Commit: 420ea4423e213cff26139fc7f4672f012ac5bf06
Author: Martin Felke
Date: Thu Dec 22 00:31:42 2016 +0100
Branches: fracture_modifier
https://developer.blender.org/rB420ea4423e213cff26139fc7f4672f012ac5bf06
particle system: allow changing vgroups over time, suppress emission on empty
assigned density vgroups
===================================================================
M source/blender/blenkernel/BKE_particle.h
M source/blender/blenkernel/intern/particle_distribute.c
M source/blender/blenkernel/intern/particle_system.c
===================================================================
diff --git a/source/blender/blenkernel/BKE_particle.h
b/source/blender/blenkernel/BKE_particle.h
index b3e3968..700bafc 100644
--- a/source/blender/blenkernel/BKE_particle.h
+++ b/source/blender/blenkernel/BKE_particle.h
@@ -423,7 +423,7 @@ void psys_particle_on_dm(struct DerivedMesh *dm_final, int
from, int index, int
float orco[3], float ornor[3]);
/* particle_system.c */
-void distribute_particles(struct ParticleSimulationData *sim, int from);
+int distribute_particles(struct ParticleSimulationData *sim, int from);
void initialize_particle(struct ParticleSimulationData *sim, struct
ParticleData *pa);
void psys_calc_dmcache(struct Object *ob, struct DerivedMesh *dm_final, struct
DerivedMesh *dm_deformed, struct ParticleSystem *psys);
int psys_particle_dm_face_lookup(struct DerivedMesh *dm_final, struct
DerivedMesh *dm_deformed, int findex, const float fw[4], struct LinkNode
**poly_nodes);
diff --git a/source/blender/blenkernel/intern/particle_distribute.c
b/source/blender/blenkernel/intern/particle_distribute.c
index 44cf5b1..3bcac8c 100644
--- a/source/blender/blenkernel/intern/particle_distribute.c
+++ b/source/blender/blenkernel/intern/particle_distribute.c
@@ -1163,7 +1163,7 @@ static void psys_task_init_distribute(ParticleTask *task,
ParticleSimulationData
task->rng = BLI_rng_new(seed);
}
-static void distribute_particles_on_dm(ParticleSimulationData *sim, int from)
+static int distribute_particles_on_dm(ParticleSimulationData *sim, int from)
{
TaskScheduler *task_scheduler;
TaskPool *task_pool;
@@ -1174,7 +1174,7 @@ static void
distribute_particles_on_dm(ParticleSimulationData *sim, int from)
/* create a task pool for distribution tasks */
if (!psys_thread_context_init_distribute(&ctx, sim, from))
- return;
+ return 0;
task_scheduler = BLI_task_scheduler_get();
task_pool = BLI_task_pool_create(task_scheduler, &ctx);
@@ -1202,6 +1202,8 @@ static void
distribute_particles_on_dm(ParticleSimulationData *sim, int from)
psys_tasks_free(tasks, numtasks);
psys_thread_context_free(&ctx);
+
+ return 1;
}
/* ready for future use, to emit particles without geometry */
@@ -1212,14 +1214,15 @@ static void
distribute_particles_on_shape(ParticleSimulationData *sim, int UNUSE
fprintf(stderr,"Shape emission not yet possible!\n");
}
-void distribute_particles(ParticleSimulationData *sim, int from)
+int distribute_particles(ParticleSimulationData *sim, int from)
{
PARTICLE_PSMD;
int distr_error=0;
+ int ret = 0;
if (psmd) {
if (psmd->dm_final)
- distribute_particles_on_dm(sim, from);
+ ret = distribute_particles_on_dm(sim, from);
else
distr_error=1;
}
@@ -1231,6 +1234,8 @@ void distribute_particles(ParticleSimulationData *sim,
int from)
fprintf(stderr,"Particle distribution error!\n");
}
+
+ return ret;
}
/* ======== Simplify ======== */
diff --git a/source/blender/blenkernel/intern/particle_system.c
b/source/blender/blenkernel/intern/particle_system.c
index efaf1f9..6bc99a0 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -3859,7 +3859,9 @@ static int emit_particles(ParticleSimulationData *sim,
PTCacheID *pid, float UNU
if (totpart != oldtotpart)
realloc_particles(sim, totpart);
- return totpart - oldtotpart;
+ //always allow redistribution of particles !
+ //return totpart - oldtotpart;
+ return 1;
}
/* Calculates the next state for all particles of the system
@@ -3876,7 +3878,7 @@ static void system_step(ParticleSimulationData *sim,
float cfra, const bool use_
PTCacheID ptcacheid, *pid = NULL;
PARTICLE_P;
float disp, cache_cfra = cfra; /*, *vg_vel= 0, *vg_tan= 0, *vg_rot= 0,
*vg_size= 0; */
- int startframe = 0, endframe = 100, oldtotpart = 0;
+ int startframe = 0, endframe = 100, oldtotpart = 0, emitcount = 0;
/* cache shouldn't be used for hair or "continue physics" */
if (part->type != PART_HAIR) {
@@ -3903,11 +3905,21 @@ static void system_step(ParticleSimulationData *sim,
float cfra, const bool use_
/* 1. emit particles and redo particles if needed */
oldtotpart = psys->totpart;
- if (emit_particles(sim, pid, cfra) || psys->recalc & PSYS_RECALC_RESET)
{
- distribute_particles(sim, part->from);
- initialize_all_particles(sim);
- /* reset only just created particles (on startframe all
particles are recreated) */
- reset_all_particles(sim, 0.0, cfra, oldtotpart);
+ emitcount = emit_particles(sim, pid, cfra);
+ if (emitcount || psys->recalc & PSYS_RECALC_RESET) {
+ if (distribute_particles(sim, part->from)) {
+ initialize_all_particles(sim);
+ /* reset only just created particles (on startframe all
particles are recreated) */
+ reset_all_particles(sim, 0.0, cfra, oldtotpart);
+ }
+ else {
+ //throw away...
+ int i;
+ for (i = 0; i < sim->psys->totpart; i++)
+ {
+ sim->psys->particles[i].flag |= PARS_UNEXIST;
+ }
+ }
free_unexisting_particles(sim);
if (psys->fluid_springs) {
@@ -3920,7 +3932,9 @@ static void system_step(ParticleSimulationData *sim,
float cfra, const bool use_
/* flag for possible explode modifiers after this system */
sim->psmd->flag |= eParticleSystemFlag_Pars;
- BKE_ptcache_id_clear(pid, PTCACHE_CLEAR_AFTER, cfra);
+ if (psys->recalc & PSYS_RECALC_RESET) {
+ BKE_ptcache_id_clear(pid, PTCACHE_CLEAR_AFTER, cfra);
+ }
}
/* 2. try to read from the cache */
@@ -4265,8 +4279,18 @@ void particle_system_update(Scene *scene, Object *ob,
ParticleSystem *psys, cons
if (emit_particles(&sim, NULL, cfra) ||
(psys->recalc & PSYS_RECALC_RESET)) {
free_keyed_keys(psys);
- distribute_particles(&sim,
part->from);
- initialize_all_particles(&sim);
+ if (distribute_particles(&sim,
part->from)) {
+
initialize_all_particles(&sim);
+ }
+ else {
+ //throw away...
+ int i;
+ for (i = 0; i <
sim.psys->totpart; i++)
+ {
+
sim.psys->particles[i].flag |= PARS_UNEXIST;
+ }
+ }
+
free_unexisting = true;
/* flag for possible explode
modifiers after this system */
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