int rmdac(struct Map_info *Out, struct Map_info *Err)
{
int i, type, area, ndupl, nlines;
struct line_pnts *Points;
struct line_cats *Cats;
nlines = Vect_get_num_lines(Out);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
G_debug(1, "nlines = %d", nlines);
ndupl = 0;
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 2);
if (!Vect_line_alive(Out, i))
continue;
type = Vect_read_line(Out, Points, Cats, i);
if (!(type & GV_CENTROID))
continue;
area = Vect_get_centroid_area(Out, i);
G_debug(3, " area = %d", area);
if (area < 0) {
Vect_delete_line(Out, i);
ndupl++;
if (Err) {
Vect_write_line(Err, type, Points, Cats);
}
}
}
G_verbose_message(_("Duplicate area centroids: %d"), ndupl);
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats);
return ndupl;
}
int edit_line_end(void *closure)
{
struct edit_line *el = closure;
if (el->phase > 1) {
if (el->reversed)
Vect_line_reverse(el->Points);
if (el->Points->n_points > 1) {
Vect_rewrite_line(&Map, el->line, el->line_type, el->Points,
el->Cats);
updated_lines_and_nodes_erase_refresh_display();
}
else {
int i;
/* delete lines with less than two points */
Vect_delete_line(&Map, el->line);
for (i = 0; i < el->Cats->n_cats; i++) {
check_record(el->Cats->field[i], el->Cats->cat[i]);
}
}
Vect_destroy_line_struct(el->Points);
Vect_destroy_cats_struct(el->Cats);
}
i_prompt("");
i_prompt_buttons("", "", "");
i_coor(COOR_NULL, COOR_NULL);
G_debug(3, "edit_line(): End");
return 1;
}
/* merge a given line with all other lines of the same type and
* with the same categories */
static int merge_line(struct Map_info *Map, int line,
struct line_pnts *MPoints, struct line_cats *MCats)
{
int nlines, i, first, last, next_line, curr_line;
int merged = 0, newl = 0;
int next_node, direction, node_n_lines, type, ltype, lines_type;
static struct ilist *List = NULL;
static struct line_pnts *Points = NULL;
static struct line_cats *Cats = NULL;
type = GV_LINE;
nlines = Vect_get_num_lines(Map);
if (!Points)
Points = Vect_new_line_struct();
if (!Cats)
Cats = Vect_new_cats_struct();
if (!List)
List = Vect_new_list();
Vect_reset_line(Points);
Vect_reset_cats(Cats);
Vect_reset_cats(MCats);
Vect_reset_list(List);
if (!Vect_line_alive(Map, line))
return 0;
ltype = Vect_get_line_type(Map, line);
if (!(ltype & type))
return 0;
Vect_read_line(Map, MPoints, MCats, line);
/* special cases:
* - loop back to start boundary via several other boundaries
* - one boundary forming closed loop
* - node with 3 entries but only 2 boundaries, one of them connecting twice,
* the other one must then be topologically incorrect in case of boundary */
/* go backward as long as there is only one other line/boundary at the current node */
G_debug(3, "go backward");
Vect_get_line_nodes(Map, line, &next_node, NULL);
first = -line;
while (1) {
node_n_lines = Vect_get_node_n_lines(Map, next_node);
/* count lines/boundaries at this node */
lines_type = 0;
next_line = first;
for (i = 0; i < node_n_lines; i++) {
curr_line = Vect_get_node_line(Map, next_node, i);
if ((Vect_get_line_type(Map, abs(curr_line)) & GV_LINES))
lines_type++;
if ((Vect_get_line_type(Map, abs(curr_line)) == ltype)) {
if (abs(curr_line) != abs(first)) {
Vect_read_line(Map, NULL, Cats, abs(curr_line));
/* catgories must be identical */
if (compare_cats(MCats, Cats) == 0)
next_line = curr_line;
}
}
}
if (lines_type == 2 && abs(next_line) != abs(first) &&
abs(next_line) != line) {
first = next_line;
if (first < 0) {
Vect_get_line_nodes(Map, -first, &next_node, NULL);
}
else {
Vect_get_line_nodes(Map, first, NULL, &next_node);
}
}
else
break;
}
/* go forward as long as there is only one other line/boundary at the current node */
G_debug(3, "go forward");
/* reverse direction */
last = -first;
if (last < 0) {
Vect_get_line_nodes(Map, -last, &next_node, NULL);
}
else {
Vect_get_line_nodes(Map, last, NULL, &next_node);
}
Vect_reset_list(List);
while (1) {
G_ilist_add(List, last);
node_n_lines = Vect_get_node_n_lines(Map, next_node);
lines_type = 0;
next_line = last;
for (i = 0; i < node_n_lines; i++) {
curr_line = Vect_get_node_line(Map, next_node, i);
if ((Vect_get_line_type(Map, abs(curr_line)) & GV_LINES))
lines_type++;
if ((Vect_get_line_type(Map, abs(curr_line)) == ltype)) {
if (abs(curr_line) != abs(last)) {
Vect_read_line(Map, NULL, Cats, abs(curr_line));
if (compare_cats(MCats, Cats) == 0)
next_line = curr_line;
}
}
}
if (lines_type == 2 && abs(next_line) != abs(last) &&
abs(next_line) != abs(first)) {
last = next_line;
if (last < 0) {
Vect_get_line_nodes(Map, -last, &next_node, NULL);
}
else {
Vect_get_line_nodes(Map, last, NULL, &next_node);
}
}
else
break;
}
/* merge lines */
G_debug(3, "merge %d lines", List->n_values);
Vect_reset_line(MPoints);
for (i = 0; i < List->n_values; i++) {
Vect_reset_line(Points);
Vect_read_line(Map, Points, Cats, abs(List->value[i]));
direction = (List->value[i] < 0 ? GV_BACKWARD : GV_FORWARD);
Vect_append_points(MPoints, Points, direction);
MPoints->n_points--;
Vect_delete_line(Map, abs(List->value[i]));
}
MPoints->n_points++;
merged += List->n_values;
newl++;
return merged;
}
int area_area(struct Map_info *In, int *field, struct Map_info *Tmp,
struct Map_info *Out, struct field_info *Fi,
dbDriver * driver, int operator, int *ofield,
ATTRIBUTES * attr, struct ilist *BList, double snap)
{
int ret, input, line, nlines, area, nareas;
int in_area, in_centr, out_cat;
struct line_pnts *Points;
struct line_cats *Cats;
CENTR *Centr;
char buf[1000];
dbString stmt;
int nmodif;
int verbose;
verbose = G_verbose();
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
/* optional snap */
if (snap > 0) {
int i, j, snapped_lines = 0;
struct bound_box box;
struct boxlist *boxlist = Vect_new_boxlist(0);
struct ilist *reflist = Vect_new_list();
G_message(_("Snapping boundaries with %g ..."), snap);
/* snap boundaries in B to boundaries in A,
* not modifying boundaries in A */
if (BList->n_values > 1)
qsort(BList->value, BList->n_values, sizeof(int), cmp_int);
snapped_lines = 0;
nlines = BList->n_values;
for (i = 0; i < nlines; i++) {
line = BList->value[i];
Vect_read_line(Tmp, Points, Cats, line);
/* select lines by box */
Vect_get_line_box(Tmp, line, &box);
box.E += snap;
box.W -= snap;
box.N += snap;
box.S -= snap;
box.T = 0.0;
box.B = 0.0;
Vect_select_lines_by_box(Tmp, &box, GV_BOUNDARY, boxlist);
if (boxlist->n_values > 0) {
Vect_reset_list(reflist);
for (j = 0; j < boxlist->n_values; j++) {
int aline = boxlist->id[j];
if (!bsearch(&aline, BList->value, BList->n_values,
sizeof(int), cmp_int)) {
G_ilist_add(reflist, aline);
}
}
/* snap bline to alines */
if (Vect_snap_line(Tmp, reflist, Points, snap, 0, NULL, NULL)) {
/* rewrite bline*/
Vect_delete_line(Tmp, line);
ret = Vect_write_line(Tmp, GV_BOUNDARY, Points, Cats);
G_ilist_add(BList, ret);
snapped_lines++;
G_debug(3, "line %d snapped", line);
}
}
}
Vect_destroy_boxlist(boxlist);
Vect_destroy_list(reflist);
G_verbose_message(n_("%d boundary snapped",
"%d boundaries snapped",
snapped_lines), snapped_lines);
}
/* same procedure like for v.in.ogr:
* Vect_clean_small_angles_at_nodes() can change the geometry so that new intersections
* are created. We must call Vect_break_lines(), Vect_remove_duplicates()
* and Vect_clean_small_angles_at_nodes() until no more small dangles are found */
do {
G_message(_("Breaking lines..."));
Vect_break_lines_list(Tmp, NULL, BList, GV_BOUNDARY, NULL);
/* Probably not necessary for LINE x AREA */
G_message(_("Removing duplicates..."));
Vect_remove_duplicates(Tmp, GV_BOUNDARY, NULL);
G_message(_("Cleaning boundaries at nodes..."));
nmodif =
Vect_clean_small_angles_at_nodes(Tmp, GV_BOUNDARY, NULL);
} while (nmodif > 0);
/* ?: May be result of Vect_break_lines() + Vect_remove_duplicates() any dangle or bridge?
* In that case, calls to Vect_remove_dangles() and Vect_remove_bridges() would be also necessary */
G_set_verbose(0);
/* should be fast, be silent */
Vect_build_partial(Tmp, GV_BUILD_AREAS);
G_set_verbose(verbose);
nlines = Vect_get_num_lines(Tmp);
ret = 0;
for (line = 1; line <= nlines; line++) {
if (!Vect_line_alive(Tmp, line))
continue;
if (Vect_get_line_type(Tmp, line) == GV_BOUNDARY) {
int left, rite;
Vect_get_line_areas(Tmp, line, &left, &rite);
if (left == 0 || rite == 0) {
/* invalid boundary */
ret = 1;
break;
}
}
}
if (ret) {
Vect_remove_dangles(Tmp, GV_BOUNDARY, -1, NULL);
Vect_remove_bridges(Tmp, NULL, NULL, NULL);
}
G_set_verbose(0);
Vect_build_partial(Tmp, GV_BUILD_NONE);
Vect_build_partial(Tmp, GV_BUILD_BASE);
G_set_verbose(verbose);
G_message(_("Merging lines..."));
Vect_merge_lines(Tmp, GV_BOUNDARY, NULL, NULL);
/* Attach islands */
G_message(_("Attaching islands..."));
/* can take some time, show messages */
Vect_build_partial(Tmp, GV_BUILD_ATTACH_ISLES);
/* Calculate new centroids for all areas */
nareas = Vect_get_num_areas(Tmp);
Centr = (CENTR *) G_malloc((nareas + 1) * sizeof(CENTR)); /* index from 1 ! */
for (area = 1; area <= nareas; area++) {
ret =
Vect_get_point_in_area(Tmp, area, &(Centr[area].x),
&(Centr[area].y));
if (ret < 0) {
G_warning(_("Cannot calculate area centroid"));
Centr[area].valid = 0;
}
else {
Centr[area].valid = 1;
}
}
/* Query input maps */
for (input = 0; input < 2; input++) {
G_message(_("Querying vector map <%s>..."),
Vect_get_full_name(&(In[input])));
for (area = 1; area <= nareas; area++) {
Centr[area].cat[input] = Vect_new_cats_struct();
G_percent(area, nareas, 1);
in_area =
Vect_find_area(&(In[input]), Centr[area].x, Centr[area].y);
if (in_area > 0) {
in_centr = Vect_get_area_centroid(&(In[input]), in_area);
if (in_centr > 0) {
int i;
Vect_read_line(&(In[input]), NULL, Cats, in_centr);
/* Add all cats with original field number */
for (i = 0; i < Cats->n_cats; i++) {
if (Cats->field[i] == field[input]) {
ATTR *at;
Vect_cat_set(Centr[area].cat[input], ofield[input + 1],
Cats->cat[i]);
/* Mark as used */
at = find_attr(&(attr[input]), Cats->cat[i]);
if (!at)
G_fatal_error(_("Attribute not found"));
at->used = 1;
}
}
}
}
}
}
G_message(_("Writing centroids..."));
db_init_string(&stmt);
out_cat = 1;
for (area = 1; area <= nareas; area++) {
int i;
G_percent(area, nareas, 1);
/* check the condition */
switch (operator) {
case OP_AND:
if (!
(Centr[area].cat[0]->n_cats > 0 &&
Centr[area].cat[1]->n_cats > 0))
continue;
break;
case OP_OR:
if (!
(Centr[area].cat[0]->n_cats > 0 ||
Centr[area].cat[1]->n_cats > 0))
continue;
break;
case OP_NOT:
if (!
(Centr[area].cat[0]->n_cats > 0 &&
!(Centr[area].cat[1]->n_cats > 0)))
continue;
break;
case OP_XOR:
if ((Centr[area].cat[0]->n_cats > 0 &&
Centr[area].cat[1]->n_cats > 0) ||
(!(Centr[area].cat[0]->n_cats > 0) &&
!(Centr[area].cat[1]->n_cats > 0)))
continue;
break;
}
Vect_reset_line(Points);
Vect_reset_cats(Cats);
Vect_append_point(Points, Centr[area].x, Centr[area].y, 0.0);
if (ofield[0] > 0) {
/* Add new cats for all combinations of input cats (-1 in cycle for null) */
for (i = -1; i < Centr[area].cat[0]->n_cats; i++) {
int j;
if (i == -1 && Centr[area].cat[0]->n_cats > 0)
continue; /* no need to make null */
for (j = -1; j < Centr[area].cat[1]->n_cats; j++) {
if (j == -1 && Centr[area].cat[1]->n_cats > 0)
continue; /* no need to make null */
if (ofield[0] > 0)
Vect_cat_set(Cats, ofield[0], out_cat);
/* attributes */
if (driver) {
ATTR *at;
sprintf(buf, "insert into %s values ( %d", Fi->table,
out_cat);
db_set_string(&stmt, buf);
/* cata */
if (i >= 0) {
if (attr[0].columns) {
at = find_attr(&(attr[0]),
Centr[area].cat[0]->cat[i]);
if (!at)
G_fatal_error(_("Attribute not found"));
if (at->values)
db_append_string(&stmt, at->values);
else
db_append_string(&stmt, attr[0].null_values);
}
else {
sprintf(buf, ", %d", Centr[area].cat[0]->cat[i]);
db_append_string(&stmt, buf);
}
}
else {
if (attr[0].columns) {
db_append_string(&stmt, attr[0].null_values);
}
else {
sprintf(buf, ", null");
db_append_string(&stmt, buf);
}
}
/* catb */
if (j >= 0) {
if (attr[1].columns) {
at = find_attr(&(attr[1]),
Centr[area].cat[1]->cat[j]);
if (!at)
G_fatal_error(_("Attribute not found"));
if (at->values)
db_append_string(&stmt, at->values);
else
db_append_string(&stmt, attr[1].null_values);
}
else {
sprintf(buf, ", %d", Centr[area].cat[1]->cat[j]);
db_append_string(&stmt, buf);
}
}
else {
if (attr[1].columns) {
db_append_string(&stmt, attr[1].null_values);
}
else {
sprintf(buf, ", null");
db_append_string(&stmt, buf);
}
}
db_append_string(&stmt, " )");
G_debug(3, "%s", db_get_string(&stmt));
if (db_execute_immediate(driver, &stmt) != DB_OK)
G_warning(_("Unable to insert new record: '%s'"),
db_get_string(&stmt));
}
out_cat++;
}
}
}
/* Add all cats from input vectors */
if (ofield[1] > 0 && field[0] > 0) {
for (i = 0; i < Centr[area].cat[0]->n_cats; i++) {
if (Centr[area].cat[0]->field[i] == field[0])
Vect_cat_set(Cats, ofield[1], Centr[area].cat[0]->cat[i]);
}
}
if (ofield[2] > 0 && field[1] > 0 && ofield[1] != ofield[2]) {
for (i = 0; i < Centr[area].cat[1]->n_cats; i++) {
if (Centr[area].cat[1]->field[i] == field[1])
Vect_cat_set(Cats, ofield[2], Centr[area].cat[1]->cat[i]);
}
}
Vect_write_line(Tmp, GV_CENTROID, Points, Cats);
Vect_write_line(Out, GV_CENTROID, Points, Cats);
}
G_set_verbose(0);
/* should be fast, be silent */
Vect_build_partial(Tmp, GV_BUILD_CENTROIDS);
G_set_verbose(verbose);
/* Copy valid boundaries to final output */
nlines = Vect_get_num_lines(Tmp);
for (line = 1; line <= nlines; line++) {
int i, ltype, side[2], centr[2];
G_percent(line, nlines, 1); /* must be before any continue */
if (!Vect_line_alive(Tmp, line))
continue;
ltype = Vect_read_line(Tmp, Points, Cats, line);
if (!(ltype & GV_BOUNDARY))
continue;
Vect_get_line_areas(Tmp, line, &side[0], &side[1]);
for (i = 0; i < 2; i++) {
if (side[i] == 0) { /* This should not happen ! */
centr[i] = 0;
continue;
}
if (side[i] > 0) {
area = side[i];
}
else { /* island */
area = Vect_get_isle_area(Tmp, abs(side[i]));
}
if (area > 0)
centr[i] = Vect_get_area_centroid(Tmp, area);
else
centr[i] = 0;
}
if (centr[0] || centr[1])
Vect_write_line(Out, GV_BOUNDARY, Points, Cats);
}
return 0;
}
int main(int argc, char *argv[])
{
struct Map_info In, Out, Buf;
struct line_pnts *Points;
struct line_cats *Cats, *BCats;
char bufname[GNAME_MAX];
struct GModule *module;
struct Option *in_opt, *out_opt, *type_opt, *dista_opt, *distb_opt,
*angle_opt;
struct Flag *straight_flag, *nocaps_flag;
struct Option *tol_opt, *bufcol_opt, *scale_opt, *field_opt;
int verbose;
double da, db, dalpha, tolerance, unit_tolerance;
int type;
int i, ret, nareas, area, nlines, line;
char *Areas, *Lines;
int field;
struct buf_contours *arr_bc;
struct buf_contours_pts arr_bc_pts;
int buffers_count = 0, line_id;
struct spatial_index si;
struct bound_box bbox;
/* Attributes if sizecol is used */
int nrec, ctype;
struct field_info *Fi;
dbDriver *Driver;
dbCatValArray cvarr;
double size_val, scale;
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("geometry"));
G_add_keyword(_("buffer"));
module->description =
_("Creates a buffer around vector features of given type.");
in_opt = G_define_standard_option(G_OPT_V_INPUT);
field_opt = G_define_standard_option(G_OPT_V_FIELD_ALL);
field_opt->guisection = _("Selection");
type_opt = G_define_standard_option(G_OPT_V_TYPE);
type_opt->options = "point,line,boundary,centroid,area";
type_opt->answer = "point,line,area";
type_opt->guisection = _("Selection");
out_opt = G_define_standard_option(G_OPT_V_OUTPUT);
dista_opt = G_define_option();
dista_opt->key = "distance";
dista_opt->type = TYPE_DOUBLE;
dista_opt->required = NO;
dista_opt->description =
_("Buffer distance along major axis in map units");
dista_opt->guisection = _("Distance");
distb_opt = G_define_option();
distb_opt->key = "minordistance";
distb_opt->type = TYPE_DOUBLE;
distb_opt->required = NO;
distb_opt->description =
_("Buffer distance along minor axis in map units");
distb_opt->guisection = _("Distance");
angle_opt = G_define_option();
angle_opt->key = "angle";
angle_opt->type = TYPE_DOUBLE;
angle_opt->required = NO;
angle_opt->answer = "0";
angle_opt->description = _("Angle of major axis in degrees");
angle_opt->guisection = _("Distance");
bufcol_opt = G_define_standard_option(G_OPT_DB_COLUMN);
bufcol_opt->key = "bufcolumn";
bufcol_opt->description =
_("Name of column to use for buffer distances");
bufcol_opt->guisection = _("Distance");
scale_opt = G_define_option();
scale_opt->key = "scale";
scale_opt->type = TYPE_DOUBLE;
scale_opt->required = NO;
scale_opt->answer = "1.0";
scale_opt->description = _("Scaling factor for attribute column values");
scale_opt->guisection = _("Distance");
tol_opt = G_define_option();
tol_opt->key = "tolerance";
tol_opt->type = TYPE_DOUBLE;
tol_opt->required = NO;
tol_opt->answer = "0.01";
tol_opt->description =
_("Maximum distance between theoretical arc and polygon segments as multiple of buffer");
tol_opt->guisection = _("Distance");
straight_flag = G_define_flag();
straight_flag->key = 's';
straight_flag->description = _("Make outside corners straight");
nocaps_flag = G_define_flag();
nocaps_flag->key = 'c';
nocaps_flag->description = _("Don't make caps at the ends of polylines");
G_gisinit(argv[0]);
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
type = Vect_option_to_types(type_opt);
if ((dista_opt->answer && bufcol_opt->answer) ||
(!(dista_opt->answer || bufcol_opt->answer)))
G_fatal_error(_("Select a buffer distance/minordistance/angle "
"or column, but not both."));
if (bufcol_opt->answer)
G_warning(_("The bufcol option may contain bugs during the cleaning "
"step. If you encounter problems, use the debug "
"option or clean manually with v.clean tool=break; "
"v.category step=0; v.extract -d type=area"));
if (field_opt->answer)
field = Vect_get_field_number(&In, field_opt->answer);
else
field = -1;
if (bufcol_opt->answer && field == -1)
G_fatal_error(_("The bufcol option requires a valid layer."));
tolerance = atof(tol_opt->answer);
if (tolerance <= 0)
G_fatal_error(_("The tolerance must be > 0."));
if (adjust_tolerance(&tolerance))
G_warning(_("The tolerance was reset to %g"), tolerance);
scale = atof(scale_opt->answer);
if (scale <= 0.0)
G_fatal_error("Illegal scale value");
da = db = dalpha = 0;
if (dista_opt->answer) {
da = atof(dista_opt->answer);
if (distb_opt->answer)
db = atof(distb_opt->answer);
else
db = da;
if (angle_opt->answer)
dalpha = atof(angle_opt->answer);
else
dalpha = 0;
unit_tolerance = tolerance * MIN(da, db);
G_verbose_message(_("The tolerance in map units = %g"), unit_tolerance);
}
Vect_check_input_output_name(in_opt->answer, out_opt->answer,
GV_FATAL_EXIT);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
BCats = Vect_new_cats_struct();
Vect_set_open_level(2); /* topology required */
if (1 > Vect_open_old2(&In, in_opt->answer, "", field_opt->answer))
G_fatal_error(_("Unable to open vector map <%s>"), in_opt->answer);
if (0 > Vect_open_new(&Out, out_opt->answer, WITHOUT_Z)) {
Vect_close(&In);
G_fatal_error(_("Unable to create vector map <%s>"), out_opt->answer);
}
/* open tmp vector for buffers, needed for cleaning */
sprintf(bufname, "%s_tmp_%d", out_opt->answer, getpid());
if (0 > Vect_open_new(&Buf, bufname, 0)) {
Vect_close(&In);
Vect_close(&Out);
Vect_delete(out_opt->answer);
exit(EXIT_FAILURE);
}
Vect_build_partial(&Buf, GV_BUILD_BASE);
/* check and load attribute column data */
if (bufcol_opt->answer) {
db_CatValArray_init(&cvarr);
Fi = Vect_get_field(&In, field);
if (Fi == NULL)
G_fatal_error(_("Database connection not defined for layer %d"),
field);
Driver = db_start_driver_open_database(Fi->driver, Fi->database);
