World space switch for BI nodes.

At the moment light shading in Blender is produced in viewspace. Apparently, that's why
shader nodes work with normals in camera space. But it is not convenient for artists.
The more convenient approach is implemented in Cycles where normals are represented in world space.
Blend4Web Team designed the engine keeping in mind shader parameters readability,
so normals are interpreted in world space as well. And now our users have to use some tweaks, like
empty node group with the name "Replace", which is replacing one input by another on the engine side
(replacing working configuration in Blender Viewport by the configuration that has the same behavior in the engine).

This patch adds the ability to switch to world space for normals and lamp vector in BI and Viewport.
This patch is very important to us and we crave to see this patch in Blender 2.7 because
it will significantly simplify Blend4Web material creation workflow.

{F315547}

{F315548}

Reviewers: campbellbarton, brecht

Reviewed By: brecht

Subscribers: homyachetser, Evgeny_Rodygin, AlexKowel, yurikovelenov

Differential Revision: https://developer.blender.org/D2046

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index 1bf044ffecb..79af1813a8f 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -1639,6 +1639,7 @@ typedef struct Scene {
 #define R_SIMPLIFY			0x1000000
 #define R_EDGE_FRS			0x2000000 /* R_EDGE reserved for Freestyle */
 #define R_PERSISTENT_DATA	0x4000000 /* keep data around for re-render */
+#define R_USE_WS_SHADING	0x8000000 /* use world space interpretation of lighting data */
 
 /* seq_flag */
 #define R_SEQ_GL_PREV 1