diff options
Diffstat (limited to 'source/blender/blenkernel/intern/particle_distribute.c')
| -rw-r--r-- | source/blender/blenkernel/intern/particle_distribute.c | 71 |
1 files changed, 51 insertions, 20 deletions
diff --git a/source/blender/blenkernel/intern/particle_distribute.c b/source/blender/blenkernel/intern/particle_distribute.c index 44cf5b119c1..9a7980827ad 100644 --- a/source/blender/blenkernel/intern/particle_distribute.c +++ b/source/blender/blenkernel/intern/particle_distribute.c @@ -39,6 +39,7 @@ #include "BLI_jitter.h" #include "BLI_kdtree.h" #include "BLI_math.h" +#include "BLI_math_geom.h" #include "BLI_rand.h" #include "BLI_sort.h" #include "BLI_task.h" @@ -213,14 +214,22 @@ static void distribute_grid(DerivedMesh *dm, ParticleSystem *psys) copy_v3_v3(co2, co1); co2[a] += delta[a] + 0.001f*d; co1[a] -= 0.001f*d; - + + struct IsectRayPrecalc isect_precalc; + float ray_direction[3]; + sub_v3_v3v3(ray_direction, co2, co1); + isect_ray_tri_watertight_v3_precalc(&isect_precalc, ray_direction); + /* lets intersect the faces */ for (i=0; i<totface; i++,mface++) { copy_v3_v3(v1, mvert[mface->v1].co); copy_v3_v3(v2, mvert[mface->v2].co); copy_v3_v3(v3, mvert[mface->v3].co); - bool intersects_tri = isect_axial_line_segment_tri_v3(a, co1, co2, v2, v3, v1, &lambda); + bool intersects_tri = isect_ray_tri_watertight_v3(co1, + &isect_precalc, + v1, v2, v3, + &lambda, NULL); if (intersects_tri) { if (from==PART_FROM_FACE) (pa+(int)(lambda*size[a])*a0mul)->flag &= ~PARS_UNEXIST; @@ -231,7 +240,10 @@ static void distribute_grid(DerivedMesh *dm, ParticleSystem *psys) if (mface->v4 && (!intersects_tri || from==PART_FROM_VOLUME)) { copy_v3_v3(v4, mvert[mface->v4].co); - if (isect_axial_line_segment_tri_v3(a, co1, co2, v4, v1, v3, &lambda)) { + if (isect_ray_tri_watertight_v3(co1, + &isect_precalc, + v1, v3, v4, + &lambda, NULL)) { if (from==PART_FROM_FACE) (pa+(int)(lambda*size[a])*a0mul)->flag &= ~PARS_UNEXIST; else @@ -427,12 +439,37 @@ static int distribute_binary_search(float *sum, int n, float value) static void distribute_from_verts_exec(ParticleTask *thread, ParticleData *pa, int p) { ParticleThreadContext *ctx= thread->ctx; - int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ + MFace *mface; + + mface = ctx->dm->getTessFaceDataArray(ctx->dm, CD_MFACE); + + int rng_skip_tot = PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */ /* TODO_PARTICLE - use original index */ - pa->num= ctx->index[p]; - pa->fuv[0] = 1.0f; - pa->fuv[1] = pa->fuv[2] = pa->fuv[3] = 0.0; + pa->num = ctx->index[p]; + + zero_v4(pa->fuv); + + if (pa->num != DMCACHE_NOTFOUND && pa->num < ctx->dm->getNumVerts(ctx->dm)) { + + /* This finds the first face to contain the emitting vertex, + * this is not ideal, but is mostly fine as UV seams generally + * map to equal-colored parts of a texture */ + for (int i = 0; i < ctx->dm->getNumTessFaces(ctx->dm); i++, mface++) { + if (ELEM(pa->num, mface->v1, mface->v2, mface->v3, mface->v4)) { + unsigned int *vert = &mface->v1; + + for (int j = 0; j < 4; j++, vert++) { + if (*vert == pa->num) { + pa->fuv[j] = 1.0f; + break; + } + } + + break; + } + } + } #if ONLY_WORKING_WITH_PA_VERTS if (ctx->tree) { @@ -873,10 +910,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti else dm= CDDM_from_mesh((Mesh*)ob->data); - /* BMESH ONLY, for verts we don't care about tessfaces */ - if (from != PART_FROM_VERT) { - DM_ensure_tessface(dm); - } + DM_ensure_tessface(dm); /* we need orco for consistent distributions */ if (!CustomData_has_layer(&dm->vertData, CD_ORCO)) @@ -1070,13 +1104,10 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti /* This is to address tricky issues with vertex-emitting when user tries (and expects) exact 1-1 vert/part * distribution (see T47983 and its two example files). It allows us to consider pos as * 'midpoint between v and v+1' (or 'p and p+1', depending whether we have more vertices than particles or not), - * and avoid stumbling over float imprecisions in element_sum. */ - if (from == PART_FROM_VERT) { - pos = (totpart < totmapped) ? 0.5 / (double)totmapped : step * 0.5; /* We choose the smaller step. */ - } - else { - pos = 0.0; - } + * and avoid stumbling over float imprecisions in element_sum. + * Note: moved face and volume distribution to this as well (instead of starting at zero), + * for the same reasons, see T52682. */ + pos = (totpart < totmapped) ? 0.5 / (double)totmapped : step * 0.5; /* We choose the smaller step. */ for (i = 0, p = 0; p < totpart; p++, pos += step) { for ( ; (i < totmapped - 1) && (pos > (double)element_sum[i]); i++); @@ -1092,7 +1123,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti /* For hair, sort by origindex (allows optimization's in rendering), */ /* however with virtual parents the children need to be in random order. */ - if (part->type == PART_HAIR && !(part->childtype==PART_CHILD_FACES && part->parents!=0.0f)) { + if (part->type == PART_HAIR && !(part->childtype==PART_CHILD_FACES && part->parents != 0.0f)) { int *orig_index = NULL; if (from == PART_FROM_VERT) { @@ -1115,7 +1146,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti if (jitlevel == 0) { jitlevel= totpart/totelem; - if (part->flag & PART_EDISTR) jitlevel*= 2; /* looks better in general, not very scietific */ + if (part->flag & PART_EDISTR) jitlevel*= 2; /* looks better in general, not very scientific */ if (jitlevel<3) jitlevel= 3; } |