/*
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 * Image processing operations for SciJava Ops.
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package org.scijava.ops.image.geom.geom3d;

import java.util.function.Function;

import net.imglib2.mesh.Mesh;
import net.imglib2.type.numeric.real.DoubleType;

import org.scijava.function.Computers;
import org.scijava.ops.spi.OpDependency;

/**
 * Generic implementation of {@code geom.sphericity}. Based on
 * https://en.wikipedia.org/wiki/Sphericity.
 *
 * @author Tim-Oliver Buchholz (University of Konstanz)
 * @implNote op names='geom.sphericity', label='Geometric (3D): Sphericity',
 *           priority='10000.'
 */
public class DefaultSphericity implements Computers.Arity1<Mesh, DoubleType> {

	@OpDependency(name = "geom.size")
	private Function<Mesh, DoubleType> volumeFunc;
	@OpDependency(name = "geom.boundarySize")
	private Function<Mesh, DoubleType> areaFunc;

	/**
	 * TODO
	 *
	 * @param input
	 * @param sphericity
	 */
	@Override
	public void compute(final Mesh input, final DoubleType sphericity) {
		final var sphereArea = Math.pow(Math.PI, 1 / 3d) * Math.pow(6 *
			volumeFunc.apply(input).get(), 2 / 3d);
		sphericity.set(sphereArea / areaFunc.apply(input).get());
	}

}
