polylabel-java
A Java port of PolyLabel from MapBox.
Official repo: https://github.com/mapbox/polylabel
Article: https://blog.mapbox.com/a-new-algorithm-for-finding-a-visual-center-of-a-polygon-7c77e6492fbc
Requirements
Installation
Add polylabel-java to your local .m2 folder with the following commands:
git clone https://github.com/FreshLlamanade/polylabel-java
cd polylabel-java
mvn clean install
Then add the following dependency to your pom.xml:
<groupId>com.monst</groupId>
<artifactId>polylabel-java</artifactId>
<version>1.2.1</version>
Usage
Using default precision (1.0), no console messages:
PolyLabel result = PolyLabel.polyLabel(new Integer[][][] {{{0, 0}, {10, 0}, {0, 10}}})
// result.getCoordinates() -> {3.125, 3.125}Using precision of 0.5, no console messages:
PolyLabel result = PolyLabel.polyLabel(new Integer[][][] {{{0, 0}, {10, 0}, {0, 10}}}, 0.5)
// result.getCoordinates() -> {2.8125, 2.8125}Using precision of 0.5, with console messages:
PolyLabel result = PolyLabel.polyLabel(new Integer[][][] {{{0, 0}, {10, 0}, {0, 10}}}, 0.5, true)
// Found best 2.50 after 5 probes
//
// Found best 2.65 after 21 probes
//
// Found best 2.81 after 25 probes
//
// Num probes: 25
// Best distance: 2.812500
//
// result.getCoordinates() -> {2.8125, 2.8125}