How to draw an arc for a bullet

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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5
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My apologies in advance if you feel that this question is more about drawing instead of being technical.



The following diagram is what I want to replicate in Latex:
desired output



I believe I have done most of the work, except for the bullet. The bullet has a round tip, which I am finding it hard to draw. The red lines are the sides of the bullet that I want to connect with the tip.



Could anyone suggest how to go from here?



What I have so far



documentclassarticle
usepackageamsmath
usepackagetikz
usetikzlibraryshapes.misc
usetikzlibraryarrows
usepackagemathtools
usepackagepgfplots
usepackageamsmath
begindocument
tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
text\
begintikzpicture[x=0.5cm,y=0.5cm,z=0.3cm,>=stealth,scale=0.8]
% The axes
draw[ultra thick,->] (xyz cs:x=-18.5,y=+2) -- (xyz cs:x=18.5,y=-2);
draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5);
%draw[ultra thick,dashed,->] (xyz cs:x=13,z=+10.5) -- (xyz cs:x=-13,z=-10.5);
draw[ultra thick,dashed,opacity=0.4] (xyz cs:x=0,z=0) -- (xyz cs:x=9.2,z=+7.3);
draw[ultra thick,dashed] (xyz cs:x=9.2,z=7.3) -- (xyz cs:x=13,z=+10.5);
draw[ultra thick,dashed,->] (xyz cs:x=0,z=0) -- (xyz cs:x=-13,z=-10.5);
%%
%rectangle
draw[draw=none,ultra thick,fill=gray!50,opacity=0.5]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=+12,y=9.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=-12,y=-10)
-- (xyz cs:x=-12,y=+12);
%
%Thickness of the sample
draw[draw=none,ultra thick,fill=gray!50,opacity=0.3]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=-10.5,y=12.5)
-- (xyz cs:x=+13.5-0.25,y=10)
-- (xyz cs:x=+12,y=9.5)
%-- (xyz cs:x=-12,y=+12)
;
%
draw[draw=none,ultra thick,fill=gray!90,opacity=0.5]
%(xyz cs:x=12,y=9.5)
(xyz cs:x=+13.5-0.05,y=+10+0.02)
-- (xyz cs:x=+13.5-0.051,y=-12)
%-- (xyz cs:x=+12.5,y=+9.5-22+0.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=+12,y=9.5)
;
%draw[fill=black](xyz cs:x=0,y=0,z=0) circle (3pt);
%draw a cross 
draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
%
%Labels
node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
node [below,scale=2] at (xyz cs:x=+18,y=-2.3) $x$;
node [above,scale=2] at (xyz cs:y=+18.5) $y$;
node [below,scale=2] at (xyz cs:z=-11,x=-12) $z$;
%
node [below,scale=2] at (xyz cs:x=-30,z=27) textSample;
%
%Bullet
draw[draw=none,fill=gray!50,opacity=0.5] (xyz cs:x=-14,y=-4.5) circle [x radius=5.5mm, y radius=7mm];
draw[red] (xyz cs:x=-14,y=-3.12) -- (xyz cs:x=-11,y=-2.12);
draw[red] (xyz cs:x=-14,y=-3.12-2.8) -- (xyz cs:x=-9.5,y=-4.49);
%draw[blue] (xyz cs:x=-11,y=-2.12) parabola (xyz cs:x=-9.5,y=-4.49);
endtikzpicture
enddocument


Thank you!






tikz-pgf technical-drawing draw arc







share|improve this question

















  • 2




    I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
    – marmot
    3 hours ago














up vote
5
down vote

favorite












My apologies in advance if you feel that this question is more about drawing instead of being technical.



The following diagram is what I want to replicate in Latex:
desired output



I believe I have done most of the work, except for the bullet. The bullet has a round tip, which I am finding it hard to draw. The red lines are the sides of the bullet that I want to connect with the tip.



Could anyone suggest how to go from here?



What I have so far



documentclassarticle
usepackageamsmath
usepackagetikz
usetikzlibraryshapes.misc
usetikzlibraryarrows
usepackagemathtools
usepackagepgfplots
usepackageamsmath
begindocument
tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
text\
begintikzpicture[x=0.5cm,y=0.5cm,z=0.3cm,>=stealth,scale=0.8]
% The axes
draw[ultra thick,->] (xyz cs:x=-18.5,y=+2) -- (xyz cs:x=18.5,y=-2);
draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5);
%draw[ultra thick,dashed,->] (xyz cs:x=13,z=+10.5) -- (xyz cs:x=-13,z=-10.5);
draw[ultra thick,dashed,opacity=0.4] (xyz cs:x=0,z=0) -- (xyz cs:x=9.2,z=+7.3);
draw[ultra thick,dashed] (xyz cs:x=9.2,z=7.3) -- (xyz cs:x=13,z=+10.5);
draw[ultra thick,dashed,->] (xyz cs:x=0,z=0) -- (xyz cs:x=-13,z=-10.5);
%%
%rectangle
draw[draw=none,ultra thick,fill=gray!50,opacity=0.5]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=+12,y=9.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=-12,y=-10)
-- (xyz cs:x=-12,y=+12);
%
%Thickness of the sample
draw[draw=none,ultra thick,fill=gray!50,opacity=0.3]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=-10.5,y=12.5)
-- (xyz cs:x=+13.5-0.25,y=10)
-- (xyz cs:x=+12,y=9.5)
%-- (xyz cs:x=-12,y=+12)
;
%
draw[draw=none,ultra thick,fill=gray!90,opacity=0.5]
%(xyz cs:x=12,y=9.5)
(xyz cs:x=+13.5-0.05,y=+10+0.02)
-- (xyz cs:x=+13.5-0.051,y=-12)
%-- (xyz cs:x=+12.5,y=+9.5-22+0.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=+12,y=9.5)
;
%draw[fill=black](xyz cs:x=0,y=0,z=0) circle (3pt);
%draw a cross 
draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
%
%Labels
node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
node [below,scale=2] at (xyz cs:x=+18,y=-2.3) $x$;
node [above,scale=2] at (xyz cs:y=+18.5) $y$;
node [below,scale=2] at (xyz cs:z=-11,x=-12) $z$;
%
node [below,scale=2] at (xyz cs:x=-30,z=27) textSample;
%
%Bullet
draw[draw=none,fill=gray!50,opacity=0.5] (xyz cs:x=-14,y=-4.5) circle [x radius=5.5mm, y radius=7mm];
draw[red] (xyz cs:x=-14,y=-3.12) -- (xyz cs:x=-11,y=-2.12);
draw[red] (xyz cs:x=-14,y=-3.12-2.8) -- (xyz cs:x=-9.5,y=-4.49);
%draw[blue] (xyz cs:x=-11,y=-2.12) parabola (xyz cs:x=-9.5,y=-4.49);
endtikzpicture
enddocument


Thank you!






tikz-pgf technical-drawing draw arc







share|improve this question

















  • 2




    I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
    – marmot
    3 hours ago












up vote
5
down vote

favorite









up vote
5
down vote

favorite











My apologies in advance if you feel that this question is more about drawing instead of being technical.



The following diagram is what I want to replicate in Latex:
desired output



I believe I have done most of the work, except for the bullet. The bullet has a round tip, which I am finding it hard to draw. The red lines are the sides of the bullet that I want to connect with the tip.



Could anyone suggest how to go from here?



What I have so far



documentclassarticle
usepackageamsmath
usepackagetikz
usetikzlibraryshapes.misc
usetikzlibraryarrows
usepackagemathtools
usepackagepgfplots
usepackageamsmath
begindocument
tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
text\
begintikzpicture[x=0.5cm,y=0.5cm,z=0.3cm,>=stealth,scale=0.8]
% The axes
draw[ultra thick,->] (xyz cs:x=-18.5,y=+2) -- (xyz cs:x=18.5,y=-2);
draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5);
%draw[ultra thick,dashed,->] (xyz cs:x=13,z=+10.5) -- (xyz cs:x=-13,z=-10.5);
draw[ultra thick,dashed,opacity=0.4] (xyz cs:x=0,z=0) -- (xyz cs:x=9.2,z=+7.3);
draw[ultra thick,dashed] (xyz cs:x=9.2,z=7.3) -- (xyz cs:x=13,z=+10.5);
draw[ultra thick,dashed,->] (xyz cs:x=0,z=0) -- (xyz cs:x=-13,z=-10.5);
%%
%rectangle
draw[draw=none,ultra thick,fill=gray!50,opacity=0.5]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=+12,y=9.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=-12,y=-10)
-- (xyz cs:x=-12,y=+12);
%
%Thickness of the sample
draw[draw=none,ultra thick,fill=gray!50,opacity=0.3]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=-10.5,y=12.5)
-- (xyz cs:x=+13.5-0.25,y=10)
-- (xyz cs:x=+12,y=9.5)
%-- (xyz cs:x=-12,y=+12)
;
%
draw[draw=none,ultra thick,fill=gray!90,opacity=0.5]
%(xyz cs:x=12,y=9.5)
(xyz cs:x=+13.5-0.05,y=+10+0.02)
-- (xyz cs:x=+13.5-0.051,y=-12)
%-- (xyz cs:x=+12.5,y=+9.5-22+0.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=+12,y=9.5)
;
%draw[fill=black](xyz cs:x=0,y=0,z=0) circle (3pt);
%draw a cross 
draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
%
%Labels
node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
node [below,scale=2] at (xyz cs:x=+18,y=-2.3) $x$;
node [above,scale=2] at (xyz cs:y=+18.5) $y$;
node [below,scale=2] at (xyz cs:z=-11,x=-12) $z$;
%
node [below,scale=2] at (xyz cs:x=-30,z=27) textSample;
%
%Bullet
draw[draw=none,fill=gray!50,opacity=0.5] (xyz cs:x=-14,y=-4.5) circle [x radius=5.5mm, y radius=7mm];
draw[red] (xyz cs:x=-14,y=-3.12) -- (xyz cs:x=-11,y=-2.12);
draw[red] (xyz cs:x=-14,y=-3.12-2.8) -- (xyz cs:x=-9.5,y=-4.49);
%draw[blue] (xyz cs:x=-11,y=-2.12) parabola (xyz cs:x=-9.5,y=-4.49);
endtikzpicture
enddocument


Thank you!






tikz-pgf technical-drawing draw arc







share|improve this question













My apologies in advance if you feel that this question is more about drawing instead of being technical.



The following diagram is what I want to replicate in Latex:
desired output



I believe I have done most of the work, except for the bullet. The bullet has a round tip, which I am finding it hard to draw. The red lines are the sides of the bullet that I want to connect with the tip.



Could anyone suggest how to go from here?



