diff options
Diffstat (limited to 'source/blender/editors/curves/intern/curves_ops.cc')
| -rw-r--r-- | source/blender/editors/curves/intern/curves_ops.cc | 140 |
1 files changed, 139 insertions, 1 deletions
diff --git a/source/blender/editors/curves/intern/curves_ops.cc b/source/blender/editors/curves/intern/curves_ops.cc index 7d07c211542..5588f7440a8 100644 --- a/source/blender/editors/curves/intern/curves_ops.cc +++ b/source/blender/editors/curves/intern/curves_ops.cc @@ -20,6 +20,7 @@ #include "BKE_layer.h" #include "BKE_mesh.h" #include "BKE_mesh_runtime.h" +#include "BKE_object.h" #include "BKE_paint.h" #include "BKE_particle.h" #include "BKE_report.h" @@ -32,9 +33,11 @@ #include "DNA_scene_types.h" #include "DEG_depsgraph.h" +#include "DEG_depsgraph_query.h" #include "RNA_access.h" #include "RNA_define.h" +#include "RNA_prototypes.h" /** * The code below uses a suffix naming convention to indicate the coordinate space: @@ -192,7 +195,7 @@ static void try_convert_single_object(Object &curves_ob, /* Prepare utility data structure to map hair roots to mfaces. */ const Span<int> mface_to_poly_map{ - static_cast<int *>(CustomData_get_layer(&surface_me.fdata, CD_ORIGINDEX)), + static_cast<const int *>(CustomData_get_layer(&surface_me.fdata, CD_ORIGINDEX)), surface_me.totface}; Array<Vector<int>> poly_to_mface_map(surface_me.totpoly); for (const int mface_i : mface_to_poly_map.index_range()) { @@ -315,6 +318,140 @@ static void CURVES_OT_convert_to_particle_system(wmOperatorType *ot) ot->flag = OPTYPE_UNDO | OPTYPE_REGISTER; } +namespace convert_from_particle_system { + +static bke::CurvesGeometry particles_to_curves(Object &object, ParticleSystem &psys) +{ + ParticleSettings &settings = *psys.part; + if (psys.part->type != PART_HAIR) { + return {}; + } + + const bool transfer_parents = (settings.draw & PART_DRAW_PARENT) || settings.childtype == 0; + + const Span<ParticleCacheKey *> parents_cache{psys.pathcache, psys.totcached}; + const Span<ParticleCacheKey *> children_cache{psys.childcache, psys.totchildcache}; + + int points_num = 0; + Vector<int> curve_offsets; + Vector<int> parents_to_transfer; + Vector<int> children_to_transfer; + if (transfer_parents) { + for (const int parent_i : parents_cache.index_range()) { + const int segments = parents_cache[parent_i]->segments; + if (segments <= 0) { + continue; + } + parents_to_transfer.append(parent_i); + curve_offsets.append(points_num); + points_num += segments + 1; + } + } + for (const int child_i : children_cache.index_range()) { + const int segments = children_cache[child_i]->segments; + if (segments <= 0) { + continue; + } + children_to_transfer.append(child_i); + curve_offsets.append(points_num); + points_num += segments + 1; + } + const int curves_num = parents_to_transfer.size() + children_to_transfer.size(); + curve_offsets.append(points_num); + BLI_assert(curve_offsets.size() == curves_num + 1); + bke::CurvesGeometry curves(points_num, curves_num); + curves.offsets_for_write().copy_from(curve_offsets); + + const float4x4 object_to_world_mat = object.obmat; + const float4x4 world_to_object_mat = object_to_world_mat.inverted(); + + MutableSpan<float3> positions = curves.positions_for_write(); + + const auto copy_hair_to_curves = [&](const Span<ParticleCacheKey *> hair_cache, + const Span<int> indices_to_transfer, + const int curve_index_offset) { + threading::parallel_for(indices_to_transfer.index_range(), 256, [&](const IndexRange range) { + for (const int i : range) { + const int hair_i = indices_to_transfer[i]; + const int curve_i = i + curve_index_offset; + const IndexRange points = curves.points_for_curve(curve_i); + const Span<ParticleCacheKey> keys{hair_cache[hair_i], points.size()}; + for (const int key_i : keys.index_range()) { + const float3 key_pos_wo = keys[key_i].co; + positions[points[key_i]] = world_to_object_mat * key_pos_wo; + } + } + }); + }; + + if (transfer_parents) { + copy_hair_to_curves(parents_cache, parents_to_transfer, 0); + } + copy_hair_to_curves(children_cache, children_to_transfer, parents_to_transfer.size()); + + curves.update_curve_types(); + curves.tag_topology_changed(); + return curves; +} + +static int curves_convert_from_particle_system_exec(bContext *C, wmOperator *UNUSED(op)) +{ + Main &bmain = *CTX_data_main(C); + ViewLayer &view_layer = *CTX_data_view_layer(C); + Depsgraph &depsgraph = *CTX_data_depsgraph_pointer(C); + Object *ob_from_orig = ED_object_active_context(C); + ParticleSystem *psys_orig = static_cast<ParticleSystem *>( + CTX_data_pointer_get_type(C, "particle_system", &RNA_ParticleSystem).data); + if (psys_orig == nullptr) { + psys_orig = psys_get_current(ob_from_orig); + } + if (psys_orig == nullptr) { + return OPERATOR_CANCELLED; + } + Object *ob_from_eval = DEG_get_evaluated_object(&depsgraph, ob_from_orig); + ParticleSystem *psys_eval = nullptr; + LISTBASE_FOREACH (ModifierData *, md, &ob_from_eval->modifiers) { + if (md->type != eModifierType_ParticleSystem) { + continue; + } + ParticleSystemModifierData *psmd = reinterpret_cast<ParticleSystemModifierData *>(md); + if (!STREQ(psmd->psys->name, psys_orig->name)) { + continue; + } + psys_eval = psmd->psys; + } + + Object *ob_new = BKE_object_add(&bmain, &view_layer, OB_CURVES, psys_eval->name); + ob_new->dtx |= OB_DRAWBOUNDOX; /* TODO: Remove once there is actual drawing. */ + Curves *curves_id = static_cast<Curves *>(ob_new->data); + BKE_object_apply_mat4(ob_new, ob_from_orig->obmat, true, false); + bke::CurvesGeometry::wrap(curves_id->geometry) = particles_to_curves(*ob_from_eval, *psys_eval); + + DEG_relations_tag_update(&bmain); + WM_main_add_notifier(NC_OBJECT | ND_DRAW, nullptr); + + return OPERATOR_FINISHED; +} + +static bool curves_convert_from_particle_system_poll(bContext *C) +{ + return ED_object_active_context(C) != nullptr; +} + +} // namespace convert_from_particle_system + +static void CURVES_OT_convert_from_particle_system(wmOperatorType *ot) +{ + ot->name = "Convert Particle System to Curves"; + ot->idname = "CURVES_OT_convert_from_particle_system"; + ot->description = "Add a new curves object based on the current state of the particle system"; + + ot->poll = convert_from_particle_system::curves_convert_from_particle_system_poll; + ot->exec = convert_from_particle_system::curves_convert_from_particle_system_exec; + + ot->flag = OPTYPE_UNDO | OPTYPE_REGISTER; +} + namespace snap_curves_to_surface { enum class AttachMode { @@ -514,5 +651,6 @@ void ED_operatortypes_curves() { using namespace blender::ed::curves; WM_operatortype_append(CURVES_OT_convert_to_particle_system); + WM_operatortype_append(CURVES_OT_convert_from_particle_system); WM_operatortype_append(CURVES_OT_snap_curves_to_surface); } |