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% revolipsoid.mp
% L. Nobre G.
% 2011
input featpost3Dplus2D;
prologues := 1;
Spread := 20;
f := 7.1*(3,5,4);
ShadowOn := true;
HoriZon := -5;
LightSource := 10*(4,-2,4);
beginfig(1);
setthestage(30,45);
drawoptions( withpen pencircle scaled 1mm );
numeric num, r, ste, i, j, aux;
r = 1.6;
num = 5;
aux = 0.5*(num-1);
ste = 90/aux;
for i=-aux upto aux:
for j=-aux upto aux:
spheroid((red*j+green*i)*2*(r**aux),(cosd(i*ste),0,sind(i*ste)),r**(-j));
endfor;
endfor;
endfig;
ShadowOn := false;
beginfig(2);
drawoptions( withpen pencircle scaled 1mm );
numeric num, r, ste, i, j, aux, fac;
color aim;
r = 0.55;
fac = 0.6;
num = 6;
aux = 0.5*(num-1);
ste = 90/aux;
for i=-aux upto aux:
for j=-aux upto aux:
aim := N(f-viewcentr)+fac*(i*red+j*green)/aux;
spheroid((red*j+green*i)*3*r,aim,r);
endfor;
endfor;
endfig;
end.
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