What I have so far



documentclassarticle
usepackageamsmath
usepackagetikz
usetikzlibraryshapes.misc
usetikzlibraryarrows
usepackagemathtools
usepackagepgfplots
usepackageamsmath
begindocument
tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
text\
begintikzpicture[x=0.5cm,y=0.5cm,z=0.3cm,>=stealth,scale=0.8]
% The axes
draw[ultra thick,->] (xyz cs:x=-18.5,y=+2) -- (xyz cs:x=18.5,y=-2);
draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5);
%draw[ultra thick,dashed,->] (xyz cs:x=13,z=+10.5) -- (xyz cs:x=-13,z=-10.5);
draw[ultra thick,dashed,opacity=0.4] (xyz cs:x=0,z=0) -- (xyz cs:x=9.2,z=+7.3);
draw[ultra thick,dashed] (xyz cs:x=9.2,z=7.3) -- (xyz cs:x=13,z=+10.5);
draw[ultra thick,dashed,->] (xyz cs:x=0,z=0) -- (xyz cs:x=-13,z=-10.5);
%%
%rectangle
draw[draw=none,ultra thick,fill=gray!50,opacity=0.5]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=+12,y=9.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=-12,y=-10)
-- (xyz cs:x=-12,y=+12);
%
%Thickness of the sample
draw[draw=none,ultra thick,fill=gray!50,opacity=0.3]
(xyz cs:x=-12,y=+12)
-- (xyz cs:x=-10.5,y=12.5)
-- (xyz cs:x=+13.5-0.25,y=10)
-- (xyz cs:x=+12,y=9.5)
%-- (xyz cs:x=-12,y=+12)
;
%
draw[draw=none,ultra thick,fill=gray!90,opacity=0.5]
%(xyz cs:x=12,y=9.5)
(xyz cs:x=+13.5-0.05,y=+10+0.02)
-- (xyz cs:x=+13.5-0.051,y=-12)
%-- (xyz cs:x=+12.5,y=+9.5-22+0.5)
-- (xyz cs:x=+12,y=-12.5)
-- (xyz cs:x=+12,y=9.5)
;
%draw[fill=black](xyz cs:x=0,y=0,z=0) circle (3pt);
%draw a cross 
draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
%
%Labels
node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
node [below,scale=2] at (xyz cs:x=+18,y=-2.3) $x$;
node [above,scale=2] at (xyz cs:y=+18.5) $y$;
node [below,scale=2] at (xyz cs:z=-11,x=-12) $z$;
%
node [below,scale=2] at (xyz cs:x=-30,z=27) textSample;
%
%Bullet
draw[draw=none,fill=gray!50,opacity=0.5] (xyz cs:x=-14,y=-4.5) circle [x radius=5.5mm, y radius=7mm];
draw[red] (xyz cs:x=-14,y=-3.12) -- (xyz cs:x=-11,y=-2.12);
draw[red] (xyz cs:x=-14,y=-3.12-2.8) -- (xyz cs:x=-9.5,y=-4.49);
%draw[blue] (xyz cs:x=-11,y=-2.12) parabola (xyz cs:x=-9.5,y=-4.49);
endtikzpicture
enddocument


Thank you!






tikz-pgf technical-drawing draw arc




tikz-pgf technical-drawing draw arc






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 3 hours ago









Will Kim

630417




630417







  • 2




    I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
    – marmot
    3 hours ago












  • 2




    I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
    – marmot
    3 hours ago







2




2




I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
– marmot
3 hours ago




I guess the biggest improvement will be achieved by switching to tikz-3dplot and using a real orthographic projection.
– marmot
3 hours ago










1 Answer
1






active

oldest

votes

















up vote
4
down vote













Here is a proposal. I translated your picture to tikz-3dplots which makes it IMHO much easier to draw such things. In particular, you have an orthographic projection for free.