if (Driver == NULL)
G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
Fi->database, Fi->driver);
/* Note do not check if the column exists in the table because it may be expression */
/* TODO: only select values we need instead of all in column */
nrec =
db_select_CatValArray(Driver, Fi->table, Fi->key,
bufcol_opt->answer, NULL, &cvarr);
if (nrec < 0)
G_fatal_error(_("Unable to select data from table <%s>"),
Fi->table);
G_debug(2, "%d records selected from table", nrec);
ctype = cvarr.ctype;
if (ctype != DB_C_TYPE_INT && ctype != DB_C_TYPE_DOUBLE)
G_fatal_error(_("Column type not supported"));
db_close_database_shutdown_driver(Driver);
/* Output cats/values list */
for (i = 0; i < cvarr.n_values; i++) {
if (ctype == DB_C_TYPE_INT) {
G_debug(4, "cat = %d val = %d", cvarr.value[i].cat,
cvarr.value[i].val.i);
}
else if (ctype == DB_C_TYPE_DOUBLE) {
G_debug(4, "cat = %d val = %f", cvarr.value[i].cat,
cvarr.value[i].val.d);
}
}
}
Vect_copy_head_data(&In, &Out);
Vect_hist_copy(&In, &Out);
Vect_hist_command(&Out);
/* Create buffers' boundaries */
nlines = nareas = 0;
if ((type & GV_POINTS) || (type & GV_LINES))
nlines += Vect_get_num_primitives(&In, type);
if (type & GV_AREA)
nareas = Vect_get_num_areas(&In);
if (nlines + nareas == 0) {
G_warning(_("No features available for buffering. "
"Check type option and features available in the input vector."));
exit(EXIT_SUCCESS);
}
buffers_count = 1;
arr_bc = G_malloc((nlines + nareas + 1) * sizeof(struct buf_contours));
Vect_spatial_index_init(&si, 0);
/* Lines (and Points) */
if ((type & GV_POINTS) || (type & GV_LINES)) {
int ltype;
if (nlines > 0)
G_message(_("Buffering lines..."));
for (line = 1; line <= nlines; line++) {
int cat;
G_debug(2, "line = %d", line);
G_percent(line, nlines, 2);
if (!Vect_line_alive(&In, line))
continue;
ltype = Vect_read_line(&In, Points, Cats, line);
if (!(ltype & type))
continue;
if (field > 0 && !Vect_cat_get(Cats, field, &cat))
continue;
if (bufcol_opt->answer) {
ret = db_CatValArray_get_value_di(&cvarr, cat, &size_val);
if (ret != DB_OK) {
G_warning(_("No record for category %d in table <%s>"),
cat, Fi->table);
continue;
}
if (size_val < 0.0) {
G_warning(_("Attribute is of invalid size (%.3f) for category %d"),
size_val, cat);
continue;
}
if (size_val == 0.0)
continue;
da = size_val * scale;
db = da;
dalpha = 0;
unit_tolerance = tolerance * MIN(da, db);
G_debug(2, " dynamic buffer size = %.2f", da);
G_debug(2, _("The tolerance in map units: %g"),
unit_tolerance);
}
Vect_line_prune(Points);
if (ltype & GV_POINTS || Points->n_points == 1) {
Vect_point_buffer2(Points->x[0], Points->y[0], da, db, dalpha,
!(straight_flag->answer), unit_tolerance,
&(arr_bc_pts.oPoints));
Vect_write_line(&Out, GV_BOUNDARY, arr_bc_pts.oPoints, BCats);
line_id = Vect_write_line(&Buf, GV_BOUNDARY, arr_bc_pts.oPoints, Cats);
Vect_destroy_line_struct(arr_bc_pts.oPoints);
/* add buffer to spatial index */
Vect_get_line_box(&Buf, line_id, &bbox);
Vect_spatial_index_add_item(&si, buffers_count, &bbox);
arr_bc[buffers_count].outer = line_id;
arr_bc[buffers_count].inner_count = 0;
arr_bc[buffers_count].inner = NULL;
buffers_count++;
}
else {
Vect_line_buffer2(Points, da, db, dalpha,
!(straight_flag->answer),
!(nocaps_flag->answer), unit_tolerance,
&(arr_bc_pts.oPoints),
&(arr_bc_pts.iPoints),
&(arr_bc_pts.inner_count));
Vect_write_line(&Out, GV_BOUNDARY, arr_bc_pts.oPoints, BCats);
line_id = Vect_write_line(&Buf, GV_BOUNDARY, arr_bc_pts.oPoints, Cats);
Vect_destroy_line_struct(arr_bc_pts.oPoints);
/* add buffer to spatial index */
Vect_get_line_box(&Buf, line_id, &bbox);
Vect_spatial_index_add_item(&si, buffers_count, &bbox);
arr_bc[buffers_count].outer = line_id;
arr_bc[buffers_count].inner_count = arr_bc_pts.inner_count;
if (arr_bc_pts.inner_count > 0) {
arr_bc[buffers_count].inner = G_malloc(arr_bc_pts.inner_count * sizeof(int));
for (i = 0; i < arr_bc_pts.inner_count; i++) {
Vect_write_line(&Out, GV_BOUNDARY, arr_bc_pts.iPoints[i], BCats);
line_id = Vect_write_line(&Buf, GV_BOUNDARY, arr_bc_pts.iPoints[i], Cats);
Vect_destroy_line_struct(arr_bc_pts.iPoints[i]);
/* add buffer to spatial index */
Vect_get_line_box(&Buf, line_id, &bbox);
Vect_spatial_index_add_item(&si, buffers_count, &bbox);
arr_bc[buffers_count].inner[i] = line_id;
}
G_free(arr_bc_pts.iPoints);
}
buffers_count++;
}
}
}
/* Areas */
if (type & GV_AREA) {
int centroid;
if (nareas > 0)
G_message(_("Buffering areas..."));
for (area = 1; area <= nareas; area++) {
int cat;
G_percent(area, nareas, 2);
if (!Vect_area_alive(&In, area))
continue;
centroid = Vect_get_area_centroid(&In, area);
if (centroid == 0)
continue;
Vect_read_line(&In, NULL, Cats, centroid);
if (field > 0 && !Vect_cat_get(Cats, field, &cat))
continue;
if (bufcol_opt->answer) {
ret = db_CatValArray_get_value_di(&cvarr, cat, &size_val);
if (ret != DB_OK) {
G_warning(_("No record for category %d in table <%s>"),
cat, Fi->table);
continue;
}
if (size_val < 0.0) {
G_warning(_("Attribute is of invalid size (%.3f) for category %d"),
size_val, cat);
continue;
}
if (size_val == 0.0)
continue;
da = size_val * scale;
db = da;
dalpha = 0;
unit_tolerance = tolerance * MIN(da, db);
G_debug(2, " dynamic buffer size = %.2f", da);
G_debug(2, _("The tolerance in map units: %g"),
unit_tolerance);
}
Vect_area_buffer2(&In, area, da, db, dalpha,
!(straight_flag->answer),
!(nocaps_flag->answer), unit_tolerance,
&(arr_bc_pts.oPoints),
&(arr_bc_pts.iPoints),
&(arr_bc_pts.inner_count));
Vect_write_line(&Out, GV_BOUNDARY, arr_bc_pts.oPoints, BCats);
line_id = Vect_write_line(&Buf, GV_BOUNDARY, arr_bc_pts.oPoints, Cats);
Vect_destroy_line_struct(arr_bc_pts.oPoints);
/* add buffer to spatial index */
Vect_get_line_box(&Buf, line_id, &bbox);
Vect_spatial_index_add_item(&si, buffers_count, &bbox);
arr_bc[buffers_count].outer = line_id;
arr_bc[buffers_count].inner_count = arr_bc_pts.inner_count;
if (arr_bc_pts.inner_count > 0) {
arr_bc[buffers_count].inner = G_malloc(arr_bc_pts.inner_count * sizeof(int));
for (i = 0; i < arr_bc_pts.inner_count; i++) {
Vect_write_line(&Out, GV_BOUNDARY, arr_bc_pts.iPoints[i], BCats);
line_id = Vect_write_line(&Buf, GV_BOUNDARY, arr_bc_pts.iPoints[i], Cats);
Vect_destroy_line_struct(arr_bc_pts.iPoints[i]);
/* add buffer to spatial index */
Vect_get_line_box(&Buf, line_id, &bbox);
Vect_spatial_index_add_item(&si, buffers_count, &bbox);
arr_bc[buffers_count].inner[i] = line_id;
}
G_free(arr_bc_pts.iPoints);
}
buffers_count++;
}
}
verbose = G_verbose();
G_message(_("Cleaning buffers..."));
/* Break lines */
G_message(_("Building parts of topology..."));
Vect_build_partial(&Out, GV_BUILD_BASE);
G_message(_("Snapping boundaries..."));
Vect_snap_lines(&Out, GV_BOUNDARY, 1e-7, NULL);
G_message(_("Breaking polygons..."));
Vect_break_polygons(&Out, GV_BOUNDARY, NULL);
G_message(_("Removing duplicates..."));
Vect_remove_duplicates(&Out, GV_BOUNDARY, NULL);
do {
G_message(_("Breaking boundaries..."));
Vect_break_lines(&Out, GV_BOUNDARY, NULL);
G_message(_("Removing duplicates..."));
Vect_remove_duplicates(&Out, GV_BOUNDARY, NULL);
G_message(_("Cleaning boundaries at nodes"));
} while (Vect_clean_small_angles_at_nodes(&Out, GV_BOUNDARY, NULL) > 0);
/* Dangles and bridges don't seem to be necessary if snapping is small enough. */
/* Still needed for larger buffer distances ? */
/*
G_message(_("Removing dangles..."));
Vect_remove_dangles(&Out, GV_BOUNDARY, -1, NULL);
G_message (_("Removing bridges..."));
Vect_remove_bridges(&Out, NULL);
*/
G_message(_("Attaching islands..."));
Vect_build_partial(&Out, GV_BUILD_ATTACH_ISLES);
/* Calculate new centroids for all areas */
nareas = Vect_get_num_areas(&Out);
Areas = (char *)G_calloc(nareas + 1, sizeof(char));
G_message(_("Calculating centroids for areas..."));
G_percent(0, nareas, 2);
for (area = 1; area <= nareas; area++) {
double x, y;
G_percent(area, nareas, 2);
G_debug(3, "area = %d", area);
if (!Vect_area_alive(&Out, area))
continue;
ret = Vect_get_point_in_area(&Out, area, &x, &y);
if (ret < 0) {
G_warning(_("Cannot calculate area centroid"));
continue;
}
ret = point_in_buffer(arr_bc, &si, &Buf, x, y);
if (ret) {
G_debug(3, " -> in buffer");
Areas[area] = 1;
}
}
/* Make a list of boundaries to be deleted (both sides inside) */
nlines = Vect_get_num_lines(&Out);
G_debug(3, "nlines = %d", nlines);
Lines = (char *)G_calloc(nlines + 1, sizeof(char));
G_message(_("Generating list of boundaries to be deleted..."));
for (line = 1; line <= nlines; line++) {
int j, side[2], areas[2];
G_percent(line, nlines, 2);
G_debug(3, "line = %d", line);
if (!Vect_line_alive(&Out, line))
continue;
Vect_get_line_areas(&Out, line, &side[0], &side[1]);
for (j = 0; j < 2; j++) {
if (side[j] == 0) { /* area/isle not build */
areas[j] = 0;
}
else if (side[j] > 0) { /* area */
areas[j] = side[j];
}
else { /* < 0 -> island */
areas[j] = Vect_get_isle_area(&Out, abs(side[j]));
}
}
G_debug(3, " areas = %d , %d -> Areas = %d, %d", areas[0], areas[1],
Areas[areas[0]], Areas[areas[1]]);
if (Areas[areas[0]] && Areas[areas[1]])
Lines[line] = 1;
}
G_free(Areas);
/* Delete boundaries */
G_message(_("Deleting boundaries..."));
for (line = 1; line <= nlines; line++) {
G_percent(line, nlines, 2);
if (!Vect_line_alive(&Out, line))
continue;
if (Lines[line]) {
G_debug(3, " delete line %d", line);
Vect_delete_line(&Out, line);
