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% roadincline.mp
% L. Nobre G.
% 2004
verbatimtex
\documentclass{article}
\usepackage{palatino}
\usepackage{concmath}
\usepackage{ccfonts}
\begin{document}
etex
beginfig(1);
numeric u, size, halfs, parcel, bordlarg, bordtotal, backdiaglen, backang;
numeric backdown, labelmarg, backauxil, backauyil, angray;
path triborder, backtri, angline;
picture labelalfa, labelv, labelh, labeld;
u = 1mm;
size = 25u;
bordlarg = 3u;
bordtotal = 4u;
backdiaglen = 55u;
backang = 29;
backdown = 2u;
labelmarg = -1u;
angray = 5u;
parcel = 0.16667*sqrt(3)*size;
halfs = 0.5size;
z1 = (-halfs,-parcel);
z2 = ( halfs,-parcel);
z3 = ( 0, 2*parcel );
triborder = z1--z2--z3--cycle;
backauxil = backdiaglen*cosd(backang)*0.5;
backauyil = backdiaglen*sind(backang)*0.5;
z4 = (-backauxil,-backauyil);
z5 = ( backauxil,-backauyil);
z6 = ( backauxil, backauyil);
backtri = z4--z5--z6--cycle;
angline = halfcircle scaled 2angray shifted z4 cutafter (z4--z6);
z7 = z4+(angray,0);
z8 = 0.5[z5,z6];
z9 = z5-(angray,0);
z0 = z6-angray*(cosd(backang),sind(backang));
labelalfa = thelabel.urt( btex $\alpha$ etex, z7 );
labelv = thelabel.lft( btex $v$ etex, z8 );
labelh = thelabel.top( btex $h$ etex, z9 );
labeld = thelabel.bot( btex $d$ etex, z0 );
filldraw backtri;
draw angline withcolor background;
draw labelalfa withcolor background;
draw labelv withcolor background;
draw labelh withcolor background;
draw labeld withcolor background;
draw triborder withcolor background withpen pencircle scaled bordtotal;
draw triborder withcolor red withpen pencircle scaled bordlarg;
label.top( btex X\% etex rotated backang, labelmarg*up );
endfig;
verbatimtex
\end{document}
etex
end.
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