[5999] | 1 | #include "Python.h" |
---|
| 2 | #include "Numeric/arrayobject.h" |
---|
| 3 | #include "math.h" |
---|
| 4 | #include <stdio.h> |
---|
| 5 | const double pi = 3.14159265358979; |
---|
| 6 | |
---|
| 7 | |
---|
| 8 | // Shared code snippets |
---|
| 9 | #include "util_ext.h" |
---|
| 10 | |
---|
| 11 | |
---|
| 12 | /* double max(double a, double b) { */ |
---|
| 13 | /* double z; */ |
---|
| 14 | /* z=(a>b)?a:b; */ |
---|
| 15 | /* return z;} */ |
---|
| 16 | |
---|
| 17 | /* double min(double a, double b) { */ |
---|
| 18 | /* double z; */ |
---|
| 19 | /* z=(a<b)?a:b; */ |
---|
| 20 | /* return z;} */ |
---|
| 21 | |
---|
| 22 | |
---|
| 23 | // Function to obtain speed from momentum and depth. |
---|
| 24 | // This is used by flux functions |
---|
| 25 | // Input parameters uh and h may be modified by this function. |
---|
| 26 | double _compute_speed(double *uh, |
---|
| 27 | double *h, |
---|
| 28 | double epsilon, |
---|
| 29 | double h0) { |
---|
| 30 | |
---|
| 31 | double u; |
---|
| 32 | |
---|
| 33 | if (*h < epsilon) { |
---|
| 34 | *h = 0.0; //Could have been negative |
---|
| 35 | u = 0.0; |
---|
| 36 | } else { |
---|
| 37 | u = *uh/(*h + h0/ *h); |
---|
| 38 | } |
---|
| 39 | |
---|
| 40 | |
---|
| 41 | // Adjust momentum to be consistent with speed |
---|
| 42 | *uh = u * *h; |
---|
| 43 | |
---|
| 44 | return u; |
---|
| 45 | } |
---|
| 46 | |
---|
| 47 | //------------------------------------------------------------- |
---|
| 48 | // New vel based code |
---|
| 49 | //------------------------------------------------------------- |
---|
| 50 | //Innermost flux function (using w=z+h) |
---|
| 51 | int _flux_function_vel(double *q_left, double *q_right, |
---|
| 52 | double normals, double g, double epsilon, double h0, |
---|
| 53 | double *edgeflux, double *max_speed) { |
---|
| 54 | |
---|
| 55 | int i; |
---|
| 56 | double flux_left[2], flux_right[2]; |
---|
| 57 | double w_left, h_left, uh_left, z_left, u_left, soundspeed_left; |
---|
| 58 | double w_right, h_right, uh_right, z_right, u_right, soundspeed_right; |
---|
| 59 | double z, s_max, s_min, denom; |
---|
| 60 | |
---|
| 61 | |
---|
| 62 | w_left = q_left[0]; |
---|
| 63 | uh_left = q_left[1]*normals; |
---|
| 64 | z_left = q_left[2]; |
---|
| 65 | h_left = q_left[3]; |
---|
| 66 | u_left = q_left[4]*normals; |
---|
| 67 | |
---|
| 68 | /* printf("w_left = %f \n",w_left); */ |
---|
| 69 | /* printf("uh_left = %f \n",uh_left); */ |
---|
| 70 | /* printf("z_left = %f \n",z_left); */ |
---|
| 71 | /* printf("h_left = %f \n",h_left); */ |
---|
| 72 | /* printf("u_left = %f \n",u_left); */ |
---|
| 73 | |
---|
| 74 | w_right = q_right[0]; |
---|
| 75 | uh_right = q_right[1]*normals; |
---|
| 76 | z_right = q_right[2]; |
---|
| 77 | h_right = q_right[3]; |
---|
| 78 | u_right = q_right[4]*normals; |
---|
| 79 | |
---|
| 80 | z = (z_left+z_right)/2.0; |
---|
| 81 | |
---|
| 82 | soundspeed_left = sqrt(g*h_left); |
---|
| 83 | soundspeed_right = sqrt(g*h_right); |
---|
| 84 | |
---|
| 85 | s_max = max(u_left+soundspeed_left, u_right+soundspeed_right); |
---|
| 86 | if (s_max < 0.0) s_max = 0.0; |
---|
