成分開始交点数列 { 1, 7 } 符号付偶数交点数列 { 10, 12, 8, 4, 6, 2 } 始点座標 { { (r,-45,2r/3,-4r/3), ( r,0,2r/3,-4r/3) }, { (r,135,-2r/3,4r/3), (r,180,-2r/3,4r/3) } } 射影交点座標 { (r,-45,2r/3,0), (r,-135,-2r/3,0), (r,45,-2r/3,0), (r,135,…