Simulation: move initial simulation code from bf_blenkernel to bf_simulation
I removed bf_blenkernel from `nodes/CMakeLists.txt` again (added it yesterday), because now this was causing me unresolved symbol errors... Without it, cmake seems to link the libraries bf_simulation, bf_blenkernel and bf_nodes in the right order. Not sure if that is just luck or if it is guaranteed. It was possible to fix the issue by using cmakes `LINK_INTERFACE_MULTIPLICITY`, but that is probably bad style.
This commit is contained in:
parent
9582797d4b
commit
3ef59121a4
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@ -61,9 +61,7 @@
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#include "DEG_depsgraph.h"
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#include "DEG_depsgraph_query.h"
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extern "C" {
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void WM_clipboard_text_set(const char *buf, bool selection);
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}
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#include "SIM_simulation_update.hh"
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static void simulation_init_data(ID *id)
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{
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@ -209,640 +207,7 @@ void *BKE_simulation_add(Main *bmain, const char *name)
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return simulation;
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}
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namespace blender::bke {
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static void ensure_attributes_exist(ParticleSimulationState *state)
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{
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if (CustomData_get_layer_named(&state->attributes, CD_PROP_FLOAT3, "Position") == nullptr) {
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CustomData_add_layer_named(
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&state->attributes, CD_PROP_FLOAT3, CD_CALLOC, nullptr, state->tot_particles, "Position");
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}
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if (CustomData_get_layer_named(&state->attributes, CD_PROP_FLOAT3, "Velocity") == nullptr) {
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CustomData_add_layer_named(
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&state->attributes, CD_PROP_FLOAT3, CD_CALLOC, nullptr, state->tot_particles, "Velocity");
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}
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if (CustomData_get_layer_named(&state->attributes, CD_PROP_INT32, "ID") == nullptr) {
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CustomData_add_layer_named(
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&state->attributes, CD_PROP_INT32, CD_CALLOC, nullptr, state->tot_particles, "ID");
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}
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}
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static void copy_states_to_cow(Simulation *simulation_orig, Simulation *simulation_cow)
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{
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BKE_simulation_state_remove_all(simulation_cow);
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simulation_cow->current_frame = simulation_orig->current_frame;
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LISTBASE_FOREACH (SimulationState *, state_orig, &simulation_orig->states) {
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switch ((eSimulationStateType)state_orig->type) {
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case SIM_STATE_TYPE_PARTICLES: {
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ParticleSimulationState *particle_state_orig = (ParticleSimulationState *)state_orig;
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ParticleSimulationState *particle_state_cow = (ParticleSimulationState *)
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BKE_simulation_state_add(simulation_cow, SIM_STATE_TYPE_PARTICLES, state_orig->name);
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particle_state_cow->tot_particles = particle_state_orig->tot_particles;
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CustomData_copy(&particle_state_orig->attributes,
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&particle_state_cow->attributes,
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CD_MASK_ALL,
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CD_DUPLICATE,
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particle_state_orig->tot_particles);
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break;
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}
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}
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}
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}
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static Map<const fn::MFOutputSocket *, std::string> deduplicate_attribute_nodes(
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fn::MFNetwork &network,
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nodes::MFNetworkTreeMap &network_map,
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const nodes::DerivedNodeTree &tree)
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{
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Span<const nodes::DNode *> attribute_dnodes = tree.nodes_by_type(
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"SimulationNodeParticleAttribute");
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uint amount = attribute_dnodes.size();
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if (amount == 0) {
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return {};
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}
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Vector<fn::MFInputSocket *> name_sockets;
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for (const nodes::DNode *dnode : attribute_dnodes) {
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fn::MFInputSocket &name_socket = network_map.lookup_dummy(dnode->input(0));
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name_sockets.append(&name_socket);
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}
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fn::MFNetworkEvaluator network_fn{{}, name_sockets.as_span()};
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fn::MFParamsBuilder params{network_fn, 1};
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Array<std::string> attribute_names{amount, NoInitialization()};
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for (uint i : IndexRange(amount)) {
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params.add_uninitialized_single_output(
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fn::GMutableSpan(fn::CPPType_string, attribute_names.data() + i, 1));
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}
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fn::MFContextBuilder context;
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/* Todo: Check that the names don't depend on dummy nodes. */
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network_fn.call({0}, params, context);
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Map<std::pair<std::string, fn::MFDataType>, Vector<fn::MFNode *>>
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attribute_nodes_by_name_and_type;
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for (uint i : IndexRange(amount)) {
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attribute_nodes_by_name_and_type