}
else {
/* delete incorrect boundaries */
int side[2];
Vect_get_line_areas(&Out, line, &side[0], &side[1]);
if (!side[0] && !side[1])
Vect_delete_line(&Out, line);
}
}
G_free(Lines);
/* Create new centroids */
Vect_reset_cats(Cats);
Vect_cat_set(Cats, 1, 1);
nareas = Vect_get_num_areas(&Out);
G_message(_("Calculating centroids for areas..."));
for (area = 1; area <= nareas; area++) {
double x, y;
G_percent(area, nareas, 2);
G_debug(3, "area = %d", area);
if (!Vect_area_alive(&Out, area))
continue;
ret = Vect_get_point_in_area(&Out, area, &x, &y);
if (ret < 0) {
G_warning(_("Cannot calculate area centroid"));
continue;
}
ret = point_in_buffer(arr_bc, &si, &Buf, x, y);
if (ret) {
Vect_reset_line(Points);
Vect_append_point(Points, x, y, 0.);
Vect_write_line(&Out, GV_CENTROID, Points, Cats);
}
}
/* free arr_bc[] */
/* will only slow down the module
for (i = 0; i < buffers_count; i++) {
Vect_destroy_line_struct(arr_bc[i].oPoints);
for (j = 0; j < arr_bc[i].inner_count; j++)
Vect_destroy_line_struct(arr_bc[i].iPoints[j]);
G_free(arr_bc[i].iPoints);
} */
Vect_spatial_index_destroy(&si);
Vect_close(&Buf);
Vect_delete(bufname);
G_set_verbose(verbose);
Vect_close(&In);
Vect_build_partial(&Out, GV_BUILD_NONE);
Vect_build(&Out);
Vect_close(&Out);
exit(EXIT_SUCCESS);
}
/* break polygons using a memory-based search index */
void Vect_break_polygons_mem(struct Map_info *Map, int type, struct Map_info *Err)
{
struct line_pnts *BPoints, *Points;
struct line_cats *Cats, *ErrCats;
int i, j, k, ret, ltype, broken, last, nlines;
int nbreaks;
struct RB_TREE *RBTree;
int npoints, nallpoints, nmarks;
XPNT *XPnt_found, XPnt_search;
double dx, dy, a1 = 0, a2 = 0;
int closed, last_point, cross;
G_debug(1, "Memory-based version of Vect_break_polygons()");
RBTree = rbtree_create(compare_xpnts, sizeof(XPNT));
BPoints = Vect_new_line_struct();
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
ErrCats = Vect_new_cats_struct();
nlines = Vect_get_num_lines(Map);
G_debug(3, "nlines = %d", nlines);
/* Go through all lines in vector, and add each point to structure of points,
* if such point already exists check angles of segments and if differ mark for break */
nmarks = 0;
npoints = 0;
nallpoints = 0;
XPnt_search.used = 0;
G_message(_("Breaking polygons (pass 1: select break points)..."));
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 1);
G_debug(3, "i = %d", i);
if (!Vect_line_alive(Map, i))
continue;
ltype = Vect_read_line(Map, Points, Cats, i);
if (!(ltype & type))
continue;
/* This would be confused by duplicate coordinates (angle cannot be calculated) ->
* prune line first */
Vect_line_prune(Points);
/* If first and last point are identical it is close polygon, we don't need to register last point
* and we can calculate angle for first.
* If first and last point are not identical we have to mark for break both */
last_point = Points->n_points - 1;
if (Points->x[0] == Points->x[last_point] &&
Points->y[0] == Points->y[last_point])
closed = 1;
else
closed = 0;
for (j = 0; j < Points->n_points; j++) {
G_debug(3, "j = %d", j);
nallpoints++;
if (j == last_point && closed)
continue; /* do not register last of close polygon */
XPnt_search.x = Points->x[j];
XPnt_search.y = Points->y[j];
/* Already in DB? */
XPnt_found = rbtree_find(RBTree, &XPnt_search);
if (Points->n_points <= 2 ||
(!closed && (j == 0 || j == last_point))) {
cross = 1; /* mark for cross in any case */
}
else { /* calculate angles */
cross = 0;
if (j == 0 && closed) { /* closed polygon */
dx = Points->x[last_point] - Points->x[0];
dy = Points->y[last_point] - Points->y[0];
a1 = atan2(dy, dx);
dx = Points->x[1] - Points->x[0];
dy = Points->y[1] - Points->y[0];
a2 = atan2(dy, dx);
}
else {
dx = Points->x[j - 1] - Points->x[j];
dy = Points->y[j - 1] - Points->y[j];
a1 = atan2(dy, dx);
dx = Points->x[j + 1] - Points->x[j];
dy = Points->y[j + 1] - Points->y[j];
a2 = atan2(dy, dx);
}
}
if (XPnt_found) { /* found */
if (XPnt_found->cross == 1)
continue; /* already marked */
/* check angles */
if (cross) {
XPnt_found->cross = 1;
nmarks++;
}
else {
G_debug(3, "a1 = %f xa1 = %f a2 = %f xa2 = %f", a1,
XPnt_found->a1, a2, XPnt_found->a2);
if ((a1 == XPnt_found->a1 && a2 == XPnt_found->a2) ||
(a1 == XPnt_found->a2 && a2 == XPnt_found->a1)) { /* identical */
}
else {
XPnt_found->cross = 1;
nmarks++;
}
}
}
else {
if (j == 0 || j == (Points->n_points - 1) ||
Points->n_points < 3) {
XPnt_search.a1 = 0;
XPnt_search.a2 = 0;
XPnt_search.cross = 1;
nmarks++;
}
else {
XPnt_search.a1 = a1;
XPnt_search.a2 = a2;
XPnt_search.cross = 0;
}
/* Add to tree */
rbtree_insert(RBTree, &XPnt_search);
npoints++;
}
}
}
nbreaks = 0;
nallpoints = 0;
G_debug(2, "Break polygons: unique vertices: %ld", (long int)RBTree->count);
/* uncomment to check if search tree is healthy */
/* if (rbtree_debug(RBTree, RBTree->root) == 0)
G_warning("Break polygons: RBTree not ok"); */
/* Second loop through lines (existing when loop is started, no need to process lines written again)
* and break at points marked for break */
G_message(_("Breaking polygons (pass 2: break at selected points)..."));
for (i = 1; i <= nlines; i++) {
int n_orig_points;
G_percent(i, nlines, 1);
G_debug(3, "i = %d", i);
if (!Vect_line_alive(Map, i))
continue;
ltype = Vect_read_line(Map, Points, Cats, i);
if (!(ltype & type))
continue;
if (!(ltype & GV_LINES))
continue; /* Nonsense to break points */
/* Duplicates would result in zero length lines -> prune line first */
n_orig_points = Points->n_points;
Vect_line_prune(Points);
broken = 0;
last = 0;
G_debug(3, "n_points = %d", Points->n_points);
for (j = 1; j < Points->n_points; j++) {
G_debug(3, "j = %d", j);
nallpoints++;
if (Points->n_points <= 1 ||
(j == (Points->n_points - 1) && !broken))
break;
/* One point only or
* last point and line is not broken, do nothing */
XPnt_search.x = Points->x[j];
XPnt_search.y = Points->y[j];
XPnt_found = rbtree_find(RBTree, &XPnt_search);
/* all points must be in the search tree, without duplicates */
if (XPnt_found == NULL)
G_fatal_error(_("Point not in search tree!"));
/* break or write last segment of broken line */
if ((j == (Points->n_points - 1) && broken) ||
XPnt_found->cross) {
Vect_reset_line(BPoints);
for (k = last; k <= j; k++) {
Vect_append_point(BPoints, Points->x[k], Points->y[k],
Points->z[k]);
}
/* Result may collapse to one point */
Vect_line_prune(BPoints);
if (BPoints->n_points > 1) {
ret = Vect_write_line(Map, ltype, BPoints, Cats);
G_debug(3,
"Line %d written j = %d n_points(orig,pruned) = %d n_points(new) = %d",
ret, j, Points->n_points, BPoints->n_points);
}
if (!broken)
Vect_delete_line(Map, i); /* not yet deleted */
/* Write points on breaks */
if (Err) {
if (XPnt_found->cross && !XPnt_found->used) {
Vect_reset_line(BPoints);
Vect_append_point(BPoints, Points->x[j], Points->y[j], 0);
Vect_write_line(Err, GV_POINT, BPoints, ErrCats);
}
XPnt_found->used = 1;
}
last = j;
broken = 1;
nbreaks++;
}
}
if (!broken && n_orig_points > Points->n_points) { /* was pruned before -> rewrite */
if (Points->n_points > 1) {
Vect_rewrite_line(Map, i, ltype, Points, Cats);
G_debug(3, "Line %d pruned, npoints = %d", i,
Points->n_points);
}
else {
Vect_delete_line(Map, i);
G_debug(3, "Line %d was deleted", i);
}
}
else {
G_debug(3, "Line %d was not changed", i);
}
}
rbtree_destroy(RBTree);
Vect_destroy_line_struct(Points);
Vect_destroy_line_struct(BPoints);
Vect_destroy_cats_struct(Cats);
G_verbose_message(_("Breaks: %d"), nbreaks);
}
/* break polygons using a file-based search index */
void Vect_break_polygons_file(struct Map_info *Map, int type, struct Map_info *Err)
{
struct line_pnts *BPoints, *Points;
struct line_cats *Cats, *ErrCats;
int i, j, k, ret, ltype, broken, last, nlines;
int nbreaks;
struct RTree *RTree;
int npoints, nallpoints, nmarks;
XPNT2 XPnt;
double dx, dy, a1 = 0, a2 = 0;
int closed, last_point;
char cross;
int fd, xpntfd;
char *filename;
static struct RTree_Rect rect;
static int rect_init = 0;
if (!rect_init) {
rect.boundary = G_malloc(6 * sizeof(RectReal));
rect_init = 6;
}
G_debug(1, "File-based version of Vect_break_polygons()");
filename = G_tempfile();
fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
RTree = RTreeCreateTree(fd, 0, 2);
remove(filename);
filename = G_tempfile();
xpntfd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
remove(filename);
BPoints = Vect_new_line_struct();
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
ErrCats = Vect_new_cats_struct();
nlines = Vect_get_num_lines(Map);
G_debug(3, "nlines = %d", nlines);
/* Go through all lines in vector, and add each point to structure of points,
* if such point already exists check angles of segments and if differ mark for break */
nmarks = 0;
npoints = 1; /* index starts from 1 ! */
nallpoints = 0;
XPnt.used = 0;
G_message(_("Breaking polygons (pass 1: select break points)..."));
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 1);
G_debug(3, "i = %d", i);
if (!Vect_line_alive(Map, i))
continue;
ltype = Vect_read_line(Map, Points, Cats, i);
if (!(ltype & type))
continue;
/* This would be confused by duplicate coordinates (angle cannot be calculated) ->
* prune line first */
Vect_line_prune(Points);
/* If first and last point are identical it is close polygon, we don't need to register last point
* and we can calculate angle for first.
* If first and last point are not identical we have to mark for break both */
last_point = Points->n_points - 1;
if (Points->x[0] == Points->x[last_point] &&
Points->y[0] == Points->y[last_point])
closed = 1;
else
closed = 0;
for (j = 0; j < Points->n_points; j++) {
G_debug(3, "j = %d", j);
nallpoints++;
if (j == last_point && closed)
continue; /* do not register last of close polygon */
/* Box */
rect.boundary[0] = Points->x[j];
rect.boundary[3] = Points->x[j];
rect.boundary[1] = Points->y[j];
rect.boundary[4] = Points->y[j];
rect.boundary[2] = 0;
rect.boundary[5] = 0;
/* Already in DB? */
fpoint = -1;
RTreeSearch(RTree, &rect, (void *)srch, NULL);
G_debug(3, "fpoint = %d", fpoint);
if (Points->n_points <= 2 ||
(!closed && (j == 0 || j == last_point))) {
cross = 1; /* mark for cross in any case */
}
else { /* calculate angles */
cross = 0;
if (j == 0 && closed) { /* closed polygon */
dx = Points->x[last_point] - Points->x[0];
dy = Points->y[last_point] - Points->y[0];
a1 = atan2(dy, dx);
dx = Points->x[1] - Points->x[0];
dy = Points->y[1] - Points->y[0];
a2 = atan2(dy, dx);
}
else {
dx = Points->x[j - 1] - Points->x[j];
dy = Points->y[j - 1] - Points->y[j];
a1 = atan2(dy, dx);
dx = Points->x[j + 1] - Points->x[j];
dy = Points->y[j + 1] - Points->y[j];
a2 = atan2(dy, dx);
}
}
if (fpoint > 0) { /* Found */
/* read point */
lseek(xpntfd, (off_t) (fpoint - 1) * sizeof(XPNT2), SEEK_SET);
read(xpntfd, &XPnt, sizeof(XPNT2));
if (XPnt.cross == 1)
continue; /* already marked */
/* Check angles */
if (cross) {
XPnt.cross = 1;
nmarks++;
/* write point */
lseek(xpntfd, (off_t) (fpoint - 1) * sizeof(XPNT2), SEEK_SET);
write(xpntfd, &XPnt, sizeof(XPNT2));
}
else {
G_debug(3, "a1 = %f xa1 = %f a2 = %f xa2 = %f", a1,
XPnt.a1, a2, XPnt.a2);
if ((a1 == XPnt.a1 && a2 == XPnt.a2) ||
(a1 == XPnt.a2 && a2 == XPnt.a1)) { /* identical */
}
else {
XPnt.cross = 1;
nmarks++;
/* write point */
lseek(xpntfd, (off_t) (fpoint - 1) * sizeof(XPNT2), SEEK_SET);
write(xpntfd, &XPnt, sizeof(XPNT2));
}
}
}
else {
/* Add to tree and to structure */
RTreeInsertRect(&rect, npoints, RTree);
if (j == 0 || j == (Points->n_points - 1) ||
Points->n_points < 3) {
XPnt.a1 = 0;
XPnt.a2 = 0;
XPnt.cross = 1;
nmarks++;
}
else {
XPnt.a1 = a1;
XPnt.a2 = a2;
XPnt.cross = 0;
}
/* write point */
lseek(xpntfd, (off_t) (npoints - 1) * sizeof(XPNT2), SEEK_SET);
write(xpntfd, &XPnt, sizeof(XPNT2));
npoints++;
}
}
}
nbreaks = 0;
/* Second loop through lines (existing when loop is started, no need to process lines written again)
* and break at points marked for break */
G_message(_("Breaking polygons (pass 2: break at selected points)..."));
for (i = 1; i <= nlines; i++) {
int n_orig_points;
G_percent(i, nlines, 1);
G_debug(3, "i = %d", i);
if (!Vect_line_alive(Map, i))
continue;
ltype = Vect_read_line(Map, Points, Cats, i);
if (!(ltype & type))
continue;
if (!(ltype & GV_LINES))
continue; /* Nonsense to break points */
/* Duplicates would result in zero length lines -> prune line first */
n_orig_points = Points->n_points;
Vect_line_prune(Points);
broken = 0;
last = 0;
G_debug(3, "n_points = %d", Points->n_points);
for (j = 1; j < Points->n_points; j++) {
G_debug(3, "j = %d", j);
nallpoints++;
/* Box */
rect.boundary[0] = Points->x[j];
rect.boundary[3] = Points->x[j];
rect.boundary[1] = Points->y[j];
rect.boundary[4] = Points->y[j];
rect.boundary[2] = 0;
rect.boundary[5] = 0;
if (Points->n_points <= 1 ||
(j == (Points->n_points - 1) && !broken))
break;
/* One point only or
* last point and line is not broken, do nothing */
RTreeSearch(RTree, &rect, (void *)srch, 0);
G_debug(3, "fpoint = %d", fpoint);
/* read point */
lseek(xpntfd, (off_t) (fpoint - 1) * sizeof(XPNT2), SEEK_SET);
read(xpntfd, &XPnt, sizeof(XPNT2));
/* break or write last segment of broken line */
if ((j == (Points->n_points - 1) && broken) ||
XPnt.cross) {
Vect_reset_line(BPoints);
for (k = last; k <= j; k++) {
Vect_append_point(BPoints, Points->x[k], Points->y[k],
Points->z[k]);
}
/* Result may collapse to one point */
Vect_line_prune(BPoints);
if (BPoints->n_points > 1) {
ret = Vect_write_line(Map, ltype, BPoints, Cats);
G_debug(3,
"Line %d written j = %d n_points(orig,pruned) = %d n_points(new) = %d",
ret, j, Points->n_points, BPoints->n_points);
}
if (!broken)
Vect_delete_line(Map, i); /* not yet deleted */
/* Write points on breaks */
if (Err) {
if (XPnt.cross && !XPnt.used) {
Vect_reset_line(BPoints);
Vect_append_point(BPoints, Points->x[j], Points->y[j], 0);
Vect_write_line(Err, GV_POINT, BPoints, ErrCats);
}
if (!XPnt.used) {
XPnt.used = 1;
/* write point */
lseek(xpntfd, (off_t) (fpoint - 1) * sizeof(XPNT2), SEEK_SET);
write(xpntfd, &XPnt, sizeof(XPNT2));
}
}
last = j;
broken = 1;
nbreaks++;
}
}
if (!broken && n_orig_points > Points->n_points) { /* was pruned before -> rewrite */
if (Points->n_points > 1) {
Vect_rewrite_line(Map, i, ltype, Points, Cats);
G_debug(3, "Line %d pruned, npoints = %d", i,
Points->n_points);
}
else {
Vect_delete_line(Map, i);
G_debug(3, "Line %d was deleted", i);
}
}
else {
G_debug(3, "Line %d was not changed", i);
}
}
close(RTree->fd);
RTreeDestroyTree(RTree);
close(xpntfd);
Vect_destroy_line_struct(Points);
Vect_destroy_line_struct(BPoints);
Vect_destroy_cats_struct(Cats);
Vect_destroy_cats_struct(ErrCats);
G_verbose_message(_("Breaks: %d"), nbreaks);
}
/*
Called by Vect_remove_bridges() and Vect_chtype_bridges():
chtype = 0 -> works like Vect_remove_bridges()
chtype = 1 -> works like Vect_chtype_bridges()
Algorithm: Go thorough all lines,
if both sides of the line have left and side 0 (candidate) do this check:
follow adjacent lines in one direction (nearest to the right at the end node),
if we reach this line again without dangle in the way, but with this line
traversed from other side it is a bridge.
List of all lines in chain is created during the cycle.
*/
void
remove_bridges(struct Map_info *Map, int chtype, struct Map_info *Err)
{
int i, type, nlines, line;
int left, right, node1, node2, current_line, next_line;
int bridges_removed = 0; /* number of removed bridges */
int lines_removed = 0; /* number of lines removed */
char *lmsg;
struct Plus_head *Plus;
struct line_pnts *Points;
struct line_cats *Cats;
struct ilist *CycleList;
struct ilist *BridgeList;
int dangle, other_side;
if (chtype)
lmsg = "changed lines";
else
lmsg = "removed lines";
Plus = &(Map->plus);
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
CycleList = Vect_new_list();
BridgeList = Vect_new_list();
nlines = Vect_get_num_lines(Map);
G_debug(1, "nlines = %d", nlines);
for (line = 1; line <= nlines; line++) {
G_percent(line, nlines, 1);
if (!Vect_line_alive(Map, line))
continue;
type = Vect_read_line(Map, NULL, NULL, line);
if (!(type & GV_BOUNDARY))
continue;
Vect_get_line_areas(Map, line, &left, &right);
if (left != 0 || right != 0)
continue; /* Cannot be bridge */
G_debug(2, "line %d - bridge candidate", line);
Vect_get_line_nodes(Map, line, &node1, &node2);
if (abs(node1) == abs(node2))
continue; /* either zero length or loop -> cannot be a bridge */
current_line = -line; /* we start with negative (go forward, node2 ) */
dangle = 0;
other_side = 0;
Vect_reset_list(CycleList);
Vect_reset_list(BridgeList);
while (1) {
next_line =
dig_angle_next_line(Plus, current_line, GV_RIGHT,
GV_BOUNDARY);
/* Add this line to the list */
/* TODO: Vect_val_in_list() and Vect_list_append() behave O(n)
* change to O(log n) */
if (Vect_val_in_list(CycleList, abs(next_line))) /* other side -> bridge chain */
Vect_list_append(BridgeList, abs(next_line));
else
dig_list_add(CycleList, abs(next_line)); /* not in list, can add new line fast */
if (abs(next_line) == abs(current_line)) {
G_debug(4, " dangle -> no bridge");
dangle = 1;
break;
}
if (abs(next_line) == line) { /* start line reached */
/* which side */
if (next_line < 0) { /* other side (connected by node 2) */
G_debug(5, " other side reached");
other_side = 1;
}
else { /* start side */
break;
}
}
current_line = -next_line; /* change the sign to look at the next node in following cycle */
}
if (!dangle && other_side) {
G_debug(3, " line %d is part of bridge chain", line);
for (i = 0; i < BridgeList->n_values; i++) {
Vect_read_line(Map, Points, Cats, BridgeList->value[i]);
if (Err) {
Vect_write_line(Err, GV_BOUNDARY, Points, Cats);
}
if (!chtype)
Vect_delete_line(Map, BridgeList->value[i]);
else
Vect_rewrite_line(Map, BridgeList->value[i], GV_LINE,
Points, Cats);
lines_removed++;
}
bridges_removed++;
}
}
G_verbose_message("Removed lines: %d", lines_removed);
G_verbose_message("Removed bridges: %d", bridges_removed);
}
/*!
