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earthen:就在LDE里。 #s-iy+/1oN conic (2011-12-31 14:13) qQ[b VD\*
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fumm20:但就是不知到如何設(shè)置滿足方程y2=4fx 的拋物面,急啊。各位獻(xiàn)個(gè)策呀 (2011-12-31 15:01) U!5)5c}G
phoenixzqy:呵呵呵,你上過高中就應(yīng)當(dāng)會(huì)的啊。將拋物面方程轉(zhuǎn)化成半徑r和conic的表達(dá)式,不就知道半徑是多少了? (2011-12-31 19:54) UnWW/]E
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