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.lookup_or_add_default({attribute_names[i], name_sockets[i]->node().output(0).data_type()})
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.append(&name_sockets[i]->node());
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}
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Map<const fn::MFOutputSocket *, std::string> attribute_inputs;
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for (auto item : attribute_nodes_by_name_and_type.items()) {
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StringRef attribute_name = item.key.first;
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fn::MFDataType data_type = item.key.second;
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Span<fn::MFNode *> nodes = item.value;
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fn::MFOutputSocket &new_attribute_socket = network.add_input(
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"Attribute '" + attribute_name + "'", data_type);
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for (fn::MFNode *node : nodes) {
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network.relink(node->output(0), new_attribute_socket);
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}
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network.remove(nodes);
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attribute_inputs.add_new(&new_attribute_socket, attribute_name);
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}
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return attribute_inputs;
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}
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class CustomDataAttributesRef {
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private:
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Vector<void *> buffers_;
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uint size_;
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std::unique_ptr<fn::AttributesInfo> info_;
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public:
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CustomDataAttributesRef(CustomData &custom_data, uint size)
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{
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fn::AttributesInfoBuilder builder;
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for (const CustomDataLayer &layer : Span(custom_data.layers, custom_data.totlayer)) {
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buffers_.append(layer.data);
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switch (layer.type) {
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case CD_PROP_INT32: {
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builder.add<int32_t>(layer.name, 0);
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break;
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}
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case CD_PROP_FLOAT3: {
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builder.add<float3>(layer.name, {0, 0, 0});
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break;
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}
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}
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}
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info_ = std::make_unique<fn::AttributesInfo>(builder);
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size_ = size;
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}
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operator fn::MutableAttributesRef()
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{
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return fn::MutableAttributesRef(*info_, buffers_, size_);
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}
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operator fn::AttributesRef() const
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{
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return fn::AttributesRef(*info_, buffers_, size_);
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}
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};
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static std::string dnode_to_path(const nodes::DNode &dnode)
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{
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std::string path;
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for (const nodes::DParentNode *parent = dnode.parent(); parent; parent = parent->parent()) {
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path = parent->node_ref().name() + "/" + path;
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}
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path = path + dnode.name();
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return path;
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}
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static void remove_unused_states(Simulation *simulation, const VectorSet<std::string> &state_names)
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{
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LISTBASE_FOREACH_MUTABLE (SimulationState *, state, &simulation->states) {
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if (!state_names.contains(state->name)) {
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BKE_simulation_state_remove(simulation, state);
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}
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}
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}
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static void reset_states(Simulation *simulation)
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{
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LISTBASE_FOREACH (SimulationState *, state, &simulation->states) {
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switch ((eSimulationStateType)state->type) {
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case SIM_STATE_TYPE_PARTICLES: {
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ParticleSimulationState *particle_state = (ParticleSimulationState *)state;
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CustomData_free(&particle_state->attributes, particle_state->tot_particles);
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particle_state->tot_particles = 0;
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break;
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}
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}
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}
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}
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static SimulationState *try_find_state_by_name(Simulation *simulation, StringRef name)
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{
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LISTBASE_FOREACH (SimulationState *, state, &simulation->states) {
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if (state->name == name) {
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return state;
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}
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}
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return nullptr;
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}
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static void add_missing_particle_states(Simulation *simulation, Span<std::string> state_names)
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{
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for (StringRefNull name : state_names) {
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SimulationState *state = try_find_state_by_name(simulation, name);
