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, 3 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_particle_types.h b/source/blender/makesdna/DNA_particle_types.h
index 4f62cd084cc..363f0075e23 100644
--- a/source/blender/makesdna/DNA_particle_types.h
+++ b/source/blender/makesdna/DNA_particle_types.h
@@ -166,6 +166,7 @@ typedef struct ParticleSettings {
 	struct Object *bb_ob;
 	struct Ipo *ipo;
 	struct PartDeflect *pd;
+	struct PartDeflect *pd2;
 } ParticleSettings;
 
 typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in copy_particlesystem */
@@ -264,6 +265,8 @@ typedef struct ParticleSystem{				/* note, make sure all (runtime) are NULL's in
 #define PART_CHILD_RENDER	(1<<29)
 #define PART_CHILD_GUIDE	(1<<30)
 
+#define PART_SELF_EFFECT	(1<<22)
+
 /* part->rotfrom */
 #define PART_ROT_KEYS		0	/* interpolate directly from keys */
 #define PART_ROT_ZINCR		1	/* same as zdir but done incrementally from previous position */