ERL_NIF_TERM
geom_to_eterm_polygon_coords(ErlNifEnv *env, const GEOSGeometry *geom)
{
unsigned int inner_num, i;
const GEOSGeometry *outer, *inner;
const GEOSCoordSequence *coords_seq;
ERL_NIF_TERM coords;
ERL_NIF_TERM *rings;
inner_num = GEOSGetNumInteriorRings(geom);
// all rings, outer + inner
rings = malloc(sizeof(ERL_NIF_TERM)*inner_num+1);
outer = GEOSGetExteriorRing(geom);
coords_seq = GEOSGeom_getCoordSeq(outer);
rings[0] = GEOSCoordSequence_to_eterm_list(env, coords_seq,
GEOSGetNumCoordinates(outer));
for (i=0; i<inner_num; i++) {
inner = GEOSGetInteriorRingN(geom, i);
coords_seq = GEOSGeom_getCoordSeq(inner);
rings[i+1] = GEOSCoordSequence_to_eterm_list(env,
coords_seq, GEOSGetNumCoordinates(inner));
}
coords = enif_make_list_from_array(env, rings, inner_num+1);
free(rings);
return coords;
}
static shapeObj *msGEOSGeometry2Shape_polygon(GEOSGeom g)
{
shapeObj *shape=NULL;
lineObj line;
int numPoints, numRings;
int i, j;
GEOSCoordSeq coords;
GEOSGeom ring;
if(!g) return NULL;
shape = (shapeObj *) malloc(sizeof(shapeObj));
msInitShape(shape);
shape->type = MS_SHAPE_POLYGON;
shape->geometry = (GEOSGeom) g;
/* exterior ring */
ring = (GEOSGeom) GEOSGetExteriorRing(g);
numPoints = GEOSGetNumCoordinates(ring);
coords = (GEOSCoordSeq) GEOSGeom_getCoordSeq(ring);
line.point = (pointObj *) malloc(sizeof(pointObj)*numPoints);
line.numpoints = numPoints;
for(i=0; i<numPoints; i++) {
GEOSCoordSeq_getX(coords, i, &(line.point[i].x));
GEOSCoordSeq_getY(coords, i, &(line.point[i].y));
/* GEOSCoordSeq_getZ(coords, i, &(line.point[i].z)); */
}
msAddLineDirectly(shape, &line);
/* interior rings */
numRings = GEOSGetNumInteriorRings(g);
for(j=0; j<numRings; j++) {
ring = (GEOSGeom) GEOSGetInteriorRingN(g, j);
if(GEOSisRing(ring) != 1) continue; /* skip it */
numPoints = GEOSGetNumCoordinates(ring);
coords = (GEOSCoordSeq) GEOSGeom_getCoordSeq(ring);
line.point = (pointObj *) malloc(sizeof(pointObj)*numPoints);
line.numpoints = numPoints;
for(i=0; i<numPoints; i++) {
GEOSCoordSeq_getX(coords, i, &(line.point[i].x));
GEOSCoordSeq_getY(coords, i, &(line.point[i].y));
/* GEOSCoordSeq_getZ(coords, i, &(line.point[i].z)); */
}
msAddLineDirectly(shape, &line);
}
msComputeBounds(shape);
return shape;
}
static shapeObj *msGEOSGeometry2Shape_line(GEOSGeom g)
{
shapeObj *shape=NULL;
int i;
int numPoints;
GEOSCoordSeq coords;
if(!g) return NULL;
numPoints = GEOSGetNumCoordinates(g);
coords = (GEOSCoordSeq) GEOSGeom_getCoordSeq(g);
shape = (shapeObj *) malloc(sizeof(shapeObj));
msInitShape(shape);
shape->type = MS_SHAPE_LINE;
shape->line = (lineObj *) malloc(sizeof(lineObj));
shape->numlines = 1;
shape->line[0].point = (pointObj *) malloc(sizeof(pointObj)*numPoints);
shape->line[0].numpoints = numPoints;