\brief Remove duplicate features from vector map.
Remove duplicate lines of given types from vector map. Duplicate
lines may be optionally written to error map. Input map must be
opened on level 2 for update. Categories are merged.
GV_BUILD_BASE is sufficient.
\param[in,out] Map vector map where duplicate lines will be deleted
\param type type of line to be delete
\param[out] Err vector map where duplicate lines will be written or NULL
\return void
*/
void
Vect_remove_duplicates(struct Map_info *Map, int type, struct Map_info *Err)
{
struct line_pnts *APoints, *BPoints;
struct line_cats *ACats, *BCats, *Cats;
int i, j, c, atype, btype, bline;
int nlines, nbcats_orig;
struct bound_box ABox;
struct boxlist *List;
int ndupl;
APoints = Vect_new_line_struct();
BPoints = Vect_new_line_struct();
ACats = Vect_new_cats_struct();
BCats = Vect_new_cats_struct();
Cats = Vect_new_cats_struct();
List = Vect_new_boxlist(0);
nlines = Vect_get_num_lines(Map);
G_debug(1, "nlines = %d", nlines);
/* Go through all lines in vector, for each select lines which overlap MBR of
* this line and check if some of them is identical. If someone is identical
* remove current line. (In each step just one line is deleted)
*/
ndupl = 0;
for (i = 1; i <= nlines; i++) {
G_percent(i, nlines, 1);
if (!Vect_line_alive(Map, i))
continue;
atype = Vect_read_line(Map, APoints, ACats, i);
if (!(atype & type))
continue;
Vect_line_box(APoints, &ABox);
Vect_select_lines_by_box(Map, &ABox, type, List);
G_debug(3, " %d lines selected by box", List->n_values);
for (j = 0; j < List->n_values; j++) {
bline = List->id[j];
G_debug(3, " j = %d bline = %d", j, bline);
if (i == bline)
continue;
btype = Vect_read_line(Map, BPoints, BCats, bline);
/* check for duplicates */
if (!Vect_line_check_duplicate(APoints, BPoints, Vect_is_3d(Map)))
continue;
/* Lines area identical -> remove current */
if (Err) {
Vect_write_line(Err, atype, APoints, ACats);
}
Vect_delete_line(Map, i);
/* Merge categories */
nbcats_orig = BCats->n_cats;
for (c = 0; c < ACats->n_cats; c++)
Vect_cat_set(BCats, ACats->field[c], ACats->cat[c]);
if (BCats->n_cats > nbcats_orig) {
G_debug(4, "cats merged: n_cats %d -> %d", nbcats_orig,
BCats->n_cats);
Vect_rewrite_line(Map, bline, btype, BPoints, BCats);
}
ndupl++;
break; /* line was deleted -> take the next one */
}
nlines = Vect_get_num_lines(Map); /* For future when lines with cats will be rewritten */
G_debug(3, "nlines = %d\n", nlines);
}
G_verbose_message("Removed duplicates: %d", ndupl);
}
int main(int argc, char **argv)
{
int i;
int **cats, *ncats, nfields, *fields;
struct Flag *line_flag;
/* struct Flag *all_flag; */
struct Option *in_opt, *out_opt;
struct Flag *table_flag;
struct GModule *module;
struct line_pnts *Points;
struct line_cats *Cats;
int node, nnodes;
COOR *coor;
int ncoor, acoor;
int line, nlines, type, ctype, area, nareas;
int err_boundaries, err_centr_out, err_centr_dupl, err_nocentr;
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("vector"));
G_add_keyword(_("geometry"));
G_add_keyword(_("triangulation"));
module->description = _("Creates a Voronoi diagram from an input vector "
"map containing points or centroids.");
in_opt = G_define_standard_option(G_OPT_V_INPUT);
out_opt = G_define_standard_option(G_OPT_V_OUTPUT);
/*
all_flag = G_define_flag ();
all_flag->key = 'a';
all_flag->description = _("Use all points (do not limit to current region)");
*/
line_flag = G_define_flag();
line_flag->key = 'l';
line_flag->description =
_("Output tessellation as a graph (lines), not areas");
table_flag = G_define_flag();
table_flag->key = 't';
table_flag->description = _("Do not create attribute table");
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
if (line_flag->answer)
Type = GV_LINE;
else
Type = GV_BOUNDARY;
All = 0;
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
/* open files */
Vect_set_open_level(2);
Vect_open_old(&In, in_opt->answer, "");
if (Vect_open_new(&Out, out_opt->answer, 0) < 0)
G_fatal_error(_("Unable to create vector map <%s>"), out_opt->answer);
Vect_hist_copy(&In, &Out);
Vect_hist_command(&Out);
/* initialize working region */
G_get_window(&Window);
Vect_region_box(&Window, &Box);
Box.T = 0.5;
Box.B = -0.5;
freeinit(&sfl, sizeof(struct Site));
G_message(_("Reading sites..."));
readsites();
siteidx = 0;
geominit();
triangulate = 0;
plot = 0;
debug = 0;
G_message(_("Voronoi triangulation..."));
voronoi(triangulate, nextone);
/* Close free ends by current region */
Vect_build_partial(&Out, GV_BUILD_BASE);
ncoor = 0;
acoor = 100;
coor = (COOR *) G_malloc(sizeof(COOR) * acoor);
nnodes = Vect_get_num_nodes(&Out);
for (node = 1; node <= nnodes; node++) {
double x, y;
if (Vect_get_node_n_lines(&Out, node) < 2) { /* add coordinates */
Vect_get_node_coor(&Out, node, &x, &y, NULL);
if (ncoor == acoor - 5) { /* always space for 5 region corners */
acoor += 100;
coor = (COOR *) G_realloc(coor, sizeof(COOR) * acoor);
}
coor[ncoor].x = x;
coor[ncoor].y = y;
ncoor++;
}
}
/* Add region corners */
coor[ncoor].x = Box.W;
coor[ncoor].y = Box.S;
ncoor++;
coor[ncoor].x = Box.E;
coor[ncoor].y = Box.S;
ncoor++;
coor[ncoor].x = Box.E;
coor[ncoor].y = Box.N;
ncoor++;
coor[ncoor].x = Box.W;
coor[ncoor].y = Box.N;
ncoor++;
/* Sort */
qsort(coor, ncoor, sizeof(COOR), (void *)cmp);
/* add last (first corner) */
coor[ncoor].x = Box.W;
coor[ncoor].y = Box.S;
ncoor++;
for (i = 1; i < ncoor; i++) {
if (coor[i].x == coor[i - 1].x && coor[i].y == coor[i - 1].y)
continue; /* duplicate */
Vect_reset_line(Points);
Vect_append_point(Points, coor[i].x, coor[i].y, 0.0);
Vect_append_point(Points, coor[i - 1].x, coor[i - 1].y, 0.0);
Vect_write_line(&Out, Type, Points, Cats);
}
G_free(coor);
/* Copy input points as centroids */
nfields = Vect_cidx_get_num_fields(&In);
cats = (int **)G_malloc(nfields * sizeof(int *));
ncats = (int *)G_malloc(nfields * sizeof(int));
fields = (int *)G_malloc(nfields * sizeof(int));
for (i = 0; i < nfields; i++) {
ncats[i] = 0;
cats[i] =
(int *)G_malloc(Vect_cidx_get_num_cats_by_index(&In, i) *
sizeof(int));
fields[i] = Vect_cidx_get_field_number(&In, i);
}
if (line_flag->answer)
ctype = GV_POINT;
else
ctype = GV_CENTROID;
nlines = Vect_get_num_lines(&In);
G_message(_("Writing sites to output..."));
for (line = 1; line <= nlines; line++) {
G_percent(line, nlines, 2);
type = Vect_read_line(&In, Points, Cats, line);
if (!(type & GV_POINTS))
continue;
if (!Vect_point_in_box(Points->x[0], Points->y[0], 0.0, &Box))
continue;
Vect_write_line(&Out, ctype, Points, Cats);
for (i = 0; i < Cats->n_cats; i++) {
int f, j;
f = -1;
for (j = 0; j < nfields; j++) { /* find field */
if (fields[j] == Cats->field[i]) {
f = j;
break;
}
}
if (f > -1) {
cats[f][ncats[f]] = Cats->cat[i];
ncats[f]++;
}
}
}
/* Copy tables */
if (!(table_flag->answer)) {
int ttype, ntabs = 0;
struct field_info *IFi, *OFi;
/* Number of output tabs */
for (i = 0; i < Vect_get_num_dblinks(&In); i++) {
int f, j;
IFi = Vect_get_dblink(&In, i);
f = -1;
for (j = 0; j < nfields; j++) { /* find field */
if (fields[j] == IFi->number) {
f = j;
break;
}
}
if (f > -1) {
if (ncats[f] > 0)
ntabs++;
}
}
if (ntabs > 1)
ttype = GV_MTABLE;
else
ttype = GV_1TABLE;
for (i = 0; i < nfields; i++) {
int ret;
if (fields[i] == 0)
continue;
G_message(_("Layer %d"), fields[i]);
/* Make a list of categories */
IFi = Vect_get_field(&In, fields[i]);
if (!IFi) { /* no table */
G_message(_("No table"));
continue;
}
OFi =
Vect_default_field_info(&Out, IFi->number, IFi->name, ttype);
ret =
db_copy_table_by_ints(IFi->driver, IFi->database, IFi->table,
OFi->driver,
Vect_subst_var(OFi->database, &Out),
OFi->table, IFi->key, cats[i],
ncats[i]);
if (ret == DB_FAILED) {
G_warning(_("Cannot copy table"));
}
else {
Vect_map_add_dblink(&Out, OFi->number, OFi->name, OFi->table,
IFi->key, OFi->database, OFi->driver);
}
}
}
Vect_close(&In);
/* cleaning part 1: count errors */
Vect_build_partial(&Out, GV_BUILD_CENTROIDS);
err_boundaries = err_centr_out = err_centr_dupl = err_nocentr = 0;
nlines = Vect_get_num_lines(&Out);
for (line = 1; line <= nlines; line++) {
if (!Vect_line_alive(&Out, line))
continue;
type = Vect_get_line_type(&Out, line);
if (type == GV_BOUNDARY) {
int left, right;
Vect_get_line_areas(&Out, line, &left, &right);
if (left == 0 || right == 0) {
G_debug(3, "line = %d left = %d right = %d", line,
