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Geoiterator for unstructured grids (Part 1)

This commit is contained in:
shahramn 2024-10-09 22:22:34 +01:00 committed by Pedro Maciel
parent f68e03fa11
commit 91bd961e05
5 changed files with 174 additions and 0 deletions
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3
definitions/grib2/templates/template.3.101.def
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@ -14,3 +14,6 @@ unsigned[1] numberOfGridInReference : dump;
byte[16] uuidOfHGrid : dump;
template_nofail unstructuredGrid "grib2/localConcepts/[centre:s]/unstructuredGrid.def";
iterator unstructured(numberOfPoints, missingValue, values,
numberOfGridUsed, numberOfGridInReference, uuidOfHGrid);

1
src/CMakeLists.txt
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@ -332,6 +332,7 @@ list( APPEND eccodes_src_files
grib_nearest_class_polar_stereographic.cc
grib_nearest_class_space_view.cc
grib_iterator_class_polar_stereographic.cc
grib_iterator_class_unstructured.cc
grib_iterator_class_lambert_azimuthal_equal_area.cc
grib_iterator_class_lambert_conformal.cc
grib_iterator_class_mercator.cc

1
src/grib_iterator_class.h
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@ -11,3 +11,4 @@ extern grib_iterator_class* grib_iterator_class_mercator;
extern grib_iterator_class* grib_iterator_class_polar_stereographic;
extern grib_iterator_class* grib_iterator_class_regular;
extern grib_iterator_class* grib_iterator_class_space_view;
extern grib_iterator_class* grib_iterator_class_unstructured;

168
src/grib_iterator_class_unstructured.cc Normal file
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@ -0,0 +1,168 @@
/*
* (C) Copyright 2005- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
*/
#include "grib_api_internal.h"
#include <cmath>
/*
This is used by make_class.pl
START_CLASS_DEF
CLASS = iterator
SUPER = grib_iterator_class_gen
IMPLEMENTS = destroy
IMPLEMENTS = init;next
MEMBERS = double *lats
MEMBERS = double *lons
MEMBERS = long Nj
END_CLASS_DEF
*/
/* START_CLASS_IMP */
/*
Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "iterator.class" and rerun ./make_class.pl
*/
static void init_class (grib_iterator_class*);
static int init (grib_iterator* i,grib_handle*,grib_arguments*);
static int next (grib_iterator* i, double *lat, double *lon, double *val);
static int destroy (grib_iterator* i);
typedef struct grib_iterator_unstructured{
grib_iterator it;
/* Members defined in gen */
int carg;
const char* missingValue;
/* Members defined in unstructured */
double *lats;
double *lons;
long Nj;
} grib_iterator_unstructured;
extern grib_iterator_class* grib_iterator_class_gen;
static grib_iterator_class _grib_iterator_class_unstructured = {
&grib_iterator_class_gen, /* super */
"unstructured", /* name */
sizeof(grib_iterator_unstructured),/* size of instance */
0, /* inited */
&init_class, /* init_class */
&init, /* constructor */
&destroy, /* destructor */
&next, /* Next Value */
0, /* Previous Value */
0, /* Reset the counter */
0, /* has next values */
};
grib_iterator_class* grib_iterator_class_unstructured = &_grib_iterator_class_unstructured;
static void init_class(grib_iterator_class* c)
{
c->previous = (*(c->super))->previous;
c->reset = (*(c->super))->reset;
c->has_next = (*(c->super))->has_next;
}
/* END_CLASS_IMP */
#define ITER "Unstructured grid Geoiterator"
static int next(grib_iterator* iter, double* lat, double* lon, double* val)
{
grib_iterator_unstructured* self = (grib_iterator_unstructured*)iter;
if ((long)iter->e >= (long)(iter->nv - 1))
return 0;
iter->e++;
*lat = self->lats[iter->e];
*lon = self->lons[iter->e];
if (val && iter->data) {
*val = iter->data[iter->e];
}
return 1;
}
static int init(grib_iterator* iter, grib_handle* h, grib_arguments* args)
{
// int ret = 0;
// double *lats, *lons; /* arrays for latitudes and longitudes */
// grib_iterator_unstructured* self = (grib_iterator_unstructured*)iter;
return GRIB_NOT_IMPLEMENTED;
// const char* s_radius = grib_arguments_get_name(h, args, self->carg++);
// const char* s_nx = grib_arguments_get_name(h, args, self->carg++);
// const char* s_ny = grib_arguments_get_name(h, args, self->carg++);
// const char* s_latFirstInDegrees = grib_arguments_get_name(h, args, self->carg++);
// const char* s_lonFirstInDegrees = grib_arguments_get_name(h, args, self->carg++);
// const char* s_southPoleOnPlane = grib_arguments_get_name(h, args, self->carg++);
// const char* s_centralLongitude = grib_arguments_get_name(h, args, self->carg++);
// const char* s_centralLatitude = grib_arguments_get_name(h, args, self->carg++);
// const char* s_Dx = grib_arguments_get_name(h, args, self->carg++);
// const char* s_Dy = grib_arguments_get_name(h, args, self->carg++);
// const char* s_iScansNegatively = grib_arguments_get_name(h, args, self->carg++);
// const char* s_jScansPositively = grib_arguments_get_name(h, args, self->carg++);
// const char* s_jPointsAreConsecutive = grib_arguments_get_name(h, args, self->carg++);
// const char* s_alternativeRowScanning = grib_arguments_get_name(h, args, self->carg++);
// if (iter->nv != nx * ny) {
// grib_context_log(h->context, GRIB_LOG_ERROR, "%s: Wrong number of points (%zu!=%ldx%ld)", ITER, iter->nv, nx, ny);
// return GRIB_WRONG_GRID;
// }
// if ((ret = grib_get_double_internal(h, s_latFirstInDegrees, &latFirstInDegrees)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_double_internal(h, s_lonFirstInDegrees, &lonFirstInDegrees)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_long_internal(h, s_southPoleOnPlane, &southPoleOnPlane)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_double_internal(h, s_centralLongitude, &centralLongitudeInDegrees)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_double_internal(h, s_centralLatitude, &centralLatitudeInDegrees)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_double_internal(h, s_Dx, &Dx)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_double_internal(h, s_Dy, &Dy)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_long_internal(h, s_jPointsAreConsecutive, &jPointsAreConsecutive)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_long_internal(h, s_jScansPositively, &jScansPositively)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_long_internal(h, s_iScansNegatively, &iScansNegatively)) != GRIB_SUCCESS)
// return ret;
// if ((ret = grib_get_long_internal(h, s_alternativeRowScanning, &alternativeRowScanning)) != GRIB_SUCCESS)
// return ret;
// iter->e = -1;
// /* Apply the scanning mode flags which may require data array to be transformed */
// ret = transform_iterator_data(h->context, iter->data,
// iScansNegatively, jScansPositively, jPointsAreConsecutive, alternativeRowScanning,
// iter->nv, nx, ny);
// return ret;
}
static int destroy(grib_iterator* i)
{
grib_iterator_unstructured* self = (grib_iterator_unstructured*)i;
const grib_context* c = i->h->context;
grib_context_free(c, self->lats);
grib_context_free(c, self->lons);
return GRIB_SUCCESS;
}

1
src/grib_iterator_factory.h
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@ -11,3 +11,4 @@
{ "polar_stereographic", &grib_iterator_class_polar_stereographic, },
{ "regular", &grib_iterator_class_regular, },
{ "space_view", &grib_iterator_class_space_view, },
{ "unstructured", &grib_iterator_class_unstructured, },