[Bf-committers] Node Refactor

[Bob Holcomb]

First, sorry for the long email.  It's got "stuff" in it, but I think it 
may be helpful.  I've been working on the node refactor for the last 
couple of weeks between my day job and real life.  I presented what I 
had to Ton earlier today and would like to get the rest of the 
communities opinion.  I have removed all of node_composite.c and 
node_shader.c from the blenkernel directory as well as many of the 
functions from drawnode.c and node.c (some of the rendering functions 
will be restored). 

The goal is to generate a node plug-in API in the near future, whether 
that is before 2.44 is release or not is still up in the air.  My gut 
feeling is it will be before 2.44, but may need revision in the future.  
I would prefer to get it right the first time so please respond tho this 
email if you have input.  I do plan on following Peter's recommendation 
for a plug-in api for the nodes for the most part, any deviations I make 
will be noted on the wiki.

I created a new directory in the source under the /blender/source 
directory called nodes.  In this directory is /node and it has the 
following structure:

.:
total 32
drwxr-sr-x  3 bob bob 4096 2007-03-20 23:11 .
drwsrwsr-x 69 bob bob 4096 2007-03-20 23:11 ..
-rw-rw-rw-  1 bob bob 6503 2007-03-20 00:50 CMP_node.h
drwxrwxrwx  4 bob bob 4096 2007-03-03 14:25 intern
-rw-rw-rw-  1 bob bob 5936 2007-03-20 00:22 node.h
-rw-rw-rw-  1 bob bob 3899 2007-03-20 00:50 SHD_node.h

./intern:
total 120
drwxrwxrwx 4 bob bob  4096 2007-03-03 14:25 .
drwxr-sr-x 3 bob bob  4096 2007-03-20 23:11 ..
drwxrwxrwx 2 bob bob  4096 2007-03-18 11:54 CMP_nodes
-rw-rw-rw- 1 bob bob 19721 2007-03-20 01:13 CMP_util.c
-rw-rw-rw- 1 bob bob  6514 2007-03-20 01:13 CMP_util.h
-rw-rw-rw- 1 bob bob 61236 2007-03-20 01:01 node.c
drwxrwxrwx 2 bob bob  4096 2007-03-18 19:51 SHD_nodes
-rw-rw-rw- 1 bob bob  5147 2007-03-20 00:57 SHD_util.c
-rw-rw-rw- 1 bob bob  3779 2007-03-20 00:23 SHD_util.h

