/*!
\brief Writes feature on level 2
\param Map pointer to Map_info structure
\param type feature type
\param points pointer to line_pnts structure (feature geometry)
\param cats pointer to line_cats structure (feature categories)
\return feature offset into file
\return -1 on error
*/
off_t V2_write_line_ogr(struct Map_info *Map, int type,
const struct line_pnts *points, const struct line_cats *cats)
{
int line;
off_t offset;
struct Plus_head *plus;
struct bound_box box;
line = 0;
G_debug(3, "V2_write_line_ogr()");
offset = V1_write_line_ogr(Map, type, points, cats);
if (offset < 0)
return -1;
/* Update topology */
plus = &(Map->plus);
/* Add line */
if (plus->built >= GV_BUILD_BASE) {
dig_line_box(points, &box);
line = dig_add_line(plus, type, points, &box, offset);
G_debug(3, " line added to topo with id = %d", line);
if (line == 1)
Vect_box_copy(&(plus->box), &box);
else
Vect_box_extend(&(plus->box), &box);
V2__add_line_to_topo_ogr(Map, line, points, cats);
}
G_debug(3, "updated lines : %d , updated nodes : %d", plus->n_uplines,
plus->n_upnodes);
/* returns int line, but is defined as off_t for compatibility with
* Write_line_array in write.c */
return line;
}
/* code taken from Vect_build_nat() */
int level_one_info(struct Map_info *Map)
{
struct Plus_head *plus;
int i, type, first = 1;
off_t offset;
struct line_pnts *Points;
struct line_cats *Cats;
struct bound_box box;
int n_primitives, n_points, n_lines, n_boundaries, n_centroids;
int n_faces, n_kernels;
G_debug(1, "Count vector objects for level 1");
plus = &(Map->plus);
n_primitives = n_points = n_lines = n_boundaries = n_centroids = 0;
n_faces = n_kernels = 0;
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
Vect_rewind(Map);
/* G_message(_("Registering primitives...")); */
i = 1;
while (1) {
/* register line */
type = Vect_read_next_line(Map, Points, Cats);
/* Note: check for dead lines is not needed, because they are skipped by V1_read_next_line_nat() */
if (type == -1) {
G_warning(_("Unable to read vector map"));
return 0;
}
else if (type == -2) {
break;
}
/* count features */
n_primitives++;
if (type & GV_POINT) /* probably most common */
n_points++;
else if (type & GV_LINE)
n_lines++;
else if (type & GV_BOUNDARY)
n_boundaries++;
else if (type & GV_CENTROID)
n_centroids++;
else if (type & GV_KERNEL)
n_kernels++;
else if (type & GV_FACE)
n_faces++;
offset = Map->head.last_offset;
G_debug(3, "Register line: offset = %lu", (unsigned long)offset);
dig_line_box(Points, &box);
if (first == 1) {
Vect_box_copy(&(plus->box), &box);
first = 0;
}
else
Vect_box_extend(&(plus->box), &box);
/* can't print progress, unfortunately */
/*
if (G_verbose() > G_verbose_min() && i % 1000 == 0) {
if (format == G_INFO_FORMAT_PLAIN)
fprintf(stderr, "%d..", i);
else
fprintf(stderr, "%11d\b\b\b\b\b\b\b\b\b\b\b", i);
}
i++;
*/
}
/* save result in plus */
plus->n_lines = n_primitives;
plus->n_plines = n_points;
plus->n_llines = n_lines;
plus->n_blines = n_boundaries;
plus->n_clines = n_centroids;
plus->n_klines = n_kernels;
plus->n_flines = n_faces;
return 1;
}
/*!
\brief Dump topology to file
\param Map vector map
\param out file for output (stdout/stderr for example)
\return 1 on success
\return 0 on error
*/
int Vect_topo_dump(const struct Map_info *Map, FILE *out)
{
int i, j, line, isle;
float angle_deg;
struct P_node *Node;
struct P_line *Line;
struct P_area *Area;
struct P_isle *Isle;
struct bound_box box;
const struct Plus_head *plus;
plus = &(Map->plus);
fprintf(out, "---------- TOPOLOGY DUMP ----------\n");
fprintf(out, "Map: %s\n", Vect_get_full_name(Map));
fprintf(out, "Topology format: ");
if (Map->format == GV_FORMAT_NATIVE)
fprintf(out, "native");
else if (Map->format == GV_FORMAT_POSTGIS &&
Map->fInfo.pg.toposchema_name) {
fprintf(out, "PostGIS");
}
else {
fprintf(out, "pseudo (simple features)");
if (Map->format == GV_FORMAT_OGR)
fprintf(out, " @ OGR");
else
fprintf(out, " @ PostgreSQL");
}
fprintf(out, "\n");
fprintf(out, SEP);
/* box */
Vect_box_copy(&box, &(plus->box));
fprintf(out, "N,S,E,W,T,B: %f, %f, %f, %f, %f, %f\n", box.N, box.S,
box.E, box.W, box.T, box.B);
fprintf(out, SEP);
/* nodes */
fprintf(out, "Nodes (%d nodes, alive + dead):\n", plus->n_nodes);
for (i = 1; i <= plus->n_nodes; i++) {
if (plus->Node[i] == NULL) {
continue;
}
Node = plus->Node[i];
fprintf(out, "node = %d, n_lines = %d, xyz = %f, %f, %f\n", i,
Node->n_lines, Node->x, Node->y, Node->z);
for (j = 0; j < Node->n_lines; j++) {
line = Node->lines[j];
Line = plus->Line[abs(line)];
angle_deg = (Node->angles[j] * 180) / M_PI;
if (angle_deg < 0)
angle_deg += 360;
fprintf(out, " line = %3d, type = %d, angle = %f (%.4f)\n", line,
Line->type, Node->angles[j], angle_deg);
}
}
fprintf(out, SEP);
/* lines */
fprintf(out, "Lines (%d lines, alive + dead):\n", plus->n_lines);
for (i = 1; i <= plus->n_lines; i++) {
if (plus->Line[i] == NULL) {
continue;
}
Line = plus->Line[i];
if (Line->type == GV_POINT) {
fprintf(out, "line = %d, type = %d, offset = %lu\n",
i, Line->type, (unsigned long)Line->offset);
}
else if (Line->type == GV_CENTROID) {
struct P_topo_c *topo = (struct P_topo_c *)Line->topo;
fprintf(out, "line = %d, type = %d, offset = %lu, area = %d\n",
i, Line->type, (unsigned long)Line->offset, topo->area);
}
else if (Line->type == GV_LINE) {
struct P_topo_l *topo = (struct P_topo_l *)Line->topo;
fprintf(out, "line = %d, type = %d, offset = %lu, n1 = %d, n2 = %d\n",
i, Line->type, (unsigned long)Line->offset, topo->N1,
topo->N2);
}
else if (Line->type == GV_BOUNDARY) {
struct P_topo_b *topo = (struct P_topo_b *)Line->topo;
fprintf(out, "line = %d, type = %d, offset = %lu, n1 = %d, n2 = %d, "
"left = %d, right = %d\n",
i, Line->type, (unsigned long)Line->offset, topo->N1,
topo->N2, topo->left, topo->right);
}
else if (Line->type == GV_FACE) {
struct P_topo_f *topo = (struct P_topo_f *)Line->topo;
fprintf(out, "line = %d, type = %d, offset = %lu, e1 = %d, e2 = %d, "
"e3 = %d, left = %d, right = %d\n",
i, Line->type, (unsigned long)Line->offset, topo->E[0],
topo->E[1], topo->E[2], topo->left, topo->right);
}
else if (Line->type == GV_KERNEL) {
struct P_topo_k *topo = (struct P_topo_k *)Line->topo;
fprintf(out, "line = %d, type = %d, offset = %lu, volume = %d",
i, Line->type, (unsigned long)Line->offset, topo->volume);
}
}
fprintf(out, SEP);
/* areas */
fprintf(out, "Areas (%d areas, alive + dead):\n", plus->n_areas);
for (i = 1; i <= plus->n_areas; i++) {
if (plus->Area[i] == NULL) {
continue;
}
Area = plus->Area[i];
fprintf(out, "area = %d, n_lines = %d, n_isles = %d centroid = %d\n",
i, Area->n_lines, Area->n_isles, Area->centroid);
for (j = 0; j < Area->n_lines; j++) {
line = Area->lines[j];
Line = plus->Line[abs(line)];
fprintf(out, " line = %3d\n", line);
}
for (j = 0; j < Area->n_isles; j++) {
isle = Area->isles[j];
fprintf(out, " isle = %3d\n", isle);
}
}
fprintf(out, SEP);
/* isles */
fprintf(out, "Islands (%d islands, alive + dead):\n", plus->n_isles);
for (i = 1; i <= plus->n_isles; i++) {
if (plus->Isle[i] == NULL) {
continue;
}
Isle = plus->Isle[i];
fprintf(out, "isle = %d, n_lines = %d area = %d\n", i, Isle->n_lines,
Isle->area);
for (j = 0; j < Isle->n_lines; j++) {
line = Isle->lines[j];
Line = plus->Line[abs(line)];
fprintf(out, " line = %3d\n", line);
}
}
return 1;
}
int main(int argc, char **argv)
{
struct GModule *module;
struct Option *map_opt, *field_opt, *fs_opt, *vs_opt, *nv_opt, *col_opt,
*where_opt, *file_opt;
struct Flag *c_flag, *v_flag, *r_flag;
dbDriver *driver;
dbString sql, value_string;
dbCursor cursor;
dbTable *table;
dbColumn *column;
dbValue *value;
struct field_info *Fi;
int ncols, col, more;
struct Map_info Map;
char query[1024];
struct ilist *list_lines;
struct bound_box *min_box, *line_box;
int i, line, area, init_box, cat;
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("database"));
G_add_keyword(_("attribute table"));
module->description = _("Prints vector map attributes.");
map_opt = G_define_standard_option(G_OPT_V_MAP);
field_opt = G_define_standard_option(G_OPT_V_FIELD);
col_opt = G_define_standard_option(G_OPT_DB_COLUMNS);
where_opt = G_define_standard_option(G_OPT_DB_WHERE);
fs_opt = G_define_standard_option(G_OPT_F_SEP);
fs_opt->description = _("Output field separator");
fs_opt->guisection = _("Format");
vs_opt = G_define_standard_option(G_OPT_F_SEP);
vs_opt->key = "vs";
vs_opt->description = _("Output vertical record separator");
vs_opt->answer = NULL;
vs_opt->guisection = _("Format");
nv_opt = G_define_option();
nv_opt->key = "nv";
nv_opt->type = TYPE_STRING;
nv_opt->required = NO;
nv_opt->description = _("Null value indicator");
nv_opt->guisection = _("Format");
file_opt = G_define_standard_option(G_OPT_F_OUTPUT);
file_opt->key = "file";
file_opt->required = NO;
file_opt->description =
_("Name for output file (if omitted or \"-\" output to stdout)");
r_flag = G_define_flag();
r_flag->key = 'r';
r_flag->description =
_("Print minimal region extent of selected vector features instead of attributes");
c_flag = G_define_flag();
c_flag->key = 'c';
c_flag->description = _("Do not include column names in output");
c_flag->guisection = _("Format");
v_flag = G_define_flag();
v_flag->key = 'v';
v_flag->description = _("Vertical output (instead of horizontal)");
v_flag->guisection = _("Format");
G_gisinit(argv[0]);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
/* set input vector map name and mapset */
if (file_opt->answer && strcmp(file_opt->answer, "-") != 0) {
if (NULL == freopen(file_opt->answer, "w", stdout)) {
G_fatal_error(_("Unable to open file <%s> for writing"), file_opt->answer);
}
}
if (r_flag->answer) {
min_box = (struct bound_box *) G_malloc(sizeof(struct bound_box));
G_zero((void *)min_box, sizeof(struct bound_box));
line_box = (struct bound_box *) G_malloc(sizeof(struct bound_box));
list_lines = Vect_new_list();
}
else {
min_box = line_box = NULL;
list_lines = NULL;
}
db_init_string(&sql);
db_init_string(&value_string);
/* open input vector */
if (!r_flag->answer)
Vect_open_old_head2(&Map, map_opt->answer, "", field_opt->answer);
else {
if (2 > Vect_open_old2(&Map, map_opt->answer, "", field_opt->answer)) {
Vect_close(&Map);
G_fatal_error(_("Unable to open vector map <%s> at topology level. "
"Flag '%c' requires topology level."),
map_opt->answer, r_flag->key);
}
}
if ((Fi = Vect_get_field2(&Map, field_opt->answer)) == NULL)
G_fatal_error(_("Database connection not defined for layer <%s>"),
field_opt->answer);
driver = db_start_driver_open_database(Fi->driver, Fi->database);
if (!driver)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
if (col_opt->answer)
sprintf(query, "SELECT %s FROM ", col_opt->answer);
else
sprintf(query, "SELECT * FROM ");
