coordinates.rb in ctioga2-0.1

- old
+ new
@@ -15,22 +15,39 @@
 require 'ctioga2/log'
 
 
 module CTioga2
 
-  Version::register_svn_info('$Revision: 2 $', '$Date: 2009-04-25 14:03:30 +0200 (Sat, 25 Apr 2009) $')
+  Version::register_svn_info('$Revision: 177 $', '$Date: 2010-10-25 13:22:39 +0200 (Mon, 25 Oct 2010) $')
 
   module Graphics
 
     # Deals with transforming the coordinates of all datasets
     #
-    # TODO:
+    # \todo
     # * offsets
     # * scales
     # * x/y log
     # * non-linear transformations ?
     # * the possibility to provide locations using this.
     # * conversion of datasets.
+    #
+    # \todo Shouldn't this facility be axis-local ? Non-linear
+    # transformations definitely belong there as well (and that would
+    # be almost trivial to write !).
+    #
+    # @todo For now, this is a mess: these things completely mess up
+    # the data processing... This is a complex problem:
+    # 
+    # * if the Dataset are modified in place, this is a nightmare for
+    #   data processing
+    #   
+    # * on the other hand, if they are not modified in place, this
+    #   means that things that work on data sets and show things on
+    #   the plot (think TangentPrimitive, for instance) will have to
+    #   do additional things to get the target coordinates. This is
+    #   probably the best way to go, though... This would need some
+    #   functions to work directly on XY coordinates.
     class CoordinateTransforms
 
       # A scaling factor for coordinates:
       attr_accessor :x_scale, :y_scale
 