left, right);
err_boundaries++;
}
}
if (type == GV_CENTROID) {
area = Vect_get_centroid_area(&Out, line);
if (area == 0)
err_centr_out++;
else if (area < 0)
err_centr_dupl++;
}
}
err_nocentr = 0;
nareas = Vect_get_num_areas(&Out);
for (area = 1; area <= nareas; area++) {
if (!Vect_area_alive(&Out, area))
continue;
line = Vect_get_area_centroid(&Out, area);
if (line == 0)
err_nocentr++;
}
/* cleaning part 2: snap */
if (err_nocentr || err_centr_dupl || err_centr_out) {
int nmod;
G_important_message(_("Output needs topological cleaning"));
Vect_snap_lines(&Out, GV_BOUNDARY, 1e-7, NULL);
do {
Vect_break_lines(&Out, GV_BOUNDARY, NULL);
Vect_remove_duplicates(&Out, GV_BOUNDARY, NULL);
nmod =
Vect_clean_small_angles_at_nodes(&Out, GV_BOUNDARY, NULL);
} while (nmod > 0);
err_boundaries = 0;
nlines = Vect_get_num_lines(&Out);
for (line = 1; line <= nlines; line++) {
if (!Vect_line_alive(&Out, line))
continue;
type = Vect_get_line_type(&Out, line);
if (type == GV_BOUNDARY) {
int left, right;
Vect_get_line_areas(&Out, line, &left, &right);
if (left == 0 || right == 0) {
G_debug(3, "line = %d left = %d right = %d", line,
left, right);
err_boundaries++;
}
}
}
}
/* cleaning part 3: remove remaining incorrect boundaries */
if (err_boundaries) {
G_important_message(_("Removing incorrect boundaries from output"));
nlines = Vect_get_num_lines(&Out);
for (line = 1; line <= nlines; line++) {
if (!Vect_line_alive(&Out, line))
continue;
type = Vect_get_line_type(&Out, line);
if (type == GV_BOUNDARY) {
int left, right;
Vect_get_line_areas(&Out, line, &left, &right);
/* &&, not ||, no typo */
if (left == 0 && right == 0) {
G_debug(3, "line = %d left = %d right = %d", line,
left, right);
Vect_delete_line(&Out, line);
}
}
}
}
/* build clean topology */
Vect_build_partial(&Out, GV_BUILD_NONE);
Vect_build(&Out);
Vect_close(&Out);
G_done_msg(" ");
exit(EXIT_SUCCESS);
}
int delete_line_update(void *closure, int sxn, int syn, int button)
{
struct delete_line *dl = closure;
double x = D_d_to_u_col(sxn);
double y = D_d_to_u_row(syn);
G_debug(3, "button = %d x = %d = %f y = %d = %f", button, sxn, x, syn, y);
/* Display last highlighted in normal color */
if (dl->last_line > 0) {
display_line(dl->last_line, SYMB_DEFAULT, 1);
}
if (button == 3) /* Quit tool */
return 1;
if (button == 1) { /* Confirm / select */
/* Delete last if any */
if (dl->last_line > 0) {
int node1, node2;
int i;
/* Erase line and nodes !!! (because if the line is not connected to any other, nodes will die */
display_line(dl->last_line, SYMB_BACKGROUND, 1);
Vect_get_line_nodes(&Map, dl->line, &node1, &node2);
G_debug(2, "delete line = %d node1 = %d node2 = %d",
dl->last_line, node1, node2);
display_node(node1, SYMB_BACKGROUND, 1);
display_node(node2, SYMB_BACKGROUND, 1);
Vect_read_line(&Map, NULL, dl->Cats, dl->last_line);
Vect_delete_line(&Map, dl->last_line);
for (i = 0; i < dl->Cats->n_cats; i++) {
check_record(dl->Cats->field[i], dl->Cats->cat[i]);
}
for (i = 0; i < Vect_get_num_updated_lines(&Map); i++)
G_debug(2, "Updated line: %d",
Vect_get_updated_line(&Map, i));
for (i = 0; i < Vect_get_num_updated_nodes(&Map); i++)
G_debug(2, "Updated node: %d",
Vect_get_updated_node(&Map, i));
updated_lines_and_nodes_erase_refresh_display();
}
/* Find neares point or line */
dl->line =
Vect_find_line(&Map, x, y, 0, GV_POINT | GV_CENTROID, dl->thresh,
0, 0);
G_debug(2, "point found = %d", dl->line);
if (dl->line == 0)
dl->line =
Vect_find_line(&Map, x, y, 0, GV_LINE | GV_BOUNDARY,
dl->thresh, 0, 0);
G_debug(2, "line found = %d", dl->line);
/* Display new selected line if any */
if (dl->line > 0) {
display_line(dl->line, SYMB_HIGHLIGHT, 1);
}
}
else { /* button == 2 -> unselect */
dl->line = 0;
}
if (dl->line > 0)
i_prompt_buttons(_("Confirm and select next"), _("Unselect"), _("Quit tool"));
else
i_prompt_buttons(_("Select"), _("Unselect"), _("Quit tool"));
dl->last_line = dl->line;
dl->first = 0;
return 0;
}
/*!
\brief Merge lines/boundaries
At least two lines need to be given.
\param Map pointer to Map_info
\param List list of selected lines
\return number of merged lines
\return -1 on error
*/
int Vedit_merge_lines(struct Map_info *Map, struct ilist *List)
{
struct ilist *List_in_box;
struct line_pnts *Points1, *Points2, *Points;
struct line_cats *Cats1, *Cats2;
int line_i, i, j;
int line, line1, type1, line2;
int do_merge;
/* number of lines (original, selected, merged) */
int nlines, nlines_merged;
nlines_merged = 0;
if (List->n_values < 2) {
return 0;
}
Points1 = Vect_new_line_struct();
Cats1 = Vect_new_cats_struct();
Points2 = Vect_new_line_struct();
Cats2 = Vect_new_cats_struct();
Points = Vect_new_line_struct();
List_in_box = Vect_new_list();
nlines = Vect_get_num_lines(Map);
/* merge lines */
for (line_i = 0; line_i < List->n_values; line_i++) {
line1 = List->value[line_i];
if (!Vect_line_alive(Map, line1))
continue;
type1 = Vect_read_line(Map, Points1, Cats1, line1);
if (!(type1 & GV_LINES))
continue;
Vect_reset_line(Points);
for (i = 0; i < Points1->n_points; i += Points1->n_points - 1) {
Vect_reset_list(List_in_box);
/* define searching region */
Vect_reset_line(Points2);
/*
Vect_append_point (Points2, Points1 -> x[i] - thresh,
Points1 -> y[i] + thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] + thresh,
Points1 -> y[i] + thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] + thresh,
Points1 -> y[i] - thresh, Points1 -> z[i]);
Vect_append_point (Points2, Points1 -> x[i] - thresh,
Points1 -> y[i] - thresh, Points1 -> z[i]);
*/
Vect_append_point(Points2, Points1->x[i],
Points1->y[i], Points1->z[i]);
/*
* merge lines only if two lines found in the region
* i.e. the current line and an adjacent line
*/
if (1 < Vect_select_lines_by_polygon(Map, Points2, 0, NULL,
GV_LINES, List_in_box)) {
do_merge = 1;
line2 = -1;
for (j = 0; do_merge && j < List->n_values; j++) {
if (List->value[j] == line1 ||
!Vect_line_alive(Map, List->value[j]))
continue;
if (Vect_val_in_list(List_in_box, List->value[j])) {
if (line2 > 0) {
/* three lines found
* selected lines will be not merged
*/
do_merge = 0;
}
else {
line2 = List->value[j];
}
}
}
if (!do_merge || line2 < 0)
continue;
Vect_read_line(Map, Points2, Cats2, line2);
merge_lines(Points1, Cats1, Points2, Cats2, -1.0, &Points); /* do not use threshold value */
G_debug(3, "Vedit_merge_lines(): lines=%d,%d", line1, line2);
if (Points->n_points > 0) {
if (Vect_delete_line(Map, line2) == -1) {
return -1;
}
if (line2 <= nlines)
nlines_merged++;
}
}
} /* for each node */
if (Points->n_points > 0) {
line = Vect_rewrite_line(Map, line1, type1, Points, Cats1);
if (line < 0) {
return -1;
}
if (line1 <= nlines)
nlines_merged++;
/* update number of lines */
Vect_list_append(List, line);
}
} /* for each line */
/* destroy stuctures */
Vect_destroy_line_struct(Points1);
Vect_destroy_line_struct(Points2);
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats1);
Vect_destroy_cats_struct(Cats2);
return nlines_merged;
}
int
Vect_break_lines_list(struct Map_info *Map, struct ilist *List_break,
struct ilist *List_ref, int type, struct Map_info *Err)
{
struct line_pnts *APoints, *BPoints, *Points;
struct line_pnts **AXLines, **BXLines;
struct line_cats *ACats, *BCats, *Cats;
int j, k, l, ret, atype, btype, aline, bline, found, iline, nlines;
int naxlines, nbxlines, nx;
double *xx = NULL, *yx = NULL, *zx = NULL;
struct bound_box ABox, BBox;
struct boxlist *List;
int nbreaks;
int touch1_n = 0, touch1_s = 0, touch1_e = 0, touch1_w = 0; /* other vertices except node1 touching box */
int touch2_n = 0, touch2_s = 0, touch2_e = 0, touch2_w = 0; /* other vertices except node2 touching box */
int is3d;
int node, anode1, anode2, bnode1, bnode2;
double nodex, nodey;
APoints = Vect_new_line_struct();
BPoints = Vect_new_line_struct();
Points = Vect_new_line_struct();
ACats = Vect_new_cats_struct();
BCats = Vect_new_cats_struct();
Cats = Vect_new_cats_struct();
List = Vect_new_boxlist(1);
is3d = Vect_is_3d(Map);
if (List_break) {
nlines = List_break->n_values;
}
else {
nlines = Vect_get_num_lines(Map);
}
G_debug(3, "nlines = %d", nlines);
/* TODO: It seems that lines/boundaries are not broken at intersections
* with points/centroids. Check if true, if yes, skip GV_POINTS
*/
/* To find intersection of two lines (Vect_line_intersection) is quite slow.
