduct{#1}{#2}{#3}{#4}{#5}{#6}{\D}
   
   \tikzmath{\x=#4*\D/\L;}
   \tikzmath{\y=#5*\D/\L;}
   \tikzmath{\z=#6*\D/\L;}
   
   \coordinate (#7) at (\x,\y,\z);
}

\tikzstyle{cs}=[lightgray,very thin,-latex]
\tikzstyle{V}=[gray,thin,-latex]
\tikzstyle{P}=[blue,-latex]

\begin{tikzpicture}
   \coordinate (OO) at (3,3,3);
   \coordinate (O) at (0,0,0);
   \coordinate (i) at (1,0,0);
   \coordinate (j) at (0,1,0);
   \coordinate (k) at (0,0,1);
   
   %Vector p
   \tikzmath{\px=2;}
   \tikzmath{\py=2;}
   \tikzmath{\pz=2;}
   
   \coordinate (P) at (\px,\py,\pz);
   
   
   %Vector v
   \tikzmath{\vx=2;}
   \tikzmath{\vy=1;}
   \tikzmath{\vz=2;}
   \tikzmath{\l=sqrt(\vx*\vx+\vy*\vy+\vz*\vz);}
   \tikzmath{\wx=\vx/\l;}
   \tikzmath{\wy=\vy/\l;}
   \tikzmath{\wz=\vz/\l;}
   
   
   
   \coordinate (V) at (\vx,\vy,\vz);
   
   \Projection{\px}{\py}{\pz}{\vx}{\vy}{\vz}{VP}
    
   \tikzmath{\vpx=\x;}
   \tikzmath{\vpy=\y;}
   \tikzmath{\vpz=\z;}
  
   %Complement vector
   \coordinate (VPP) at (\vpx-\px,\vpy-\py,\vpz-\pz);
   
   
   %p x v
   \VectorProd{\px}{\py}{\pz}{\wx}{\wy}{\wz}{PP}
   
   \tikzmath{\ppx=\x;}
   \tikzmath{\ppy=\y;}
   \tikzmath{\ppz=\z;}
   
   
   \VectorProd{\ppx}{\ppy}{\ppz}{\wx}{\wy}{\wz}{PPP}
   
   \draw [V] (O) -- (V);
   \draw [P] (O) -- (P);
   \draw [P] (O) -- (PP);
   %\draw [P] (O) -- (PPP);
   
   \node[P] at ($(O)!1.1!(P)$) 
      {$\underline{p}$};
      
   \node[V] at ($(O)!1.1!(V)$) 
      {$\underline{v}$};
      
   \node[P] at ($(O)!1.1!(PP)$)
      {$\underline{p} \times \underline{v}$};
      
   %\node[P] at ($(O)!1.1!(PPP)$) 
   %   {$(\underline{p} \times \underline{v}) \times \underline{v}$};
   
   \node[orange,-latex] at ($(O)!1.1!(VP)$) 
      {$\underline{p'}$};
    \node[orange,-latex] at ($(O)!1.1!(VPP)$) 
      {$\underline{p''}$};
  
   
   
   \draw [thick,-latex] (O) -- (VP);
   \draw [thick,-latex] (O) -- (VPP);
  
   \draw[cs] (OO) -- +(i);
   \draw[cs] (OO) -- +(j);
   \draw[cs] (OO) -- +(k);
   
\end{tikzpicture}
< 3D | Rotation in $\mathbb{R}^3$ | PreAmbles >
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