./intern/CMP_nodes:
total 324
drwxrwxrwx 2 bob bob  4096 2007-03-18 11:54 .
drwxrwxrwx 4 bob bob  4096 2007-03-03 14:25 ..
-rw-rw-rw- 1 bob bob  4225 2007-03-20 00:47 CMP_alphaOver.c
-rw-rw-rw- 1 bob bob 16548 2007-03-20 01:13 CMP_blur.c
-rw-rw-rw- 1 bob bob  7406 2007-03-20 00:47 CMP_channelMatte.c
-rw-rw-rw- 1 bob bob  6588 2007-03-20 00:47 CMP_chromaMatte.c
-rw-rw-rw- 1 bob bob  4552 2007-03-20 00:47 CMP_colorSpill.c
-rw-rw-rw- 1 bob bob  3416 2007-03-20 00:47 CMP_composite.c
-rw-rw-rw- 1 bob bob  6339 2007-03-20 00:47 CMP_curves.c
-rw-rw-rw- 1 bob bob 29056 2007-03-20 00:47 CMP_defocus.c
-rw-rw-rw- 1 bob bob  8225 2007-03-20 00:47 CMP_diffMatte.c
-rw-rw-rw- 1 bob bob  4450 2007-03-20 00:47 CMP_dilate.c
-rw-rw-rw- 1 bob bob  4926 2007-03-20 00:47 CMP_displace.c
-rw-rw-rw- 1 bob bob  7967 2007-03-20 00:47 CMP_filter.c
-rw-rw-rw- 1 bob bob  3389 2007-03-20 00:47 CMP_flip.c
-rw-rw-rw- 1 bob bob  4238 2007-03-20 00:47 CMP_hueSatVal.c
-rw-rw-rw- 1 bob bob  3108 2007-03-20 00:47 CMP_idMask.c
-rw-rw-rw- 1 bob bob 21635 2007-03-20 00:47 CMP_image.c
-rw-rw-rw- 1 bob bob  4050 2007-03-20 00:47 CMP_lummaMatte.c
-rw-rw-rw- 1 bob bob  4638 2007-03-20 00:47 CMP_mapUV.c
-rw-rw-rw- 1 bob bob  4057 2007-03-20 00:47 CMP_mapValue.c
-rw-rw-rw- 1 bob bob  4258 2007-03-20 00:47 CMP_math.c
-rw-rw-rw- 1 bob bob  3103 2007-03-20 00:47 CMP_mixrgb.c
-rw-rw-rw- 1 bob bob  2934 2007-03-20 00:47 CMP_normal.c
-rw-rw-rw- 1 bob bob  5222 2007-03-20 00:47 CMP_outputFile.c
-rw-rw-rw- 1 bob bob  1825 2007-03-20 00:47 CMP_rgb.c
-rw-rw-rw- 1 bob bob  4557 2007-03-20 00:47 CMP_rotate.c
-rw-rw-rw- 1 bob bob  4477 2007-03-20 00:47 CMP_scale.c
-rw-rw-rw- 1 bob bob  5917 2007-03-20 00:47 CMP_sepcombHSVA.c
-rw-rw-rw- 1 bob bob  5206 2007-03-20 00:47 CMP_sepcombRGBA.c
-rw-rw-rw- 1 bob bob  6021 2007-03-20 00:47 CMP_sepcombYCCA.c
-rw-rw-rw- 1 bob bob  5843 2007-03-20 00:47 CMP_sepcombYUVA.c
-rw-rw-rw- 1 bob bob  2915 2007-03-20 00:47 CMP_setalpha.c
-rw-rw-rw- 1 bob bob  4954 2007-03-20 00:47 CMP_splitViewer.c
-rw-rw-rw- 1 bob bob  4028 2007-03-20 00:47 CMP_texture.c
-rw-rw-rw- 1 bob bob  2303 2007-03-20 00:47 CMP_translate.c
-rw-rw-rw- 1 bob bob  4289 2007-03-20 00:47 CMP_valToRgb.c
-rw-rw-rw- 1 bob bob  1835 2007-03-20 00:47 CMP_value.c
-rw-rw-rw- 1 bob bob  4194 2007-03-20 00:47 CMP_vecBlur.c
-rw-rw-rw- 1 bob bob  3857 2007-03-20 00:47 CMP_viewer.c
-rw-rw-rw- 1 bob bob  4593 2007-03-20 00:47 CMP_zcombine.c

./intern/SHD_nodes:
total 92
drwxrwxrwx 2 bob bob 4096 2007-03-18 19:51 .
drwxrwxrwx 4 bob bob 4096 2007-03-03 14:25 ..
-rw-rw-rw- 1 bob bob 2297 2007-03-20 00:48 SHD_camera.c
-rw-rw-rw- 1 bob bob 3192 2007-03-20 00:48 SHD_curves.c
-rw-rw-rw- 1 bob bob 4740 2007-03-20 00:48 SHD_geom.c
-rw-rw-rw- 1 bob bob 5821 2007-03-20 00:48 SHD_mapping.c
-rw-rw-rw- 1 bob bob 9089 2007-03-20 00:48 SHD_material.c
-rw-rw-rw- 1 bob bob 5522 2007-03-20 00:48 SHD_math.c
-rw-rw-rw- 1 bob bob 2418 2007-03-20 00:48 SHD_mixRgb.c
-rw-rw-rw- 1 bob bob 2350 2007-03-20 00:48 SHD_normal.c
-rw-rw-rw- 1 bob bob 2363 2007-03-20 00:48 SHD_output.c
-rw-rw-rw- 1 bob bob 1810 2007-03-20 00:48 SHD_rgb.c
-rw-rw-rw- 1 bob bob 2334 2007-03-20 00:48 SHD_squeeze.c
-rw-rw-rw- 1 bob bob 3880 2007-03-20 00:48 SHD_texture.c
-rw-rw-rw- 1 bob bob 3211 2007-03-20 01:11 SHD_valToRgb.c
-rw-rw-rw- 1 bob bob 1836 2007-03-20 00:48 SHD_value.c
-rw-rw-rw- 1 bob bob 4247 2007-03-20 00:48 SHD_vectMath.c


The point of all this is to move the rendering and initialization code 
the the individual node files so that they can be moved to shared 
libraries and loaded dynamically.  This will involve new functions to 
change the add node menu's (still to be done).  I will be moving some 
code back to blenkernel (mostly node.h and node.c).  Please let me know 
what your opinion is on this.   It currently runs fine in this state in 
case anybody is wondering.   Since I started working on this, I haven't 
been updating CVS (and have conflicts now). It'll take me a few hours, 
but patches are available on request.

cheers,

Bob