| 87 | |
---|
| 88 | s_min = min(u_left-soundspeed_left, u_right-soundspeed_right); |
---|
| 89 | if (s_min > 0.0) s_min = 0.0; |
---|
| 90 | |
---|
| 91 | |
---|
| 92 | // Flux formulas |
---|
| 93 | flux_left[0] = u_left*h_left; |
---|
| 94 | flux_left[1] = u_left*u_left*h_left + 0.5*g*h_left*h_left; |
---|
| 95 | |
---|
| 96 | flux_right[0] = u_right*h_right; |
---|
| 97 | flux_right[1] = u_right*u_right*h_right + 0.5*g*h_right*h_right; |
---|
| 98 | |
---|
| 99 | // Flux computation |
---|
| 100 | denom = s_max-s_min; |
---|
| 101 | if (denom < epsilon) { |
---|
| 102 | for (i=0; i<2; i++) edgeflux[i] = 0.0; |
---|
| 103 | *max_speed = 0.0; |
---|
| 104 | } else { |
---|
| 105 | edgeflux[0] = s_max*flux_left[0] - s_min*flux_right[0]; |
---|
| 106 | edgeflux[0] += s_max*s_min*(w_right-w_left); |
---|
| 107 | edgeflux[0] /= denom; |
---|
| 108 | edgeflux[1] = s_max*flux_left[1] - s_min*flux_right[1]; |
---|
| 109 | edgeflux[1] += s_max*s_min*(uh_right-uh_left); |
---|
| 110 | edgeflux[1] /= denom; |
---|
| 111 | edgeflux[1] *= normals; |
---|
| 112 | |
---|
| 113 | // Maximal wavespeed |
---|
| 114 | *max_speed = max(fabs(s_max), fabs(s_min)); |
---|
| 115 | } |
---|
| 116 | return 0; |
---|
| 117 | } |
---|
| 118 | |
---|
| 119 | // Computational function for flux computation |
---|
| 120 | double _compute_fluxes_vel_ext(double cfl, |
---|
| 121 | double timestep, |
---|
| 122 | double epsilon, |
---|
| 123 | double g, |
---|
| 124 | double h0, |
---|
| 125 | long* neighbours, |
---|
| 126 | long* neighbour_vertices, |
---|
| 127 | double* normals, |
---|
| 128 | double* areas, |
---|
| 129 | double* stage_edge_values, |
---|
| 130 | double* xmom_edge_values, |
---|
| 131 | double* bed_edge_values, |
---|
| 132 | double* height_edge_values, |
---|
| 133 | double* velocity_edge_values, |
---|
| 134 | double* stage_boundary_values, |
---|
| 135 | double* xmom_boundary_values, |
---|
| 136 | double* bed_boundary_values, |
---|
| 137 | double* height_boundary_values, |
---|
| 138 | double* velocity_boundary_values, |
---|
| 139 | double* stage_explicit_update, |
---|
| 140 | double* xmom_explicit_update, |
---|
| 141 | int number_of_elements, |
---|
| 142 | double* max_speed_array) { |
---|
| 143 | |
---|
| 144 | double flux[2], ql[5], qr[5], edgeflux[2]; |
---|
| 145 | double max_speed, normal; |
---|
| 146 | int k, i, ki, n, m, nm=0; |
---|
[6042] | 147 | |
---|
| 148 | //printf("Inside _comp\n"); |
---|
[5999] | 149 | |
---|
| 150 | for (k=0; k<number_of_elements; k++) { |
---|
| 151 | flux[0] = 0.0; |
---|
| 152 | flux[1] = 0.0; |
---|
[6042] | 153 | //printf("k = %d\n",k); |
---|
| 154 | |
---|
[5999] | 155 | for (i=0; i<2; i++) { |
---|
| 156 | ki = k*2+i; |
---|
| 157 | |
---|
| 158 | ql[0] = stage_edge_values[ki]; |
---|
| 159 | ql[1] = xmom_edge_values[ki]; |
---|
| 160 | ql[2] = bed_edge_values[ki]; |
---|
| 161 | ql[3] = height_edge_values[ki]; |
---|
| 162 | ql[4] = velocity_edge_values[ki]; |
---|
| 163 | |
---|
| 164 | n = neighbours[ki]; |
---|
| 165 | if (n<0) { |
---|
| 166 | m = -n-1; |
---|
| 167 | qr[0] = stage_boundary_values[m]; |
---|
| 168 | qr[1] = xmom_boundary_values[m]; |
