符号付偶数交点数列 { 20,-18,-24,22,-2,-4,8,6,-12,-10,14,16 } 始点座標 { (r,-90,0,-4r), (r,-90,0,-2r) } 射影交点座標 { (r,-90,0,-r), (0.8r,180,0,0), (r,90,0,r), (0.8r,0,0,0), (0.9r,-90-5,0,0), (rK,135,0,0), (0.7r,-45-10,0,0), (rK,45,0,0), (…