<p>单叶双曲面 (x^2)/9+(y^2)/16-(z^2)/25=1<br/>syms s t;<br/>ezmesh(sin(t)*3*sqrt(1+s.^2/25),cos(t)*4*sqrt(1+s.^2/25),s)</p><p>双叶双曲面 (x^2)/9+(y^2)/16-(z^2)/25=-1<br/>syms s t;<br/>ezmesh(sin(t)*3*sqrt(-1+s.^2/25),cos(t)*4*sqrt(-1+s.^2/25),s)</p><p>椭圆抛物面 (x^2)/16+(y^2)/25=2z<br/>syms s t;<br/>ezmesh(sin(t)*4*sqrt(2*s),cos(t)*5*sqrt(2*s),s)</p><p>双曲抛物面 (x^2)/16-(y^2)/25=2z<br/>syms s t;<br/>ezmesh(sec(t)*4*sqrt(2*s),tan(t)*t*sqrt(2*s),s)</p><p>二次锥面 (x^2)/9+(y^2)/16-(z^2)/25=0<br/>syms s t;<br/>ezmesh(sin(t)*3/5*s,cos(t)*4/5*s,s)</p> |