---|
| 169 | qr[2] = bed_boundary_values[m]; |
---|
| 170 | qr[3] = height_boundary_values[m]; |
---|
| 171 | qr[4] = velocity_boundary_values[m]; |
---|
| 172 | } else { |
---|
| 173 | m = neighbour_vertices[ki]; |
---|
| 174 | nm = n*2+m; |
---|
| 175 | qr[0] = stage_edge_values[nm]; |
---|
| 176 | qr[1] = xmom_edge_values[nm]; |
---|
| 177 | qr[2] = bed_edge_values[nm]; |
---|
| 178 | qr[3] = height_edge_values[nm]; |
---|
| 179 | qr[4] = velocity_edge_values[nm]; |
---|
| 180 | } |
---|
| 181 | |
---|
| 182 | normal = normals[ki]; |
---|
| 183 | _flux_function_vel(ql, qr, normal, g, epsilon, h0, edgeflux, &max_speed); |
---|
| 184 | flux[0] -= edgeflux[0]; |
---|
| 185 | flux[1] -= edgeflux[1]; |
---|
| 186 | |
---|
| 187 | // Update timestep based on edge i and possibly neighbour n |
---|
| 188 | if (max_speed > epsilon) { |
---|
| 189 | // Original CFL calculation |
---|
| 190 | |
---|
| 191 | timestep = min(timestep, 0.5*cfl*areas[k]/max_speed); |
---|
| 192 | if (n>=0) { |
---|
| 193 | timestep = min(timestep, 0.5*cfl*areas[n]/max_speed); |
---|
| 194 | } |
---|
| 195 | } |
---|
| 196 | } // End edge i (and neighbour n) |
---|
| 197 | flux[0] /= areas[k]; |
---|
| 198 | stage_explicit_update[k] = flux[0]; |
---|
| 199 | flux[1] /= areas[k]; |
---|
| 200 | xmom_explicit_update[k] = flux[1]; |
---|
| 201 | |
---|
| 202 | //Keep track of maximal speeds |
---|
| 203 | max_speed_array[k]=max_speed; |
---|
| 204 | } |
---|
| 205 | return timestep; |
---|
| 206 | } |
---|
| 207 | |
---|
| 208 | //------------------------------------------------------------- |
---|
| 209 | // Old code |
---|
| 210 | //------------------------------------------------------------ |
---|
| 211 | //Innermost flux function (using w=z+h) |
---|
| 212 | int _flux_function(double *q_left, double *q_right, |
---|
| 213 | double z_left, double z_right, |
---|
| 214 | double normals, double g, double epsilon, double h0, |
---|
| 215 | double *edgeflux, double *max_speed) { |
---|
| 216 | |
---|
| 217 | int i; |
---|
| 218 | double ql[2], qr[2], flux_left[2], flux_right[2]; |
---|
| 219 | double z, w_left, h_left, uh_left, soundspeed_left, u_left; |
---|
| 220 | double w_right, h_right, uh_right, soundspeed_right, u_right; |
---|
| 221 | double s_max, s_min, denom; |
---|
| 222 | |
---|
| 223 | //printf("h0 = %f \n",h0); |
---|
| 224 | ql[0] = q_left[0]; |
---|
| 225 | ql[1] = q_left[1]; |
---|
| 226 | ql[1] = ql[1]*normals; |
---|
| 227 | |
---|
| 228 | qr[0] = q_right[0]; |
---|
| 229 | qr[1] = q_right[1]; |
---|
| 230 | qr[1] = qr[1]*normals; |
---|
| 231 | |
---|
| 232 | z = (z_left+z_right)/2.0; |
---|
| 233 | |
---|
| 234 | //w_left = ql[0]; |
---|
| 235 | //h_left = w_left-z; |
---|
| 236 | //uh_left = ql[1]; |
---|
| 237 | |
---|
| 238 | |
---|
| 239 | |
---|
| 240 | // Compute speeds in x-direction |
---|
| 241 | w_left = ql[0]; |
---|
| 242 | h_left = w_left-z; |
---|
| 243 | uh_left = ql[1]; |
---|
| 244 | |
---|
| 245 | u_left = _compute_speed(&uh_left, &h_left, epsilon, h0); |
---|
| 246 | |
---|
| 247 | w_right = qr[0]; |
---|
| 248 | h_right = w_right-z; |
---|
| 249 | uh_right = qr[1]; |
---|
