New things for particle effectors:

- For newtonian particles a "self effect" button in particle extras makes the particles be effected by themselves if a particle effector is defined for this system, currently this is a brute force method so things start getting slow with more than ~100 particles, but this will hopefully change in the future.
- Two new effector types: charge and a Lennard-Jones potential based force (inter-molecular forces for example).
   -Charge is similar to spherical field except it changes behavior (attract/repulse) based on the effected particles charge field (negative/positive) like real particles with a charge.
   -The Lennard-Jones field is a very short range force with a behavior determined by the sizes of the effector and effected particle. At a distance smaller than the combined sizes the field is very repulsive and after that distance it's attractive. It tries to keep the particles at an equilibrium distance from each other. Particles need to be at a close proximity to each other to be effected by this field at all.
- Particle systems can now have two effector fields (two slots in the fields panel). This allows to create particles which for example have both a charge and a Lennard-Jones potential.

1 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_ipo_types.h b/source/blender/makesdna/DNA_ipo_types.h
index 03ffef3cd55..1e30f3f7640 100644
--- a/source/blender/makesdna/DNA_ipo_types.h
+++ b/source/blender/makesdna/DNA_ipo_types.h
@@ -354,8 +354,8 @@ typedef short IPO_Channel;
 
 /* ******************** */
 /* particle ipos */
-#define PART_TOTIPO		22
-#define PART_TOTNAM		22
+#define PART_TOTIPO		25
+#define PART_TOTNAM		25
 
 #define PART_EMIT_FREQ	1
 #define PART_EMIT_LIFE	2
@@ -385,6 +385,10 @@ typedef short IPO_Channel;
 #define PART_PD_FFALL	21
 #define PART_PD_FMAXD	22
 
+#define PART_PD2_FSTR	23
+#define PART_PD2_FFALL	24
+#define PART_PD2_FMAXD	25
+
 
 /* these are IpoCurve specific */
 /* **************** IPO ********************* */