符号付偶数交点数列 { -6, 14, -12, -18, 16, -2, 4, 20, -8, 10 } 始点座標 { (2r,-45,12r,-2r), (r,-45,10r,-2r) } 射影交点座標 { (r,-90,7.5r,-r), (rK,135,8r,r), (rK,-45,8r,r), (rK,-45,-8r,-1.1r), (rK,135,-8r,-r), (rK,-135,8r,r), (rK,45,8r,2r),…