diff --git a/hurricane/doc/hurricane/Transformation.dox b/hurricane/doc/hurricane/Transformation.dox
index daa4a0ae..560a6e7b 100644
--- a/hurricane/doc/hurricane/Transformation.dox
+++ b/hurricane/doc/hurricane/Transformation.dox
@@ -21,40 +21,83 @@
/*! \class Transformation::Orientation
- * This enumeration defines the orientation associated to a
- * transformation object.
- *
+ * Orientation codes and associated transformation matrix
+ *
+ * Name | Aspect | Code | Signification | a | b | c | d |
+ *
+ *
+ * ID |
+ *
+ * \image html id.gif
+ * |
+ * 0 | Identity |
+ * 1 | 0 | 0 | 1 |
+ *
+ *
+ * R1 |
+ *
+ * \image html r1.gif
+ * |
+ * 1 | Simple rotation (90°) |
+ * 0 | -1 | 1 | 0 |
+ *
+ *
+ * R2 |
+ *
+ * \image html r2.gif
+ * |
+ * 2 | Double rotation (180°) |
+ * -1 | 0 | 0 | -1 |
+ *
+ *
+ * R3 |
+ *
+ * \image html r3.gif
+ * |
+ * 3 | Triple rotation (270°) |
+ * 0 | 1 | -1 | 0 |
+ *
+ *
+ * MX |
+ *
+ * \image html mx.gif
+ * |
+ * 4 | Horizontal symetry (Mirror X) |
+ * -1 | 0 | 0 | 1 |
+ *
+ *
+ * XR |
+ *
+ * \image html xr.gif
+ * |
+ * 5 | Horizontal symetry followed by a 90° rotation |
+ * 0 | -1 | -1 | 0 |
+ *
+ *
+ * MY |
+ *
+ * \image html my.gif
+ * |
+ * 6 | Vertical symetry (Mirror Y) |
+ * 1 | 0 | 0 | -1 |
+ *
+ *
+ * YR |
+ *
+ * \image html yr.gif
+ * |
+ * 7 | Vertical symetry followed by a 90° rotation |
+ * 0 | 1 | 1 | 0 |
+ *
+ *
*
* The transformation formula is given by : x' = (a * x) + (b *
- * y) + tx y' = (c * x) + (d * y) + ty Where x and y are the
+ * y) + tx y' = (c * x) + (d * y) + ty where x and y are the
* coordinates of any point, x' and y' the coordinates of the
- * trasformed point, tx and ty the horizontal and vertical
+ * transformed point, tx and ty the horizontal and vertical
* components of the translation and where a, b, c and d are the
* coefficients of the matrix associated to the orientation.
*