db_set_string(&sql, query);
db_append_string(&sql, Fi->table);
if (where_opt->answer) {
char *buf = NULL;
buf = G_malloc((strlen(where_opt->answer) + 8));
sprintf(buf, " WHERE %s", where_opt->answer);
db_append_string(&sql, buf);
G_free(buf);
}
if (db_open_select_cursor(driver, &sql, &cursor, DB_SEQUENTIAL) != DB_OK)
G_fatal_error(_("Unable to open select cursor"));
table = db_get_cursor_table(&cursor);
ncols = db_get_table_number_of_columns(table);
/* column names if horizontal output (ignore for -r) */
if (!v_flag->answer && !c_flag->answer && !r_flag->answer) {
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
if (col)
fprintf(stdout, "%s", fs_opt->answer);
fprintf(stdout, "%s", db_get_column_name(column));
}
fprintf(stdout, "\n");
}
init_box = 1;
/* fetch the data */
while (1) {
if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK)
G_fatal_error(_("Unable to fetch data from table <%s>"),
Fi->table);
if (!more)
break;
cat = -1;
for (col = 0; col < ncols; col++) {
column = db_get_table_column(table, col);
value = db_get_column_value(column);
if (cat < 0 && strcmp(Fi->key, db_get_column_name(column)) == 0) {
cat = db_get_value_int(value);
if (r_flag->answer)
break;
}
if (r_flag->answer)
continue;
db_convert_column_value_to_string(column, &value_string);
if (!c_flag->answer && v_flag->answer)
fprintf(stdout, "%s%s", db_get_column_name(column),
fs_opt->answer);
if (col && !v_flag->answer)
fprintf(stdout, "%s", fs_opt->answer);
if (nv_opt->answer && db_test_value_isnull(value))
fprintf(stdout, "%s", nv_opt->answer);
else
fprintf(stdout, "%s", db_get_string(&value_string));
if (v_flag->answer)
fprintf(stdout, "\n");
}
if (r_flag->answer) {
/* get minimal region extent */
Vect_cidx_find_all(&Map, Vect_get_field_number(&Map, field_opt->answer), -1, cat, list_lines);
for (i = 0; i < list_lines->n_values; i++) {
line = list_lines->value[i];
area = Vect_get_centroid_area(&Map, line);
if (area > 0) {
if (!Vect_get_area_box(&Map, area, line_box))
G_fatal_error(_("Unable to get bounding box of area %d"),
area);
}
else {
if (!Vect_get_line_box(&Map, line, line_box))
G_fatal_error(_("Unable to get bounding box of line %d"),
line);
}
if (init_box) {
Vect_box_copy(min_box, line_box);
init_box = 0;
}
else {
Vect_box_extend(min_box, line_box);
}
}
}
else {
if (!v_flag->answer)
fprintf(stdout, "\n");
else if (vs_opt->answer)
fprintf(stdout, "%s\n", vs_opt->answer);
}
}
if (r_flag->answer) {
fprintf(stdout, "n=%f\n", min_box->N);
fprintf(stdout, "s=%f\n", min_box->S);
fprintf(stdout, "w=%f\n", min_box->W);
fprintf(stdout, "e=%f\n", min_box->E);
if (Vect_is_3d(&Map)) {
fprintf(stdout, "t=%f\n", min_box->T);
fprintf(stdout, "b=%f\n", min_box->B);
}
fflush(stdout);
G_free((void *)min_box);
G_free((void *)line_box);
Vect_destroy_list(list_lines);
}
db_close_cursor(&cursor);
db_close_database_shutdown_driver(driver);
Vect_close(&Map);
exit(EXIT_SUCCESS);
}
/*!
\brief Build topology
\param Map vector map
\param build build level
\return 1 on success
\return 0 on error
*/
int Vect_build_nat(struct Map_info *Map, int build)
{
struct Plus_head *plus;
int i, s, type, line;
off_t offset;
int side, area;
struct line_cats *Cats;
struct P_line *Line;
struct P_area *Area;
struct bound_box box;
G_debug(3, "Vect_build_nat() build = %d", build);
plus = &(Map->plus);
if (build == plus->built)
return 1; /* Do nothing */
/* Check if upgrade or downgrade */
if (build < plus->built) {
/* -> downgrade */
Vect__build_downgrade(Map, build);
return 1;
}
/* -> upgrade */
if (!Points)
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
if (plus->built < GV_BUILD_BASE) {
int npoints, c;
/*
* We shall go through all primitives in coor file and add
* new node for each end point to nodes structure if the node
* with the same coordinates doesn't exist yet.
*/
/* register lines, create nodes */
Vect_rewind(Map);
G_message(_("Registering primitives..."));
i = 0;
npoints = 0;
while (TRUE) {
/* register line */
type = Vect_read_next_line(Map, Points, Cats);
/* Note: check for dead lines is not needed, because they
are skipped by V1_read_next_line() */
if (type == -1) {
G_warning(_("Unable to read vector map"));
return 0;
}
else if (type == -2) {
break;
}
G_progress(++i, 1e4);
npoints += Points->n_points;
offset = Map->head.last_offset;
G_debug(3, "Register line: offset = %lu", (unsigned long)offset);
dig_line_box(Points, &box);
line = dig_add_line(plus, type, Points, &box, offset);
if (line == 1)
Vect_box_copy(&(plus->box), &box);
else
Vect_box_extend(&(plus->box), &box);
/* Add all categories to category index */
if (build == GV_BUILD_ALL) {
for (c = 0; c < Cats->n_cats; c++) {
dig_cidx_add_cat(plus, Cats->field[c], Cats->cat[c],
line, type);
}
if (Cats->n_cats == 0) /* add field 0, cat 0 */
dig_cidx_add_cat(plus, 0, 0, line, type);
}
}
G_progress(1, 1);
G_message(_n("One primitive registered", "%d primitives registered", plus->n_lines), plus->n_lines);
G_message(_n("One vertex registered", "%d vertices registered", npoints), npoints);
plus->built = GV_BUILD_BASE;
}
if (build < GV_BUILD_AREAS)
return 1;
if (plus->built < GV_BUILD_AREAS) {
/* Build areas */
/* Go through all bundaries and try to build area for both sides */
G_important_message(_("Building areas..."));
for (line = 1; line <= plus->n_lines; line++) {
G_percent(line, plus->n_lines, 1);
/* build */
if (plus->Line[line] == NULL) {
continue;
} /* dead line */
Line = plus->Line[line];
if (Line->type != GV_BOUNDARY) {
continue;
}
for (s = 0; s < 2; s++) {
if (s == 0)
side = GV_LEFT;
else
side = GV_RIGHT;
G_debug(3, "Build area for line = %d, side = %d", line, side);
Vect_build_line_area(Map, line, side);
}
}
G_message(_n("One area built", "%d areas built", plus->n_areas), plus->n_areas);
G_message(_n("One isle built", "%d isles built", plus->n_isles), plus->n_isles);
plus->built = GV_BUILD_AREAS;
}
if (build < GV_BUILD_ATTACH_ISLES)
return 1;
/* Attach isles to areas */
if (plus->built < GV_BUILD_ATTACH_ISLES) {
G_important_message(_("Attaching islands..."));
for (i = 1; i <= plus->n_isles; i++) {
G_percent(i, plus->n_isles, 1);
Vect_attach_isle(Map, i);
}
plus->built = GV_BUILD_ATTACH_ISLES;
}
if (build < GV_BUILD_CENTROIDS)
return 1;
/* Attach centroids to areas */
if (plus->built < GV_BUILD_CENTROIDS) {
int nlines;
struct P_topo_c *topo;
G_important_message(_("Attaching centroids..."));
nlines = Vect_get_num_lines(Map);
for (line = 1; line <= nlines; line++) {
G_percent(line, nlines, 1);
Line = plus->Line[line];
if (!Line)
continue; /* Dead */
if (Line->type != GV_CENTROID)
continue;
Vect_read_line(Map, Points, NULL, line);
area = Vect_find_area(Map, Points->x[0], Points->y[0]);
if (area > 0) {
G_debug(3, "Centroid (line=%d) in area %d", line, area);
Area = plus->Area[area];
topo = (struct P_topo_c *)Line->topo;
if (Area->centroid == 0) { /* first */
Area->centroid = line;
topo->area = area;
}
else { /* duplicate */
topo->area = -area;
}
}
}
plus->built = GV_BUILD_CENTROIDS;
}
/* Add areas to category index */
for (i = 1; i <= plus->n_areas; i++) {
int c;
if (plus->Area[i] == NULL)
continue;
if (plus->Area[i]->centroid > 0) {
Vect_read_line(Map, NULL, Cats, plus->Area[i]->centroid);
for (c = 0; c < Cats->n_cats; c++) {
dig_cidx_add_cat(plus, Cats->field[c], Cats->cat[c], i,
GV_AREA);
}
}
if (plus->Area[i]->centroid == 0 || Cats->n_cats == 0) /* no centroid or no cats */
dig_cidx_add_cat(plus, 0, 0, i, GV_AREA);
}
Vect_destroy_cats_struct(Cats);
return 1;
}
int main(int argc, char *argv[])
{
char *output, buf[DB_SQL_MAX];
double (*rng)(void) = G_drand48;
double zmin, zmax;
int seed;
int i, j, k, n, type, usefloat;
int area, nareas, field;
struct boxlist *List = NULL;
BOX_SIZE *size_list = NULL;
int alloc_size_list = 0;
struct Map_info In, Out;
struct line_pnts *Points;
struct line_cats *Cats;
struct cat_list *cat_list;
struct bound_box box;
struct Cell_head window;
struct GModule *module;
struct
{
struct Option *input, *field, *cats, *where, *output, *nsites,
