spreader

package

v0.3.1 Latest Latest Go to latest Published: Sep 26, 2021 License: MIT Imports: 12 Imported by: 0

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func MakeSpreaders(fc *geojson.FeatureCollection, prop string, qt *quadtree.Quadtree) <-chan *Spreader

MakeSpreaders returns a chan of Spreader structs to efficiently process all features

type Spreader struct {
	Feature        *geojson.Feature
	AggregateValue float64
	SpreadFeatures []*geojson.Feature
}

Spreader manages spreading a Feature into SpreadFeatures based on the AggregateValue

func NewSpreader(feat *geojson.Feature, features []*geojson.Feature, prop string) (*Spreader, error)

NewSpreader creates a Spreader, returning nil if the property value cannot be parsed

func (s *Spreader) Spread() []orb.Point

Spread returns a slice of points distributed throughout spread features

func (s *Spreader) TotalSpreadValue() float64

TotalSpreadValue returns the amount to use for spreading points inside a feature (currently area)