| 250 | |
---|
| 251 | u_right = _compute_speed(&uh_right, &h_right, epsilon, h0); |
---|
| 252 | |
---|
| 253 | soundspeed_left = sqrt(g*h_left); |
---|
| 254 | soundspeed_right = sqrt(g*h_right); |
---|
| 255 | |
---|
| 256 | s_max = max(u_left+soundspeed_left, u_right+soundspeed_right); |
---|
| 257 | if (s_max < 0.0) s_max = 0.0; |
---|
| 258 | |
---|
| 259 | s_min = min(u_left-soundspeed_left, u_right-soundspeed_right); |
---|
| 260 | if (s_min > 0.0) s_min = 0.0; |
---|
| 261 | |
---|
| 262 | |
---|
| 263 | // Flux formulas |
---|
| 264 | flux_left[0] = u_left*h_left; |
---|
| 265 | flux_left[1] = u_left*uh_left + 0.5*g*h_left*h_left; |
---|
| 266 | |
---|
| 267 | flux_right[0] = u_right*h_right; |
---|
| 268 | flux_right[1] = u_right*uh_right + 0.5*g*h_right*h_right; |
---|
| 269 | |
---|
| 270 | // Flux computation |
---|
| 271 | denom = s_max-s_min; |
---|
| 272 | if (denom < epsilon) { |
---|
| 273 | for (i=0; i<2; i++) edgeflux[i] = 0.0; |
---|
| 274 | *max_speed = 0.0; |
---|
| 275 | } else { |
---|
| 276 | edgeflux[0] = s_max*flux_left[0] - s_min*flux_right[0]; |
---|
| 277 | edgeflux[0] += s_max*s_min*(qr[0]-ql[0]); |
---|
| 278 | edgeflux[0] /= denom; |
---|
| 279 | edgeflux[1] = s_max*flux_left[1] - s_min*flux_right[1]; |
---|
| 280 | edgeflux[1] += s_max*s_min*(qr[1]-ql[1]); |
---|
| 281 | edgeflux[1] /= denom; |
---|
| 282 | edgeflux[1] *= normals; |
---|
| 283 | |
---|
| 284 | // Maximal wavespeed |
---|
| 285 | *max_speed = max(fabs(s_max), fabs(s_min)); |
---|
| 286 | } |
---|
| 287 | return 0; |
---|
| 288 | } |
---|
| 289 | |
---|
| 290 | |
---|
| 291 | |
---|
| 292 | |
---|
| 293 | // Computational function for flux computation |
---|
| 294 | double _compute_fluxes_ext( |
---|
| 295 | double cfl, |
---|
| 296 | double timestep, |
---|
| 297 | double epsilon, |
---|
| 298 | double g, |
---|
| 299 | double h0, |
---|
| 300 | long* neighbours, |
---|
| 301 | long* neighbour_vertices, |
---|
| 302 | double* normals, |
---|
| 303 | double* areas, |
---|
| 304 | double* stage_edge_values, |
---|
| 305 | double* xmom_edge_values, |
---|
| 306 | double* bed_edge_values, |
---|
| 307 | double* stage_boundary_values, |
---|
| 308 | double* xmom_boundary_values, |
---|
| 309 | double* stage_explicit_update, |
---|
| 310 | double* xmom_explicit_update, |
---|
| 311 | int number_of_elements, |
---|
| 312 | double* max_speed_array) { |
---|
| 313 | |
---|
| 314 | double flux[2], ql[2], qr[2], edgeflux[2]; |
---|
| 315 | double zl, zr, max_speed, normal; |
---|
| 316 | int k, i, ki, n, m, nm=0; |
---|
| 317 | |
---|
| 318 | |
---|
| 319 | for (k=0; k<number_of_elements; k++) { |
---|
| 320 | flux[0] = 0.0; |
---|
| 321 | flux[1] = 0.0; |
---|
| 322 | |
---|
| 323 | for (i=0; i<2; i++) { |
---|
| 324 | ki = k*2+i; |
---|
| 325 | |
---|
| 326 | ql[0] = stage_edge_values[ki]; |
---|
| 327 | ql[1] = xmom_edge_values[ki]; |
---|
| 328 | zl = bed_edge_values[ki]; |
---|
| 329 | |
---|
| 330 | n = neighbours[ki]; |
---|
| 331 | if (n<0) { |
---|
| 332 | m = -n-1; |
---|
| 333 | qr[0] = stage_boundary_values[m]; |
---|
| 334 | qr[1] = xmom_boundary_values[m]; |
---|
| 335 | zr = zl; |
---|
| 336 | } else { |
---|
| 337 | m = neighbour_vertices[ki]; |
---|
| 338 | nm = n*2+m; |
---|
| 339 | qr[0] = stage_edge_values[nm]; |
---|
| 340 | qr[1] = xmom_edge_values[nm]; |
---|
| 341 | zr = bed_edge_values[nm]; |
---|
| 342 | } |
---|
| 343 | |
---|
| 344 | normal = normals[ki]; |
---|
| 345 | _flux_function(ql, qr, zl, zr, normal, g, epsilon, h0, edgeflux, &max_speed); |
---|
| 346 | flux[0] -= edgeflux[0]; |
---|
| 347 | flux[1] -= edgeflux[1]; |
---|
| 348 | |
---|
| 349 | // Update timestep based on edge i and possibly neighbour n |
---|
| 350 | if (max_speed > epsilon) { |
---|
| 351 | // Original CFL calculation |
---|
| 352 | |
---|
| 353 | timestep = min(timestep, 0.5*cfl*areas[k]/max_speed); |
---|
| 354 | if (n>=0) { |
---|
| 355 | timestep = min(timestep, 0.5*cfl*areas[n]/max_speed); |
---|
| 356 | } |
---|
| 357 | } |
---|
| 358 | } // End edge i (and neighbour n) |
---|
| 359 | flux[0] /= areas[k]; |
---|
| 360 | stage_explicit_update[k] = flux[0]; |
---|
| 361 | flux[1] /= areas[k]; |
---|
| 362 | xmom_explicit_update[k] = flux[1]; |
---|
| 363 | |
---|
| 364 | //Keep track of maximal speeds |
---|
| 365 | max_speed_array[k]=max_speed; |
---|
| 366 | } |
---|
| 367 | return timestep; |
---|
| 368 | } |
---|
| 369 | |
---|
| 370 | //========================================================================= |
---|
| 371 | // Python Glue |
---|
| 372 | //========================================================================= |
---|
| 373 | PyObject *compute_fluxes_ext(PyObject *self, PyObject *args) { |
---|
| 374 | |
---|
| 375 | PyObject |
---|
| 376 | *domain, |
---|
| 377 | *stage, |
---|
| 378 | *xmom, |
---|
| 379 | *bed; |
---|
| 380 | |
---|
| 381 | PyArrayObject |
---|
| 382 | *neighbours, |
---|
| 383 | *neighbour_vertices, |
---|
| 384 | *normals, |
---|
| 385 | *areas, |
---|
| 386 | *stage_vertex_values, |
---|
| 387 | *xmom_vertex_values, |
---|
| 388 | *bed_vertex_values, |
---|
| 389 | *stage_boundary_values, |
---|
| 390 | *xmom_boundary_values, |
---|
| 391 | *stage_explicit_update, |
---|
| 392 | *xmom_explicit_update, |
---|
| 393 | *max_speed_array; |
---|
| 394 | |
---|
| 395 | double timestep, epsilon, g, h0, cfl; |
---|
| 396 | int number_of_elements; |
---|
| 397 | |
---|
| 398 | |
---|
| 399 | // Convert Python arguments to C |
---|
| 400 | if (!PyArg_ParseTuple(args, "dOOOO", |
---|
| 401 | ×tep, |
---|
| 402 | &domain, |
---|
| 403 | &stage, |
---|
| 404 | &xmom, |
---|
| 405 | &bed)) { |
---|
| 406 | PyErr_SetString(PyExc_RuntimeError, "comp_flux_vel_ext.c: compute_fluxes_ext could not parse input"); |
---|
| 407 | return NULL; |
---|
| 408 | } |
---|
| 409 | |
---|
| 410 | |
---|
| 411 | epsilon = get_python_double(domain,"epsilon"); |
---|
| 412 | g = get_python_double(domain,"g"); |
---|
| 413 | h0 = get_python_double(domain,"h0"); |
---|
| 414 | cfl = get_python_double(domain,"CFL"); |
---|
| 415 | |
---|
| 416 | |
---|
| 417 | neighbours = get_consecutive_array(domain, "neighbours"); |
---|
| 418 | neighbour_vertices= get_consecutive_array(domain, "neighbour_vertices"); |
---|
| 419 | normals = get_consecutive_array(domain, "normals"); |
