net.sourceforge.plantuml.svek.image.Circle Maven / Gradle / Ivy

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PlantUML is a component that allows to quickly write diagrams from text.

There is a newer version: 1.2024.8

// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package net.sourceforge.plantuml.svek.image;

import net.sourceforge.plantuml.klimt.geom.XPoint2D;

public class Circle {

	private XPoint2D center;

	private double radius;

	public Circle() {
		this(new XPoint2D(0, 0));
	}

	public Circle(XPoint2D center) {
		this.center = center;
		this.radius = 0;
	}

	public Circle(XPoint2D p1, XPoint2D p2) {
		center = new XPoint2D((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
		radius = p1.distance(center);
	}

	public static Circle getCircle(XPoint2D p1, XPoint2D p2, XPoint2D p3) {
		if (p3.getY() != p2.getY()) {
			return new Circle(p1, p2, p3);
		}
		return new Circle(p2, p1, p3);
	}

	private Circle(XPoint2D p1, XPoint2D p2, XPoint2D p3) {
		final double num1 = p3.getX() * p3.getX() * (p1.getY() - p2.getY())
				+ (p1.getX() * p1.getX() + (p1.getY() - p2.getY()) * (p1.getY() - p3.getY())) * (p2.getY() - p3.getY())
				+ p2.getX() * p2.getX() * (-p1.getY() + p3.getY());
		final double den1 = 2 * (p3.getX() * (p1.getY() - p2.getY()) + p1.getX() * (p2.getY() - p3.getY())
				+ p2.getX() * (-p1.getY() + p3.getY()));
		final double x = num1 / den1;
		final double den2 = p3.getY() - p2.getY();
		final double y = (p2.getY() + p3.getY()) / 2
				- (p3.getX() - p2.getX()) / den2 * (x - (p2.getX() + p3.getX()) / 2);
		center = new XPoint2D(x, y);
		radius = center.distance(p1);
	}

	public XPoint2D getCenter() {
		return center;
	}

	public double getRadius() {
		return radius;
	}

	public boolean isOutside(XPoint2D point) {
		final double d = center.distance(point);
		if (d > radius) {
			return true;
		}
		return false;
	}

}