The revised patch from Leon for new particle effects.

New is that objects can have a force field, and Meshes can even deflect
(collide) particles. This is in a new sub-menu in Object buttons F7

The full instructions where on the web, Leon mailed it me and I will put
it in CMS tomorrow. For those who like to play with it now, here are demo
files:

http://download.blender.org/demo/test/

Quite some changes where in the integration though... so previous created
particle deflectors will not work. Changes to mention now are:
- gravity is renamed to 'force field'
- force field and deflector options are in Object now, not in Mesh
- the options also have its own struct, doesnt add to Object by default
- force fields are possible for all object types, but only work on center.
  So empty objects are typical for it.

Work to do:
- add draw method in 3d win to denote forcefield objects
- check on the UI (panel with different size?)
- add 'recalc' button in deflector panel

2 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 11c65f783bc..0723b8175fc 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -2204,7 +2204,7 @@ static void direct_link_object(FileData *fd, Object *ob)
 		paf= paf->next;
 	}
 
-	link_list(fd, &ob->network);
+	ob->pd= newdataadr(fd, ob->pd);
 
 	link_list(fd, &ob->prop);
 	prop= ob->prop.first;
diff --git a/source/blender/blenloader/intern/writefile.c b/source/blender/blenloader/intern/writefile.c
index 5b49f952140..32249c1c46b 100644
--- a/source/blender/blenloader/intern/writefile.c
+++ b/source/blender/blenloader/intern/writefile.c
@@ -649,6 +649,8 @@ static void write_objects(WriteData *wd, ListBase *idbase)
 			write_constraints(wd, &ob->constraints);
 			write_constraint_channels(wd, &ob->constraintChannels);
 			write_nlastrips(wd, &ob->nlastrips);
+			
+			writestruct(wd, DATA, "PartDeflect", 1, ob->pd);
 		}
 		ob= ob->id.next;
 	}