Improvements of Freestyle GUI controls - Part 1.

This commit makes a set of fixes and improvements based on the results of
Freestyle branch review by Brecht.  The discussion thread is:
http://lists.blender.org/pipermail/bf-committers/2012-October/037927.html

* The Layers panel and Freestyle-related panels in the Render tab of the
Properties window were moved to the newly created Render Layers tab.
The idea is to separate per render layer rendering options into a distinct
Properties window tab, and use the existing Render tab to accommodate
per scene rendering options.

* The new Freestyle panel was added in the Render tab.  The panel header
contains a toggle button for globally enabling Freestyle, with the aim of making
Freestyle easier to find.  Those Freestyle options in the Post Processing panel
were also moved to the new panel. 

* GUI code was updated so that UI controls will be greyed out (instead of
being hidden) when Freestyle is disabled.  Additional UI changes were also
made to reduce space consumption.

* The list of line sets was moved from the Freestyle panel to the Freestyle:
Line Sets panel.

* Old ray-casting algorithms were removed from the UI.  Now only two
algorithms (culled and non-culled cumulative visibility detection algorithms)
are available, and the selection is done by the new "Culling" toggle button
within the edge detection options.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_freestyle_types.h b/source/blender/makesdna/DNA_freestyle_types.h
index f6e9421fa34..b78ea9a13bb 100644
--- a/source/blender/makesdna/DNA_freestyle_types.h
+++ b/source/blender/makesdna/DNA_freestyle_types.h
@@ -41,6 +41,7 @@ struct FreestyleLineStyle;
 #define FREESTYLE_MATERIAL_BOUNDARIES_FLAG  4
 #define FREESTYLE_FACE_SMOOTHNESS_FLAG      8
 #define FREESTYLE_ADVANCED_OPTIONS_FLAG     16
+#define FREESTYLE_CULLING                   32
 
 /* FreestyleConfig::mode */
 #define FREESTYLE_CONTROL_SCRIPT_MODE  1
@@ -120,7 +121,7 @@ typedef struct FreestyleConfig {
 	ListBase modules;
 	
 	int mode; /* scripting, editor */
-	int raycasting_algorithm; /* regular, fast, very fast, etc. */
+	int raycasting_algorithm; /* XXX deprecated */
 	int flags; /* suggestive contours, ridges/valleys, material boundaries */
 	float sphere_radius;
 	float dkr_epsilon;