documentclass[tikz,border=3.14mm]standalone
usepackageamsmath
usepackagetikz-3dplot
usetikzlibrary3d,shadings,calc,arrows.meta
% small fix for canvas is xy plane at z % https://tex.stackexchange.com/a/48776/121799
makeatletter
tikzoptioncanvas is xy plane at z%
 deftikz@plane@originpgfpointxyz00#1%
 deftikz@plane@xpgfpointxyz10#1%
 deftikz@plane@ypgfpointxyz01#1%
 tikz@canvas@is@plane
makeatother
begindocument
tdplotsetmaincoords70-230
tdplotsetrotatedcoords09090
tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
begintikzpicture[font=sffamily]
beginscope[tdplot_rotated_coords,>=stealth,scale=0.6,local bounding box=3d]
% z axis in background
draw[ultra thick,dotted] (0,0,-24) -- (0,0,0) coordinate (O);
%rectangle
fill[gray!50,opacity=0.5]
(12,12,0) coordinate(tr) -- 
(12,-12,0) coordinate(br) -- 
(-12,-12,0) coordinate(bl) -- 
(-12,12,0) coordinate(tl) -- cycle;
fill[gray!90,opacity=0.5]
(tr) -- ++(0,0,-2) -- ++(0,-24,0) -- (br) -- cycle;
fill[gray!50,opacity=0.3]
(tr) -- ++(0,0,-2) -- ++(-24,0,0) -- (tl) -- cycle;
% The axes
draw[ultra thick,->] (-18.5,0,0) -- (18.5,0,0) node[below,scale=2]$x$;
draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5) node[above,scale=2]$y$;
draw[ultra thick,dotted,->] (0,0,0) --(0,0,10);
%draw a cross 
draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
%
%Labels
node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
%
%Bullet
beginscope[canvas is xy plane at z=10]
coordinate (c1) at (120:1);
coordinate (c2) at (-60:1);
endscope
beginscope[canvas is xy plane at z=16]
fill[gray!50,opacity=0.5] circle (1);
coordinate (b1) at (120:1);
coordinate (b2) at (-60:1);
coordinate (z0) at (0,0);
shade let p1=($(c1)-(b1)$),n1=atan2(y1,x1) in
[top color=black!60,bottom color=black,middle color=gray!30,
shading angle=n1] (b1) -- (c1) to[out=30,in=30,looseness=3] (c2) -- (b2)
arc(-60:120:1);
endscope
draw[ultra thick,dotted,->] (z0) -- (0,0,24) node[below,scale=2]$z$;
coordinate (a1) at (-8,8,0);
endscope
beginscope[every node/.append style=scale=2,shorten >=2mm]
node[anchor=north west] (sample) at (3d.north west) sample;
node[anchor=south west] (bullet) at (3d.south west) bullet;
node[anchor=south east] (origin) at (3d.south east) origin;
draw [-Stealth[length=2mm]] (sample)-- (a1);
draw [-Stealth[length=2mm]] (bullet)-- (z0);
draw [-Stealth[length=2mm]] (origin)-- (O);
endscope
endtikzpicture
enddocument


enter image description here






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    1 Answer
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    active

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    up vote
    4
    down vote













    Here is a proposal. I translated your picture to tikz-3dplots which makes it IMHO much easier to draw such things. In particular, you have an orthographic projection for free.



    documentclass[tikz,border=3.14mm]standalone
    usepackageamsmath
    usepackagetikz-3dplot
    usetikzlibrary3d,shadings,calc,arrows.meta
    % small fix for canvas is xy plane at z % https://tex.stackexchange.com/a/48776/121799
    makeatletter
    tikzoptioncanvas is xy plane at z%
     deftikz@plane@originpgfpointxyz00#1%
     deftikz@plane@xpgfpointxyz10#1%
     deftikz@plane@ypgfpointxyz01#1%
     tikz@canvas@is@plane
    makeatother
    begindocument
    tdplotsetmaincoords70-230
    tdplotsetrotatedcoords09090
    tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
    begintikzpicture[font=sffamily]
    beginscope[tdplot_rotated_coords,>=stealth,scale=0.6,local bounding box=3d]
    % z axis in background
    draw[ultra thick,dotted] (0,0,-24) -- (0,0,0) coordinate (O);
    %rectangle
    fill[gray!50,opacity=0.5]
    (12,12,0) coordinate(tr) -- 
    (12,-12,0) coordinate(br) -- 
    (-12,-12,0) coordinate(bl) -- 
    (-12,12,0) coordinate(tl) -- cycle;
    fill[gray!90,opacity=0.5]
    (tr) -- ++(0,0,-2) -- ++(0,-24,0) -- (br) -- cycle;
    fill[gray!50,opacity=0.3]
    (tr) -- ++(0,0,-2) -- ++(-24,0,0) -- (tl) -- cycle;
    % The axes
    draw[ultra thick,->] (-18.5,0,0) -- (18.5,0,0) node[below,scale=2]$x$;
    draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5) node[above,scale=2]$y$;
    draw[ultra thick,dotted,->] (0,0,0) --(0,0,10);
    %draw a cross 
    draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
    draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
    %
    %Labels
    node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
    %
    %Bullet
    beginscope[canvas is xy plane at z=10]
    coordinate (c1) at (120:1);
    coordinate (c2) at (-60:1);
    endscope
    beginscope[canvas is xy plane at z=16]
    fill[gray!50,opacity=0.5] circle (1);
    coordinate (b1) at (120:1);
    coordinate (b2) at (-60:1);
    coordinate (z0) at (0,0);
    shade let p1=($(c1)-(b1)$),n1=atan2(y1,x1) in
    [top color=black!60,bottom color=black,middle color=gray!30,
    shading angle=n1] (b1) -- (c1) to[out=30,in=30,looseness=3] (c2) -- (b2)
    arc(-60:120:1);
    endscope
    draw[ultra thick,dotted,->] (z0) -- (0,0,24) node[below,scale=2]$z$;
    coordinate (a1) at (-8,8,0);
    endscope
    beginscope[every node/.append style=scale=2,shorten >=2mm]
    node[anchor=north west] (sample) at (3d.north west) sample;
    node[anchor=south west] (bullet) at (3d.south west) bullet;
    node[anchor=south east] (origin) at (3d.south east) origin;
    draw [-Stealth[length=2mm]] (sample)-- (a1);
    draw [-Stealth[length=2mm]] (bullet)-- (z0);
    draw [-Stealth[length=2mm]] (origin)-- (O);
    endscope
    endtikzpicture
    enddocument


    enter image description here






    share|improve this answer


























      up vote
      4
      down vote













      Here is a proposal. I translated your picture to tikz-3dplots which makes it IMHO much easier to draw such things. In particular, you have an orthographic projection for free.



      documentclass[tikz,border=3.14mm]standalone
      usepackageamsmath
      usepackagetikz-3dplot
      usetikzlibrary3d,shadings,calc,arrows.meta
      % small fix for canvas is xy plane at z % https://tex.stackexchange.com/a/48776/121799
      makeatletter
      tikzoptioncanvas is xy plane at z%
       deftikz@plane@originpgfpointxyz00#1%
       deftikz@plane@xpgfpointxyz10#1%
       deftikz@plane@ypgfpointxyz01#1%
       tikz@canvas@is@plane
      makeatother
      begindocument
      tdplotsetmaincoords70-230
      tdplotsetrotatedcoords09090
      tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
      begintikzpicture[font=sffamily]
      beginscope[tdplot_rotated_coords,>=stealth,scale=0.6,local bounding box=3d]
      % z axis in background
      draw[ultra thick,dotted] (0,0,-24) -- (0,0,0) coordinate (O);
      %rectangle
      fill[gray!50,opacity=0.5]
      (12,12,0) coordinate(tr) -- 
      (12,-12,0) coordinate(br) -- 
      (-12,-12,0) coordinate(bl) -- 
      (-12,12,0) coordinate(tl) -- cycle;
      fill[gray!90,opacity=0.5]
      (tr) -- ++(0,0,-2) -- ++(0,-24,0) -- (br) -- cycle;
      fill[gray!50,opacity=0.3]
      (tr) -- ++(0,0,-2) -- ++(-24,0,0) -- (tl) -- cycle;
      % The axes
      draw[ultra thick,->] (-18.5,0,0) -- (18.5,0,0) node[below,scale=2]$x$;
      draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5) node[above,scale=2]$y$;
      draw[ultra thick,dotted,->] (0,0,0) --(0,0,10);
      %draw a cross 
      draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
      draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
      %
      %Labels
      node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
      %
      %Bullet
      beginscope[canvas is xy plane at z=10]
      coordinate (c1) at (120:1);
      coordinate (c2) at (-60:1);
      endscope
      beginscope[canvas is xy plane at z=16]
      fill[gray!50,opacity=0.5] circle (1);
      coordinate (b1) at (120:1);
      coordinate (b2) at (-60:1);
      coordinate (z0) at (0,0);
      shade let p1=($(c1)-(b1)$),n1=atan2(y1,x1) in
      [top color=black!60,bottom color=black,middle color=gray!30,
      shading angle=n1] (b1) -- (c1) to[out=30,in=30,looseness=3] (c2) -- (b2)
      arc(-60:120:1);
      endscope
      draw[ultra thick,dotted,->] (z0) -- (0,0,24) node[below,scale=2]$z$;
      coordinate (a1) at (-8,8,0);
      endscope
      beginscope[every node/.append style=scale=2,shorten >=2mm]
      node[anchor=north west] (sample) at (3d.north west) sample;
      node[anchor=south west] (bullet) at (3d.south west) bullet;
      node[anchor=south east] (origin) at (3d.south east) origin;
      draw [-Stealth[length=2mm]] (sample)-- (a1);
      draw [-Stealth[length=2mm]] (bullet)-- (z0);
      draw [-Stealth[length=2mm]] (origin)-- (O);
      endscope
      endtikzpicture
      enddocument


