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% geom_casq.mp
% L. Nobre G.
% 1999
input featpost3Dplus2D;
%input la3Dmacros;
%input hlr3Dmacros;
%input plan2Dmacros;
%
verbatimtex
\documentclass{article}
\usepackage{beton}
\usepackage{concmath}
\usepackage{ccfonts}
\begin{document}
etex
beginfig(1);
f := (1.7,1.2,1);
Spread := 150;
color gridvec, sizevec, currpos, starpos, bordpos, orig, axxc, ayyc, azzc;
numeric alphamax, long, base, thetamax;
axxc = (0.8,0,0);
ayyc = (0,0.7,0);
azzc = (0,0,0.4);
sizevec := (11,9,9);
gridvec := (0.1,0.1,0.1);
thetamax := 50;
alphamax := 70;
long := 0.65;
base := 0.3;
starpos := ( -0.5*X(gridvec)*(X(sizevec)-1) ,
-0.5*Y(gridvec)*(Y(sizevec)-1) ,
-0.5*Z(gridvec)*(Z(sizevec)-1) );
bordpos := starpos - 0.5*gridvec;
orig := starpos + 0.5*gridvec + (0.05,0,-0.1);
npf1 := 4;
F1p1 := bordpos;
F1p2 := (X(bordpos),-Y(bordpos), Z(bordpos));
F1p3 := (-X(bordpos),-Y(bordpos), Z(bordpos));
F1p4 := (-X(bordpos),Y(bordpos), Z(bordpos));
npf2 := 4;
F2p1 := (X(bordpos),Y(bordpos), -Z(bordpos));
F2p2 := (X(bordpos),-Y(bordpos), -Z(bordpos));
F2p3 := (-X(bordpos),-Y(bordpos), -Z(bordpos));
F2p4 := (-X(bordpos),Y(bordpos), -Z(bordpos));
NF := 2;
pickup pencircle scaled 1pt;
drawarrow rp(orig)..rp(orig+axxc);
drawarrow rp(orig)..rp(orig+ayyc);
drawarrow rp(orig)..rp(orig+azzc);
label.bot(btex z etex,rp(orig+axxc));
label.bot(btex x etex,rp(orig+ayyc));
label.lft(btex y etex,rp(orig+azzc));
pickup pencircle scaled 1.5pt;
starpos := (base,0,0)+orig;
drawarrow rp(orig)..rp(starpos);
label.bot(btex $\vec{n}_0$ etex,rp(starpos));
currpos := starpos;
starpos := long*(cosd(alphamax),sind(alphamax),0)+orig;
drawarrow rp(orig)..rp(starpos);
label.bot(btex $\vec{H}$ etex,rp(starpos));
angline(starpos,currpos,orig,0.55,btex $\alpha$ etex,bot);
starpos := base*(cosd(thetamax),sind(thetamax),0)+orig;
drawarrow rp(orig)..rp(starpos);
label.bot(btex $\vec{n}$ etex,rp(starpos));
angline(starpos,currpos,orig,0.2,btex $\theta$ etex,bot);
endfig;
verbatimtex
\end{document}
etex
end;
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