SEXP rgeos_node(SEXP env, SEXP obj) {
SEXP ans, id;
int pc=0;
GEOSContextHandle_t GEOShandle = getContextHandle(env);
SEXP p4s = GET_SLOT(obj, install("proj4string"));
GEOSGeom geom = rgeos_convert_R2geos(env, obj);
// int type = GEOSGeomTypeId_r(GEOShandle, geom);
//Rprintf("type: %d, %s\n", type, GEOSGeomType_r(GEOShandle, geom));
GEOSGeom res = GEOSNode_r(GEOShandle, geom);
// type = GEOSGeomTypeId_r(GEOShandle, res);
int ng = GEOSGetNumGeometries_r(GEOShandle, res);
//Rprintf("ng: %d, type: %d, %s\n", ng, type, GEOSGeomType_r(GEOShandle, res));
char buf[BUFSIZ];
PROTECT(id = NEW_CHARACTER(ng)); pc++;
for (int i=0; i<ng; i++) {
sprintf(buf, "%d", i);
SET_STRING_ELT(id, i, COPY_TO_USER_STRING(buf));
}
GEOSGeom_destroy_r(GEOShandle, geom);
ans = rgeos_convert_geos2R(env, res, p4s, id);
UNPROTECT(pc);
return(ans);
}
SEXP rgeos_miscfunc(SEXP env, SEXP obj, SEXP byid, p_miscfunc miscfunc) {
SEXP ans;
GEOSContextHandle_t GEOShandle = getContextHandle(env);
GEOSGeom geom = rgeos_convert_R2geos(env, obj);
int type = GEOSGeomTypeId_r(GEOShandle, geom);
int n = (LOGICAL_POINTER(byid)[0] && type == GEOS_GEOMETRYCOLLECTION) ?
GEOSGetNumGeometries_r(GEOShandle, geom) : 1;
int pc=0;
PROTECT(ans = NEW_NUMERIC(n)); pc++;
GEOSGeom curgeom = geom;
for(int i=0; i<n; i++) {
if ( n > 1) {
curgeom = (GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom, i);
if (curgeom == NULL) error("rgeos_miscfunc: unable to get subgeometries");
}
double val;
if (!miscfunc(GEOShandle, curgeom, &val))
error("rgeos_miscfunc: unable to calculate");
NUMERIC_POINTER(ans)[i] = val;
}
GEOSGeom_destroy_r(GEOShandle, geom);
UNPROTECT(pc);
return(ans);
}
RGEO_BEGIN_C
/**** INTERNAL UTILITY FUNCTIONS ****/
// Determine the dimension of the given geometry. Empty collections have dimension -1.
// Recursively checks collection elemenets.
static int compute_dimension(GEOSContextHandle_t context, const GEOSGeometry* geom)
{
int result;
int size;
int i;
int dim;
result = -1;
if (geom) {
switch (GEOSGeomTypeId_r(context, geom)) {
case GEOS_POINT:
result = 0;
break;
case GEOS_MULTIPOINT:
if (!GEOSisEmpty_r(context, geom)) {
result = 0;
}
break;
case GEOS_LINESTRING:
case GEOS_LINEARRING:
result = 1;
break;
case GEOS_MULTILINESTRING:
if (!GEOSisEmpty_r(context, geom)) {
result = 1;
}
break;
case GEOS_POLYGON:
result = 2;
break;
case GEOS_MULTIPOLYGON:
if (!GEOSisEmpty_r(context, geom)) {
result = 2;
}
break;
case GEOS_GEOMETRYCOLLECTION:
size = GEOSGetNumGeometries_r(context, geom);
for (i=0; i<size; ++i) {
dim = compute_dimension(context, GEOSGetGeometryN_r(context, geom, i));
if (dim > result) {
result = dim;
}
}
break;
}
}
return result;
}
QLinkedList<const GEOSGeometry *>* pal::Util::unmulti( const GEOSGeometry *the_geom )
{
QLinkedList<const GEOSGeometry*> *queue = new QLinkedList<const GEOSGeometry*>;
QLinkedList<const GEOSGeometry*> *final_queue = new QLinkedList<const GEOSGeometry*>;
const GEOSGeometry *geom;
queue->append( the_geom );
int nGeom;
int i;
GEOSContextHandle_t geosctxt = geosContext();
while ( !queue->isEmpty() )
{
geom = queue->takeFirst();
int type = GEOSGeomTypeId_r( geosctxt, geom );
switch ( type )
{
case GEOS_MULTIPOINT:
case GEOS_MULTILINESTRING:
case GEOS_MULTIPOLYGON:
nGeom = GEOSGetNumGeometries_r( geosctxt, geom );
for ( i = 0; i < nGeom; i++ )
{
queue->append( GEOSGetGeometryN_r( geosctxt, geom, i ) );
}
break;
case GEOS_POINT:
case GEOS_LINESTRING:
case GEOS_POLYGON:
final_queue->append( geom );
break;
default:
QgsDebugMsg( QString( "unexpected geometry type:%1" ).arg( type ) );
delete final_queue;
delete queue;
return nullptr;
}
}
delete queue;
return final_queue;
}
SEXP rgeos_delaunaytriangulation(SEXP env, SEXP obj, SEXP tol,
SEXP onlyEdges) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
double tolerance = NUMERIC_POINTER(tol)[0];
int oE = INTEGER_POINTER(onlyEdges)[0];
int pc=0;
SEXP ans, id;
SEXP p4s = GET_SLOT(obj, install("proj4string"));
GEOSGeom geom = rgeos_convert_R2geos(env, obj);
GEOSGeom resgeom = GEOSDelaunayTriangulation_r(GEOShandle, geom,
tolerance, oE);
if (resgeom == NULL)
error("rgeos_delaunaytriangulation: unable to compute");
GEOSGeom_destroy_r(GEOShandle, geom);
// int type = GEOSGeomTypeId_r(GEOShandle, resgeom);
int ng = GEOSGetNumGeometries_r(GEOShandle, resgeom);
//Rprintf("ng: %d, type: %d, %s\n", ng, type, GEOSGeomType_r(GEOShandle, resgeom));
// FIXME convert type 5 to type 7
char buf[BUFSIZ];
PROTECT(id = NEW_CHARACTER(ng)); pc++;
for (int i=0; i<ng; i++) {
sprintf(buf, "%d", i);
SET_STRING_ELT(id, i, COPY_TO_USER_STRING(buf));
}
ans = rgeos_convert_geos2R(env, resgeom, p4s, id);
UNPROTECT(pc);
return(ans);
}
QLinkedList<const GEOSGeometry *> *unmulti( const GEOSGeometry *the_geom )
{
QLinkedList<const GEOSGeometry*> *queue = new QLinkedList<const GEOSGeometry*>;
QLinkedList<const GEOSGeometry*> *final_queue = new QLinkedList<const GEOSGeometry*>;
const GEOSGeometry *geom;
queue->append( the_geom );
int nGeom;
int i;
while ( !queue->isEmpty() )
{
geom = queue->takeFirst();
GEOSContextHandle_t geosctxt = geosContext();
switch ( GEOSGeomTypeId_r( geosctxt, geom ) )
{
case GEOS_MULTIPOINT:
case GEOS_MULTILINESTRING:
case GEOS_MULTIPOLYGON:
nGeom = GEOSGetNumGeometries_r( geosctxt, geom );
for ( i = 0; i < nGeom; i++ )
{
queue->append( GEOSGetGeometryN_r( geosctxt, geom, i ) );
}
break;
case GEOS_POINT:
case GEOS_LINESTRING:
case GEOS_POLYGON:
final_queue->append( geom );
break;
default:
delete final_queue;
delete queue;
return NULL;
}
}
delete queue;
return final_queue;
}
SEXP rgeos_topologyfunc(SEXP env, SEXP obj, SEXP id, SEXP byid, p_topofunc topofunc) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
SEXP p4s = GET_SLOT(obj, install("proj4string"));
GEOSGeom geom = rgeos_convert_R2geos(env, obj);
int type = GEOSGeomTypeId_r(GEOShandle, geom);
int n = 1;
if (LOGICAL_POINTER(byid)[0] && type == GEOS_GEOMETRYCOLLECTION)
n = GEOSGetNumGeometries_r(GEOShandle, geom);
if (n < 1) error("rgeos_topologyfunc: invalid number of geometries");
GEOSGeom *resgeoms = (GEOSGeom *) R_alloc((size_t) n, sizeof(GEOSGeom));
for(int i=0; i<n; i++) {
const GEOSGeometry *curgeom = (n > 1) ? (GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom, i)
: geom;
if (curgeom == NULL)
error("rgeos_topologyfunc: unable to get subgeometries");
if ( topofunc == GEOSUnionCascaded_r
&& GEOSGeomTypeId_r(GEOShandle, curgeom) == GEOS_POLYGON) {
resgeoms[i] = GEOSGeom_clone_r(GEOShandle, curgeom);
} else {
resgeoms[i] = topofunc(GEOShandle, curgeom);
if (resgeoms[i] == NULL)
error("rgeos_topologyfunc: unable to calculate");
}
}
GEOSGeom_destroy_r(GEOShandle, geom);
GEOSGeom res = (n == 1) ? resgeoms[0]
: GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, resgeoms, (unsigned int) n);
return( rgeos_convert_geos2R(env, res, p4s, id) ); // releases res
}
// Will return NULL on error (expect error handler being called by then)
static GEOSGeometry *LWGEOM_GEOS_makeValidCollection( const GEOSGeometry *gin, QString &errorMessage )
{
GEOSContextHandle_t handle = QgsGeos::getGEOSHandler();
int nvgeoms = GEOSGetNumGeometries_r( handle, gin );
if ( nvgeoms == -1 )
{
errorMessage = QStringLiteral( "GEOSGetNumGeometries: %1" ).arg( QStringLiteral( "?" ) );
return nullptr;
}
QVector<GEOSGeometry *> vgeoms( nvgeoms );
for ( int i = 0; i < nvgeoms; ++i )
{
vgeoms[i] = LWGEOM_GEOS_makeValid( GEOSGetGeometryN_r( handle, gin, i ), errorMessage );
if ( ! vgeoms[i] )
{
while ( i-- )
GEOSGeom_destroy_r( handle, vgeoms[i] );
// we expect lwerror being called already by makeValid
return nullptr;
}
}
// Collect areas and lines (if any line)
try
{
return GEOSGeom_createCollection_r( handle, GEOS_GEOMETRYCOLLECTION, vgeoms.data(), nvgeoms );
}
catch ( GEOSException &e )
{
// cleanup and throw
for ( int i = 0; i < nvgeoms; ++i )
GEOSGeom_destroy_r( handle, vgeoms[i] );
errorMessage = QStringLiteral( "GEOSGeom_createCollection() threw an error: %1" ).arg( e.what() );
return nullptr;
}
}
SEXP rgeos_simplify(SEXP env, SEXP obj, SEXP tol, SEXP id, SEXP byid, SEXP topPres) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
SEXP p4s = GET_SLOT(obj, install("proj4string"));
GEOSGeom geom = rgeos_convert_R2geos(env, obj);
int type = GEOSGeomTypeId_r(GEOShandle, geom);
int preserve = LOGICAL_POINTER(topPres)[0];
double tolerance = NUMERIC_POINTER(tol)[0];
int n = 1;
if (LOGICAL_POINTER(byid)[0] && type == GEOS_GEOMETRYCOLLECTION)
n = GEOSGetNumGeometries_r(GEOShandle, geom);
if (n < 1) error("rgeos_simplify: invalid number of geometries");
GEOSGeom *resgeoms = (GEOSGeom *) R_alloc((size_t) n, sizeof(GEOSGeom));
for(int i=0; i<n; i++) {
const GEOSGeometry *curgeom = (n > 1) ? (GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom, i)
: geom;
if (curgeom == NULL)
error("rgeos_topologyfunc: unable to get subgeometries");
resgeoms[i] = (preserve)
? GEOSTopologyPreserveSimplify_r(GEOShandle, curgeom, tolerance)
: GEOSSimplify_r(GEOShandle, curgeom, tolerance);
}
GEOSGeom_destroy_r(GEOShandle, geom);
GEOSGeom res = (n == 1) ? resgeoms[0] :
GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, resgeoms, (unsigned int) n);
return( rgeos_convert_geos2R(env, res, p4s, id) );
}
void Point::update(const std::string& wkt_or_json, SpatialReference ref)
{
Geometry::update(wkt_or_json, ref);
int t = GEOSGeomTypeId_r(m_geoserr.ctx(), m_geom.get());
if (t == -1)
throw pdal_error("Unable to fetch geometry point type");
if (t > 0)
throw pdal_error("Geometry type is not point!");
int nGeometries = GEOSGetNumGeometries_r(m_geoserr.ctx(), m_geom.get());
if (nGeometries > 1)
throw pdal_error("Geometry count is > 1!");
const GEOSGeometry* g = GEOSGetGeometryN_r(m_geoserr.ctx(), m_geom.get(), 0);
GEOSCoordSequence const* coords = GEOSGeom_getCoordSeq_r(m_geoserr.ctx(), g);
uint32_t numInputDims;
GEOSCoordSeq_getDimensions_r(m_geoserr.ctx(), coords, &numInputDims);
uint32_t count(0);
GEOSCoordSeq_getSize_r(m_geoserr.ctx(), coords, &count);
if (count == 0)
throw pdal_error("No coordinates in geometry!");
for (unsigned i = 0; i < count; ++i)
{
GEOSCoordSeq_getOrdinate_r(m_geoserr.ctx(), coords, i, 0, &x);
GEOSCoordSeq_getOrdinate_r(m_geoserr.ctx(), coords, i, 1, &y);
if (numInputDims > 2)
GEOSCoordSeq_getOrdinate_r(m_geoserr.ctx(), coords, i, 2, &z);
}
}
SEXP rgeos_distancefunc(SEXP env, SEXP spgeom1, SEXP spgeom2, SEXP byid, p_distfunc distfunc) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
GEOSGeom geom1 = rgeos_convert_R2geos(env, spgeom1);
int type1 = GEOSGeomTypeId_r(GEOShandle, geom1);
GEOSGeom geom2;
int type2;
int sym_ans = FALSE;
if (spgeom2 == R_NilValue) {
sym_ans = TRUE;
geom2 = geom1;
type2 = GEOSGeomTypeId_r(GEOShandle, geom2);
} else {
geom2 = rgeos_convert_R2geos(env, spgeom2);
type2 = GEOSGeomTypeId_r(GEOShandle, geom2);
}
int m = (LOGICAL_POINTER(byid)[0] && type1 == GEOS_GEOMETRYCOLLECTION) ?