      enter image description here






      share|improve this answer
























        up vote
        4
        down vote










        up vote
        4
        down vote









        Here is a proposal. I translated your picture to tikz-3dplots which makes it IMHO much easier to draw such things. In particular, you have an orthographic projection for free.



        documentclass[tikz,border=3.14mm]standalone
        usepackageamsmath
        usepackagetikz-3dplot
        usetikzlibrary3d,shadings,calc,arrows.meta
        % small fix for canvas is xy plane at z % https://tex.stackexchange.com/a/48776/121799
        makeatletter
        tikzoptioncanvas is xy plane at z%
         deftikz@plane@originpgfpointxyz00#1%
         deftikz@plane@xpgfpointxyz10#1%
         deftikz@plane@ypgfpointxyz01#1%
         tikz@canvas@is@plane
        makeatother
        begindocument
        tdplotsetmaincoords70-230
        tdplotsetrotatedcoords09090
        tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
        begintikzpicture[font=sffamily]
        beginscope[tdplot_rotated_coords,>=stealth,scale=0.6,local bounding box=3d]
        % z axis in background
        draw[ultra thick,dotted] (0,0,-24) -- (0,0,0) coordinate (O);
        %rectangle
        fill[gray!50,opacity=0.5]
        (12,12,0) coordinate(tr) -- 
        (12,-12,0) coordinate(br) -- 
        (-12,-12,0) coordinate(bl) -- 
        (-12,12,0) coordinate(tl) -- cycle;
        fill[gray!90,opacity=0.5]
        (tr) -- ++(0,0,-2) -- ++(0,-24,0) -- (br) -- cycle;
        fill[gray!50,opacity=0.3]
        (tr) -- ++(0,0,-2) -- ++(-24,0,0) -- (tl) -- cycle;
        % The axes
        draw[ultra thick,->] (-18.5,0,0) -- (18.5,0,0) node[below,scale=2]$x$;
        draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5) node[above,scale=2]$y$;
        draw[ultra thick,dotted,->] (0,0,0) --(0,0,10);
        %draw a cross 
        draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
        draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
        %
        %Labels
        node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
        %
        %Bullet
        beginscope[canvas is xy plane at z=10]
        coordinate (c1) at (120:1);
        coordinate (c2) at (-60:1);
        endscope
        beginscope[canvas is xy plane at z=16]
        fill[gray!50,opacity=0.5] circle (1);
        coordinate (b1) at (120:1);
        coordinate (b2) at (-60:1);
        coordinate (z0) at (0,0);
        shade let p1=($(c1)-(b1)$),n1=atan2(y1,x1) in
        [top color=black!60,bottom color=black,middle color=gray!30,
        shading angle=n1] (b1) -- (c1) to[out=30,in=30,looseness=3] (c2) -- (b2)
        arc(-60:120:1);
        endscope
        draw[ultra thick,dotted,->] (z0) -- (0,0,24) node[below,scale=2]$z$;
        coordinate (a1) at (-8,8,0);
        endscope
        beginscope[every node/.append style=scale=2,shorten >=2mm]
        node[anchor=north west] (sample) at (3d.north west) sample;
        node[anchor=south west] (bullet) at (3d.south west) bullet;
        node[anchor=south east] (origin) at (3d.south east) origin;
        draw [-Stealth[length=2mm]] (sample)-- (a1);
        draw [-Stealth[length=2mm]] (bullet)-- (z0);
        draw [-Stealth[length=2mm]] (origin)-- (O);
        endscope
        endtikzpicture
        enddocument


        enter image description here






        share|improve this answer














        Here is a proposal. I translated your picture to tikz-3dplots which makes it IMHO much easier to draw such things. In particular, you have an orthographic projection for free.



