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Modules/awtool/AwtMetricsFC2.java

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+/*   
+AwtMetricsFC2.java
+ *    
+ *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Kimmo Wideroos
+ */
+ 
+package org.gzigzag.module;
+import org.gzigzag.*;
+import java.util.*;
+import java.awt.*;
+
+/** Focus+context metrics2
+ */
+
+
+public class AwtMetricsFC2 extends AwtMetrics {
+    public String getZObName() { 
+        return "Focus+Context (2)";
+    }
+
+    public double[] transformAtFocusNbhood(double x, double y, double focusCoeff) {
+        double dx, dy, x2, y2;
+
+        x2 = x*focusCoeff; 
+        y2 = y*focusCoeff;
+
+        if(x2<1 && x2>-1) {
+            dx = x2; 
+        } else {
+            dx = (x2>0) ? Math.sqrt(x2) : -Math.sqrt(-x2);
+        }
+
+        if(y2<1 && y2>-1) { 
+            dy = y2;
+        } else {
+            dy = (y2>0) ? Math.sqrt(y2) : -Math.sqrt(-y2);
+        }
+
+        return new double[] { dx/focusCoeff, dy/focusCoeff };
+    }
+
+    public double[] inverseTransformAtFocusNbhood(double x, double y, double focusCoeff) {
+        double dx, dy, x2, y2;
+
+        x2 = x*focusCoeff;
+        y2 = y*focusCoeff;
+
+        if(x2<1 && x2>-1) {
+            dx = x2; 
+        } else {
+            dx = x2*x2; 
+            dx = x2>0 ? dx : -dx;
+        }
+
+        if(y2<1 && y2>-1) { 
+            dy = y2;
+        } else {
+            dy = y2*y2; 
+            dy = y2>0 ? dy : -dy;
+        }
+
+        return new double[] { dx/focusCoeff, dy/focusCoeff };
+    } 
+
+    public double transformScalingValue(double s) { return s; }
+
+    public double focusCoefficientMinimum() { return 4.0; }
+    public double focusCoefficientMaximum() { return 8.0; }
+
+    public AwtMetricsFC2() { super(); }
+
+    public AwtMetricsFC2(ZZCell start, Dimension rv, Dimension vv, 
+                            double ox, double oy) { 
+        super(start, rv, vv, ox, oy);
+    }
+}
+