GEOSGetNumGeometries_r(GEOShandle, geom1) : 1;
int n = (LOGICAL_POINTER(byid)[1] && type2 == GEOS_GEOMETRYCOLLECTION) ?
GEOSGetNumGeometries_r(GEOShandle, geom2) : 1;
if (m == -1) error("rgeos_distancefunc: invalid number of subgeometries in geometry 1");
if (n == -1) error("rgeos_distancefunc: invalid number of subgeometries in geometry 2");
int pc=0;
SEXP ans;
PROTECT(ans = NEW_NUMERIC(m*n)); pc++;
GEOSGeom curgeom1 = geom1;
GEOSGeom curgeom2 = geom2;
for(int i=0; i<m; i++) {
if ( m > 1) {
curgeom1 = (GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom1, i);
if (curgeom1 == NULL)
error("rgeos_binpredfunc: unable to get subgeometries from geometry 1");
}
for(int j=0; j<n; j++) {
if(sym_ans && j > i)
break;
if ( n > 1) {
curgeom2 = (GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom2, j);
if (curgeom2 == NULL)
error("rgeos_binpredfunc: unable to get subgeometries from geometry 2");
}
double dist;
if (!distfunc(GEOShandle, curgeom1, curgeom2, &dist))
error("rgeos_distancefunc: unable to calculate distance");
NUMERIC_POINTER(ans)[n*i+j] = dist;
if (sym_ans) NUMERIC_POINTER(ans)[n*j+i] = dist;
}
}
if (LOGICAL_POINTER(byid)[0] || LOGICAL_POINTER(byid)[1]) {
SEXP dims;
PROTECT(dims = NEW_INTEGER(2)); pc++;
INTEGER_POINTER(dims)[0] = n;
INTEGER_POINTER(dims)[1] = m;
setAttrib(ans, R_DimSymbol, dims);
}
GEOSGeom_destroy_r(GEOShandle, geom1);
if (!sym_ans)
GEOSGeom_destroy_r(GEOShandle, geom2);
UNPROTECT(pc);
return(ans);
}
Polygon Polygon::simplify(double distance_tolerance,
double area_tolerance) const
{
GEOSGeometry *smoothed =
GEOSTopologyPreserveSimplify_r(m_ctx, m_geom, distance_tolerance);
if (!smoothed)
throw pdal_error("Unable to simplify input geometry!");
std::vector<GEOSGeometry*> geometries;
int numGeom = GEOSGetNumGeometries_r(m_ctx, smoothed);
for (int n = 0; n < numGeom; ++n)
{
const GEOSGeometry* m = GEOSGetGeometryN_r(m_ctx, smoothed, n);
if (!m)
throw pdal::pdal_error("Unable to Get GeometryN");
const GEOSGeometry* ering = GEOSGetExteriorRing_r(m_ctx, m);
if (!ering)
throw pdal::pdal_error("Unable to Get Exterior Ring");
GEOSGeometry* exterior = GEOSGeom_clone_r(m_ctx,
GEOSGetExteriorRing_r(m_ctx, m));
if (!exterior)
throw pdal::pdal_error("Unable to clone exterior ring!");
std::vector<GEOSGeometry*> keep_rings;
int numRings = GEOSGetNumInteriorRings_r(m_ctx, m);
for (int i = 0; i < numRings; ++i)
{
double area(0.0);
const GEOSGeometry* iring =
GEOSGetInteriorRingN_r(m_ctx, m, i);
if (!iring)
throw pdal::pdal_error("Unable to Get Interior Ring");
GEOSGeometry* cring = GEOSGeom_clone_r(m_ctx, iring);
if (!cring)
throw pdal::pdal_error("Unable to clone interior ring!");
GEOSGeometry* aring = GEOSGeom_createPolygon_r(m_ctx, cring,
NULL, 0);
int errored = GEOSArea_r(m_ctx, aring, &area);
if (errored == 0)
throw pdal::pdal_error("Unable to get area of ring!");
if (area > area_tolerance)
{
keep_rings.push_back(cring);
}
}
GEOSGeometry* p = GEOSGeom_createPolygon_r(m_ctx, exterior,
keep_rings.data(), keep_rings.size());
if (p == NULL) throw
pdal::pdal_error("smooth polygon could not be created!" );
geometries.push_back(p);
}
GEOSGeometry* o = GEOSGeom_createCollection_r(m_ctx, GEOS_MULTIPOLYGON,
geometries.data(), geometries.size());
Polygon p(o, m_srs, m_ctx);
GEOSGeom_destroy_r(m_ctx, smoothed);
GEOSGeom_destroy_r(m_ctx, o);
return p;
}
static GEOSGeometry *LWGEOM_GEOS_makeValidMultiLine( const GEOSGeometry *gin, QString &errorMessage )
{
GEOSContextHandle_t handle = QgsGeos::getGEOSHandler();
int ngeoms = GEOSGetNumGeometries_r( handle, gin );
uint32_t nlines_alloc = ngeoms;
QVector<GEOSGeometry *> lines;
QVector<GEOSGeometry *> points;
lines.reserve( nlines_alloc );
points.reserve( ngeoms );
for ( int i = 0; i < ngeoms; ++i )
{
const GEOSGeometry *g = GEOSGetGeometryN_r( handle, gin, i );
GEOSGeometry *vg = LWGEOM_GEOS_makeValidLine( g, errorMessage );
if ( GEOSisEmpty_r( handle, vg ) )
{
// we don't care about this one
GEOSGeom_destroy_r( handle, vg );
}
if ( GEOSGeomTypeId_r( handle, vg ) == GEOS_POINT )
{
points.append( vg );
}
else if ( GEOSGeomTypeId_r( handle, vg ) == GEOS_LINESTRING )
{
lines.append( vg );
}
else if ( GEOSGeomTypeId_r( handle, vg ) == GEOS_MULTILINESTRING )
{
int nsubgeoms = GEOSGetNumGeometries_r( handle, vg );
nlines_alloc += nsubgeoms;
lines.reserve( nlines_alloc );
for ( int j = 0; j < nsubgeoms; ++j )
{
// NOTE: ownership of the cloned geoms will be taken by final collection
lines.append( GEOSGeom_clone_r( handle, GEOSGetGeometryN_r( handle, vg, j ) ) );
}
}
else
{
// NOTE: return from GEOSGeomType will leak but we really don't expect this to happen
errorMessage = QStringLiteral( "unexpected geom type returned by LWGEOM_GEOS_makeValid: %1" ).arg( GEOSGeomTypeId_r( handle, vg ) );
}
}
GEOSGeometry *mpoint_out = nullptr;
if ( points.count() )
{
if ( points.count() > 1 )
{
