diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-06-12 15:20:46 +0300 |
---|---|---|
committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-06-12 15:30:50 +0300 |
commit | c2abb6d3fc0238cc1a8526d9fc3f6b603ee51f3a (patch) | |
tree | 52cd0fbd316e698ef7438bf0113076565ec2d9cc /source | |
parent | 49b39ea851be0ca82da675dea5971185e297df47 (diff) |
Particles: Use local RNG
Currently only obvious cases, but is already a progress.
Diffstat (limited to 'source')
-rw-r--r-- | source/blender/blenkernel/intern/particle_distribute.c | 25 | ||||
-rw-r--r-- | source/blender/blenkernel/intern/particle_system.c | 1 |
2 files changed, 15 insertions, 11 deletions
diff --git a/source/blender/blenkernel/intern/particle_distribute.c b/source/blender/blenkernel/intern/particle_distribute.c index 846afd48064..6c23036256b 100644 --- a/source/blender/blenkernel/intern/particle_distribute.c +++ b/source/blender/blenkernel/intern/particle_distribute.c @@ -85,6 +85,7 @@ static void distribute_simple_children(Scene *scene, Object *ob, Mesh *final_mes int i, p; int child_nbr= psys_get_child_number(scene, psys, use_render_params); int totpart= psys_get_tot_child(scene, psys, use_render_params); + RNG *rng = BLI_rng_new_srandom(31415926 + psys->seed + psys->child_seed); alloc_child_particles(psys, totpart); @@ -96,9 +97,9 @@ static void distribute_simple_children(Scene *scene, Object *ob, Mesh *final_mes /* create even spherical distribution inside unit sphere */ while (length>=1.0f) { - cpa->fuv[0]=2.0f*BLI_frand()-1.0f; - cpa->fuv[1]=2.0f*BLI_frand()-1.0f; - cpa->fuv[2]=2.0f*BLI_frand()-1.0f; + cpa->fuv[0]=2.0f*BLI_rng_get_float(rng)-1.0f; + cpa->fuv[1]=2.0f*BLI_rng_get_float(rng)-1.0f; + cpa->fuv[2]=2.0f*BLI_rng_get_float(rng)-1.0f; length=len_v3(cpa->fuv); } @@ -107,6 +108,8 @@ static void distribute_simple_children(Scene *scene, Object *ob, Mesh *final_mes } /* dmcache must be updated for parent particles if children from faces is used */ psys_calc_dmcache(ob, final_mesh, deform_mesh, psys); + + BLI_rng_free(rng); } static void distribute_grid(Mesh *mesh, ParticleSystem *psys) { @@ -818,6 +821,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti int jitlevel= 1, distr; float *element_weight=NULL,*jitter_offset=NULL, *vweight=NULL; float cur, maxweight=0.0, tweight, totweight, inv_totweight, co[3], nor[3], orco[3]; + RNG *rng = NULL; if (ELEM(NULL, ob, psys, psys->part)) return 0; @@ -846,7 +850,6 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti if (from == PART_FROM_CHILD) { /* Simple children */ if (part->childtype != PART_CHILD_FACES) { - BLI_srandom(31415926 + psys->seed + psys->child_seed); distribute_simple_children(scene, ob, final_mesh, sim->psmd->mesh_original, psys, use_render_params); return 0; } @@ -854,8 +857,6 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti else { /* Grid distribution */ if (part->distr==PART_DISTR_GRID && from != PART_FROM_VERT) { - BLI_srandom(31415926 + psys->seed); - if (psys->part->use_modifier_stack) { mesh = final_mesh; } @@ -882,8 +883,8 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti /* Create trees and original coordinates if needed */ if (from == PART_FROM_CHILD) { - distr=PART_DISTR_RAND; - BLI_srandom(31415926 + psys->seed + psys->child_seed); + distr = PART_DISTR_RAND; + rng = BLI_rng_new_srandom(31415926 + psys->seed + psys->child_seed); mesh= final_mesh; /* BMESH ONLY */ @@ -906,7 +907,8 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti } else { distr = part->distr; - BLI_srandom(31415926 + psys->seed); + + rng = BLI_rng_new_srandom(31415926 + psys->seed); if (psys->part->use_modifier_stack) mesh = final_mesh; @@ -958,6 +960,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti if (mesh != final_mesh) BKE_id_free(NULL, mesh); BLI_kdtree_free(tree); + BLI_rng_free(rng); return 0; } @@ -1098,7 +1101,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti for (p = 0; p < totpart; p++) { /* In theory element_sum[totmapped - 1] should be 1.0, * but due to float errors this is not necessarily always true, so scale pos accordingly. */ - const float pos = BLI_frand() * element_sum[totmapped - 1]; + const float pos = BLI_rng_get_float(rng) * element_sum[totmapped - 1]; const int eidx = distribute_binary_search(element_sum, totmapped, pos); particle_element[p] = element_map[eidx]; BLI_assert(pos <= element_sum[eidx]); @@ -1191,6 +1194,8 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti alloc_child_particles(psys, totpart); } + BLI_rng_free(rng); + return 1; } diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c index 8d6991ff9f4..514f4408568 100644 --- a/source/blender/blenkernel/intern/particle_system.c +++ b/source/blender/blenkernel/intern/particle_system.c @@ -3529,7 +3529,6 @@ static void dynamics_step(ParticleSimulationData *sim, float cfra) return; } - BLI_srandom(31415926 + (int)cfra + psys->seed); /* for now do both, boids us 'rng' */ rng = BLI_rng_new_srandom(31415926 + (int)cfra + psys->seed); |