--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/java2d/ShapeUtils.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,83 @@
+package org.dive4elements.river.java2d;
+
+import java.awt.Shape;
+
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Ellipse2D;
+import java.awt.geom.GeneralPath;
+import java.awt.geom.Rectangle2D;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ShapeUtils
+{
+    // TODO: Use enum
+    public static final int MEASURED     = 0;
+    public static final int DIGITIZED    = 1;
+    public static final int INTERPOLATED = 2;
+
+    public static final boolean DIGITIZED_FILL    = false;
+    public static final boolean MEASURED_FILL     = true;
+    public static final boolean INTERPOLATED_FILL = false;
+
+   public static final Shape DIGITIZED_SHAPE =
+        createCross(4f);
+
+    public static final Shape MEASURED_SHAPE =
+        new Rectangle2D.Double(-2, -2, 4, 4);
+
+    public static final Shape INTERPOLATED_SHAPE =
+        new Ellipse2D.Double(-2, -2, 4, 4);
+
+    protected static Map<Long, Shape> scaledShapesCache =
+        new HashMap<Long, Shape>();
+
+    public static final Shape createCross(float size) {
+        float half = size * 0.5f;
+        GeneralPath p = new GeneralPath();
+        p.moveTo(-half, -half);
+        p.lineTo(half, half);
+        p.closePath();
+        p.moveTo(-half, half);
+        p.lineTo(half, -half);
+        p.closePath();
+        return p;
+    }
+
+    public static Shape scale(Shape shape, float factor) {
+        if (factor == 1f) {
+            return shape;
+        }
+        AffineTransform xform =
+            AffineTransform.getScaleInstance(factor, factor);
+
+        GeneralPath gp = new GeneralPath(shape);
+        return gp.createTransformedShape(xform);
+    }
+
+    public static synchronized Shape getScaledShape(int type, float size) {
+
+        Long hash = Long.valueOf(
+            (((long)type) << 32) | Float.floatToIntBits(size));
+
+        Shape shape = scaledShapesCache.get(hash);
+
+        if (shape == null) {
+            switch (type) {
+                case MEASURED:
+                    shape = MEASURED_SHAPE;
+                    break;
+                case DIGITIZED:
+                    shape = DIGITIZED_SHAPE;
+                    break;
+                default:
+                    shape = INTERPOLATED_SHAPE;
+            }
+            scaledShapesCache.put(hash, shape = scale(shape, size));
+        }
+
+        return shape;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :