Three features;

- Live scanline updates while rendering
Using a timer system, each second now the tiles that are being processed
are checked if they could use display.
To make this work pretty, I had to use the threaded 'tile processor' for
a single thread too, but that's now proven to be stable.

Also note that these updates draw per layer, including ztransp progress
separately from solid render.

- Recode of ztransp OSA
Until now (since blender 1.0) the ztransp part was fully rendered and
added on top of the solid part with alpha-over. This adding was done before
the solid part applied sub-pixel sample filtering, causing the ztransp
layer to be always too blurry.

Now the ztransp layer uses same sub=pixel filter, resulting in the same
AA level (and filter results) as the solid part. Quite noticable with hair
renders.

- Vector buffer support & preliminary vector-blur Node
Using the "Render Layer" panel "Vector" pass button, the motion vectors
per pixel are calculated and stored. Accessible via the Compositor.

The vector-blur node is horrible btw! It just uses the length of the
vector to apply a filter like with current (z)blur. I'm committing it anyway,
I'll experiment with it further, and who knows some surprise code shows up!

2 files changed, 12 insertions, 4 deletions

diff --git a/source/blender/render/extern/include/RE_pipeline.h b/source/blender/render/extern/include/RE_pipeline.h
index d34fc968e77..a9b75184e36 100644
--- a/source/blender/render/extern/include/RE_pipeline.h
+++ b/source/blender/render/extern/include/RE_pipeline.h
@@ -65,8 +65,9 @@ typedef struct RenderLayer {
 	unsigned int lay;			
 	int layflag, passflag;		
 	
-	float *rectf;	/* standard rgba buffer */
-	float *rectz;	/* standard camera coordinate zbuffer */
+	float *rectf;	/* 4 float, standard rgba buffer */
+	float *rectz;	/* 1 float, standard camera coordinate zbuffer */
+	float *rectvec;	/* 2 float, screen aligned speed vectors */
 	
 	ListBase passes;
 	
@@ -90,7 +91,10 @@ typedef struct RenderResult {
 	
 	/* the main buffers */
 	ListBase layers;
-	int actlay;				/* copy of renderdata..., so display callbacks can find out */
+	
+	/* allowing live updates: */
+	rcti renrect;
+	RenderLayer *renlay;
 	
 	/* optional saved endresult on disk */
 	char exrfile[FILE_MAXDIR];
diff --git a/source/blender/render/extern/include/RE_shader_ext.h b/source/blender/render/extern/include/RE_shader_ext.h
index 3524523f9bc..b8bd46d784e 100644
--- a/source/blender/render/extern/include/RE_shader_ext.h
+++ b/source/blender/render/extern/include/RE_shader_ext.h
@@ -45,9 +45,12 @@ typedef struct TexResult {
 /* localized shade result data */
 typedef struct ShadeResult 
 {
+	float combined[4];
 	float diff[3];
 	float spec[3];
 	float alpha;
+	float nor[3];
+	float winspeed[2];
 	
 } ShadeResult;
 
@@ -76,7 +79,8 @@ typedef struct ShadeInput
 	
 	/* texture coordinates */
 	float lo[3], gl[3], uv[3], ref[3], orn[3], winco[3], sticky[3], vcol[3], rad[3];
-	float vn[3], vno[3], facenor[3], view[3], refcol[4], displace[3], strand, tang[3], stress;
+	float vn[3], vno[3], facenor[3], view[3], refcol[4], displace[3];
+	float strand, tang[3], stress, winspeed[3];
 	
 	/* dx/dy OSA coordinates */
 	float dxco[3], dyco[3];