符号付偶数交点数列 { -6, 8, 10, -2, 4 } 始点座標 { (2.3r,-π/4,28r,0), (2.3r,-π/4,25r,0), (2.3r,-π/4,5r,0), (2.3r,-π/4,2.5r,0) } 射影交点座標 { (2.3r,-π/4,0,0), (r,π,-r,0), (r,0,r,0), (2.3r,-3π/4,0,0), (0,0,0,0) } 交点間中点座標 { 0, (6r,12…