---|
| 420 | areas = get_consecutive_array(domain, "areas"); |
---|
| 421 | max_speed_array = get_consecutive_array(domain, "max_speed_array"); |
---|
| 422 | |
---|
| 423 | stage_vertex_values = get_consecutive_array(stage, "vertex_values"); |
---|
| 424 | xmom_vertex_values = get_consecutive_array(xmom, "vertex_values"); |
---|
| 425 | bed_vertex_values = get_consecutive_array(bed, "vertex_values"); |
---|
| 426 | |
---|
| 427 | stage_boundary_values = get_consecutive_array(stage, "boundary_values"); |
---|
| 428 | xmom_boundary_values = get_consecutive_array(xmom, "boundary_values"); |
---|
| 429 | |
---|
| 430 | |
---|
| 431 | stage_explicit_update = get_consecutive_array(stage, "explicit_update"); |
---|
| 432 | xmom_explicit_update = get_consecutive_array(xmom, "explicit_update"); |
---|
| 433 | |
---|
| 434 | |
---|
| 435 | |
---|
| 436 | number_of_elements = stage_vertex_values -> dimensions[0]; |
---|
| 437 | |
---|
| 438 | |
---|
| 439 | |
---|
| 440 | // Call underlying flux computation routine and update |
---|
| 441 | // the explicit update arrays |
---|
| 442 | timestep = _compute_fluxes_ext( |
---|
| 443 | cfl, |
---|
| 444 | timestep, |
---|
| 445 | epsilon, |
---|
| 446 | g, |
---|
| 447 | h0, |
---|
| 448 | (long*) neighbours -> data, |
---|
| 449 | (long*) neighbour_vertices -> data, |
---|
| 450 | (double*) normals -> data, |
---|
| 451 | (double*) areas -> data, |
---|
| 452 | (double*) stage_vertex_values -> data, |
---|
| 453 | (double*) xmom_vertex_values -> data, |
---|
| 454 | (double*) bed_vertex_values -> data, |
---|
| 455 | (double*) stage_boundary_values -> data, |
---|
| 456 | (double*) xmom_boundary_values -> data, |
---|
| 457 | (double*) stage_explicit_update -> data, |
---|
| 458 | (double*) xmom_explicit_update -> data, |
---|
| 459 | number_of_elements, |
---|
| 460 | (double*) max_speed_array -> data); |
---|
| 461 | |
---|
| 462 | |
---|
| 463 | Py_DECREF(neighbours); |
---|
| 464 | Py_DECREF(neighbour_vertices); |
---|
| 465 | Py_DECREF(normals); |
---|
| 466 | Py_DECREF(areas); |
---|
| 467 | Py_DECREF(stage_vertex_values); |
---|
| 468 | Py_DECREF(xmom_vertex_values); |
---|
| 469 | Py_DECREF(bed_vertex_values); |
---|
| 470 | Py_DECREF(stage_boundary_values); |
---|
| 471 | Py_DECREF(xmom_boundary_values); |
---|
| 472 | Py_DECREF(stage_explicit_update); |
---|
| 473 | Py_DECREF(xmom_explicit_update); |
---|
| 474 | Py_DECREF(max_speed_array); |
---|
| 475 | |
---|
| 476 | |
---|
| 477 | |
---|
| 478 | |
---|
| 479 | // Return updated flux timestep |
---|
| 480 | return Py_BuildValue("d", timestep); |
---|
| 481 | } |
---|
| 482 | |
---|
| 483 | |
---|
| 484 | //------------------------------------------------ |
---|
| 485 | // New velocity based compute fluxes |
---|
| 486 | //------------------------------------------------ |
---|
| 487 | PyObject *compute_fluxes_vel_ext(PyObject *self, PyObject *args) { |
---|
| 488 | |
---|
| 489 | PyObject |
---|
| 490 | *domain, |
---|
| 491 | *stage, |
---|
| 492 | *xmom, |
---|
| 493 | *bed, |
---|
| 494 | *height, |
---|
| 495 | *velocity; |
---|
| 496 | |
---|
| 497 | PyArrayObject |
---|
