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x = r * cos(s)
y = r * sin(s)

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ÇóµÃ r = sqrt( (6 + z^2) / ( 3 * ( cos(s) )^2 + ( sin(s) )^2 - 8 * sin(s) * cos(s) )

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x = 'cos(s) * sqrt( (6 + z^2) / ( 3 * ( cos(s) )^2 + ( sin(s) )^2 - 8 * sin(s) * cos(s) ) )';
y = 'sin(s) * sqrt( (6 + z^2) / ( 3 * ( cos(s) )^2 + ( sin(s) )^2 - 8 * sin(s) * cos(s) ) )';
z = 'z';
ezsurf(x, y, z, [0, 2*pi, -60, 60]); axis equal;

[ Last edited by yeyunxiao on 2009-9-18 at 13:50 ]
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