*zmin, *zmax, *zcol, *ztype, *seed;
} parm;
struct
{
struct Flag *z, *notopo, *a;
} flag;
struct field_info *Fi;
dbDriver *driver;
dbTable *table;
dbString sql;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("sampling"));
G_add_keyword(_("statistics"));
G_add_keyword(_("random"));
module->description = _("Generates random 2D/3D vector points.");
parm.output = G_define_standard_option(G_OPT_V_OUTPUT);
parm.nsites = G_define_option();
parm.nsites->key = "n";
parm.nsites->type = TYPE_INTEGER;
parm.nsites->required = YES;
parm.nsites->description = _("Number of points to be created");
parm.input = G_define_standard_option(G_OPT_V_INPUT);
parm.input->required = NO;
parm.input->description = _("Restrict points to areas in input vector");
parm.input->guisection = _("Selection");
parm.field = G_define_standard_option(G_OPT_V_FIELD_ALL);
parm.field->guisection = _("Selection");
parm.cats = G_define_standard_option(G_OPT_V_CATS);
parm.cats->guisection = _("Selection");
parm.where = G_define_standard_option(G_OPT_DB_WHERE);
parm.where->guisection = _("Selection");
parm.zmin = G_define_option();
parm.zmin->key = "zmin";
parm.zmin->type = TYPE_DOUBLE;
parm.zmin->required = NO;
parm.zmin->description =
_("Minimum z height (needs -z flag or column name)");
parm.zmin->answer = "0.0";
parm.zmin->guisection = _("3D output");
parm.zmax = G_define_option();
parm.zmax->key = "zmax";
parm.zmax->type = TYPE_DOUBLE;
parm.zmax->required = NO;
parm.zmax->description =
_("Maximum z height (needs -z flag or column name)");
parm.zmax->answer = "0.0";
parm.zmax->guisection = _("3D output");
parm.seed = G_define_option();
parm.seed->key = "seed";
parm.seed->type = TYPE_INTEGER;
parm.seed->required = NO;
parm.seed->description =
_("The seed to initialize the random generator. If not set the process ID is used");
parm.zcol = G_define_standard_option(G_OPT_DB_COLUMN);
parm.zcol->label = _("Name of column for z values");
parm.zcol->description =
_("Writes z values to column");
parm.zcol->guisection = _("3D output");
parm.ztype = G_define_option();
parm.ztype->key = "column_type";
parm.ztype->type = TYPE_STRING;
parm.ztype->required = NO;
parm.ztype->multiple = NO;
parm.ztype->description = _("Type of column for z values");
parm.ztype->options = "integer,double precision";
parm.ztype->answer = "double precision";
parm.ztype->guisection = _("3D output");
flag.z = G_define_flag();
flag.z->key = 'z';
flag.z->description = _("Create 3D output");
flag.z->guisection = _("3D output");
flag.a = G_define_flag();
flag.a->key = 'a';
flag.a->description = _("Generate n points for each individual area");
flag.notopo = G_define_standard_flag(G_FLG_V_TOPO);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
output = parm.output->answer;
n = atoi(parm.nsites->answer);
if(parm.seed->answer)
seed = atoi(parm.seed->answer);
if (n <= 0) {
G_fatal_error(_("Number of points must be > 0 (%d given)"), n);
}
nareas = 0;
cat_list = NULL;
field = -1;
if (parm.input->answer) {
Vect_set_open_level(2); /* topology required */
if (2 > Vect_open_old2(&In, parm.input->answer, "", parm.field->answer))
G_fatal_error(_("Unable to open vector map <%s>"),
parm.input->answer);
if (parm.field->answer)
field = Vect_get_field_number(&In, parm.field->answer);
if ((parm.cats->answer || parm.where->answer) && field == -1) {
G_warning(_("Invalid layer number (%d). Parameter '%s' or '%s' specified, assuming layer '1'."),
field, parm.cats->key, parm.where->key);
field = 1;
}
if (field > 0)
cat_list = Vect_cats_set_constraint(&In, field, parm.where->answer,
parm.cats->answer);
nareas = Vect_get_num_areas(&In);
if (nareas == 0) {
Vect_close(&In);
G_fatal_error(_("No areas in vector map <%s>"), parm.input->answer);
}
}
else {
if (flag.a->answer)
G_fatal_error(_("The <-%c> flag requires an input vector with areas"),
flag.a->key);
}
/* create new vector map */
if (-1 == Vect_open_new(&Out, output, flag.z->answer ? WITH_Z : WITHOUT_Z))
G_fatal_error(_("Unable to create vector map <%s>"), output);
Vect_set_error_handler_io(NULL, &Out);
/* Do we need to write random values into attribute table? */