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if (state != nullptr) {
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BLI_assert(state->type == SIM_STATE_TYPE_PARTICLES);
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continue;
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}
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BKE_simulation_state_add(simulation, SIM_STATE_TYPE_PARTICLES, name.c_str());
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}
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}
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static void reinitialize_empty_simulation_states(Simulation *simulation,
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const nodes::DerivedNodeTree &tree)
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{
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VectorSet<std::string> state_names;
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for (const nodes::DNode *dnode : tree.nodes_by_type("SimulationNodeParticleSimulation")) {
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state_names.add(dnode_to_path(*dnode));
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}
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remove_unused_states(simulation, state_names);
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reset_states(simulation);
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add_missing_particle_states(simulation, state_names);
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}
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static void update_simulation_state_list(Simulation *simulation,
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const nodes::DerivedNodeTree &tree)
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{
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VectorSet<std::string> state_names;
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for (const nodes::DNode *dnode : tree.nodes_by_type("SimulationNodeParticleSimulation")) {
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state_names.add(dnode_to_path(*dnode));
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}
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remove_unused_states(simulation, state_names);
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add_missing_particle_states(simulation, state_names);
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}
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class ParticleFunctionInput {
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public:
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virtual ~ParticleFunctionInput() = default;
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virtual void add_input(fn::AttributesRef attributes,
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fn::MFParamsBuilder ¶ms,
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ResourceCollector &resources) const = 0;
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};
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class ParticleFunction {
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private:
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const fn::MultiFunction *global_fn_;
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const fn::MultiFunction *per_particle_fn_;
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Array<const ParticleFunctionInput *> global_inputs_;
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Array<const ParticleFunctionInput *> per_particle_inputs_;
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Array<bool> output_is_global_;
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Vector<uint> global_output_indices_;
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Vector<uint> per_particle_output_indices_;
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Vector<fn::MFDataType> output_types_;
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Vector<StringRefNull> output_names_;
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friend class ParticleFunctionEvaluator;
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public:
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ParticleFunction(const fn::MultiFunction *global_fn,
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const fn::MultiFunction *per_particle_fn,
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Span<const ParticleFunctionInput *> global_inputs,
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Span<const ParticleFunctionInput *> per_particle_inputs,
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Span<bool> output_is_global)
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: global_fn_(global_fn),
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per_particle_fn_(per_particle_fn),
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global_inputs_(global_inputs),
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per_particle_inputs_(per_particle_inputs),
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output_is_global_(output_is_global)
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{
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for (uint i : output_is_global_.index_range()) {
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if (output_is_global_[i]) {
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uint param_index = global_inputs_.size() + global_output_indices_.size();
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fn::MFParamType param_type = global_fn_->param_type(param_index);
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BLI_assert(param_type.is_output());
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output_types_.append(param_type.data_type());
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output_names_.append(global_fn_->param_name(param_index));
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global_output_indices_.append(i);
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}
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else {
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uint param_index = per_particle_inputs_.size() + per_particle_output_indices_.size();
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fn::MFParamType param_type = per_particle_fn_->param_type(param_index);
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BLI_assert(param_type.is_output());
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output_types_.append(param_type.data_type());
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output_names_.append(per_particle_fn_->param_name(param_index));
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per_particle_output_indices_.append(i);
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}
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}
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}
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};
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class ParticleFunctionEvaluator {
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private:
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ResourceCollector resources_;
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const ParticleFunction &particle_fn_;
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IndexMask mask_;
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fn::MFContextBuilder global_context_;
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fn::MFContextBuilder per_particle_context_;
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fn::AttributesRef particle_attributes_;
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Vector<void *> outputs_;
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bool is_computed_ = false;
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public:
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ParticleFunctionEvaluator(const ParticleFunction &particle_fn,
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IndexMask mask,
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fn::AttributesRef particle_attributes)
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: particle_fn_(particle_fn),
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mask_(mask),
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particle_attributes_(particle_attributes),
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outputs_(particle_fn_.output_types_.size(), nullptr)
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{
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}
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~ParticleFunctionEvaluator()
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{
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for (uint output_index : outputs_.index_range()) {
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void *buffer = outputs_[output_index];
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fn::MFDataType data_type = particle_fn_.output_types_[output_index];
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BLI_assert(data_type.is_single()); /* For now. */
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const fn::CPPType &type = data_type.single_type();
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if (particle_fn_.output_is_global_[output_index]) {
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type.destruct(buffer);
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}
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else {
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type.destruct_indices(outputs_[0], mask_);
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}
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}
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}
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void compute()
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{
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BLI_assert(!is_computed_);
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this->compute_globals();
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this->compute_per_particle();
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is_computed_ = true;
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}
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template<typename T> fn::VSpan<T> get(uint output_index, StringRef expected_name) const
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{
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return this->get(output_index, expected_name).typed<T>();
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}
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fn::GVSpan get(uint output_index, StringRef expected_name) const
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{
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#ifdef DEBUG
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StringRef real_name = particle_fn_.output_names_[output_index];
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BLI_assert(expected_name == real_name);
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BLI_assert(is_computed_);
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#endif
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UNUSED_VARS_NDEBUG(expected_name);
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const void *buffer = outputs_[output_index];
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const fn::CPPType &type = particle_fn_.output_types_[output_index].single_type();
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if (particle_fn_.output_is_global_[output_index]) {
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return fn::GVSpan::FromSingleWithMaxSize(type, buffer);
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}
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else {
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return fn::GVSpan(fn::GSpan(type, buffer, mask_.min_array_size()));
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}
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}
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private:
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void compute_globals()
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{
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if (particle_fn_.global_fn_ == nullptr) {
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return;
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}
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fn::MFParamsBuilder params(*particle_fn_.global_fn_, mask_.min_array_size());
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/* Add input parameters. */
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for (const ParticleFunctionInput *input : particle_fn_.global_inputs_) {
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input->add_input(particle_attributes_, params, resources_);
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}
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/* Add output parameters. */
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for (uint output_index : particle_fn_.global_output_indices_) {
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fn::MFDataType data_type = particle_fn_.output_types_[output_index];
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BLI_assert(data_type.is_single()); /* For now. */
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const fn::CPPType &type = data_type.single_type();
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void *buffer = resources_.linear_allocator().allocate(type.size(), type.alignment());
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params.add_uninitialized_single_output(fn::GMutableSpan(type, buffer, 1));
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outputs_[output_index] = buffer;
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}
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particle_fn_.global_fn_->call({0}, params, global_context_);
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}
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void compute_per_particle()
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{
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if (particle_fn_.per_particle_fn_ == nullptr) {
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return;
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}
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fn::MFParamsBuilder params(*particle_fn_.per_particle_fn_, mask_.min_array_size());
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/* Add input parameters. */
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for (const ParticleFunctionInput *input : particle_fn_.per_particle_inputs_) {
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input->add_input(particle_attributes_, params, resources_);
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}
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/* Add output parameters. */
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for (uint output_index : particle_fn_.per_particle_output_indices_) {
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fn::MFDataType data_type = particle_fn_.output_types_[output_index];
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BLI_assert(data_type.is_single()); /* For now. */
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const fn::CPPType &type = data_type.single_type();
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void *buffer = resources_.linear_allocator().allocate(type.size() * mask_.min_array_size(),
