// MVT needs relative point instead of absolute
func (f *Feature) relativeGeometry() (geom *Geometry) {
//TODO if RelCur -> skip translation
geom = newGeometry(f.gtype, f.shapes...)
cur := Point{X: 0, Y: 0}
if f.id != nil {
util.Debug("Feature Geometry id: %d", *f.id)
} else {
util.Debug("Feature Geometry <nil>")
}
for k, v := range f.props {
util.Debug("\t%v: %v", k, v)
}
for i, shape := range f.shapes {
if f.gtype == vt.Tile_POLYGON {
shape.points = shape.points[:len(shape.points)-1]
}
shape.geomType = f.gtype
util.Debug("\tShape %d", i)
for i, point := range shape.points {
diff := point.Subtract(cur)
shape.points[i] = diff
cur = point
util.Debug("\t\t%v", cur)
}
shape.curType = RelCur
}
return
}
func readHeaders(reader *csv.Reader, filter mapset.Set) (headers map[string]int) {
line, err := reader.Read()
util.Warn(err, "reading headers")
headers = make(map[string]int, len(line))
for i, k := range line {
//if _, ok := c.fields[k]; !ok {
k = util.Slugged(k, "_")
if filter == nil || filter.Contains(k) {
headers[k] = i
}
//}
}
util.Debug("Headers %v", headers)
return
}