func (this *Geos) MultiPolygon(polygons []*Geom) *Geom {
if len(polygons) == 0 {
return nil
}
polygonPtr := make([]*C.GEOSGeometry, len(polygons))
for i, geom := range polygons {
polygonPtr[i] = geom.v
}
geom := C.GEOSGeom_createCollection_r(this.v, C.GEOS_MULTIPOLYGON, &polygonPtr[0], C.uint(len(polygons)))
if geom == nil {
return nil
}
return &Geom{geom}
}
func (this *Geos) MultiLineString(lines []*Geom) *Geom {
if len(lines) == 0 {
return nil
}
linePtr := make([]*C.GEOSGeometry, len(lines))
for i, geom := range lines {
linePtr[i] = geom.v
}
geom := C.GEOSGeom_createCollection_r(this.v, C.GEOS_MULTILINESTRING, &linePtr[0], C.uint(len(lines)))
if geom == nil {
return nil
}
return &Geom{geom}
}
func cGEOSGeom_createCollection(_type C.int, geoms **C.GEOSGeometry, ngeoms C.uint) *C.GEOSGeometry {
handlemu.Lock()
defer handlemu.Unlock()
return C.GEOSGeom_createCollection_r(handle, _type, geoms, ngeoms)
}