mpoint_out = GEOSGeom_createCollection_r( handle, GEOS_MULTIPOINT, points.data(), points.count() );
}
else
{
mpoint_out = points[0];
}
}
GEOSGeometry *mline_out = nullptr;
if ( lines.count() )
{
if ( lines.count() > 1 )
{
mline_out = GEOSGeom_createCollection_r( handle, GEOS_MULTILINESTRING, lines.data(), lines.count() );
}
else
{
mline_out = lines[0];
}
}
if ( mline_out && mpoint_out )
{
GEOSGeometry *collection[2];
collection[0] = mline_out;
collection[1] = mpoint_out;
return GEOSGeom_createCollection_r( handle, GEOS_GEOMETRYCOLLECTION, collection, 2 );
}
else if ( mline_out )
{
return mline_out;
}
else if ( mpoint_out )
{
return mpoint_out;
}
else
{
return nullptr;
}
}
// Will return NULL on error (expect error handler being called by then)
Q_NOWARN_UNREACHABLE_PUSH
static GEOSGeometry *LWGEOM_GEOS_makeValidPolygon( const GEOSGeometry *gin, QString &errorMessage )
{
GEOSContextHandle_t handle = QgsGeos::getGEOSHandler();
GEOSGeom gout;
GEOSGeom geos_bound;
GEOSGeom geos_cut_edges, geos_area, collapse_points;
GEOSGeometry *vgeoms[3]; // One for area, one for cut-edges
unsigned int nvgeoms = 0;
Q_ASSERT( GEOSGeomTypeId_r( handle, gin ) == GEOS_POLYGON ||
GEOSGeomTypeId_r( handle, gin ) == GEOS_MULTIPOLYGON );
geos_bound = GEOSBoundary_r( handle, gin );
if ( !geos_bound )
return nullptr;
// Use noded boundaries as initial "cut" edges
geos_cut_edges = LWGEOM_GEOS_nodeLines( geos_bound );
if ( !geos_cut_edges )
{
GEOSGeom_destroy_r( handle, geos_bound );
errorMessage = QStringLiteral( "LWGEOM_GEOS_nodeLines() failed" );
return nullptr;
}
// NOTE: the noding process may drop lines collapsing to points.
// We want to retrieve any of those
{
GEOSGeometry *pi = nullptr;
GEOSGeometry *po = nullptr;
try
{
pi = GEOSGeom_extractUniquePoints_r( handle, geos_bound );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_bound );
errorMessage = QStringLiteral( "GEOSGeom_extractUniquePoints(): %1" ).arg( e.what() );
return nullptr;
}
try
{
po = GEOSGeom_extractUniquePoints_r( handle, geos_cut_edges );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_bound );
GEOSGeom_destroy_r( handle, pi );
errorMessage = QStringLiteral( "GEOSGeom_extractUniquePoints(): %1" ).arg( e.what() );
return nullptr;
}
try
{
collapse_points = GEOSDifference_r( handle, pi, po );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_bound );
GEOSGeom_destroy_r( handle, pi );
GEOSGeom_destroy_r( handle, po );
errorMessage = QStringLiteral( "GEOSDifference(): %1" ).arg( e.what() );
return nullptr;
}
GEOSGeom_destroy_r( handle, pi );
GEOSGeom_destroy_r( handle, po );
}
GEOSGeom_destroy_r( handle, geos_bound );
// And use an empty geometry as initial "area"
try
{
geos_area = GEOSGeom_createEmptyPolygon_r( handle );
}
catch ( GEOSException &e )
{
errorMessage = QStringLiteral( "GEOSGeom_createEmptyPolygon(): %1" ).arg( e.what() );
GEOSGeom_destroy_r( handle, geos_cut_edges );
return nullptr;
}
// See if an area can be build with the remaining edges
// and if it can, symdifference with the original area.
// Iterate this until no more polygons can be created
// with left-over edges.
while ( GEOSGetNumGeometries_r( handle, geos_cut_edges ) )
{
GEOSGeometry *new_area = nullptr;
GEOSGeometry *new_area_bound = nullptr;
GEOSGeometry *symdif = nullptr;
GEOSGeometry *new_cut_edges = nullptr;
// ASSUMPTION: cut_edges should already be fully noded
try
{
new_area = LWGEOM_GEOS_buildArea( geos_cut_edges, errorMessage );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_cut_edges );
GEOSGeom_destroy_r( handle, geos_area );
errorMessage = QStringLiteral( "LWGEOM_GEOS_buildArea() threw an error: %1" ).arg( e.what() );
return nullptr;
}
if ( GEOSisEmpty_r( handle, new_area ) )
{
// no more rings can be build with thes edges
GEOSGeom_destroy_r( handle, new_area );
break;
}
// We succeeded in building a ring !
// Save the new ring boundaries first (to compute
// further cut edges later)
try
{
new_area_bound = GEOSBoundary_r( handle, new_area );
}
catch ( GEOSException &e )
{
// We did check for empty area already so
// this must be some other error
errorMessage = QStringLiteral( "GEOSBoundary() threw an error: %1" ).arg( e.what() );
GEOSGeom_destroy_r( handle, new_area );
GEOSGeom_destroy_r( handle, geos_area );
return nullptr;
}
// Now symdiff new and old area
try
{
symdif = GEOSSymDifference_r( handle, geos_area, new_area );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_cut_edges );
GEOSGeom_destroy_r( handle, new_area );
GEOSGeom_destroy_r( handle, new_area_bound );
GEOSGeom_destroy_r( handle, geos_area );
errorMessage = QStringLiteral( "GEOSSymDifference() threw an error: %1" ).arg( e.what() );
return nullptr;
}
GEOSGeom_destroy_r( handle, geos_area );
GEOSGeom_destroy_r( handle, new_area );
geos_area = symdif;
symdif = nullptr;
// Now let's re-set geos_cut_edges with what's left
// from the original boundary.
