Ygthkb

I'm trying to make 3d plot. Unfortunately, I can't succeed in getting the desired figure, as shown below.

Here is the figure, where it's a sphere have a charge of -1 inside. And coordinate axes are supposed to be blur inside the sphere may not be dashed.

Still a MWE:

%% Copyright 2009 Jeffrey D. Hein

%

% This work may be distributed and/or modified under the

% conditions of the LaTeX Project Public License, either version 1.3

% of this license or (at your option) any later version.

% The latest version of this license is in

%   http://www.latex-project.org/lppl.txt

% and version 1.3 or later is part of all distributions of LaTeX

% version 2005/12/01 or later.

%

% This work has the LPPL maintenance status `maintained'.

% 

% The Current Maintainer of this work is Jeffrey D. Hein.

%

% This work consists of the files 3dplot.sty and 3dplot.tex



%Description

%-----------

%3dplot.tex - an example file demonstrating the use of the 3dplot.sty package.



%Created 2009-11-07 by Jeff Hein.  Last updated: 2009-11-09

%----------------------------------------------------------



%Update Notes

%------------



%2009-11-07: Created file along with 3dplot.sty package





documentclass{article}

usepackage{tikz}   %TikZ is required for this to work.  Make sure this exists before the next line



usepackage{3dplot} %requires 3dplot.sty to be in same directory, or in your LaTeX installation



usepackage[active,tightpage]{preview}  %generates a tightly fitting border around the work

PreviewEnvironment{tikzpicture}

setlengthPreviewBorder{2mm}



begin{document}



    %Angle Definitions

    %-----------------



    %set the plot display orientation

    %synatax: tdplotsetdisplay{theta_d}{phi_d}

    tdplotsetmaincoords{45}{135}



    %define polar coordinates for some vector

    %TODO: look into using 3d spherical coordinate system

    pgfmathsetmacro{rvec}{.8}

    pgfmathsetmacro{thetavec}{45}

    pgfmathsetmacro{phivec}{60}



    %start tikz picture, and use the tdplot_main_coords style to implement the display 

    %coordinate transformation provided by 3dplot

    begin{tikzpicture}[scale=5,tdplot_main_coords]



    % Teken eerst de bol

    shade[tdplot_screen_coords,ball color = white] (0,0) circle (rvec);



    %set up some coordinates 

    %-----------------------

    coordinate (O) at (0,0,0);



    %determine a coordinate (P) using (r,theta,phi) coordinates.  This command

    %also determines (Pxy), (Pxz), and (Pyz): the xy-, xz-, and yz-projections

    %of the point (P).

    %syntax: tdplotsetcoord{Coordinate name without parentheses}{r}{theta}{phi}

    tdplotsetcoord{P}{rvec}{thetavec}{phivec}



    %draw figure contents

    %--------------------



    %draw the main coordinate system axes

    draw[thick,->] (0,0,0) -- (-1.5,0,0)-- (1.5,0,0) node[anchor=north east]{$x$};

    draw[thick,->] (0,0,0) -- (0,-1.5,0)--(0,1.5,0) node[anchor=north west]{$y$};

    draw[thick,->] (0,0,-1) -- (0,0,-1.5)-- (0,0,1.5) node[anchor=south]{$z$};











    end{tikzpicture}



end{document}

Edited image:

Based on tikz-3dplot package definitions.

    documentclass{article}

    usepackage{tikz}   

    usepackage{tikz-3dplot}



    documentclass{article}

usepackage{tikz}   

usepackage{tikz-3dplot}



begin{document}



%Angle Definitions

%-----------------



%set the plot display orientation

%syntax: tdplotsetdisplay{theta_d}{phi_d}

tdplotsetmaincoords{65}{110}

pgfmathsetmacro{rvec}{1}

pgfmathsetmacro{thetavecc}{55}

pgfmathsetmacro{phivecc}{35}

pgfmathsetmacro{thetaveccc}{39.7}

pgfmathsetmacro{phiveccc}{55}



begin{tikzpicture}[scale=5,tdplot_main_coords,>=latex]



shadedraw[tdplot_screen_coords,ball color = white] (0,0) circle (rvec);

node[tdplot_screen_coords,xshift=1cm,yshift=3mm] (0,0) {$q=-1$};



defh{1} 



%-----------------------

coordinate (O) at (0,0,0);



%draw the main coordinate system axes

draw[thick,opacity=0.5] (0,0,0) -- (1,0,0);

draw[thick,opacity=0.5] (0,0,0) -- (0,1,0);

draw[thick,opacity=0.5] (0,0,0) -- (0,0,1);

draw[thick,->] (1,0,0) -- (2.3,0,0) node[anchor=north east]{$x$};

draw[thick,->] (0,1,0) -- (0,1.5,0) node[anchor=north west]{$y$};

draw[thick,->] (0,0,1) -- (0,0,1.5) node[anchor=south]{$z$};



% Equator 

draw[dashed] (rvec,0,0) arc (0:360:rvec);

draw[thick] (rvec,0,0) arc (0:110:rvec);

draw[thick] (rvec,0,0) arc (0:-70:rvec);



% Flux arrows

foreach t in {10,20,...,340}

        foreach f in {180,170,...,0}

            draw [black!60,opacity=1.0, <-, thick]

                ({sin(f - h)*cos(t - h)}, {sin(f - h)*sin(t - h)}, {cos(f - h)})

                -- ({(1 + 0.2*cos(90 - f))*sin(f - h)*cos(t - h)},

                    {(1 + 0.2*cos(90 - f))*sin(f - h)*sin(t - h)},

                    {(1 + 0.2*cos(90 - f))*cos(f - h)});



end{tikzpicture}

end{document}

The following code does draw the sphere (above the axes to hide them) and the -1. It uses tikz-3dplot which is in TeX Live.

documentclass[tikz]{standalone}

usepackage{tikz-3dplot}



begin{document}

    tdplotsetmaincoords{60}{135}



    pgfmathsetmacro{rvec}{.8}



    begin{tikzpicture}[scale=5,tdplot_main_coords]

    coordinate (O) at (0,0,0);



    draw[thick,->] (-1.5,0,0)-- (1.5,0,0) node[anchor=north east]{$x$};

    draw[thick,->] (0,-1.5,0)--(0,1.5,0) node[anchor=north west]{$y$};

    draw[thick,->] (0,0,-1.5)-- (0,0,1.5) node[anchor=south]{$z$};



    shade[tdplot_screen_coords,ball color = white] (0,0) circle (rvec);



    foreach i in {0,20,...,360}

      draw[tdplot_screen_coords,<-] (i:.9*rvec) -- (i: 1.1*rvec);



    node[tdplot_screen_coords] (0,0) {$-1$};

    end{tikzpicture}

end{document}