--- a/doodle/tk/geometry.d	Sun Aug 15 15:19:14 2010 +0930
+++ b/doodle/tk/geometry.d	Sun Aug 15 23:18:05 2010 +0930
@@ -113,7 +113,8 @@
     }
 }
 
-Vector normalise(in Vector v) {
+/*
+Vector normal(in Vector v) {
     double l = v.length;
 
     if (l < 1e-9) {         // TODO consolidate numerical stability constants
@@ -124,6 +125,7 @@
         return v / l;
     }
 }
+*/
 
 //
 // A rectangle in 2D space.
@@ -152,12 +154,12 @@
         this(corner1.x, corner1.y, corner.x - corner1.x, corner.y - corner1.y);
     }
 
-    double x0() { return _position.x; }
-    double y0() { return _position.y; }
-    double w()  { return _size.x; }
-    double h()  { return _size.y; }
-    double x1() { return x0 + w; }
-    double y1() { return y0 + h; }
+    double x0() const { return _position.x; }
+    double y0() const { return _position.y; }
+    double w()  const { return _size.x; }
+    double h()  const { return _size.y; }
+    double x1() const { return x0 + w; }
+    double y1() const { return y0 + h; }
 
     alias position corner0;
     Point position() const { return _position; }
@@ -236,9 +238,18 @@
     }
 }
 
+Rectangle growCentre(in Rectangle r, in Vector amount) {
+    return Rectangle(r.x0 - amount.x / 2, r.y0 - amount.y / 2, r.w + amount.x, r.h + amount.y);
+}
+
+Rectangle growCentre(in Rectangle r, in double amount) {
+    return Rectangle(r.x0 - amount / 2, r.y0 - amount / 2, r.w + amount, r.h + amount);
+}
+
 // TODO review these functions.
 // Want a clear and simple set.
 
+/+
 Rectangle move(in Rectangle r, in Vector displacement) {
     return Rectangle(r.position + displacement, r.size);
 }
@@ -260,15 +271,18 @@
 Rectangle shrink(in Rectangle r, in Vector shrink_amount) {
     return Rectangle(r.position, r.size - shrink_amount);
 }
++/
 
 // Operations about the centre
 
+/+
 Rectangle feather(in Rectangle r, double amount) {          // feather isn't the right name
     assert(amount >= 0.0);
     assert(!isnan(amount));
     return Rectangle(Point(r.position.x - amount, r.position.y - amount),
                      Vector(r.size.x + 2.0 * amount, r.size.y + 2.0 * amount));
 }
++/
 
 private {
     // This function computes the intersection of two lines.
@@ -388,9 +402,11 @@
     }
 }
 
+/*
 Segment reverse(in Segment s) {
     return Segment(s.end, s.begin);
 }
+*/
 
 bool intersection(in Segment a, in Segment b, out Point p) {
     Point pa1 = a.begin;