--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/math/LinearMetrics.java	Tue Dec 15 15:58:58 2009 +0000
@@ -0,0 +1,63 @@
+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: