... conditions 21 , 31, ** ** *NSET, NSET=CENTER 21 , 36, 49, 60, 69, 76, 83, 90, 97, 104, 111, 118, 127 , 149, 169, 188, 20 5, 22 0, 23 3, 24 4, 25 3, 26 0, 26 7, 27 4, 27 5, 27 6, 27 7, 27 8, 27 9, 28 0, 28 1, 28 2, 28 3, ... b k21 0 b k31 0 b k41 node m k 12 0 0 m k 22 0 0 m k 32 0 0 m k 42 0 0 b k 12 0 b k 22 0 b k 32 0 b k 42 node m k13 0 0 m k23 0 0 m k33 0 0 m k43 0 0 b k13 0 b k23 0 b k33 0 b k43 node m k14 0 0 m k24 ... (9.5) V 123 4 V 123 4 V 123 4 The volume coordinate can also be viewed as the ratio between the distance of the point P and point to the plane 23 4: L2 = L1 = dP 23 4 , d1 23 4 L2 = dP −134 , d1 23 4 L3...