// ASSUMPTION: only the previous cut-edges can be
// left, so we don't need to reconsider
// the whole original boundaries
//
// NOTE: this is an expensive operation.
try
{
new_cut_edges = GEOSDifference_r( handle, geos_cut_edges, new_area_bound );
}
catch ( GEOSException &e )
{
GEOSGeom_destroy_r( handle, geos_cut_edges );
GEOSGeom_destroy_r( handle, new_area_bound );
GEOSGeom_destroy_r( handle, geos_area );
errorMessage = QStringLiteral( "GEOSDifference() threw an error: %1" ).arg( e.what() );
return nullptr;
}
GEOSGeom_destroy_r( handle, geos_cut_edges );
GEOSGeom_destroy_r( handle, new_area_bound );
geos_cut_edges = new_cut_edges;
}
if ( !GEOSisEmpty_r( handle, geos_area ) )
{
vgeoms[nvgeoms++] = geos_area;
}
else
{
GEOSGeom_destroy_r( handle, geos_area );
}
if ( !GEOSisEmpty_r( handle, geos_cut_edges ) )
{
vgeoms[nvgeoms++] = geos_cut_edges;
}
else
{
GEOSGeom_destroy_r( handle, geos_cut_edges );
}
if ( !GEOSisEmpty_r( handle, collapse_points ) )
{
vgeoms[nvgeoms++] = collapse_points;
}
else
{
GEOSGeom_destroy_r( handle, collapse_points );
}
if ( 1 == nvgeoms )
{
// Return cut edges
gout = vgeoms[0];
}
else
{
// Collect areas and lines (if any line)
try
{
gout = GEOSGeom_createCollection_r( handle, GEOS_GEOMETRYCOLLECTION, vgeoms, nvgeoms );
}
catch ( GEOSException &e )
{
errorMessage = QStringLiteral( "GEOSGeom_createCollection() threw an error: %1" ).arg( e.what() );
// TODO: cleanup!
return nullptr;
}
}
return gout;
}
Q_NOWARN_UNREACHABLE_POP
// Return Nth vertex in GEOSGeometry as a POINT.
// May return NULL if the geometry has NO vertexex.
static GEOSGeometry *LWGEOM_GEOS_getPointN( const GEOSGeometry *g_in, uint32_t n )
{
GEOSContextHandle_t handle = QgsGeos::getGEOSHandler();
uint32_t dims;
const GEOSCoordSequence *seq_in = nullptr;
GEOSCoordSeq seq_out;
double val;
uint32_t sz;
int gn;
GEOSGeometry *ret = nullptr;
switch ( GEOSGeomTypeId_r( handle, g_in ) )
{
case GEOS_MULTIPOINT:
case GEOS_MULTILINESTRING:
case GEOS_MULTIPOLYGON:
case GEOS_GEOMETRYCOLLECTION:
{
for ( gn = 0; gn < GEOSGetNumGeometries_r( handle, g_in ); ++gn )
{
const GEOSGeometry *g = GEOSGetGeometryN_r( handle, g_in, gn );
ret = LWGEOM_GEOS_getPointN( g, n );
if ( ret ) return ret;
}
break;
}
case GEOS_POLYGON:
{
ret = LWGEOM_GEOS_getPointN( GEOSGetExteriorRing_r( handle, g_in ), n );
if ( ret ) return ret;
for ( gn = 0; gn < GEOSGetNumInteriorRings_r( handle, g_in ); ++gn )
{
const GEOSGeometry *g = GEOSGetInteriorRingN_r( handle, g_in, gn );
ret = LWGEOM_GEOS_getPointN( g, n );
if ( ret ) return ret;
}
break;
}
case GEOS_POINT:
case GEOS_LINESTRING:
case GEOS_LINEARRING:
break;
}
seq_in = GEOSGeom_getCoordSeq_r( handle, g_in );
if ( ! seq_in ) return nullptr;
if ( ! GEOSCoordSeq_getSize_r( handle, seq_in, &sz ) ) return nullptr;
if ( ! sz ) return nullptr;
if ( ! GEOSCoordSeq_getDimensions_r( handle, seq_in, &dims ) ) return nullptr;
seq_out = GEOSCoordSeq_create_r( handle, 1, dims );
if ( ! seq_out ) return nullptr;
if ( ! GEOSCoordSeq_getX_r( handle, seq_in, n, &val ) ) return nullptr;
if ( ! GEOSCoordSeq_setX_r( handle, seq_out, n, val ) ) return nullptr;
if ( ! GEOSCoordSeq_getY_r( handle, seq_in, n, &val ) ) return nullptr;
if ( ! GEOSCoordSeq_setY_r( handle, seq_out, n, val ) ) return nullptr;
if ( dims > 2 )
{
if ( ! GEOSCoordSeq_getZ_r( handle, seq_in, n, &val ) ) return nullptr;
if ( ! GEOSCoordSeq_setZ_r( handle, seq_out, n, val ) ) return nullptr;
}
return GEOSGeom_createPoint_r( handle, seq_out );
}
SEXP rgeos_geospolygon2Polygons(SEXP env, GEOSGeom geom, SEXP ID) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
int pc=0;
int type = GEOSGeomTypeId_r(GEOShandle, geom);
int empty = GEOSisEmpty_r(GEOShandle, geom);
int ngeom = GEOSGetNumGeometries_r(GEOShandle, geom);
ngeom = ngeom ? ngeom : 1;
int npoly = 0;
for (int i=0; i<ngeom; i++) {
GEOSGeom GC = (type == GEOS_MULTIPOLYGON && !empty) ?
(GEOSGeometry *) GEOSGetGeometryN_r(GEOShandle, geom, i) :
geom;
int GCempty = GEOSisEmpty_r(GEOShandle, GC);
int GCpolys = (GCempty) ? 1 :
GEOSGetNumInteriorRings_r(GEOShandle, GC) + 1;
npoly += GCpolys;
}
SEXP polys;
PROTECT(polys = NEW_LIST(npoly)); pc++;
int *comm = (int *) R_alloc((size_t) npoly, sizeof(int));
int *po = (int *) R_alloc((size_t) npoly, sizeof(int));
double *areas = (double *) R_alloc((size_t) npoly, sizeof(double));
double totalarea = 0.0;
int k = 0;
for (int i=0; i<ngeom; i++) {
GEOSGeom GC = (type == GEOS_MULTIPOLYGON && !empty) ?
