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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.klimt.geom;
public class CoordinateChange {
private final double x1;
private final double y1;
private final double x2;
private final double y2;
private final double vect_u_x;
private final double vect_u_y;
private final double vect_v_x;
private final double vect_v_y;
private final double len;
public static CoordinateChange create(XPoint2D p1, XPoint2D p2) {
return new CoordinateChange(p1.getX(), p1.getY(), p2.getX(), p2.getY());
}
public CoordinateChange(double x1, double y1, double x2, double y2) {
this.x1 = x1;
this.y1 = y1;
this.x2 = x2;
this.y2 = y2;
this.len = XPoint2D.distance(x1, y1, x2, y2);
if (this.len == 0) {
throw new IllegalArgumentException();
}
this.vect_u_x = (x2 - x1) / len;
this.vect_u_y = (y2 - y1) / len;
this.vect_v_x = -this.vect_u_y;
this.vect_v_y = this.vect_u_x;
}
public XPoint2D getTrueCoordinate(double a, double b) {
final double x = a * vect_u_x + b * vect_v_x;
final double y = a * vect_u_y + b * vect_v_y;
return new XPoint2D(x1 + x, y1 + y);
}
public final double getLength() {
return len;
}
}