Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/math/LinearMetrics.java @ 360:ee760729f6b8
Added mapping from linear diagram space to 2D map coordinates.
gnv-artifacts/trunk@434 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 15 Dec 2009 15:58:58 +0000 |
parents | |
children | aec85d00d82c |
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package de.intevation.gnv.math; import java.awt.geom.Point2D; import de.intevation.gnv.math.LinearToMap.Metrics; import de.intevation.gnv.math.LinearToMap.Interpolator; /** * @author Sascha L. Teichmann */ public final class LinearMetrics implements Metrics { public static final Metrics INSTANCE = new LinearMetrics(); public static final class LinearInterpolator implements Interpolator { private double mx; private double bx; private double my; private double by; public LinearInterpolator(Point2D p1, Point2D p2) { /* I) p1.x = 0*m + bx II) p2.x = 1*m + bx bx = p1.x p2.x = m + p1.x mx = p2.x - p1.x */ bx = p1.getX(); mx = p2.getX() - bx; by = p1.getY(); my = p2.getY() - by; } public void interpolate(double t, Point2D v) { double x = t*mx + bx; double y = t*my + by; v.setLocation(x, y); } } // class LinearInterpolator private LinearMetrics() { } public double distance(Point2D p1, Point2D p2) { return p1.distance(p2); } public Interpolator getInterpolator(Point2D p1, Point2D p2) { return new LinearInterpolator(p1, p2); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: