符号付偶数交点数列 { -24,26,-28,18,12,22,-2,-4,20,6,-8,10,-14,-16 } 始点座標 { (2R,-90,0,0), (R,-90,0,0) } 射影交点座標 { (r,-90,0,-3r/4), (r,180,0,0), (r,90,0,3r/4), (r,0,0,3r/4), (r,-60,0,0), (1.3r,-30,0,-2.2r/4), (r,-120,0,0), (r,180,0,…