(GEOSGeometry *) GEOSGetGeometryN_r(GEOShandle, geom, i) :
geom;
if (GEOSisEmpty_r(GEOShandle, GC)) {
SEXP ringDir,area,labpt,hole;
PROTECT(ringDir = NEW_INTEGER(1));
INTEGER_POINTER(ringDir)[0] = 1;
PROTECT(labpt = NEW_NUMERIC(2));
NUMERIC_POINTER(labpt)[0] = NA_REAL;
NUMERIC_POINTER(labpt)[1] = NA_REAL;
PROTECT(area = NEW_NUMERIC(1));
NUMERIC_POINTER(area)[0] = 0.0;
PROTECT(hole = NEW_LOGICAL(1));
LOGICAL_POINTER(hole)[0] = TRUE;
SEXP poly;
PROTECT(poly = NEW_OBJECT(MAKE_CLASS("Polygon")));
SET_SLOT(poly, install("ringDir"), ringDir);
SET_SLOT(poly, install("labpt"), labpt);
SET_SLOT(poly, install("area"), area);
SET_SLOT(poly, install("hole"), hole);
SET_SLOT(poly, install("coords"), R_NilValue);
SET_VECTOR_ELT(polys, k, poly);
UNPROTECT(5);
comm[k] = 0;
areas[k] = 0;
po[k] = k + R_OFFSET;
// modified 131004 RSB
// https://stat.ethz.ch/pipermail/r-sig-geo/2013-October/019470.html
// warning("rgeos_geospolygon2Polygons: empty Polygons object");
error("rgeos_geospolygon2Polygons: empty Polygons object");
k++;
} else {
GEOSGeom lr = (GEOSGeometry *) GEOSGetExteriorRing_r(GEOShandle, GC);
if (lr == NULL)
error("rgeos_geospolygon2Polygons: exterior ring failure");
SET_VECTOR_ELT(polys, k, rgeos_geosring2Polygon(env, lr, FALSE));
comm[k] = 0;
areas[k] = NUMERIC_POINTER( GET_SLOT(VECTOR_ELT(polys,k), install("area")) )[0];
totalarea += areas[k];
po[k] = k + R_OFFSET;
int ownerk = k + R_OFFSET;
k++;
int nirs = GEOSGetNumInteriorRings_r(GEOShandle, GC);
for (int j=0; j<nirs; j++) {
lr = (GEOSGeometry *) GEOSGetInteriorRingN_r(GEOShandle, GC, j);
if (lr == NULL)
error("rgeos_geospolygon2Polygons: interior ring failure");
SET_VECTOR_ELT(polys, k, rgeos_geosring2Polygon(env, lr, TRUE));
comm[k] = ownerk;
areas[k] = NUMERIC_POINTER( GET_SLOT(VECTOR_ELT(polys,k), install("area")) )[0];
po[k] = k + R_OFFSET;
k++;
}
}
}
SEXP plotOrder;
PROTECT(plotOrder = NEW_INTEGER(npoly)); pc++;
revsort(areas, po, npoly);
for (int i=0; i<npoly; i++)
INTEGER_POINTER(plotOrder)[i] = po[i];
SEXP labpt = GET_SLOT(VECTOR_ELT(polys,po[0]-1), install("labpt"));
SEXP area;
PROTECT(area = NEW_NUMERIC(1)); pc++;
NUMERIC_POINTER(area)[0] = totalarea;
SEXP comment;
PROTECT(comment = NEW_CHARACTER(1)); pc++;
char *buf;
int nc;
nc = (int) (ceil(log10(npoly)+1.0))+1;
buf = (char *) R_alloc((size_t) (npoly*nc)+1, sizeof(char));
SP_PREFIX(comm2comment)(buf, (npoly*nc)+1, comm, npoly);
SET_STRING_ELT(comment, 0, mkChar((const char*) buf));
SEXP ans;
PROTECT(ans = NEW_OBJECT(MAKE_CLASS("Polygons"))); pc++;
SET_SLOT(ans, install("Polygons"), polys);
SET_SLOT(ans, install("plotOrder"), plotOrder);
SET_SLOT(ans, install("labpt"), labpt);
SET_SLOT(ans, install("ID"), ID);
SET_SLOT(ans, install("area"), area);
setAttrib(ans, install("comment"), comment);
UNPROTECT(pc);
return(ans);
}
SEXP rgeos_geosline2SpatialLines(SEXP env, GEOSGeom geom, SEXP p4s, SEXP idlist, int nlines) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
GEOSGeom curgeom;
GEOSGeom subgeom;
GEOSCoordSeq s;
int type = GEOSGeomTypeId_r(GEOShandle, geom);
if (type != GEOS_LINESTRING && type != GEOS_MULTILINESTRING &&
type != GEOS_LINEARRING && type != GEOS_GEOMETRYCOLLECTION ) {
error("rgeos_geosline2SpatialLines: invalid type");
}
if (nlines < 1) error("rgeos_geosline2SpatialLines: invalid number of geometries");
int pc=0;
if (nlines > length(idlist))
error("rgeos_geosline2SpatialLines: nlines > length(idlist)");
SEXP bbox, lines_list;
PROTECT(bbox = rgeos_geom2bbox(env, geom)); pc++;
PROTECT(lines_list = NEW_LIST(nlines)); pc++;
for(int j = 0; j < nlines; j++) {
curgeom = (type == GEOS_GEOMETRYCOLLECTION) ?
(GEOSGeom) GEOSGetGeometryN_r(GEOShandle, geom, j) :
geom;
if (curgeom == NULL)
error("rgeos_geosline2SpatialLines: unable to get geometry collection geometry");
int curtype = GEOSGeomTypeId_r(GEOShandle, curgeom);
int n = GEOSGetNumGeometries_r(GEOShandle, curgeom);
if (n == -1) error("rgeos_geosline2SpatialLines: invalid number of geometries in current geometry");
n = n ? n : 1;
SEXP line_list;
PROTECT(line_list = NEW_LIST(n));
for(int i = 0; i < n; i++) {
subgeom = (curtype == GEOS_MULTILINESTRING && !GEOSisEmpty_r(GEOShandle, curgeom)) ?
(GEOSGeom) GEOSGetGeometryN_r(GEOShandle, curgeom, i) :
curgeom;
if(subgeom == NULL) error("rgeos_geosline2SpatialLines: unable to get subgeometry");
SEXP crdmat;
if (GEOSisEmpty_r(GEOShandle, subgeom) == 0) {
s = (GEOSCoordSeq) GEOSGeom_getCoordSeq_r(GEOShandle, subgeom);
if (s == NULL)
error("rgeos_geosline2SpatialLines: unable to generate coordinate sequence");
PROTECT( crdmat = rgeos_CoordSeq2crdMat(env, s, FALSE, FALSE));
} else {
error("rgeos_geosline2SpatialLines: empty line found");
// PROTECT( crdmat = R_NilValue);
}
SEXP line;
PROTECT(line = NEW_OBJECT(MAKE_CLASS("Line")));
SET_SLOT(line, install("coords"), crdmat);
SET_VECTOR_ELT(line_list, i, line );
UNPROTECT(2);
}
SEXP lines;
PROTECT( lines = NEW_OBJECT(MAKE_CLASS("Lines")) );
SET_SLOT(lines, install("Lines"), line_list);
char idbuf[BUFSIZ];
strcpy(idbuf, CHAR( STRING_ELT(idlist, j) ));
SEXP id;
PROTECT( id = NEW_CHARACTER(1) );
SET_STRING_ELT(id, 0, COPY_TO_USER_STRING(idbuf));
SET_SLOT(lines, install("ID"), id);
SET_VECTOR_ELT( lines_list, j, lines );
UNPROTECT(3);
}
SEXP ans;
PROTECT(ans = NEW_OBJECT(MAKE_CLASS("SpatialLines"))); pc++;
SET_SLOT(ans, install("lines"), lines_list);
SET_SLOT(ans, install("bbox"), bbox);
SET_SLOT(ans, install("proj4string"), p4s);
UNPROTECT(pc);
return(ans);
}
Q_NOWARN_UNREACHABLE_PUSH
static GEOSGeometry *LWGEOM_GEOS_buildArea( const GEOSGeometry *geom_in, QString &errorMessage )
{
GEOSContextHandle_t handle = QgsGeos::getGEOSHandler();
GEOSGeometry *tmp = nullptr;
GEOSGeometry *shp = nullptr;
GEOSGeometry *geos_result = nullptr;
int srid = GEOSGetSRID_r( handle, geom_in );
GEOSGeometry const *vgeoms[1];
vgeoms[0] = geom_in;
try
{
geos_result = GEOSPolygonize_r( handle, vgeoms, 1 );
}
catch ( GEOSException &e )
{
errorMessage = QStringLiteral( "GEOSPolygonize(): %1" ).arg( e.what() );
return nullptr;
}
// We should now have a collection
#if PARANOIA_LEVEL > 0
if ( GEOSGeometryTypeId_r( handle, geos_result ) != COLLECTIONTYPE )
{
GEOSGeom_destroy_r( handle, geos_result );
errorMessage = "Unexpected return from GEOSpolygonize";
return nullptr;
}
#endif
int ngeoms = GEOSGetNumGeometries_r( handle, geos_result );
// No geometries in collection, early out
if ( ngeoms == 0 )
{
GEOSSetSRID_r( handle, geos_result, srid );
return geos_result;
}
// Return first geometry if we only have one in collection,
// to avoid the unnecessary Geometry clone below.
if ( ngeoms == 1 )
{
tmp = ( GEOSGeometry * )GEOSGetGeometryN_r( handle, geos_result, 0 );
if ( ! tmp )
{
GEOSGeom_destroy_r( handle, geos_result );
return nullptr;
}
shp = GEOSGeom_clone_r( handle, tmp );
GEOSGeom_destroy_r( handle, geos_result ); // only safe after the clone above
GEOSSetSRID_r( handle, shp, srid );
return shp;
}
/*
* Polygonizer returns a polygon for each face in the built topology.
*
* This means that for any face with holes we'll have other faces
* representing each hole. We can imagine a parent-child relationship
* between these faces.
*
* In order to maximize the number of visible rings in output we
* only use those faces which have an even number of parents.
*
* Example:
*
* +---------------+
* | L0 | L0 has no parents
* | +---------+ |
* | | L1 | | L1 is an hole of L0
* | | +---+ | |
* | | |L2 | | | L2 is an hole of L1 (which is an hole of L0)
* | | | | | |
* | | +---+ | |
* | +---------+ |
* | |
* +---------------+
*
* See http://trac.osgeo.org/postgis/ticket/1806
*
*/
// Prepare face structures for later analysis
Face **geoms = new Face*[ngeoms];
for ( int i = 0; i < ngeoms; ++i )
geoms[i] = newFace( GEOSGetGeometryN_r( handle, geos_result, i ) );
// Find faces representing other faces holes
findFaceHoles( geoms, ngeoms );
// Build a MultiPolygon composed only by faces with an
// even number of ancestors
tmp = collectFacesWithEvenAncestors( geoms, ngeoms );
// Cleanup face structures
for ( int i = 0; i < ngeoms; ++i )
delFace( geoms[i] );
delete [] geoms;
// Faces referenced memory owned by geos_result.
// It is safe to destroy geos_result after deleting them.
GEOSGeom_destroy_r( handle, geos_result );
// Run a single overlay operation to dissolve shared edges
shp = GEOSUnionCascaded_r( handle, tmp );
if ( !shp )
{
GEOSGeom_destroy_r( handle, tmp );
return nullptr;
}
GEOSGeom_destroy_r( handle, tmp );
GEOSSetSRID_r( handle, shp, srid );
return shp;
}
SEXP rgeos_convert_geos2R(SEXP env, GEOSGeom geom, SEXP p4s, SEXP id) {
GEOSContextHandle_t GEOShandle = getContextHandle(env);
int type = GEOSGeomTypeId_r(GEOShandle, geom);
int ng = GEOSGetNumGeometries_r(GEOShandle, geom);
if (ng == -1) error("rgeos_convert_geos2R: invalid number of subgeometries");
if (type == GEOS_GEOMETRYCOLLECTION && ng==0 && GEOSisEmpty_r(GEOShandle,geom)) {
GEOSGeom_destroy_r(GEOShandle, geom);
return(R_NilValue);
}
ng = ng ? ng : 1; // Empty MULTI type geometries return size 0
int pc=0;
SEXP ans=NULL;
switch(type) { // Determine appropriate conversion for the collection
case -1:
error("rgeos_convert_geos2R: unknown geometry type");
break;
case GEOS_POINT:
case GEOS_MULTIPOINT:
PROTECT( ans = rgeos_geospoint2SpatialPoints(env, geom, p4s, id, ng) ); pc++;
break;
case GEOS_LINEARRING:
PROTECT( ans = rgeos_geosring2SpatialRings(env, geom, p4s, id, ng)); pc++;
break;
case GEOS_LINESTRING:
case GEOS_MULTILINESTRING:
PROTECT( ans = rgeos_geosline2SpatialLines(env, geom, p4s, id, 1) ); pc++;
break;
case GEOS_POLYGON:
case GEOS_MULTIPOLYGON:
PROTECT( ans = rgeos_geospolygon2SpatialPolygons(env, geom,p4s, id, 1) ); pc++;
break;
case GEOS_GEOMETRYCOLLECTION:
{
int gctypes[] = {0,0,0,0,0,0,0,0};
int gctypen[] = {0,0,0,0,0,0,0,0};
int n=0;
int *types = (int *) R_alloc((size_t) ng, sizeof(int));
for (int i=0; i<ng; i++) {
const GEOSGeometry *subgeom = GEOSGetGeometryN_r(GEOShandle, geom, i);
if (subgeom == NULL)
error("rgeos_convert_geos2R: unable to retrieve subgeometry");
int ns = GEOSGetNumGeometries_r(GEOShandle, subgeom);
if (ns == -1) error("rgeos_convert_geos2R: invalid number of geometries in subgeometry");
ns = ns ? ns : 1;
n += ns;
types[i] = GEOSGeomTypeId_r(GEOShandle, subgeom);
if (types[i] == GEOS_GEOMETRYCOLLECTION) {
Rprintf("output subgeometry %d, row.name: %s\n", i,
CHAR(STRING_ELT(id, i)));
for (int ii=0; ii<ns; ii++)
Rprintf("subsubgeometry %d: %s\n", ii,
GEOSGeomType_r(GEOShandle,
GEOSGetGeometryN_r(GEOShandle, subgeom, ii)));
error("Geometry collections may not contain other geometry collections");
}
gctypes[ types[i] ] += 1;
gctypen[ types[i] ] += ns;
}
int isPoint = gctypes[GEOS_POINT] + gctypes[GEOS_MULTIPOINT];
int isLine = gctypes[GEOS_LINESTRING] + gctypes[GEOS_MULTILINESTRING];
int isPoly = gctypes[GEOS_POLYGON] + gctypes[GEOS_MULTIPOLYGON];
int isRing = gctypes[GEOS_LINEARRING];
int isGC = gctypes[GEOS_GEOMETRYCOLLECTION];
if ( isPoint && !isLine && !isPoly && !isRing && !isGC ) {
PROTECT( ans = rgeos_geospoint2SpatialPoints(env, geom, p4s, id, n) ); pc++;
} else if ( isLine && !isPoint && !isPoly && !isRing && !isGC ) {
PROTECT( ans = rgeos_geosline2SpatialLines(env, geom, p4s, id, ng) ); pc++;
} else if ( isPoly && !isPoint && !isLine && !isRing && !isGC ) {
PROTECT( ans = rgeos_geospolygon2SpatialPolygons(env, geom, p4s,id, ng) ); pc++;
} else if ( isRing && !isPoint && !isLine && !isPoly && !isGC ) {
PROTECT( ans = rgeos_geosring2SpatialRings(env, geom, p4s, id, ng) ); pc++;
} else {
//Rprintf("isPoint: %d isLine: %d isPoly: %d isRing: %d isGC: %d\n",isPoint, isLine, isPoly, isRing, isGC);
int m = MAX(MAX(MAX(isPoint,isLine),isPoly),isRing);
if (length(id) < m) {
char buf[BUFSIZ];
PROTECT(id = NEW_CHARACTER(m)); pc++;
for (int i=0;i<m;i++) {
sprintf(buf,"%d",i);
SET_STRING_ELT(id, i, COPY_TO_USER_STRING(buf));
}
}
GEOSGeom *GCS[4];
GCS[0] = (GEOSGeom *) R_alloc((size_t) isPoint, sizeof(GEOSGeom));
GCS[1] = (GEOSGeom *) R_alloc((size_t) isLine, sizeof(GEOSGeom));
GCS[2] = (GEOSGeom *) R_alloc((size_t) isRing, sizeof(GEOSGeom));
GCS[3] = (GEOSGeom *) R_alloc((size_t) isPoly, sizeof(GEOSGeom));
SEXP ptID, lID, rID, pID;
PROTECT(ptID = NEW_CHARACTER(isPoint)); pc++;
PROTECT(lID = NEW_CHARACTER(isLine)); pc++;
PROTECT(rID = NEW_CHARACTER(isRing)); pc++;
PROTECT(pID = NEW_CHARACTER(isPoly)); pc++;
int typei[] = {0,0,0,0};
for (int i=0; i<ng; i++) {
const GEOSGeometry *subgeom = GEOSGetGeometryN_r(GEOShandle, geom, i);
if (subgeom == NULL)
error("rgeos_convert_geos2R: unable to retrieve subgeometry");
int j = -1;
SEXP cur_id=NULL;
if (types[i]==GEOS_POINT || types[i]==GEOS_MULTIPOINT) {
j=0;
cur_id=ptID;
} else if (types[i]==GEOS_LINESTRING || types[i]==GEOS_MULTILINESTRING) {
j=1;
cur_id=lID;
} else if (types[i]==GEOS_LINEARRING) {
j=2;
cur_id=rID;
} else if (types[i]==GEOS_POLYGON || types[i]==GEOS_MULTIPOLYGON) {
j=3;
cur_id=pID;
}
if (GCS[j] == NULL)
error("rgeos_convert_geos2R: GCS element is NULL (this should never happen).");
GCS[j][ typei[j] ] = GEOSGeom_clone_r(GEOShandle, subgeom);
SET_STRING_ELT(cur_id, typei[j], STRING_ELT(id,typei[j]));
typei[j]++;
}
SEXP points = R_NilValue;
SEXP lines = R_NilValue;
SEXP rings = R_NilValue;
SEXP polys = R_NilValue;
if (isPoint) {
GEOSGeom ptGC = GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, GCS[0], (unsigned int) isPoint);
PROTECT( points = rgeos_convert_geos2R(env, ptGC, p4s, ptID) ); pc++;
}
if (isLine) {
GEOSGeom lGC = GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, GCS[1], (unsigned int) isLine);
PROTECT( lines = rgeos_convert_geos2R(env, lGC, p4s, lID) ); pc++;
}
if (isRing) {
GEOSGeom rGC = GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, GCS[2], (unsigned int) isRing);
PROTECT( rings = rgeos_convert_geos2R(env, rGC, p4s, rID) ); pc++;
}
if (isPoly) {
GEOSGeom pGC = GEOSGeom_createCollection_r(GEOShandle, GEOS_GEOMETRYCOLLECTION, GCS[3], (unsigned int) isPoly);
PROTECT( polys = rgeos_convert_geos2R(env, pGC, p4s, pID) ); pc++;
}
PROTECT(ans = NEW_OBJECT(MAKE_CLASS("SpatialCollections"))); pc++;
SET_SLOT(ans, install("proj4string"), p4s);
SET_SLOT(ans, install("pointobj"), points);
SET_SLOT(ans, install("lineobj"), lines);
SET_SLOT(ans, install("ringobj"), rings);
SET_SLOT(ans, install("polyobj"), polys);
SEXP plotOrder;
PROTECT(plotOrder = NEW_INTEGER(4)); pc++;
INTEGER_POINTER(plotOrder)[0] = 4;
INTEGER_POINTER(plotOrder)[1] = 3;
INTEGER_POINTER(plotOrder)[2] = 2;
INTEGER_POINTER(plotOrder)[3] = 1;
SET_SLOT(ans, install("plotOrder"), plotOrder);
SEXP bbox;
PROTECT(bbox = rgeos_geom2bbox(env, geom)); pc++;
SET_SLOT(ans, install("bbox"), bbox);
}
break;
}
default:
error("rgeos_convert_geos2R: Unknown geometry type");
}
GEOSGeom_destroy_r(GEOShandle, geom);
UNPROTECT(pc);
return(ans);
}