* Fortunately usual lines/boundaries in GIS often forms a network where lines
* are connected by end points, and touch by MBR. This function checks and occasionaly
* skips such cases. This is currently done for 2D only
*/
/* Go through all lines in vector, for each select lines which overlap MBR of
* this line exclude those connected by one endpoint (see above)
* and try to intersect, if lines intersect write new lines at the end of
* the file, and process next line (remaining lines overlapping box are skipped)
*/
nbreaks = 0;
for (iline = 0; iline < nlines; iline++) {
G_percent(iline, nlines, 1);
if (List_break) {
aline = List_break->value[iline];
}
else {
aline = iline + 1;
}
if (List_ref && !Vect_val_in_list(List_ref, aline))
continue;
G_debug(3, "aline = %d", aline);
if (!Vect_line_alive(Map, aline))
continue;
atype = Vect_read_line(Map, APoints, ACats, aline);
if (!(atype & type))
continue;
Vect_line_box(APoints, &ABox);
/* Find which sides of the box are touched by intermediate (non-end) points of line */
if (!is3d) {
touch1_n = touch1_s = touch1_e = touch1_w = 0;
for (j = 1; j < APoints->n_points; j++) {
if (APoints->y[j] == ABox.N)
touch1_n = 1;
if (APoints->y[j] == ABox.S)
touch1_s = 1;
if (APoints->x[j] == ABox.E)
touch1_e = 1;
if (APoints->x[j] == ABox.W)
touch1_w = 1;
}
G_debug(3, "touch1: n = %d s = %d e = %d w = %d", touch1_n,
touch1_s, touch1_e, touch1_w);
touch2_n = touch2_s = touch2_e = touch2_w = 0;
for (j = 0; j < APoints->n_points - 1; j++) {
if (APoints->y[j] == ABox.N)
touch2_n = 1;
if (APoints->y[j] == ABox.S)
touch2_s = 1;
if (APoints->x[j] == ABox.E)
touch2_e = 1;
if (APoints->x[j] == ABox.W)
touch2_w = 1;
}
G_debug(3, "touch2: n = %d s = %d e = %d w = %d", touch2_n,
touch2_s, touch2_e, touch2_w);
}
Vect_select_lines_by_box(Map, &ABox, type, List);
G_debug(3, " %d lines selected by box", List->n_values);
for (j = 0; j < List->n_values; j++) {
bline = List->id[j];
if (List_break && !Vect_val_in_list(List_break, bline)) {
continue;
}
G_debug(3, " j = %d bline = %d", j, bline);
btype = Vect_read_line(Map, BPoints, BCats, bline);
/* Check if thouch by end node only */
if (!is3d) {
Vect_get_line_nodes(Map, aline, &anode1, &anode2);
Vect_get_line_nodes(Map, bline, &bnode1, &bnode2);
BBox = List->box[j];
if (anode1 == bnode1 || anode1 == bnode2)
node = anode1;
else if (anode2 == bnode1 || anode2 == bnode2)
node = anode2;
else
node = 0;
if (node) {
Vect_get_node_coor(Map, node, &nodex, &nodey, NULL);
if ((node == anode1 && nodey == ABox.N &&
!touch1_n && nodey == BBox.S) ||
(node == anode2 && nodey == ABox.N &&
!touch2_n && nodey == BBox.S) ||
(node == anode1 && nodey == ABox.S &&
!touch1_s && nodey == BBox.N) ||
(node == anode2 && nodey == ABox.S &&
!touch2_s && nodey == BBox.N) ||
(node == anode1 && nodex == ABox.E &&
!touch1_e && nodex == BBox.W) ||
(node == anode2 && nodex == ABox.E &&
!touch2_e && nodex == BBox.W) ||
(node == anode1 && nodex == ABox.W &&
!touch1_w && nodex == BBox.E) ||
(node == anode2 && nodex == ABox.W &&
!touch2_w && nodex == BBox.E)) {
G_debug(3,
"lines %d and %d touching by end nodes only -> no intersection",
aline, bline);
continue;
}
}
}
AXLines = NULL;
BXLines = NULL;
Vect_line_intersection(APoints, BPoints, &AXLines, &BXLines,
&naxlines, &nbxlines, 0);
G_debug(3, " naxlines = %d nbxlines = %d", naxlines, nbxlines);
/* This part handles a special case when aline == bline, no other intersection was found
* and the line is forming collapsed loop, for example 0,0;1,0;0,0 should be broken at 1,0.
* ---> */
if (aline == bline && naxlines == 0 && nbxlines == 0 &&
APoints->n_points >= 3) {
int centre;
int i;
G_debug(3, " Check collapsed loop");
if (APoints->n_points % 2) { /* odd number of vertices */
centre = APoints->n_points / 2; /* index of centre */
if (APoints->x[centre - 1] == APoints->x[centre + 1] && APoints->y[centre - 1] == APoints->y[centre + 1] && APoints->z[centre - 1] == APoints->z[centre + 1]) { /* -> break */
AXLines =
(struct line_pnts **)G_malloc(2 *
sizeof(struct
line_pnts
*));
AXLines[0] = Vect_new_line_struct();
AXLines[1] = Vect_new_line_struct();
for (i = 0; i <= centre; i++)
Vect_append_point(AXLines[0], APoints->x[i],
APoints->y[i], APoints->z[i]);
for (i = centre; i < APoints->n_points; i++)
Vect_append_point(AXLines[1], APoints->x[i],
APoints->y[i], APoints->z[i]);
naxlines = 2;
}
}
}
/* <--- */
if (Err) { /* array for intersections (more than needed */
xx = (double *)G_malloc((naxlines + nbxlines) *
sizeof(double));
yx = (double *)G_malloc((naxlines + nbxlines) *
sizeof(double));
zx = (double *)G_malloc((naxlines + nbxlines) *
sizeof(double));
}
nx = 0; /* number of intersections to be written to Err */
if (naxlines > 0) { /* intersection -> write out */
Vect_delete_line(Map, aline);
for (k = 0; k < naxlines; k++) {
/* Write new line segments */
/* line may collapse, don't write zero length lines */
Vect_line_prune(AXLines[k]);
if ((atype & GV_POINTS) || AXLines[k]->n_points > 1) {
ret = Vect_write_line(Map, atype, AXLines[k], ACats);
if (List_ref) {
Vect_list_append(List_ref, ret);
}
G_debug(3, "Line %d written, npoints = %d", ret,
AXLines[k]->n_points);
if (List_break) {
Vect_list_append(List_break, ret);
}
}
/* Write intersection points */
if (Err) {
if (k > 0) {
xx[nx] = AXLines[k]->x[0];
yx[nx] = AXLines[k]->y[0];
zx[nx] = AXLines[k]->z[0];
nx++;
}
}
Vect_destroy_line_struct(AXLines[k]);
}
nbreaks += naxlines - 1;
}
if (AXLines)
G_free(AXLines);
if (nbxlines > 0) {
if (aline != bline) { /* Self intersection, do not write twice, TODO: is it OK? */
Vect_delete_line(Map, bline);
for (k = 0; k < nbxlines; k++) {
/* Write new line segments */
/* line may collapse, don't write zero length lines */
Vect_line_prune(BXLines[k]);
if ((btype & GV_POINTS) || BXLines[k]->n_points > 1) {
ret =
Vect_write_line(Map, btype, BXLines[k],
BCats);
G_debug(5, "Line %d written", ret);
if (List_break) {
Vect_list_append(List_break, ret);
}
}
/* Write intersection points */
if (Err) {
if (k > 0) {
found = 0;
for (l = 0; l < nx; l++) {
if (xx[l] == BXLines[k]->x[0] &&
yx[l] == BXLines[k]->y[0] &&
zx[l] == BXLines[k]->z[0]) {
found = 1;
break;
}
}
if (!found) {
xx[nx] = BXLines[k]->x[0];
yx[nx] = BXLines[k]->y[0];
zx[nx] = BXLines[k]->z[0];
nx++;
}
}
}
Vect_destroy_line_struct(BXLines[k]);
}
nbreaks += nbxlines - 1;
}
else {
for (k = 0; k < nbxlines; k++)
Vect_destroy_line_struct(BXLines[k]);
}
}
if (BXLines)
G_free(BXLines);
if (Err) {
for (l = 0; l < nx; l++) { /* Write out errors */
Vect_reset_line(Points);
Vect_append_point(Points, xx[l], yx[l], zx[l]);
ret = Vect_write_line(Err, GV_POINT, Points, Cats);
}
G_free(xx);
G_free(yx);
G_free(zx);
}
if (naxlines > 0)
break; /* first line was broken and deleted -> take the next one */
}
if (List_break) {
nlines = List_break->n_values;
}
else {
nlines = Vect_get_num_lines(Map);
}
G_debug(3, "nlines = %d", nlines);
} /* for each line */
G_percent(nlines, nlines, 1); /* finish it */
G_verbose_message(_("Intersections: %d"), nbreaks);
Vect_destroy_line_struct(APoints);
Vect_destroy_line_struct(BPoints);
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(ACats);
Vect_destroy_cats_struct(BCats);
Vect_destroy_cats_struct(Cats);
Vect_destroy_boxlist(List);
return nbreaks;
}
/*!
\brief Lines z-bulk labeling
Automated labeling (z coordinate assignment) of vector lines (iso-lines).
\param Map pointer to Map_info
\param List list of selected lines
\param point_start_end staring and ending point
\param start starting value
\param step step value
\return number of modified features
\return -1 on error
*/
int Vedit_bulk_labeling(struct Map_info *Map, struct ilist *List,
double x1, double y1, double x2, double y2,
double start, double step)
{
int i, cv_i, p_i;
int line, type, temp_line;
int nlines_modified;
double value, dist;
struct line_cats *Cats;
struct line_pnts *Points, *Points_se; /* start - end */
struct bound_box box, box_se;
/* for intersection */
struct line_pnts **Points_a, **Points_b;
int nlines_a, nlines_b;
dbCatValArray cv; /* line_id / dist */
nlines_modified = 0;
value = start;
Points = Vect_new_line_struct();
Points_se = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
db_CatValArray_alloc(&cv, List->n_values);
cv.ctype = DB_C_TYPE_DOUBLE;
cv.n_values = 0;
Vect_append_point(Points_se, x1, y1, -PORT_DOUBLE_MAX);
Vect_append_point(Points_se, x2, y2, PORT_DOUBLE_MAX);
/* write temporaly line */
temp_line = Vect_write_line(Map, GV_LINE, Points_se, Cats);
if (temp_line < 0) {
return -1;
}
Vect_line_box(Points_se, &box_se);
/* determine order of lines */
cv_i = 0;
for (i = 0; i < List->n_values; i++) {
line = List->value[i];
if (!Vect_line_alive(Map, line))
continue;
type = Vect_read_line(Map, Points, NULL, line);
if (!(type & GV_LINE))
continue;
Vect_line_box(Points, &box);
if (Vect_line_check_intersection(Points_se, Points, WITH_Z)) {
Vect_line_intersection(Points_se, Points, &box_se, &box,
&Points_a, &Points_b, &nlines_a, &nlines_b,
WITHOUT_Z);
if (nlines_a < 2 || nlines_b < 1) /* should not happen */
continue;
/* calculate distance start point -> point of intersection */
for (p_i = 0; p_i < Points_a[0]->n_points; p_i++) {
Points_a[0]->z[p_i] = 0;
}
dist = Vect_line_length(Points_a[0]); /* always first line in array? */
cv.value[cv_i].cat = line;
cv.value[cv_i++].val.d = dist;
cv.n_values++;
}
}
/* sort array by distance */
db_CatValArray_sort_by_value(&cv);
/* z bulk-labeling */
for (cv_i = 0; cv_i < cv.n_values; cv_i++) {
line = cv.value[cv_i].cat;
type = Vect_read_line(Map, Points, Cats, line);
for (p_i = 0; p_i < Points->n_points; p_i++) {
Points->z[p_i] = value;
}
if (Vect_rewrite_line(Map, line, type, Points, Cats) < 0) {
return -1;
}
nlines_modified++;
value += step;
}
if (Vect_delete_line(Map, temp_line) < 0) {
return -1;
}
db_CatValArray_free(&cv);
Vect_destroy_line_struct(Points);
Vect_destroy_line_struct(Points_se);
Vect_destroy_cats_struct(Cats);
return nlines_modified;
}
