Exemple #1
0
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}
}
Exemple #2
0
func (this *Geos) CreatePolygon(shell *Geom, holes []*Geom) *Geom {
	if len(holes) > 0 {
		panic("holes not implemented")
	}
	polygon := C.GEOSGeom_createPolygon_r(this.v, shell.v, nil, 0)
	if polygon == nil {
		return nil
	}
	return &Geom{polygon}
}
Exemple #3
0
func cGEOSGeom_createPolygon(shell *C.GEOSGeometry, holes **C.GEOSGeometry, nholes C.uint) *C.GEOSGeometry {
	handlemu.Lock()
	defer handlemu.Unlock()
	return C.GEOSGeom_createPolygon_r(handle, shell, holes, nholes)
}