usefloat = -1;
if (parm.zcol->answer) {
Fi = Vect_default_field_info(&Out, 1, NULL, GV_1TABLE);
driver =
db_start_driver_open_database(Fi->driver,
Vect_subst_var(Fi->database, &Out));
if (driver == NULL) {
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Vect_subst_var(Fi->database, &Out), Fi->driver);
}
db_set_error_handler_driver(driver);
db_begin_transaction(driver);
db_init_string(&sql);
sprintf(buf, "create table %s (%s integer, %s %s)", Fi->table, GV_KEY_COLUMN,
parm.zcol->answer, parm.ztype->answer);
db_set_string(&sql, buf);
Vect_map_add_dblink(&Out, 1, NULL, Fi->table, GV_KEY_COLUMN, Fi->database,
Fi->driver);
/* Create table */
G_debug(3, db_get_string(&sql));
if (db_execute_immediate(driver, &sql) != DB_OK) {
G_fatal_error(_("Unable to create table: %s"),
db_get_string(&sql));
}
/* Create index */
if (db_create_index2(driver, Fi->table, Fi->key) != DB_OK)
G_warning(_("Unable to create index"));
/* Grant */
if (db_grant_on_table
(driver, Fi->table, DB_PRIV_SELECT,
DB_GROUP | DB_PUBLIC) != DB_OK) {
G_fatal_error(_("Unable to grant privileges on table <%s>"),
Fi->table);
}
/* OK. Let's check what type of column user has created */
db_set_string(&sql, Fi->table);
if (db_describe_table(driver, &sql, &table) != DB_OK) {
G_fatal_error(_("Unable to describe table <%s>"), Fi->table);
}
if (db_get_table_number_of_columns(table) != 2) {
G_fatal_error(_("Table should contain only two columns"));
}
type = db_get_column_sqltype(db_get_table_column(table, 1));
if (type == DB_SQL_TYPE_SMALLINT || type == DB_SQL_TYPE_INTEGER)
usefloat = 0;
if (type == DB_SQL_TYPE_REAL || type == DB_SQL_TYPE_DOUBLE_PRECISION)
usefloat = 1;
if (usefloat < 0) {
G_fatal_error(_("You have created unsupported column type. This module supports only INTEGER"
" and DOUBLE PRECISION column types."));
}
}
Vect_hist_command(&Out);
/* Init the random seed */
if(parm.seed->answer)
G_srand48(seed);
else
G_srand48_auto();
G_get_window(&window);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
if (nareas > 0) {
int first = 1, count;
struct bound_box abox, bbox;
box.W = window.west;
box.E = window.east;
box.S = window.south;
box.N = window.north;
box.B = -PORT_DOUBLE_MAX;
box.T = PORT_DOUBLE_MAX;
count = 0;
for (i = 1; i <= nareas; i++) {
if (!Vect_get_area_centroid(&In, i))
continue;
if (field > 0) {
if (Vect_get_area_cats(&In, i, Cats))
continue;
if (!Vect_cats_in_constraint(Cats, field, cat_list))
continue;
}
Vect_get_area_box(&In, i, &abox);
if (!Vect_box_overlap(&abox, &box))
continue;
if (first) {
Vect_box_copy(&bbox, &abox);
first = 0;
}
else
Vect_box_extend(&bbox, &abox);
count++;
}
if (count == 0) {
Vect_close(&In);
Vect_close(&Out);
Vect_delete(output);
G_fatal_error(_("Selected areas in input vector <%s> do not overlap with the current region"),
parm.input->answer);
}
Vect_box_copy(&box, &bbox);
/* does the vector overlap with the current region ? */
if (box.W >= window.east || box.E <= window.west ||
box.S >= window.north || box.N <= window.south) {
Vect_close(&In);
Vect_close(&Out);
Vect_delete(output);
G_fatal_error(_("Input vector <%s> does not overlap with the current region"),
parm.input->answer);
}
/* try to reduce the current region */
if (window.east > box.E)
window.east = box.E;
if (window.west < box.W)
window.west = box.W;
if (window.north > box.N)
window.north = box.N;
if (window.south < box.S)
window.south = box.S;
List = Vect_new_boxlist(1);
alloc_size_list = 10;
size_list = G_malloc(alloc_size_list * sizeof(BOX_SIZE));
}
zmin = zmax = 0;
if (flag.z->answer || parm.zcol->answer) {
zmax = atof(parm.zmax->answer);
zmin = atof(parm.zmin->answer);
}
G_message(_("Generating points..."));
if (flag.a->answer && nareas > 0) {
struct bound_box abox, bbox;
int cat = 1;
/* n points for each area */
nareas = Vect_get_num_areas(&In);
G_percent(0, nareas, 1);
for (area = 1; area <= nareas; area++) {
G_percent(area, nareas, 1);
if (!Vect_get_area_centroid(&In, area))
continue;
if (field > 0) {
if (Vect_get_area_cats(&In, area, Cats))
continue;
if (!Vect_cats_in_constraint(Cats, field, cat_list)) {
continue;
}
}
box.W = window.west;
box.E = window.east;
