func (this *Geos) Polygon(exterior *Geom, interiors []*Geom) *Geom {
if len(interiors) == 0 {
geom := C.GEOSGeom_createPolygon_r(this.v, exterior.v, nil, C.uint(0))
if geom == nil {
return nil
}
err := C.GEOSNormalize_r(this.v, geom)
if err != 0 {
C.GEOSGeom_destroy(geom)
return nil
}
return &Geom{geom}
}
interiorPtr := make([]*C.GEOSGeometry, len(interiors))
for i, geom := range interiors {
interiorPtr[i] = geom.v
}
geom := C.GEOSGeom_createPolygon_r(this.v, exterior.v, &interiorPtr[0], C.uint(len(interiors)))
if geom == nil {
return nil
}
err := C.GEOSNormalize_r(this.v, geom)
if err != 0 {
C.GEOSGeom_destroy(geom)
return nil
}
return &Geom{geom}
}
func destroyGeom(geom *Geom) {
C.GEOSGeom_destroy(geom.v)
}
func DestroyPt(p Point) {
C.GEOSGeom_destroy(p.pointptr)
}
func GeosDestroy(geom Geom) {
C.GEOSPreparedGeom_destroy(geom.preped)
C.GEOSGeom_destroy(geom.geom)
}