shape->geometry = (GEOSGeom) g;
for(i=0; i<numPoints; i++) {
GEOSCoordSeq_getX(coords, i, &(shape->line[0].point[i].x));
GEOSCoordSeq_getY(coords, i, &(shape->line[0].point[i].y));
/* GEOSCoordSeq_getZ(coords, i, &(shape->line[0].point[i].z)); */
}
msComputeBounds(shape);
return shape;
}
static int ring2pts(const GEOSGeometry *geom, struct line_pnts *Points)
{
int i, ncoords;
double x, y, z;
const GEOSCoordSequence *seq = NULL;
G_debug(3, "ring2pts()");
Vect_reset_line(Points);
if (!geom) {
G_warning(_("Invalid GEOS geometry!"));
return 0;
}
z = 0.0;
ncoords = GEOSGetNumCoordinates(geom);
if (!ncoords) {
G_warning(_("No coordinates in GEOS geometry (can be ok for negative distance)!"));
return 0;
}
seq = GEOSGeom_getCoordSeq(geom);
for (i = 0; i < ncoords; i++) {
GEOSCoordSeq_getX(seq, i, &x);
GEOSCoordSeq_getY(seq, i, &y);
if (x != x || x > DBL_MAX || x < -DBL_MAX)
G_fatal_error(_("Invalid x coordinate %f"), x);
if (y != y || y > DBL_MAX || y < -DBL_MAX)
G_fatal_error(_("Invalid y coordinate %f"), y);
Vect_append_point(Points, x, y, z);
}
return 1;
}
ERL_NIF_TERM
geom_to_eterm_linestring_coords(ErlNifEnv *env, const GEOSGeometry *geom)
{
const GEOSCoordSequence *coords_seq;
coords_seq = GEOSGeom_getCoordSeq(geom);
return GEOSCoordSequence_to_eterm_list(env, coords_seq,
GEOSGetNumCoordinates(geom));
}
void geo_points(sqlite3_context *context,int argc,sqlite3_value **argv)
{
if(argc == 1 && sqlite3_value_type(argv[0]) == SQLITE_BLOB)
{
GEOSGeometry* geometry;
const void* data = sqlite3_value_blob(argv[0]);
size_t data_size = sqlite3_value_bytes(argv[0]);
_init_geos();
geometry = _geo_from_wkb((const unsigned char*)data,data_size);
if(geometry != 0)
{
int num_points = GEOSGetNumCoordinates(geometry);
sqlite3_result_int(context,num_points);
}
GEOSGeom_destroy(geometry);
finishGEOS();
}
}
static shapeObj *msGEOSGeometry2Shape_multiline(GEOSGeom g)
{
int i, j;
int numPoints, numLines;
GEOSCoordSeq coords;
GEOSGeom lineString;
shapeObj *shape=NULL;
lineObj line;
if(!g) return NULL;
numLines = GEOSGetNumGeometries(g);
shape = (shapeObj *) malloc(sizeof(shapeObj));
msInitShape(shape);
shape->type = MS_SHAPE_LINE;
shape->geometry = (GEOSGeom) g;
for(j=0; j<numLines; j++) {
lineString = (GEOSGeom) GEOSGetGeometryN(g, j);
numPoints = GEOSGetNumCoordinates(lineString);
coords = (GEOSCoordSeq) GEOSGeom_getCoordSeq(lineString);
line.point = (pointObj *) malloc(sizeof(pointObj)*numPoints);
line.numpoints = numPoints;
for(i=0; i<numPoints; i++) {
GEOSCoordSeq_getX(coords, i, &(line.point[i].x));
GEOSCoordSeq_getY(coords, i, &(line.point[i].y));
/* GEOSCoordSeq_getZ(coords, i, &(line.point[i].z)); */
}
msAddLineDirectly(shape, &line);
}
msComputeBounds(shape);
return shape;
}