box.S = window.south;
box.N = window.north;
box.B = -PORT_DOUBLE_MAX;
box.T = PORT_DOUBLE_MAX;
Vect_get_area_box(&In, area, &abox);
if (!Vect_box_overlap(&box, &abox))
continue;
bbox = abox;
if (bbox.W < box.W)
bbox.W = box.W;
if (bbox.E > box.E)
bbox.E = box.E;
if (bbox.S < box.S)
bbox.S = box.S;
if (bbox.N > box.N)
bbox.N = box.N;
for (i = 0; i < n; ++i) {
double x, y, z;
int outside = 1;
int ret;
Vect_reset_line(Points);
Vect_reset_cats(Cats);
while (outside) {
x = rng() * (bbox.W - bbox.E) + bbox.E;
y = rng() * (bbox.N - bbox.S) + bbox.S;
z = rng() * (zmax - zmin) + zmin;
ret = Vect_point_in_area(x, y, &In, area, &abox);
G_debug(3, " area = %d Vect_point_in_area() = %d", area, ret);
if (ret >= 1) {
outside = 0;
}
}
if (flag.z->answer)
Vect_append_point(Points, x, y, z);
else
Vect_append_point(Points, x, y, 0.0);
if (parm.zcol->answer) {
sprintf(buf, "insert into %s values ( %d, ", Fi->table, i + 1);
db_set_string(&sql, buf);
/* Round random value if column is integer type */
if (usefloat)
sprintf(buf, "%f )", z);
else
sprintf(buf, "%.0f )", z);
db_append_string(&sql, buf);
G_debug(3, db_get_string(&sql));
if (db_execute_immediate(driver, &sql) != DB_OK) {
G_fatal_error(_("Cannot insert new row: %s"),
db_get_string(&sql));
}
}
Vect_cat_set(Cats, 1, cat++);
Vect_write_line(&Out, GV_POINT, Points, Cats);
}
}
}
else {
/* n points in total */
for (i = 0; i < n; ++i) {
double x, y, z;
G_percent(i, n, 4);
Vect_reset_line(Points);
Vect_reset_cats(Cats);
x = rng() * (window.west - window.east) + window.east;
y = rng() * (window.north - window.south) + window.south;
z = rng() * (zmax - zmin) + zmin;
if (nareas) {
int outside = 1;
do {
/* select areas by box */
box.E = x;
box.W = x;
box.N = y;
box.S = y;
box.T = PORT_DOUBLE_MAX;
box.B = -PORT_DOUBLE_MAX;
Vect_select_areas_by_box(&In, &box, List);
G_debug(3, " %d areas selected by box", List->n_values);
/* sort areas by size, the smallest is likely to be the nearest */
if (alloc_size_list < List->n_values) {
alloc_size_list = List->n_values;
size_list = G_realloc(size_list, alloc_size_list * sizeof(BOX_SIZE));
}
k = 0;
for (j = 0; j < List->n_values; j++) {
area = List->id[j];
if (!Vect_get_area_centroid(&In, area))
continue;
if (field > 0) {
if (Vect_get_area_cats(&In, area, Cats))
continue;
if (!Vect_cats_in_constraint(Cats, field, cat_list)) {
continue;
}
}
List->id[k] = List->id[j];
List->box[k] = List->box[j];
size_list[k].i = List->id[k];
box = List->box[k];
size_list[k].box = List->box[k];
size_list[k].size = (box.N - box.S) * (box.E - box.W);
k++;
}
List->n_values = k;
if (List->n_values == 2) {
/* simple swap */
if (size_list[1].size < size_list[0].size) {
size_list[0].i = List->id[1];
size_list[1].i = List->id[0];
size_list[0].box = List->box[1];
size_list[1].box = List->box[0];
}
}
else if (List->n_values > 2)
qsort(size_list, List->n_values, sizeof(BOX_SIZE), sort_by_size);
for (j = 0; j < List->n_values; j++) {
int ret;
area = size_list[j].i;
ret = Vect_point_in_area(x, y, &In, area, &size_list[j].box);
G_debug(3, " area = %d Vect_point_in_area() = %d", area, ret);
if (ret >= 1) {
outside = 0;
break;
}
}
if (outside) {
x = rng() * (window.west - window.east) + window.east;
y = rng() * (window.north - window.south) + window.south;
z = rng() * (zmax - zmin) + zmin;
}
} while (outside);
}
if (flag.z->answer)
Vect_append_point(Points, x, y, z);
else
Vect_append_point(Points, x, y, 0.0);
if (parm.zcol->answer) {
sprintf(buf, "insert into %s values ( %d, ", Fi->table, i + 1);
db_set_string(&sql, buf);
/* Round random value if column is integer type */
if (usefloat)
sprintf(buf, "%f )", z);
else
sprintf(buf, "%.0f )", z);
db_append_string(&sql, buf);
G_debug(3, db_get_string(&sql));
if (db_execute_immediate(driver, &sql) != DB_OK) {
G_fatal_error(_("Cannot insert new row: %s"),
db_get_string(&sql));
}
}
Vect_cat_set(Cats, 1, i + 1);
Vect_write_line(&Out, GV_POINT, Points, Cats);
}
G_percent(1, 1, 1);
}
if (parm.zcol->answer) {
db_commit_transaction(driver);
db_close_database_shutdown_driver(driver);
}
if (!flag.notopo->answer) {
Vect_build(&Out);
}
Vect_close(&Out);
exit(EXIT_SUCCESS);
}
