fftsvd/Integration.c at master · jbardhan/fftsvd · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
#include "FFTSVD.h"

unsigned int quadcount = 0;
unsigned int allcount = 0;

inline real Integration_single_XGB(Vector3D point, Panel panel, BEMKernelType kerneltype, void *parameters, BEMLayerType layertype) {

  Vector3D ultDest = Vector3D_allocate();
  Vector3D rvector_srcToQuad = Vector3D_allocate();
  Vector3D rvector_quadToDest = Vector3D_allocate();
  FlatPanel fp = (FlatPanel)panel->realpanel;
  Vector3D normal = fp->panelaxis[2];

  ultDest->x = ((real*)parameters)[0];
  ultDest->y = ((real*)parameters)[1];
  ultDest->z = ((real*)parameters)[2];

  Vector3D_sub(rvector_srcToQuad, point, panel->centroid);
  real r_srcQuad = Vector3D_length(rvector_srcToQuad);
  Vector3D_sub(rvector_quadToDest, ultDest, panel->centroid);
  real r_quadUlt = Vector3D_length(rvector_quadToDest);

  real g = -panel->area * Vector3D_dot(rvector_srcToQuad, normal) / (pow(r_srcQuad, 3.0) * r_quadUlt);

  Vector3D_free(rvector_quadToDest);
  Vector3D_free(rvector_srcToQuad);
  Vector3D_free(ultDest);

  return g;
}

real Integration(Vector3D point, Panel panel, BEMKernelType kerneltype, void* parameters, BEMLayerType layertype) {
   real slp = 0.0, dlp = 0.0;

   allcount++;

   //return Panel_quadrature(point, panel, kerneltype, parameters, layertype);

/* 	if ((panel->type == FLAT_PANEL) && (kerneltype == XGB_KERNEL)) { */
/* 	  real dist = Vector3D_distance(panel->centroid, point); */
/* 	  if (dist > 10.0 * panel->maxedgelength) */
/* 		 return Integration_single_XGB(point, panel, kerneltype, parameters, layertype); */
/* 	} */

   if ((panel->type == GST_PANEL) || (panel->type == TOR_PANEL)) {
      real dist = Vector3D_distance(panel->centroid, point);
      if ((layertype == SINGLE_LAYER_INT) && (dist > 4.0 * panel->maxedgelength)) {
        quadcount++;
        return Panel_quadrature(point, panel, kerneltype, parameters, layertype);
      }
      else if ((layertype == DOUBLE_LAYER_INT) && (dist > 2.0 * panel->maxedgelength)) {
        quadcount++;
        return Panel_quadrature(point, panel, kerneltype, parameters, layertype);
      }
   }

   switch (panel->type) {
   case FLAT_PANEL: {
      switch (kerneltype) {
      case CONSTANT_KERNEL: slp = panel->area; break;
      case POISSON_KERNEL: FlatIntegration_oneoverr(point, (FlatPanel)(panel->realpanel), parameters, &slp, &dlp); break;
      case HELMHOLTZ_KERNEL: FlatIntegration_ekroverr_numerical(point, (FlatPanel)(panel->realpanel), parameters, &slp, &dlp); break;
      //case HELMHOLTZ_KERNEL: FlatIntegration_ekroverr_desingularized(point, (FlatPanel)(panel->realpanel), parameters, &slp, &dlp); break;
      /* These kernels are not singular, or singular but always
         evaluated far from the panel.  Always use quadrature */
      case LJ_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case LJ12_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case LJ6_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case MONOMIAL_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case INVERSEPOWER_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case GHOSH_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case GRYCUK_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
      case LESYNG_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel), kerneltype, parameters, layertype);
		case XGB_KERNEL: return FlatIntegration_maltquad(point, (FlatPanel)(panel->realpanel),
																		 kerneltype, parameters, layertype);

      }
      break;
   }
   case GST_PANEL: {
      switch (kerneltype) {
      case CONSTANT_KERNEL: Integration_general_GST_single(point, (GST)(panel->realpanel), CONSTANT_KERNEL, parameters, &slp); break;
      case X_KERNEL: Integration_general_GST_single(point, (GST)(panel->realpanel), X_KERNEL, parameters, &slp); break;
      case Y_KERNEL: Integration_general_GST_single(point, (GST)(panel->realpanel), Y_KERNEL, parameters, &slp); break;
      case Z_KERNEL: Integration_general_GST_single(point, (GST)(panel->realpanel), Z_KERNEL, parameters, &slp); break;
      case LJ12_KERNEL: Integration_general_GST_double(point, (GST)(panel->realpanel), LJ12_KERNEL, parameters, &dlp); break;
      case LJ6_KERNEL: Integration_general_GST_double(point, (GST)(panel->realpanel), LJ6_KERNEL, parameters, &dlp); break;
         //      case BCA_KERNEL: Integration_general_GST_double(point, (GST)(panel->realpanel), BCA_KERNEL, parameters, &dlp); break;
      case GRYCUK_KERNEL: dlp = Panel_quadrature(point, panel, LJ6_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case LESYNG_KERNEL: dlp = Panel_quadrature(point, panel, LESYNG_KERNEL, parameters, DOUBLE_LAYER_INT); break;
         //      case GHOSH_KERNEL: Integration_general_GST_double(point, (GST)(panel->realpanel), GHOSH_KERNEL, parameters, &dlp); break;
      case GHOSH_KERNEL: dlp = Panel_quadrature(point, panel, GHOSH_KERNEL, parameters, DOUBLE_LAYER_INT); break;
		case XGB_KERNEL: dlp = Panel_quadrature(point, panel, XGB_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case MONOMIAL_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_general_GST_single(point, (GST)(panel->realpanel), MONOMIAL_KERNEL, parameters, &slp); break;
            case DOUBLE_LAYER_INT: Integration_general_GST_double(point, (GST)(panel->realpanel), MONOMIAL_KERNEL, parameters, &dlp); break;
         }
         break;
      }
      case INVERSEPOWER_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_general_GST_single(point, (GST)(panel->realpanel), INVERSEPOWER_KERNEL, parameters, &slp); break;
            case DOUBLE_LAYER_INT: Integration_general_GST_double(point, (GST)(panel->realpanel), INVERSEPOWER_KERNEL, parameters, &dlp); break;
         }
         break;
      }
      case POISSON_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_oneoverr_GST_single(point, (GST)(panel->realpanel), parameters, &slp); break;
            case DOUBLE_LAYER_INT: Integration_oneoverr_GST_double(point, (GST)(panel->realpanel), parameters, &dlp); break;
         }
         break;
      }
      case HELMHOLTZ_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_oneoverr_GST_single(point, (GST)(panel->realpanel), parameters, &slp);
                                   slp += Panel_quadrature(point, panel, DESINGULARIZED_HELMHOLTZ_KERNEL, parameters, SINGLE_LAYER_INT);
                                   break;
            case DOUBLE_LAYER_INT: Integration_oneoverr_GST_double(point, (GST)(panel->realpanel), parameters, &dlp);
                                   dlp += Panel_quadrature(point, panel, DESINGULARIZED_HELMHOLTZ_KERNEL, parameters, DOUBLE_LAYER_INT);
                                   break;
         }
         break;
      }
      }
      break;
   }
   case TOR_PANEL: {
      switch (kerneltype) {
      case CONSTANT_KERNEL: Integration_general_TOR_single(point, (TOR)(panel->realpanel), CONSTANT_KERNEL, parameters, &slp); break;
      case X_KERNEL: Integration_general_TOR_single(point, (TOR)(panel->realpanel), X_KERNEL, parameters, &slp); break;
      case Y_KERNEL: Integration_general_TOR_single(point, (TOR)(panel->realpanel), Y_KERNEL, parameters, &slp); break;
      case Z_KERNEL: Integration_general_TOR_single(point, (TOR)(panel->realpanel), Z_KERNEL, parameters, &slp); break;
      case LESYNG_KERNEL: dlp = Panel_quadrature(point, panel, LESYNG_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case LJ6_KERNEL: dlp = Panel_quadrature(point, panel, LJ6_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case GRYCUK_KERNEL: dlp = Panel_quadrature(point, panel, LJ6_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case GHOSH_KERNEL: dlp = Panel_quadrature(point, panel, GHOSH_KERNEL, parameters, DOUBLE_LAYER_INT); break;
		case XGB_KERNEL: dlp = Panel_quadrature(point, panel, XGB_KERNEL, parameters, DOUBLE_LAYER_INT); break;
      case MONOMIAL_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_general_TOR_single(point, (TOR)(panel->realpanel), MONOMIAL_KERNEL, parameters, &slp); break;
            //case DOUBLE_LAYER_INT: Integration_general_TOR_double(point, (TOR)(panel->realpanel), MONOMIAL_KERNEL, parameters, &dlp); break;
         }
         break;
      }
      case INVERSEPOWER_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_general_TOR_single(point, (TOR)(panel->realpanel), INVERSEPOWER_KERNEL, parameters, &slp); break;
            //case DOUBLE_LAYER_INT: Integration_general_TOR_double(point, (TOR)(panel->realpanel), INVERSEPOWER_KERNEL, parameters, &dlp); break;
         }
         break;
      }
      case POISSON_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_oneoverr_TOR_single(point, (TOR)(panel->realpanel), parameters, &slp); break;
            case DOUBLE_LAYER_INT: Integration_oneoverr_TOR_double(point, (TOR)(panel->realpanel), parameters, &dlp); break;
         }
         break;
      }
      case HELMHOLTZ_KERNEL: {
         switch (layertype) {
            case SINGLE_LAYER_INT: Integration_oneoverr_TOR_single(point, (TOR)(panel->realpanel), parameters, &slp);
                                   slp += Panel_quadrature(point, panel, DESINGULARIZED_HELMHOLTZ_KERNEL, parameters, SINGLE_LAYER_INT);
                                   break;
            case DOUBLE_LAYER_INT: Integration_oneoverr_TOR_double(point, (TOR)(panel->realpanel), parameters, &dlp);
                                   dlp += Panel_quadrature(point, panel, DESINGULARIZED_HELMHOLTZ_KERNEL, parameters, DOUBLE_LAYER_INT);
                                   break;
         }
         break;
      }
      }
      break;
   }
   case POINT_PANEL: {
      slp = GreensFunction(point, panel->centroid, kerneltype, parameters); break;
   }
   }

   switch (layertype) {
      case SINGLE_LAYER_INT: return slp;
      case DOUBLE_LAYER_INT: return dlp;
      default: return 0.0;
   }
}