10 const double s = x[1];
11 const double t = x[2];
13 N[0] = -0.0625 * (1.0 - r) * (1.0 - s) * (1.0 - t) *
14 (4.0 + 3.0 * r + 3.0 * s + 2.0 * r * s + 2.0 * t + r * t + s * t +
16 N[1] = -0.0625 * (1.0 + r) * (1.0 - s) * (1.0 - t) *
17 (4.0 - 3.0 * r + 3.0 * s - 2.0 * r * s + 2.0 * t - r * t + s * t -
19 N[2] = -0.0625 * (1.0 + r) * (1.0 + s) * (1.0 - t) *
20 (4.0 - 3.0 * r - 3.0 * s + 2.0 * r * s + 2.0 * t - r * t - s * t +
22 N[3] = -0.0625 * (1.0 - r) * (1.0 + s) * (1.0 - t) *
23 (4.0 + 3.0 * r - 3.0 * s - 2.0 * r * s + 2.0 * t + r * t - s * t -
25 N[4] = 0.5 * t * (1.0 + t);
26 N[5] = 0.125 * (1.0 - r * r) * (1.0 - s) * (1.0 - t) * (2.0 + s + s * t);
27 N[6] = 0.125 * (1.0 + r) * (1.0 - s * s) * (1.0 - t) * (2.0 - r - r * t);
28 N[7] = 0.125 * (1.0 - r * r) * (1.0 + s) * (1.0 - t) * (2.0 - s - s * t);
29 N[8] = 0.125 * (1.0 - r) * (1.0 - s * s) * (1.0 - t) * (2.0 + r + r * t);
30 N[9] = 0.25 * (1.0 - r) * (1.0 - s) * (1.0 - t * t);
31 N[10] = 0.25 * (1.0 + r) * (1.0 - s) * (1.0 - t * t);
32 N[11] = 0.25 * (1.0 + r) * (1.0 + s) * (1.0 - t * t);
33 N[12] = 0.25 * (1.0 - r) * (1.0 + s) * (1.0 - t * t);
39 const double r = x[0];
40 const double s = x[1];
41 const double t = x[2];
43 dN[0] = 0.0625 * (1.0 - s) * (1.0 - t) *
44 (1.0 + 6.0 * r + s + 4.0 * r * s + t + 2.0 * r * t - s * t +
46 dN[1] = -0.0625 * (1.0 - s) * (1.0 - t) *
47 (1.0 - 6.0 * r + s - 4.0 * r * s + t - 2.0 * r * t - s * t -
49 dN[2] = -0.0625 * (1.0 + s) * (1.0 - t) *
50 (1.0 - 6.0 * r - s + 4.0 * r * s + t - 2.0 * r * t + s * t +
52 dN[3] = 0.0625 * (1.0 + s) * (1.0 - t) *
53 (1.0 + 6.0 * r - s - 4.0 * r * s + t + 2.0 * r * t + s * t -
56 dN[5] = -0.25 * r * (1.0 - s) * (1.0 - t) * (2.0 + s + s * t);
57 dN[6] = 0.125 * (1.0 - s * s) * (1.0 - t) * (1.0 - 2.0 * r - t - 2 * r * t);
58 dN[7] = -0.25 * r * (1.0 + s) * (1.0 - t) * (2.0 - s - s * t);
60 -0.125 * (1.0 - s * s) * (1.0 - t) * (1.0 + 2.0 * r - t + 2 * r * t);
61 dN[9] = -0.25 * (1.0 - s) * (1.0 - t * t);
62 dN[10] = 0.25 * (1.0 - s) * (1.0 - t * t);
63 dN[11] = 0.25 * (1.0 + s) * (1.0 - t * t);
64 dN[12] = -0.25 * (1.0 + s) * (1.0 - t * t);
67 dN[13] = 0.0625 * (1.0 - r) * (1.0 - t) *
68 (1.0 + r + 6.0 * s + 4.0 * r * s + t - r * t + 2.0 * s * t +
70 dN[14] = 0.0625 * (1.0 + r) * (1.0 - t) *
71 (1.0 - r + 6.0 * s - 4.0 * r * s + t + r * t + 2.0 * s * t -
73 dN[15] = -0.0625 * (1.0 + r) * (1.0 - t) *
74 (1.0 - r - 6.0 * s + 4.0 * r * s + t + r * t - 2.0 * s * t +
76 dN[16] = -0.0625 * (1.0 - r) * (1.0 - t) *
77 (1.0 + r - 6.0 * s - 4.0 * r * s + t - r * t - 2.0 * s * t -
81 -0.125 * (1.0 - r * r) * (1.0 - t) * (1.0 + 2.0 * s - t + 2.0 * s * t);
82 dN[19] = -0.25 * (1.0 + r) * s * (1.0 - t) * (2.0 - r - r * t);
84 0.125 * (1.0 - r * r) * (1.0 - t) * (1.0 - 2.0 * s - t - 2.0 * s * t);
85 dN[21] = -0.25 * (1.0 - r) * s * (1.0 - t) * (2.0 + r + r * t);
86 dN[22] = -0.25 * (1.0 - r) * (1.0 - t * t);
87 dN[23] = -0.25 * (1.0 + r) * (1.0 - t * t);
88 dN[24] = 0.25 * (1.0 + r) * (1.0 - t * t);
89 dN[25] = 0.25 * (1.0 - r) * (1.0 - t * t);
92 dN[26] = 0.125 * (1.0 - r) * (1.0 - s) *
93 (1.0 + r + s + 2.0 * t + r * t + s * t + 2.0 * r * s * t);
94 dN[27] = 0.125 * (1.0 + r) * (1.0 - s) *
95 (1.0 - r + s + 2.0 * t - r * t + s * t - 2.0 * r * s * t);
96 dN[28] = 0.125 * (1.0 + r) * (1.0 + s) *
97 (1.0 - r - s + 2.0 * t - r * t - s * t + 2.0 * r * s * t);
98 dN[29] = 0.125 * (1.0 - r) * (1.0 + s) *
99 (1.0 + r - s + 2.0 * t + r * t - s * t - 2.0 * r * s * t);
101 dN[31] = -0.25 * (1.0 - r * r) * (1.0 - s) * (1.0 + s * t);
102 dN[32] = -0.25 * (1.0 + r) * (1.0 - s * s) * (1.0 - r * t);
103 dN[33] = -0.25 * (1.0 - r * r) * (1.0 + s) * (1.0 - s * t);
104 dN[34] = -0.25 * (1.0 - r) * (1.0 - s * s) * (1.0 + r * t);
105 dN[35] = -0.5 * (1.0 - r) * (1.0 - s) * t;
106 dN[36] = -0.5 * (1.0 + r) * (1.0 - s) * t;
107 dN[37] = -0.5 * (1.0 + r) * (1.0 + s) * t;
108 dN[38] = -0.5 * (1.0 - r) * (1.0 + s) * t;