| 498 | *neighbours, |
---|
| 499 | *neighbour_vertices, |
---|
| 500 | *normals, |
---|
| 501 | *areas, |
---|
| 502 | *stage_vertex_values, |
---|
| 503 | *xmom_vertex_values, |
---|
| 504 | *bed_vertex_values, |
---|
| 505 | *height_vertex_values, |
---|
| 506 | *velocity_vertex_values, |
---|
| 507 | *stage_boundary_values, |
---|
| 508 | *xmom_boundary_values, |
---|
| 509 | *bed_boundary_values, |
---|
| 510 | *height_boundary_values, |
---|
| 511 | *velocity_boundary_values, |
---|
| 512 | *stage_explicit_update, |
---|
| 513 | *xmom_explicit_update, |
---|
| 514 | *max_speed_array; |
---|
| 515 | |
---|
| 516 | double timestep, epsilon, g, h0, cfl; |
---|
| 517 | int number_of_elements; |
---|
| 518 | |
---|
| 519 | |
---|
| 520 | // Convert Python arguments to C |
---|
| 521 | if (!PyArg_ParseTuple(args, "dOOOOOO", |
---|
| 522 | ×tep, |
---|
| 523 | &domain, |
---|
| 524 | &stage, |
---|
| 525 | &xmom, |
---|
| 526 | &bed, |
---|
| 527 | &height, |
---|
| 528 | &velocity)) { |
---|
| 529 | PyErr_SetString(PyExc_RuntimeError, "comp_flux_vel_ext.c: compute_fluxes_vel_ext could not parse input"); |
---|
[6042] | 530 | printf("comp_flux_vel_ext.c: compute_fluxes_vel_ext could not parse input"); |
---|
[5999] | 531 | return NULL; |
---|
| 532 | } |
---|
| 533 | |
---|
| 534 | |
---|
| 535 | epsilon = get_python_double(domain,"epsilon"); |
---|
| 536 | g = get_python_double(domain,"g"); |
---|
| 537 | h0 = get_python_double(domain,"h0"); |
---|
| 538 | cfl = get_python_double(domain,"CFL"); |
---|
| 539 | |
---|
| 540 | |
---|
| 541 | neighbours = get_consecutive_array(domain, "neighbours"); |
---|
| 542 | neighbour_vertices= get_consecutive_array(domain, "neighbour_vertices"); |
---|
| 543 | normals = get_consecutive_array(domain, "normals"); |
---|
| 544 | areas = get_consecutive_array(domain, "areas"); |
---|
| 545 | max_speed_array = get_consecutive_array(domain, "max_speed_array"); |
---|
| 546 | |
---|
| 547 | stage_vertex_values = get_consecutive_array(stage, "vertex_values"); |
---|
| 548 | xmom_vertex_values = get_consecutive_array(xmom, "vertex_values"); |
---|
| 549 | bed_vertex_values = get_consecutive_array(bed, "vertex_values"); |
---|
| 550 | height_vertex_values = get_consecutive_array(height, "vertex_values"); |
---|
| 551 | velocity_vertex_values = get_consecutive_array(velocity, "vertex_values"); |
---|
| 552 | |
---|
| 553 | stage_boundary_values = get_consecutive_array(stage, "boundary_values"); |
---|
| 554 | xmom_boundary_values = get_consecutive_array(xmom, "boundary_values"); |
---|
| 555 | bed_boundary_values = get_consecutive_array(bed, "boundary_values"); |
---|
| 556 | height_boundary_values = get_consecutive_array(height, "boundary_values"); |
---|
| 557 | velocity_boundary_values = get_consecutive_array(velocity, "boundary_values"); |
---|
| 558 | |
---|
| 559 | |
---|
| 560 | stage_explicit_update = get_consecutive_array(stage, "explicit_update"); |
---|
| 561 | xmom_explicit_update = get_consecutive_array(xmom, "explicit_update"); |
---|
| 562 | |
---|
| 563 | number_of_elements = stage_vertex_values -> dimensions[0]; |
---|
| 564 | |
---|
[6042] | 565 | |
---|
