--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/shared/Transform2D.java	Wed Jun 01 08:15:58 2011 +0000
@@ -0,0 +1,52 @@
+package de.intevation.flys.client.shared;
+
+import java.io.Serializable;
+
+
+/**
+ * This object supports a linear transformation to transform xy coordinates into
+ * an other coordinate system based on scale and translation values.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class Transform2D implements Serializable {
+
+    protected double sx;
+    protected double sy;
+
+    protected double tx;
+    protected double ty;
+
+
+    public Transform2D() {
+    }
+
+
+    /**
+     * Creates a new transformation with scale and translation factors.
+     *
+     * @param sx The scale factor for the x axis.
+     * @param sy The scale factor for the y axis.
+     * @param tx The translation factor for the x axis.
+     * @param ty The translation factor for the y axis.
+     */
+    public Transform2D(double sx, double sy, double tx, double ty) {
+        this.sx  = sx;
+        this.sy  = sy;
+        this.tx  = tx;
+        this.ty  = ty;
+    }
+
+
+    /**
+     * Transforms the pixel x and y into a new coordinate system based on the
+     * scale and translation values specified in the constructor.
+     */
+    public double[] transform(double x, double y) {
+        double resX = sx * x + tx;
+        double resY = sy * y + ty;
+
+        return new double[] { resX, resY };
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :