diff options
Diffstat (limited to 'source/blender/simulation/intern/simulation_collect_influences.cc')
| -rw-r--r-- | source/blender/simulation/intern/simulation_collect_influences.cc | 761 |
1 files changed, 530 insertions, 231 deletions
diff --git a/source/blender/simulation/intern/simulation_collect_influences.cc b/source/blender/simulation/intern/simulation_collect_influences.cc index 764e587d157..4d339f9e323 100644 --- a/source/blender/simulation/intern/simulation_collect_influences.cc +++ b/source/blender/simulation/intern/simulation_collect_influences.cc @@ -16,6 +16,7 @@ #include "simulation_collect_influences.hh" #include "particle_function.hh" +#include "particle_mesh_emitter.hh" #include "FN_attributes_ref.hh" #include "FN_multi_function_network_evaluation.hh" @@ -23,38 +24,125 @@ #include "NOD_node_tree_multi_function.hh" +#include "DEG_depsgraph_query.h" + +#include "BLI_hash.h" #include "BLI_rand.hh" +#include "BLI_set.hh" namespace blender::sim { +using fn::GVSpan; +using fn::MFContextBuilder; +using fn::MFDataType; +using fn::MFDummyNode; +using fn::MFFunctionNode; +using fn::MFInputSocket; +using fn::MFNetwork; +using fn::MFNetworkEvaluator; +using fn::MFNode; +using fn::MFOutputSocket; +using fn::MFParamsBuilder; +using fn::MFParamType; +using fn::MultiFunction; +using fn::VSpan; +using nodes::DerivedNodeTree; +using nodes::DInputSocket; +using nodes::DNode; +using nodes::DOutputSocket; +using nodes::DParentNode; +using nodes::MFNetworkTreeMap; +using nodes::NodeTreeRefMap; + struct DummyDataSources { - Map<const fn::MFOutputSocket *, std::string> particle_attributes; + Map<const MFOutputSocket *, std::string> particle_attributes; + Set<const MFOutputSocket *> simulation_time; + Set<const MFOutputSocket *> scene_time; }; extern "C" { void WM_clipboard_text_set(const char *buf, bool selection); } -static std::string dnode_to_path(const nodes::DNode &dnode) +static std::string dnode_to_path(const DNode &dnode) { std::string path; - for (const nodes::DParentNode *parent = dnode.parent(); parent; parent = parent->parent()) { + for (const DParentNode *parent = dnode.parent(); parent; parent = parent->parent()) { path = parent->node_ref().name() + "/" + path; } path = path + dnode.name(); return path; } -static Span<const nodes::DNode *> get_particle_simulation_nodes(const nodes::DerivedNodeTree &tree) +struct CollectContext : NonCopyable, NonMovable { + SimulationInfluences &influences; + RequiredStates &required_states; + ResourceCollector &resources; + MFNetworkTreeMap &network_map; + MFNetwork &network; + const DerivedNodeTree &tree; + + DummyDataSources data_sources; + Span<const DNode *> particle_simulation_nodes; + Map<const DNode *, std::string> node_paths; + + CollectContext(SimulationInfluences &influences, + RequiredStates &required_states, + ResourceCollector &resources, + MFNetworkTreeMap &network_map) + : influences(influences), + required_states(required_states), + resources(resources), + network_map(network_map), + network(network_map.network()), + tree(network_map.tree()) + { + particle_simulation_nodes = tree.nodes_by_type("SimulationNodeParticleSimulation"); + } +}; + +static const ParticleAction *create_particle_action(CollectContext &context, + const DOutputSocket &dsocket, + Span<StringRefNull> particle_names); + +static const ParticleAction *create_particle_action(CollectContext &context, + const DInputSocket &dsocket, + Span<StringRefNull> particle_names) +{ + BLI_assert(dsocket.bsocket()->type == SOCK_CONTROL_FLOW); + if (dsocket.linked_sockets().size() != 1) { + return nullptr; + } + return create_particle_action(context, *dsocket.linked_sockets()[0], particle_names); +} + +static StringRefNull get_identifier(CollectContext &context, const DNode &dnode) +{ + return context.node_paths.lookup_or_add_cb(&dnode, [&]() { return dnode_to_path(dnode); }); +} + +static Span<const DNode *> nodes_by_type(CollectContext &context, StringRefNull idname) +{ + return context.tree.nodes_by_type(idname); +} + +static Array<StringRefNull> find_linked_particle_simulations(CollectContext &context, + const DOutputSocket &output_socket) { - return tree.nodes_by_type("SimulationNodeParticleSimulation"); + VectorSet<StringRefNull> names; + for (const DInputSocket *target_socket : output_socket.linked_sockets()) { + if (target_socket->node().idname() == "SimulationNodeParticleSimulation") { + names.add(get_identifier(context, target_socket->node())); + } + } + return names.as_span(); } /* Returns true on success. */ -static bool compute_global_inputs(nodes::MFNetworkTreeMap &network_map, +static bool compute_global_inputs(MFNetworkTreeMap &network_map, ResourceCollector &resources, - Span<const fn::MFInputSocket *> sockets, - MutableSpan<fn::GMutableSpan> r_results) + Span<const MFInputSocket *> sockets, + MutableSpan<GMutableSpan> r_results) { int amount = sockets.size(); if (amount == 0) { @@ -65,28 +153,28 @@ static bool compute_global_inputs(nodes::MFNetworkTreeMap &network_map, return false; } - fn::MFNetworkEvaluator network_fn{{}, sockets}; - fn::MFParamsBuilder params{network_fn, 1}; + MFNetworkEvaluator network_fn{{}, sockets}; + MFParamsBuilder params{network_fn, 1}; for (int param_index : network_fn.param_indices()) { - fn::MFParamType param_type = network_fn.param_type(param_index); - BLI_assert(param_type.category() == fn::MFParamType::Category::SingleOutput); /* For now. */ - const fn::CPPType &type = param_type.data_type().single_type(); + MFParamType param_type = network_fn.param_type(param_index); + BLI_assert(param_type.category() == MFParamType::Category::SingleOutput); /* For now. */ + const CPPType &type = param_type.data_type().single_type(); void *buffer = resources.linear_allocator().allocate(type.size(), type.alignment()); resources.add(buffer, type.destruct_cb(), AT); - fn::GMutableSpan span{type, buffer, 1}; + GMutableSpan span{type, buffer, 1}; r_results[param_index] = span; params.add_uninitialized_single_output(span); } - fn::MFContextBuilder context; + MFContextBuilder context; network_fn.call(IndexRange(1), params, context); return true; } static std::optional<Array<std::string>> compute_global_string_inputs( - nodes::MFNetworkTreeMap &network_map, Span<const fn::MFInputSocket *> sockets) + MFNetworkTreeMap &network_map, Span<const MFInputSocket *> sockets) { ResourceCollector local_resources; - Array<fn::GMutableSpan> computed_values(sockets.size(), NoInitialization()); + Array<GMutableSpan> computed_values(sockets.size(), NoInitialization()); if (!compute_global_inputs(network_map, local_resources, sockets, computed_values)) { return {}; } @@ -98,107 +186,177 @@ static std::optional<Array<std::string>> compute_global_string_inputs( return strings; } -static void find_and_deduplicate_particle_attribute_nodes(nodes::MFNetworkTreeMap &network_map, - DummyDataSources &r_data_sources) +/** + * This will find all the particle attribute input nodes. Then it will compute the attribute names + * by evaluating the network (those names should not depend on per particle data). In the end, + * input nodes that access the same attribute are combined. + */ +static void prepare_particle_attribute_nodes(CollectContext &context) { - fn::MFNetwork &network = network_map.network(); - const nodes::DerivedNodeTree &tree = network_map.tree(); - - Span<const nodes::DNode *> attribute_dnodes = tree.nodes_by_type( - "SimulationNodeParticleAttribute"); + Span<const DNode *> attribute_dnodes = nodes_by_type(context, "SimulationNodeParticleAttribute"); - Vector<fn::MFInputSocket *> name_sockets; - for (const nodes::DNode *dnode : attribute_dnodes) { - fn::MFInputSocket &name_socket = network_map.lookup_dummy(dnode->input(0)); + Vector<MFInputSocket *> name_sockets; + for (const DNode *dnode : attribute_dnodes) { + MFInputSocket &name_socket = context.network_map.lookup_dummy(dnode->input(0)); name_sockets.append(&name_socket); } - std::optional<Array<std::string>> attribute_names = compute_global_string_inputs(network_map, - name_sockets); + std::optional<Array<std::string>> attribute_names = compute_global_string_inputs( + context.network_map, name_sockets); if (!attribute_names.has_value()) { return; } - Map<std::pair<std::string, fn::MFDataType>, Vector<fn::MFNode *>> - attribute_nodes_by_name_and_type; + MultiValueMap<std::pair<std::string, MFDataType>, MFNode *> attribute_nodes_by_name_and_type; for (int i : attribute_names->index_range()) { - attribute_nodes_by_name_and_type - .lookup_or_add_default( - {(*attribute_names)[i], name_sockets[i]->node().output(0).data_type()}) - .append(&name_sockets[i]->node()); + attribute_nodes_by_name_and_type.add( + {(*attribute_names)[i], name_sockets[i]->node().output(0).data_type()}, + &name_sockets[i]->node()); } - Map<const fn::MFOutputSocket *, std::string> attribute_inputs; + Map<const MFOutputSocket *, std::string> attribute_inputs; for (auto item : attribute_nodes_by_name_and_type.items()) { StringRef attribute_name = item.key.first; - fn::MFDataType data_type = item.key.second; - Span<fn::MFNode *> nodes = item.value; + MFDataType data_type = item.key.second; + Span<MFNode *> nodes = item.value; - fn::MFOutputSocket &new_attribute_socket = network.add_input( + MFOutputSocket &new_attribute_socket = context.network.add_input( "Attribute '" + attribute_name + "'", data_type); - for (fn::MFNode *node : nodes) { - network.relink(node->output(0), new_attribute_socket); + for (MFNode *node : nodes) { + context.network.relink(node->output(0), new_attribute_socket); + } + context.network.remove(nodes); + + context.data_sources.particle_attributes.add_new(&new_attribute_socket, attribute_name); + } +} + +static void prepare_time_input_nodes(CollectContext &context) +{ + Span<const DNode *> time_input_dnodes = nodes_by_type(context, "SimulationNodeTime"); + Vector<const DNode *> simulation_time_inputs; + Vector<const DNode *> scene_time_inputs; + for (const DNode *dnode : time_input_dnodes) { + NodeSimInputTimeType type = (NodeSimInputTimeType)dnode->node_ref().bnode()->custom1; + switch (type) { + case NODE_SIM_INPUT_SIMULATION_TIME: { + simulation_time_inputs.append(dnode); + break; + } + case NODE_SIM_INPUT_SCENE_TIME: { + scene_time_inputs.append(dnode); + break; + } } - network.remove(nodes); + } - r_data_sources.particle_attributes.add_new(&new_attribute_socket, attribute_name); + if (simulation_time_inputs.size() > 0) { + MFOutputSocket &new_socket = context.network.add_input("Simulation Time", + MFDataType::ForSingle<float>()); + for (const DNode *dnode : simulation_time_inputs) { + MFOutputSocket &old_socket = context.network_map.lookup_dummy(dnode->output(0)); + context.network.relink(old_socket, new_socket); + context.network.remove(old_socket.node()); + } + context.data_sources.simulation_time.add(&new_socket); + } + if (scene_time_inputs.size() > 0) { + MFOutputSocket &new_socket = context.network.add_input("Scene Time", + MFDataType::ForSingle<float>()); + for (const DNode *dnode : scene_time_inputs) { + MFOutputSocket &old_socket = context.network_map.lookup_dummy(dnode->output(0)); + context.network.relink(old_socket, new_socket); + context.network.remove(old_socket.node()); + } + context.data_sources.scene_time.add(&new_socket); } } class ParticleAttributeInput : public ParticleFunctionInput { private: std::string attribute_name_; - const fn::CPPType &attribute_type_; + const CPPType &attribute_type_; public: - ParticleAttributeInput(std::string attribute_name, const fn::CPPType &attribute_type) + ParticleAttributeInput(std::string attribute_name, const CPPType &attribute_type) : attribute_name_(std::move(attribute_name)), attribute_type_(attribute_type) { } - void add_input(fn::AttributesRef attributes, - fn::MFParamsBuilder ¶ms, + void add_input(ParticleFunctionInputContext &context, + MFParamsBuilder ¶ms, ResourceCollector &UNUSED(resources)) const override { - std::optional<fn::GSpan> span = attributes.try_get(attribute_name_, attribute_type_); + std::optional<GSpan> span = context.particles.attributes.try_get(attribute_name_, + attribute_type_); if (span.has_value()) { params.add_readonly_single_input(*span); } else { - params.add_readonly_single_input(fn::GVSpan::FromDefault(attribute_type_)); + params.add_readonly_single_input(GVSpan::FromDefault(attribute_type_)); } } }; +class SceneTimeInput : public ParticleFunctionInput { + void add_input(ParticleFunctionInputContext &context, + MFParamsBuilder ¶ms, + ResourceCollector &resources) const override + { + const float time = DEG_get_ctime(&context.solve_context.depsgraph); + float *time_ptr = &resources.construct<float>(AT, time); + params.add_readonly_single_input(time_ptr); + } +}; + +class SimulationTimeInput : public ParticleFunctionInput { + void add_input(ParticleFunctionInputContext &context, + MFParamsBuilder ¶ms, + ResourceCollector &resources) const override + { + /* TODO: Vary this per particle. */ + const float time = context.solve_context.solve_interval.stop(); + float *time_ptr = &resources.construct<float>(AT, time); + params.add_readonly_single_input(time_ptr); + } +}; + static const ParticleFunction *create_particle_function_for_inputs( - Span<const fn::MFInputSocket *> sockets_to_compute, - ResourceCollector &resources, - DummyDataSources &data_sources) + CollectContext &context, Span<const MFInputSocket *> sockets_to_compute) { BLI_assert(sockets_to_compute.size() >= 1); - const fn::MFNetwork &network = sockets_to_compute[0]->node().network(); + const MFNetwork &network = sockets_to_compute[0]->node().network(); - VectorSet<const fn::MFOutputSocket *> dummy_deps; - VectorSet<const fn::MFInputSocket *> unlinked_input_deps; + VectorSet<const MFOutputSocket *> dummy_deps; + VectorSet<const MFInputSocket *> unlinked_input_deps; network.find_dependencies(sockets_to_compute, dummy_deps, unlinked_input_deps); BLI_assert(unlinked_input_deps.size() == 0); Vector<const ParticleFunctionInput *> per_particle_inputs; - for (const fn::MFOutputSocket *socket : dummy_deps) { - const std::string *attribute_name = data_sources.particle_attributes.lookup_ptr(socket); - if (attribute_name == nullptr) { - return nullptr; + for (const MFOutputSocket *socket : dummy_deps) { + if (context.data_sources.particle_attributes.contains(socket)) { + const std::string *attribute_name = context.data_sources.particle_attributes.lookup_ptr( + socket); + if (attribute_name == nullptr) { + return nullptr; + } + per_particle_inputs.append(&context.resources.construct<ParticleAttributeInput>( + AT, *attribute_name, socket->data_type().single_type())); + } + else if (context.data_sources.scene_time.contains(socket)) { + per_particle_inputs.append(&context.resources.construct<SceneTimeInput>(AT)); + } + else if (context.data_sources.simulation_time.contains(socket)) { + per_particle_inputs.append(&context.resources.construct<SimulationTimeInput>(AT)); } - per_particle_inputs.append(&resources.construct<ParticleAttributeInput>( - AT, *attribute_name, socket->data_type().single_type())); } - const fn::MultiFunction &per_particle_fn = resources.construct<fn::MFNetworkEvaluator>( + const MultiFunction &per_particle_fn = context.resources.construct<MFNetworkEvaluator>( AT, dummy_deps.as_span(), sockets_to_compute); Array<bool> output_is_global(sockets_to_compute.size(), false); - const ParticleFunction &particle_fn = resources.construct<ParticleFunction>( + const ParticleFunction &particle_fn = context.resources.construct<ParticleFunction>( AT, nullptr, &per_particle_fn, @@ -220,13 +378,12 @@ class ParticleFunctionForce : public ParticleForce { void add_force(ParticleForceContext &context) const override { - IndexMask mask = context.particle_chunk().index_mask(); - MutableSpan<float3> r_combined_force = context.force_dst(); + IndexMask mask = context.particles.index_mask; + MutableSpan<float3> r_combined_force = context.force_dst; - ParticleFunctionEvaluator evaluator{ - particle_fn_, context.solve_context(), context.particle_chunk()}; + ParticleFunctionEvaluator evaluator{particle_fn_, context.solve_context, context.particles}; evaluator.compute(); - fn::VSpan<float3> forces = evaluator.get<float3>(0, "Force"); + VSpan<float3> forces = evaluator.get<float3>(0, "Force"); for (int64_t i : mask) { r_combined_force[i] += forces[i]; @@ -234,221 +391,365 @@ class ParticleFunctionForce : public ParticleForce { } }; -static Vector<const ParticleForce *> create_forces_for_particle_simulation( - const nodes::DNode &simulation_node, - nodes::MFNetworkTreeMap &network_map, - ResourceCollector &resources, - DummyDataSources &data_sources) +static void create_forces_for_particle_simulation(CollectContext &context, + const DNode &simulation_node) { Vector<const ParticleForce *> forces; - for (const nodes::DOutputSocket *origin_socket : - simulation_node.input(2, "Forces").linked_sockets()) { - const nodes::DNode &origin_node = origin_socket->node(); + for (const DOutputSocket *origin_socket : simulation_node.input(2, "Forces").linked_sockets()) { + const DNode &origin_node = origin_socket->node(); if (origin_node.idname() != "SimulationNodeForce") { continue; } - const fn::MFInputSocket &force_socket = network_map.lookup_dummy( + const MFInputSocket &force_socket = context.network_map.lookup_dummy( origin_node.input(0, "Force")); - const ParticleFunction *particle_fn = create_particle_function_for_inputs( - {&force_socket}, resources, data_sources); + const ParticleFunction *particle_fn = create_particle_function_for_inputs(context, + {&force_socket}); if (particle_fn == nullptr) { continue; } - const ParticleForce &force = resources.construct<ParticleFunctionForce>(AT, *particle_fn); + const ParticleForce &force = context.resources.construct<ParticleFunctionForce>(AT, + *particle_fn); forces.append(&force); } - return forces; + + StringRef particle_name = get_identifier(context, simulation_node); + context.influences.particle_forces.add_multiple_as(particle_name, forces); +} + +static void collect_forces(CollectContext &context) +{ + for (const DNode *dnode : context.particle_simulation_nodes) { + create_forces_for_particle_simulation(context, *dnode); + } +} + +static ParticleEmitter *create_particle_emitter(CollectContext &context, const DNode &dnode) +{ + Array<StringRefNull> names = find_linked_particle_simulations(context, dnode.output(0)); + if (names.size() == 0) { + return nullptr; + } + + Array<const MFInputSocket *> input_sockets{dnode.inputs().size()}; + for (int i : input_sockets.index_range()) { + input_sockets[i] = &context.network_map.lookup_dummy(dnode.input(i)); + } + + if (context.network.have_dummy_or_unlinked_dependencies(input_sockets)) { + return nullptr; + } + + MultiFunction &inputs_fn = context.resources.construct<MFNetworkEvaluator>( + AT, Span<const MFOutputSocket *>(), input_sockets.as_span()); + + StringRefNull own_state_name = get_identifier(context, dnode); + context.required_states.add(own_state_name, SIM_TYPE_NAME_PARTICLE_MESH_EMITTER); + ParticleEmitter &emitter = context.resources.construct<ParticleMeshEmitter>( + AT, own_state_name, names.as_span(), inputs_fn); + return &emitter; } -static void collect_forces(nodes::MFNetworkTreeMap &network_map, - ResourceCollector &resources, - DummyDataSources &data_sources, - SimulationInfluences &r_influences) +static void collect_emitters(CollectContext &context) { - for (const nodes::DNode *dnode : get_particle_simulation_nodes(network_map.tree())) { - std::string name = dnode_to_path(*dnode); - Vector<const ParticleForce *> forces = create_forces_for_particle_simulation( - *dnode, network_map, resources, data_sources); - r_influences.particle_forces.add_new(std::move(name), std::move(forces)); + for (const DNode *dnode : nodes_by_type(context, "SimulationNodeParticleMeshEmitter")) { + ParticleEmitter *emitter = create_particle_emitter(context, *dnode); + if (emitter != nullptr) { + context.influences.particle_emitters.append(emitter); + } } } -class MyBasicEmitter : public ParticleEmitter { +static void collect_birth_events(CollectContext &context) +{ + for (const DNode *event_dnode : nodes_by_type(context, "SimulationNodeParticleBirthEvent")) { + const DInputSocket &execute_input = event_dnode->input(0); + if (execute_input.linked_sockets().size() != 1) { + continue; + } + + Array<StringRefNull> particle_names = find_linked_particle_simulations(context, + event_dnode->output(0)); + + const DOutputSocket &execute_source = *execute_input.linked_sockets()[0]; + const ParticleAction *action = create_particle_action(context, execute_source, particle_names); + if (action == nullptr) { + continue; + } + + for (StringRefNull particle_name : particle_names) { + context.influences.particle_birth_actions.add_as(particle_name, action); + } + } +} + +static void collect_time_step_events(CollectContext &context) +{ + for (const DNode *event_dnode : nodes_by_type(context, "SimulationNodeParticleTimeStepEvent")) { + const DInputSocket &execute_input = event_dnode->input(0); + if (execute_input.linked_sockets().size() != 1) { + continue; + } + + Array<StringRefNull> particle_names = find_linked_particle_simulations(context, + event_dnode->output(0)); + + const DOutputSocket &execute_source = *execute_input.linked_sockets()[0]; + const ParticleAction *action = create_particle_action(context, execute_source, particle_names); + if (action == nullptr) { + continue; + } + + NodeSimParticleTimeStepEventType type = + (NodeSimParticleTimeStepEventType)event_dnode->node_ref().bnode()->custom1; + if (type == NODE_PARTICLE_TIME_STEP_EVENT_BEGIN) { + for (StringRefNull particle_name : particle_names) { + context.influences.particle_time_step_begin_actions.add_as(particle_name, action); + } + } + else { + for (StringRefNull particle_name : particle_names) { + context.influences.particle_time_step_end_actions.add_as(particle_name, action); + } + } + } +} + +class SequenceParticleAction : public ParticleAction { private: - Array<std::string> names_; - std::string my_state_; - const fn::MultiFunction &inputs_fn_; - uint32_t seed_; + Vector<const ParticleAction *> actions_; public: - MyBasicEmitter(Array<std::string> names, - std::string my_state, - const fn::MultiFunction &inputs_fn, - uint32_t seed) - : names_(std::move(names)), - my_state_(std::move(my_state)), - inputs_fn_(inputs_fn), - seed_(seed) + SequenceParticleAction(Span<const ParticleAction *> actions) : actions_(std::move(actions)) { } - void emit(ParticleEmitterContext &context) const override + void execute(ParticleActionContext &context) const override { - auto *state = context.solve_context().state_map().lookup<ParticleMeshEmitterSimulationState>( - my_state_); - if (state == nullptr) { - return; + for (const ParticleAction *action : actions_) { + action->execute(context); } + } +}; - fn::MFContextBuilder mf_context; - mf_context.add_global_context("PersistentDataHandleMap", - &context.solve_context().handle_map()); +class SetParticleAttributeAction : public ParticleAction { + private: + std::string attribute_name_; + const CPPType &cpp_type_; + const ParticleFunction &inputs_fn_; - fn::MFParamsBuilder mf_params{inputs_fn_, 1}; - bke::PersistentObjectHandle object_handle; - float rate; - mf_params.add_uninitialized_single_output(&object_handle); - mf_params.add_uninitialized_single_output(&rate); - inputs_fn_.call(IndexRange(1), mf_params, mf_context); + public: + SetParticleAttributeAction(std::string attribute_name, + const CPPType &cpp_type, + const ParticleFunction &inputs_fn) + : attribute_name_(std::move(attribute_name)), cpp_type_(cpp_type), inputs_fn_(inputs_fn) + { + } - const Object *object = context.solve_context().handle_map().lookup(object_handle); - if (object == nullptr) { + void execute(ParticleActionContext &context) const override + { + std::optional<GMutableSpan> attribute_array = context.particles.attributes.try_get( + attribute_name_, cpp_type_); + if (!attribute_array.has_value()) { return; } - Vector<float3> new_positions; - Vector<float3> new_velocities; - Vector<float> new_birth_times; - - TimeInterval time_interval = context.simulation_time_interval(); - float start_time = time_interval.start(); - RandomNumberGenerator rng{(*(uint32_t *)&start_time) ^ seed_}; - - const float time_between_particles = 1.0f / rate; - while (state->last_birth_time + time_between_particles < time_interval.end()) { - new_positions.append(rng.get_unit_float3() * 0.3 + float3(object->loc)); - new_velocities.append(rng.get_unit_float3()); - const float birth_time = state->last_birth_time + time_between_particles; - new_birth_times.append(birth_time); - state->last_birth_time = birth_time; - } - - for (StringRef name : names_) { - ParticleAllocator *allocator = context.try_get_particle_allocator(name); - if (allocator == nullptr) { - return; - } - - int amount = new_positions.size(); - fn::MutableAttributesRef attributes = allocator->allocate(amount); + ParticleFunctionEvaluator evaluator{inputs_fn_, context.solve_context, context.particles}; + evaluator.compute(); + GVSpan values = evaluator.get(0); - initialized_copy_n(new_positions.data(), amount, attributes.get<float3>("Position").data()); - initialized_copy_n(new_velocities.data(), amount, attributes.get<float3>("Velocity").data()); - initialized_copy_n( - new_birth_times.data(), amount, attributes.get<float>("Birth Time").data()); + if (values.is_single_element()) { + cpp_type_.fill_initialized_indices( + values.as_single_element(), attribute_array->data(), context.particles.index_mask); + } + else { + GSpan value_array = values.as_full_array(); + cpp_type_.copy_to_initialized_indices( + value_array.data(), attribute_array->data(), context.particles.index_mask); } } }; -static Vector<const nodes::DNode *> find_linked_particle_simulations( - const nodes::DOutputSocket &output_socket) +static const ParticleAction *concatenate_actions(CollectContext &context, + Span<const ParticleAction *> actions) { - Vector<const nodes::DNode *> simulation_nodes; - for (const nodes::DInputSocket *target_socket : output_socket.linked_sockets()) { - if (target_socket->node().idname() == "SimulationNodeParticleSimulation") { - simulation_nodes.append(&target_socket->node()); + Vector<const ParticleAction *> non_null_actions; + for (const ParticleAction *action : actions) { + if (action != nullptr) { + non_null_actions.append(action); } } - return simulation_nodes; + if (non_null_actions.size() == 0) { + return nullptr; + } + if (non_null_actions.size() == 1) { + return non_null_actions[0]; + } + return &context.resources.construct<SequenceParticleAction>(AT, std::move(non_null_actions)); } -static ParticleEmitter *create_particle_emitter(const nodes::DNode &dnode, - ResourceCollector &resources, - nodes::MFNetworkTreeMap &network_map, - RequiredStates &r_required_states) +static const ParticleAction *create_set_particle_attribute_action( + CollectContext &context, const DOutputSocket &dsocket, Span<StringRefNull> particle_names) { - Vector<const nodes::DNode *> simulation_dnodes = find_linked_particle_simulations( - dnode.output(0)); - if (simulation_dnodes.size() == 0) { + const DNode &dnode = dsocket.node(); + MFInputSocket &name_socket = context.network_map.lookup_dummy(dnode.input(1)); + MFInputSocket &value_socket = name_socket.node().input(1); + std::optional<Array<std::string>> names = compute_global_string_inputs(context.network_map, + {&name_socket}); + if (!names.has_value()) { return nullptr; } - Array<std::string> names{simulation_dnodes.size()}; - for (int i : simulation_dnodes.index_range()) { - names[i] = dnode_to_path(*simulation_dnodes[i]); + std::string attribute_name = (*names)[0]; + const CPPType &attribute_type = value_socket.data_type().single_type(); + + const ParticleFunction *inputs_fn = create_particle_function_for_inputs(context, + {&value_socket}); + if (inputs_fn == nullptr) { + return nullptr; } - Array<const fn::MFInputSocket *> input_sockets{dnode.inputs().size()}; - for (int i : input_sockets.index_range()) { - input_sockets[i] = &network_map.lookup_dummy(dnode.input(i)); + for (StringRef particle_name : particle_names) { + context.influences.particle_attributes_builder.lookup_as(particle_name) + ->add(attribute_name, attribute_type); } - if (network_map.network().have_dummy_or_unlinked_dependencies(input_sockets)) { + ParticleAction &this_action = context.resources.construct<SetParticleAttributeAction>( + AT, attribute_name, attribute_type, *inputs_fn); + + const ParticleAction *previous_action = create_particle_action( + context, dnode.input(0), particle_names); + + return concatenate_actions(context, {previous_action, &this_action}); +} + +class ParticleConditionAction : public ParticleAction { + private: + const ParticleFunction &inputs_fn_; + const ParticleAction *action_true_; + const ParticleAction *action_false_; + + public: + ParticleConditionAction(const ParticleFunction &inputs_fn, + const ParticleAction *action_true, + const ParticleAction *action_false) + : inputs_fn_(inputs_fn), action_true_(action_true), action_false_(action_false) + { + } + + void execute(ParticleActionContext &context) const override + { + ParticleFunctionEvaluator evaluator{inputs_fn_, context.solve_context, context.particles}; + evaluator.compute(); + VSpan<bool> conditions = evaluator.get<bool>(0, "Condition"); + + if (conditions.is_single_element()) { + const bool condition = conditions.as_single_element(); + if (condition) { + if (action_true_ != nullptr) { + action_true_->execute(context); + } + } + else { + if (action_false_ != nullptr) { + action_false_->execute(context); + } + } + } + else { + Span<bool> conditions_array = conditions.as_full_array(); + + Vector<int64_t> true_indices; + Vector<int64_t> false_indices; + for (int i : context.particles.index_mask) { + if (conditions_array[i]) { + true_indices.append(i); + } + else { + false_indices.append(i); + } + } + + if (action_true_ != nullptr) { + ParticleChunkContext chunk_context{true_indices.as_span(), context.particles.attributes}; + ParticleActionContext action_context{context.solve_context, chunk_context}; + action_true_->execute(action_context); + } + if (action_false_ != nullptr) { + ParticleChunkContext chunk_context{false_indices.as_span(), context.particles.attributes}; + ParticleActionContext action_context{context.solve_context, chunk_context}; + action_false_->execute(action_context); + } + } + } +}; + +static const ParticleAction *create_particle_condition_action(CollectContext &context, + const DOutputSocket &dsocket, + Span<StringRefNull> particle_names) +{ + const DNode &dnode = dsocket.node(); + MFInputSocket &condition_socket = context.network_map.lookup_dummy(dnode.input(0)); + + const ParticleFunction *inputs_fn = create_particle_function_for_inputs(context, + {&condition_socket}); + if (inputs_fn == nullptr) { return nullptr; } - fn::MultiFunction &inputs_fn = resources.construct<fn::MFNetworkEvaluator>( - AT, Span<const fn::MFOutputSocket *>(), input_sockets.as_span()); + const ParticleAction *true_action = create_particle_action( + context, dnode.input(1), particle_names); + const ParticleAction *false_action = create_particle_action( + context, dnode.input(2), particle_names); - std::string my_state_name = dnode_to_path(dnode); - r_required_states.add(my_state_name, SIM_TYPE_NAME_PARTICLE_MESH_EMITTER); - uint32_t seed = DefaultHash<std::string>{}(my_state_name); - ParticleEmitter &emitter = resources.construct<MyBasicEmitter>( - AT, std::move(names), std::move(my_state_name), inputs_fn, seed); - return &emitter; + if (true_action == nullptr && false_action == nullptr) { + return nullptr; + } + return &context.resources.construct<ParticleConditionAction>( + AT, *inputs_fn, true_action, false_action); } -static void collect_emitters(nodes::MFNetworkTreeMap &network_map, - ResourceCollector &resources, - SimulationInfluences &r_influences, - RequiredStates &r_required_states) +static const ParticleAction *create_particle_action(CollectContext &context, + const DOutputSocket &dsocket, + Span<StringRefNull> particle_names) { - for (const nodes::DNode *dnode : - network_map.tree().nodes_by_type("SimulationNodeParticleMeshEmitter")) { - ParticleEmitter *emitter = create_particle_emitter( - *dnode, resources, network_map, r_required_states); - if (emitter != nullptr) { - r_influences.particle_emitters.append(emitter); - } + const DNode &dnode = dsocket.node(); + if (dnode.idname() == "SimulationNodeSetParticleAttribute") { + return create_set_particle_attribute_action(context, dsocket, particle_names); + } + if (dnode.idname() == "SimulationNodeExecuteCondition") { + return create_particle_condition_action(context, dsocket, particle_names); } + return nullptr; } -static void prepare_particle_attribute_builders(nodes::MFNetworkTreeMap &network_map, - ResourceCollector &resources, - SimulationInfluences &r_influences) +static void initialize_particle_attribute_builders(CollectContext &context) { - for (const nodes::DNode *dnode : get_particle_simulation_nodes(network_map.tree())) { - std::string name = dnode_to_path(*dnode); - fn::AttributesInfoBuilder &builder = resources.construct<fn::AttributesInfoBuilder>(AT); - builder.add<float3>("Position", {0, 0, 0}); - builder.add<float3>("Velocity", {0, 0, 0}); - builder.add<int>("ID", 0); + for (const DNode *dnode : context.particle_simulation_nodes) { + StringRef name = get_identifier(context, *dnode); + AttributesInfoBuilder &attributes_builder = context.resources.construct<AttributesInfoBuilder>( + AT); + attributes_builder.add<float3>("Position", {0, 0, 0}); + attributes_builder.add<float3>("Velocity", {0, 0, 0}); + attributes_builder.add<int>("ID", 0); /* TODO: Use bool property, but need to add CD_PROP_BOOL first. */ - builder.add<int>("Dead", 0); - builder.add<float>("Birth Time", 0.0f); - r_influences.particle_attributes_builder.add_new(std::move(name), &builder); + attributes_builder.add<int>("Dead", 0); + /* TODO: Use uint32_t, but we don't have a corresponding custom property type. */ + attributes_builder.add<int>("Hash", 0); + attributes_builder.add<float>("Birth Time", 0.0f); + context.influences.particle_attributes_builder.add_new(name, &attributes_builder); } } -static void find_used_data_blocks(const nodes::DerivedNodeTree &tree, - SimulationInfluences &r_influences) +static void optimize_function_network(CollectContext &context) { - const bNodeSocketType *socktype = nodeSocketTypeFind("NodeSocketObject"); - BLI_assert(socktype != nullptr); - - for (const nodes::DInputSocket *dsocket : tree.input_sockets()) { - const bNodeSocket *bsocket = dsocket->bsocket(); - if (bsocket->typeinfo == socktype) { - Object *value = ((const bNodeSocketValueObject *)bsocket->default_value)->value; - if (value != nullptr) { - r_influences.used_data_blocks.add(&value->id); - } - } - } + fn::mf_network_optimization::constant_folding(context.network, context.resources); + fn::mf_network_optimization::common_subnetwork_elimination(context.network); + fn::mf_network_optimization::dead_node_removal(context.network); + // WM_clipboard_text_set(network.to_dot().c_str(), false); } void collect_simulation_influences(Simulation &simulation, @@ -456,30 +757,28 @@ void collect_simulation_influences(Simulation &simulation, SimulationInfluences &r_influences, RequiredStates &r_required_states) { - nodes::NodeTreeRefMap tree_refs; - const nodes::DerivedNodeTree tree{simulation.nodetree, tree_refs}; + NodeTreeRefMap tree_refs; + const DerivedNodeTree tree{simulation.nodetree, tree_refs}; - fn::MFNetwork &network = resources.construct<fn::MFNetwork>(AT); - nodes::MFNetworkTreeMap network_map = insert_node_tree_into_mf_network(network, tree, resources); + MFNetwork &network = resources.construct<MFNetwork>(AT); + MFNetworkTreeMap network_map = insert_node_tree_into_mf_network(network, tree, resources); - prepare_particle_attribute_builders(network_map, resources, r_influences); + CollectContext context{r_influences, r_required_states, resources, network_map}; + initialize_particle_attribute_builders(context); - DummyDataSources data_sources; - find_and_deduplicate_particle_attribute_nodes(network_map, data_sources); + prepare_particle_attribute_nodes(context); + prepare_time_input_nodes(context); - fn::mf_network_optimization::constant_folding(network, resources); - fn::mf_network_optimization::common_subnetwork_elimination(network); - fn::mf_network_optimization::dead_node_removal(network); - // WM_clipboard_text_set(network.to_dot().c_str(), false); + collect_forces(context); + collect_emitters(context); + collect_birth_events(context); + collect_time_step_events(context); - collect_forces(network_map, resources, data_sources, r_influences); - collect_emitters(network_map, resources, r_influences, r_required_states); + optimize_function_network(context); - for (const nodes::DNode *dnode : get_particle_simulation_nodes(tree)) { - r_required_states.add(dnode_to_path(*dnode), SIM_TYPE_NAME_PARTICLE_SIMULATION); + for (const DNode *dnode : context.particle_simulation_nodes) { + r_required_states.add(get_identifier(context, *dnode), SIM_TYPE_NAME_PARTICLE_SIMULATION); } - - find_used_data_blocks(tree, r_influences); } } // namespace blender::sim |