| 566 | //printf("comp_flux_vel 1 N = %d %15.5e %15.5e %15.5e %15.5e %15.5e \n",number_of_elements,cfl,timestep,epsilon,g,h0); |
---|
| 567 | |
---|
| 568 | |
---|
| 569 | |
---|
[5999] | 570 | // Call underlying flux computation routine and update |
---|
| 571 | // the explicit update arrays |
---|
| 572 | timestep = _compute_fluxes_vel_ext(cfl, |
---|
| 573 | timestep, |
---|
| 574 | epsilon, |
---|
| 575 | g, |
---|
| 576 | h0, |
---|
| 577 | (long*) neighbours -> data, |
---|
| 578 | (long*) neighbour_vertices -> data, |
---|
| 579 | (double*) normals -> data, |
---|
| 580 | (double*) areas -> data, |
---|
| 581 | (double*) stage_vertex_values -> data, |
---|
| 582 | (double*) xmom_vertex_values -> data, |
---|
| 583 | (double*) bed_vertex_values -> data, |
---|
| 584 | (double*) height_vertex_values -> data, |
---|
| 585 | (double*) velocity_vertex_values -> data, |
---|
| 586 | (double*) stage_boundary_values -> data, |
---|
| 587 | (double*) xmom_boundary_values -> data, |
---|
| 588 | (double*) bed_boundary_values -> data, |
---|
| 589 | (double*) height_boundary_values -> data, |
---|
| 590 | (double*) velocity_boundary_values -> data, |
---|
| 591 | (double*) stage_explicit_update -> data, |
---|
| 592 | (double*) xmom_explicit_update -> data, |
---|
| 593 | number_of_elements, |
---|
| 594 | (double*) max_speed_array -> data); |
---|
[6042] | 595 | |
---|
| 596 | //printf("comp_flux_vel 2 \n"); |
---|
[5999] | 597 | |
---|
| 598 | Py_DECREF(neighbours); |
---|
| 599 | Py_DECREF(neighbour_vertices); |
---|
| 600 | Py_DECREF(normals); |
---|
| 601 | Py_DECREF(areas); |
---|
| 602 | Py_DECREF(stage_vertex_values); |
---|
| 603 | Py_DECREF(xmom_vertex_values); |
---|
| 604 | Py_DECREF(bed_vertex_values); |
---|
| 605 | Py_DECREF(height_vertex_values); |
---|
| 606 | Py_DECREF(velocity_vertex_values); |
---|
| 607 | Py_DECREF(stage_boundary_values); |
---|
| 608 | Py_DECREF(xmom_boundary_values); |
---|
| 609 | Py_DECREF(bed_boundary_values); |
---|
| 610 | Py_DECREF(height_boundary_values); |
---|
| 611 | Py_DECREF(velocity_boundary_values); |
---|
| 612 | Py_DECREF(stage_explicit_update); |
---|
| 613 | Py_DECREF(xmom_explicit_update); |
---|
| 614 | Py_DECREF(max_speed_array); |
---|
| 615 | |
---|
[6042] | 616 | //printf("comp_flux_vel 3 \n"); |
---|
| 617 | |
---|
[5999] | 618 | // Return updated flux timestep |
---|
| 619 | return Py_BuildValue("d", timestep); |
---|
| 620 | } |
---|
| 621 | |
---|
| 622 | |
---|
| 623 | |
---|
| 624 | //------------------------------- |
---|
| 625 | // Method table for python module |
---|
| 626 | //------------------------------- |
---|
| 627 | |
---|
| 628 | static struct PyMethodDef MethodTable[] = { |
---|
| 629 | {"compute_fluxes_ext", compute_fluxes_ext, METH_VARARGS, "Print out"}, |
---|
| 630 | {"compute_fluxes_vel_ext", compute_fluxes_vel_ext, METH_VARARGS, "Print out"}, |
---|
| 631 | {NULL, NULL} |
---|
| 632 | }; |
---|
| 633 | |
---|
| 634 | // Module initialisation |
---|
| 635 | void initcomp_flux_vel_ext(void){ |
---|
| 636 | Py_InitModule("comp_flux_vel_ext", MethodTable); |
---|
| 637 | import_array(); |
---|
| 638 | } |
---|