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multi_pointzm.go
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/
multi_pointzm.go
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package geom
import "errors"
// ErrNilMultiPointZM is thrown when a MultiPointZM is nil but shouldn't be
var ErrNilMultiPointZM = errors.New("geom: nil MultiPointZM")
// MultiPointZM is a geometry with multiple 3+1D points.
type MultiPointZM [][4]float64
// Points returns the coordinates for the 3+1D points
func (mpzm MultiPointZM) Points() [][4]float64 {
return mpzm
}
// SetPoints modifies the array of 3+1D coordinates
func (mpzm *MultiPointZM) SetPoints(input [][4]float64) (err error) {
if mpzm == nil {
return ErrNilMultiPointZM
}
*mpzm = append((*mpzm)[:0], input...)
return
}
// Get the simple 2D multipoint
func (mpzm MultiPointZM) MultiPoint() MultiPoint {
var mpv [][2]float64
var mp MultiPoint
points := mpzm.Points()
for i := 0; i < len(points); i++ {
mpv = append(mpv, [2]float64{points[i][0], points[i][1]})
}
mp.SetPoints(mpv)
return mp
}