符号付偶数交点数列 { 4, 12, 8, 10, 6, 2 } 始点座標 { (8r,-15,0,0), (4r,-20,0,0) } 射影交点座標 { (r,-90,rK,0), (r,10,r,0), (r,-90,-r,0), (r,10,-rK,0), (r/2,180-10,-r,0), (r/2,180-10,r,0) } 交点間中間点数列 { 0, 1, 0, 1, 0, 1, 0, 3, 0, 0, 0…