Unified effector functionality for particles, cloth and softbody

* Unified scene wide gravity (currently in scene buttons) 
  instead of each simulation having it's own gravity.
* Weight parameters for all effectors and an effector group 
  setting.
* Every effector can use noise.
* Most effectors have "shapes" point, plane, surface, every point.
	- "Point" is most like the old effectors and uses the 
	  effector location as the effector point.
	- "Plane" uses the closest point on effectors local xy-plane 
	  as the effector point.
	- "Surface" uses the closest point on an effector object's 
	  surface as the effector point.
	- "Every Point" uses every point in a mesh effector object 
	  as an effector point.
	- The falloff is calculated from this point, so for example 
	  with "surface" shape and "use only negative z axis" it's 
	  possible to apply force only "inside" the effector object.
* Spherical effector is now renamed as "force" as it's no longer 
  just spherical.
* New effector parameter "flow", which makes the effector act as 
  surrounding air velocity, so the resulting force is 
  proportional to the velocity difference of the point and "air 
  velocity". For example a wind field with flow=1.0 results in 
  proper non-accelerating wind.
* New effector fields "turbulence", which creates nice random 
  flow paths, and "drag", which slows the points down.
* Much improved vortex field.
* Effectors can now effect particle rotation as well as location.
* Use full, or only positive/negative z-axis to apply force 
  (note. the z-axis is the surface normal in the case of 
  effector shape "surface")
* New "force field" submenu in add menu, which adds an empty 
  with the chosen effector (curve object for corve guides).
* Other dynamics should be quite easy to add to the effector 
  system too if wanted.
* "Unified" doesn't mean that force fields give the exact same results for 
  particles, softbody & cloth, since their final effect depends on many external 
  factors, like for example the surface area of the effected faces.

Code changes
* Subversion bump for correct handling of global gravity.
* Separate ui py file for common dynamics stuff.
* Particle settings updating is flushed with it's id through 
  DAG_id_flush_update(..).
  
Known issues
* Curve guides don't yet have all ui buttons in place, but they 
  should work none the less.
* Hair dynamics don't yet respect force fields.

Other changes
* Particle emission defaults now to frames 1-200 with life of 50 
  frames to fill the whole default timeline.
* Many particles drawing related crashes fixed.
* Sometimes particles didn't update on first frame properly.
* Hair with object/group visualization didn't work properly.
* Memory leaks with PointCacheID lists (Genscher, remember to 
  free pidlists after use :).

1 files changed, 14 insertions, 12 deletions

diff --git a/source/blender/makesdna/DNA_particle_types.h b/source/blender/makesdna/DNA_particle_types.h
index 089c1c76bcf..4c620ae527e 100644
--- a/source/blender/makesdna/DNA_particle_types.h
+++ b/source/blender/makesdna/DNA_particle_types.h
@@ -114,6 +114,8 @@ typedef struct ParticleSettings {
 
 	struct BoidSettings *boids;
 
+	struct EffectorWeights *effector_weights;
+
 	int flag;
 	short type, from, distr;
 	/* physics modes */
@@ -176,10 +178,8 @@ typedef struct ParticleSettings {
 	/* keyed particles */
 	int keyed_loops;
 
-	float effector_weight[10];
-
 	struct Group *dup_group;
-	struct Group *eff_group;
+	struct Group *eff_group;		// deprecated
 	struct Object *dup_ob;
 	struct Object *bb_ob;
 	struct Ipo *ipo;				// xxx depreceated... old animation system
@@ -209,8 +209,6 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 	struct Object *lattice;
 	struct Object *parent;					/* particles from global space -> parent space */
 
-	struct ListBase effectors, reactevents;	/* runtime */
-
 	struct ListBase targets;				/* used for keyed and boid physics */
 
 	char name[32];							/* particle system name */
@@ -233,6 +231,8 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 	struct PointCache *pointcache;
 	struct ListBase ptcaches;
 
+	struct ListBase *effectors;
+
 	struct KDTree *tree;					/* used for interactions with self and other systems */
 
 	struct ParticleDrawData *pdd;
@@ -270,7 +270,7 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 #define PART_ROT_DYN		(1<<14)	/* dynamic rotation */
 #define PART_SIZEMASS		(1<<16)
 
-//#define PART_KEYED_TIMING	(1<<15)
+//#define PART_HAIR_GRAVITY	(1<<15)
 
 //#define PART_ABS_TIME		(1<<17)
 //#define PART_GLOB_TIME		(1<<18)
@@ -407,11 +407,13 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 #define PART_CHILD_FACES		2
 
 /* psys->recalc */
-#define PSYS_RECALC_REDO	1	/* only do pathcache etc */
-#define PSYS_RECALC_RESET	2	/* reset everything including pointcache */
-#define PSYS_RECALC_TYPE	4	/* handle system type change */
-#define PSYS_RECALC_CHILD	16	/* only child settings changed */
-#define PSYS_RECALC_PHYS	32	/* physics type changed */
+/* starts from 8 so that the first bits can be ob->recalc */
+#define PSYS_RECALC_REDO	8	/* only do pathcache etc */
+#define PSYS_RECALC_RESET	16	/* reset everything including pointcache */
+#define PSYS_RECALC_TYPE	32	/* handle system type change */
+#define PSYS_RECALC_CHILD	64	/* only child settings changed */
+#define PSYS_RECALC_PHYS	128	/* physics type changed */
+#define PSYS_RECALC			248
 
 /* psys->flag */
 #define PSYS_CURRENT		1
@@ -436,7 +438,7 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 #define PARS_REKEY			8
 
 /* pars->alive */
-#define PARS_KILLED			0
+//#define PARS_KILLED			0 /* deprecated */
 #define PARS_DEAD			1
 #define PARS_UNBORN			2
 #define PARS_ALIVE			3