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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package net.sourceforge.plantuml.svek;
import java.awt.geom.AffineTransform;
import net.sourceforge.plantuml.klimt.UShape;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;
import net.sourceforge.plantuml.klimt.shape.UDrawable;
import net.sourceforge.plantuml.klimt.shape.UEllipse;
class CircleAndArrow implements UDrawable {
private final AffineTransform at;
private final AffineTransform at2;
private int radius;
private final XPoint2D center;
private final XPoint2D p1;
private final XPoint2D p2;
private XPoint2D p3;
private XPoint2D p4;
public CircleAndArrow(XPoint2D p1, XPoint2D p2) {
this.center = new XPoint2D((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
at = AffineTransform.getTranslateInstance(-center.getX(), -center.getY());
at2 = AffineTransform.getTranslateInstance(center.getX(), center.getY());
radius = (int) (p1.distance(p2) / 2);
if (radius % 2 == 0) {
radius--;
}
this.p1 = putOnCircle(p1);
this.p2 = putOnCircle(p2);
this.p3 = this.p1.transform(at);
this.p3 = new XPoint2D(p3.getY(), -p3.getX());
this.p3 = this.p3.transform(at2);
this.p4 = this.p2.transform(at);
this.p4 = new XPoint2D(p4.getY(), -p4.getX());
this.p4 = this.p4.transform(at2);
}
private XPoint2D putOnCircle(XPoint2D p) {
p = p.transform(at);
final double coef = p.distance(new XPoint2D(0, 0)) / radius;
p = new XPoint2D(p.getX() / coef, p.getY() / coef);
return p.transform(at2);
}
public void drawU(UGraphic ug) {
final UShape circle = UEllipse.build(radius * 2, radius * 2);
ug.apply(new UTranslate(center.getX() - radius, center.getY() - radius)).draw(circle);
// drawLine(ug, x, y, p1, p2);
// drawLine(ug, x, y, p3, p4);
}
}
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