package resample

import "github.com/paulmach/orb/resample"

Package resample has a couple functions for resampling line geometry into more or less evenly spaces points.

Index

Examples

Functions

func Resample 

func Resample(ls orb.LineString, df orb.DistanceFunc, totalPoints int) orb.LineString

Resample converts the line string into totalPoints-1 evenly spaced segments. This function will modify the linestring input.

Example

Code:play  

package main

import (
	"fmt"

	"github.com/paulmach/orb"
	"github.com/paulmach/orb/planar"
	"github.com/paulmach/orb/resample"
)

func main() {
	ls := orb.LineString{
		{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0},
		{5, 0}, {6, 0}, {7, 0}, {8, 0}, {9, 0}, {10, 0},
	}

	// downsample in this case so there are 2.5 units between points
	ls = resample.ToInterval(ls, planar.Distance, 2.5)
	fmt.Println(ls)

}

Output:

[[0 0] [2.5 0] [5 0] [7.5 0] [10 0]]

func ToInterval 

func ToInterval(ls orb.LineString, df orb.DistanceFunc, dist float64) orb.LineString

ToInterval coverts the line string into evenly spaced points of about the given distance. This function will modify the linestring input.

Example

Code:play  

package main

import (
	"fmt"

	"github.com/paulmach/orb"
	"github.com/paulmach/orb/planar"
	"github.com/paulmach/orb/resample"
)

func main() {
	ls := orb.LineString{{0, 0}, {10, 0}}

	// upsample so there are 6 total points
	ls = resample.Resample(ls, planar.Distance, 6)
	fmt.Println(ls)

}

Output:

[[0 0] [2 0] [4 0] [6 0] [8 0] [10 0]]

Source Files

line_string.go

Version
v0.11.1 (latest)
Published
Jan 29, 2024
Platform
js/wasm
Imports
1 packages
Last checked
1 day ago –

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