        documentclass[tikz,border=3.14mm]standalone
        usepackageamsmath
        usepackagetikz-3dplot
        usetikzlibrary3d,shadings,calc,arrows.meta
        % small fix for canvas is xy plane at z % https://tex.stackexchange.com/a/48776/121799
        makeatletter
        tikzoptioncanvas is xy plane at z%
         deftikz@plane@originpgfpointxyz00#1%
         deftikz@plane@xpgfpointxyz10#1%
         deftikz@plane@ypgfpointxyz01#1%
         tikz@canvas@is@plane
        makeatother
        begindocument
        tdplotsetmaincoords70-230
        tdplotsetrotatedcoords09090
        tikzsetcross/.style=cross out, draw=black, fill=none, minimum size=5*(#1-pgflinewidth), inner sep=0pt, outer sep=0pt, cross/.default=2pt
        begintikzpicture[font=sffamily]
        beginscope[tdplot_rotated_coords,>=stealth,scale=0.6,local bounding box=3d]
        % z axis in background
        draw[ultra thick,dotted] (0,0,-24) -- (0,0,0) coordinate (O);
        %rectangle
        fill[gray!50,opacity=0.5]
        (12,12,0) coordinate(tr) -- 
        (12,-12,0) coordinate(br) -- 
        (-12,-12,0) coordinate(bl) -- 
        (-12,12,0) coordinate(tl) -- cycle;
        fill[gray!90,opacity=0.5]
        (tr) -- ++(0,0,-2) -- ++(0,-24,0) -- (br) -- cycle;
        fill[gray!50,opacity=0.3]
        (tr) -- ++(0,0,-2) -- ++(-24,0,0) -- (tl) -- cycle;
        % The axes
        draw[ultra thick,->] (-18.5,0,0) -- (18.5,0,0) node[below,scale=2]$x$;
        draw[ultra thick,->] (xyz cs:y=-18.5) -- (xyz cs:y=18.5) node[above,scale=2]$y$;
        draw[ultra thick,dotted,->] (0,0,0) --(0,0,10);
        %draw a cross 
        draw[ultra thick] (xyz cs:x=-0.75,y=+0.75) -- (xyz cs:x=+0.75,y=-0.75);
        draw[ultra thick] (xyz cs:x=-0.75,y=-0.75) -- (xyz cs:x=+0.75,y=+0.75);
        %
        %Labels
        node [below,scale=2] at (xyz cs:x=+1.5,y=-1) $O$;
        %
        %Bullet
        beginscope[canvas is xy plane at z=10]
        coordinate (c1) at (120:1);
        coordinate (c2) at (-60:1);
        endscope
        beginscope[canvas is xy plane at z=16]
        fill[gray!50,opacity=0.5] circle (1);
        coordinate (b1) at (120:1);
        coordinate (b2) at (-60:1);
        coordinate (z0) at (0,0);
        shade let p1=($(c1)-(b1)$),n1=atan2(y1,x1) in
        [top color=black!60,bottom color=black,middle color=gray!30,
        shading angle=n1] (b1) -- (c1) to[out=30,in=30,looseness=3] (c2) -- (b2)
        arc(-60:120:1);
        endscope
        draw[ultra thick,dotted,->] (z0) -- (0,0,24) node[below,scale=2]$z$;
        coordinate (a1) at (-8,8,0);
        endscope
        beginscope[every node/.append style=scale=2,shorten >=2mm]
        node[anchor=north west] (sample) at (3d.north west) sample;
        node[anchor=south west] (bullet) at (3d.south west) bullet;
        node[anchor=south east] (origin) at (3d.south east) origin;
        draw [-Stealth[length=2mm]] (sample)-- (a1);
        draw [-Stealth[length=2mm]] (bullet)-- (z0);
        draw [-Stealth[length=2mm]] (origin)-- (O);
        endscope
        endtikzpicture
        enddocument


        enter image description here







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited 1 hour ago

























        answered 1 hour ago









        marmot

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