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type.alignment());
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params.add_uninitialized_single_output(
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fn::GMutableSpan(type, buffer, mask_.min_array_size()));
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outputs_[output_index] = buffer;
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}
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particle_fn_.per_particle_fn_->call(mask_, params, global_context_);
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}
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};
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class ParticleAttributeInput : public ParticleFunctionInput {
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private:
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std::string attribute_name_;
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const fn::CPPType &attribute_type_;
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public:
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ParticleAttributeInput(std::string attribute_name, const fn::CPPType &attribute_type)
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: attribute_name_(std::move(attribute_name)), attribute_type_(attribute_type)
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{
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}
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void add_input(fn::AttributesRef attributes,
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fn::MFParamsBuilder ¶ms,
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ResourceCollector &UNUSED(resources)) const override
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{
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std::optional<fn::GSpan> span = attributes.try_get(attribute_name_, attribute_type_);
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if (span.has_value()) {
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params.add_readonly_single_input(*span);
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}
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else {
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params.add_readonly_single_input(fn::GVSpan::FromDefault(attribute_type_));
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}
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}
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};
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static const ParticleFunction *create_particle_function_for_inputs(
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Span<const fn::MFInputSocket *> sockets_to_compute,
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ResourceCollector &resources,
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const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
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{
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BLI_assert(sockets_to_compute.size() >= 1);
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const fn::MFNetwork &network = sockets_to_compute[0]->node().network();
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VectorSet<const fn::MFOutputSocket *> dummy_deps;
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VectorSet<const fn::MFInputSocket *> unlinked_input_deps;
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network.find_dependencies(sockets_to_compute, dummy_deps, unlinked_input_deps);
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BLI_assert(unlinked_input_deps.size() == 0);
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|
||||
Vector<const ParticleFunctionInput *> per_particle_inputs;
|
||||
for (const fn::MFOutputSocket *socket : dummy_deps) {
|
||||
const std::string *attribute_name = attribute_inputs.lookup_ptr(socket);
|
||||
if (attribute_name == nullptr) {
|
||||
return nullptr;
|
||||
}
|
||||
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>(
|
||||
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>(
|
||||
AT,
|
||||
nullptr,
|
||||
&per_particle_fn,
|
||||
Span<const ParticleFunctionInput *>(),
|
||||
per_particle_inputs.as_span(),
|
||||
output_is_global.as_span());
|
||||
|
||||
return &particle_fn;
|
||||
}
|
||||
|
||||
class ParticleForce {
|
||||
public:
|
||||
virtual ~ParticleForce() = default;
|
||||
virtual void add_force(fn::AttributesRef attributes,
|
||||
MutableSpan<float3> r_combined_force) const = 0;
|
||||
};
|
||||
|
||||
class ParticleFunctionForce : public ParticleForce {
|
||||
private:
|
||||
const ParticleFunction &particle_fn_;
|
||||
|
||||
public:
|
||||
ParticleFunctionForce(const ParticleFunction &particle_fn) : particle_fn_(particle_fn)
|
||||
{
|
||||
}
|
||||
|
||||
void add_force(fn::AttributesRef attributes, MutableSpan<float3> r_combined_force) const override
|
||||
{
|
||||
IndexMask mask = IndexRange(attributes.size());
|
||||
ParticleFunctionEvaluator evaluator{particle_fn_, mask, attributes};
|
||||
evaluator.compute();
|
||||
fn::VSpan<float3> forces = evaluator.get<float3>(0, "Force");
|
||||
for (uint i : mask) {
|
||||
r_combined_force[i] += forces[i];
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
static Vector<const ParticleForce *> create_forces_for_particle_simulation(
|
||||
const nodes::DNode &simulation_node,
|
||||
nodes::MFNetworkTreeMap &network_map,
|
||||
ResourceCollector &resources,
|
||||
const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
|
||||
{
|
||||
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();
|
||||
if (origin_node.idname() != "SimulationNodeForce") {
|
||||
continue;
|
||||
}
|
||||
|
||||
const fn::MFInputSocket &force_socket = network_map.lookup_dummy(
|
||||
origin_node.input(0, "Force"));
|
||||
|
||||
const ParticleFunction *particle_fn = create_particle_function_for_inputs(
|
||||
{&force_socket}, resources, attribute_inputs);
|
||||
|
||||
if (particle_fn == nullptr) {
|
||||
continue;
|
||||
}
|
||||
|
||||
const ParticleForce &force = resources.construct<ParticleFunctionForce>(AT, *particle_fn);
|
||||
forces.append(&force);
|
||||
}
|
||||
return forces;
|
||||
}
|
||||
|
||||
static Map<std::string, Vector<const ParticleForce *>> collect_forces(
|
||||
nodes::MFNetworkTreeMap &network_map,
|
||||
ResourceCollector &resources,
|
||||
const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
|
||||
{
|
||||
Map<std::string, Vector<const ParticleForce *>> forces_by_simulation;
|
||||
for (const nodes::DNode *dnode :
|
||||
network_map.tree().nodes_by_type("SimulationNodeParticleSimulation")) {
|
||||
std::string name = dnode_to_path(*dnode);
|
||||
Vector<const ParticleForce *> forces = create_forces_for_particle_simulation(
|
||||
*dnode, network_map, resources, attribute_inputs);
|
||||
forces_by_simulation.add_new(std::move(name), std::move(forces));
|
||||
}
|
||||
return forces_by_simulation;
|
||||
}
|
||||
|
||||
static void simulation_data_update(Depsgraph *depsgraph, Scene *scene, Simulation *simulation_cow)
|
||||
{
|
||||
int current_frame = scene->r.cfra;
|
||||
if (simulation_cow->current_frame == current_frame) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Below we modify the original state/cache. Only the active depsgraph is allowed to do that. */
|
||||
if (!DEG_is_active(depsgraph)) {
|
||||
return;
|
||||
}
|
||||
|
||||
Simulation *simulation_orig = (Simulation *)DEG_get_original_id(&simulation_cow->id);
|
||||
|
||||
nodes::NodeTreeRefMap tree_refs;
|
||||
/* TODO: Use simulation_cow, but need to add depsgraph relations before that. */
|
||||
const nodes::DerivedNodeTree tree{simulation_orig->nodetree, tree_refs};
|
||||
fn::MFNetwork network;
|
||||
ResourceCollector resources;
|
||||
nodes::MFNetworkTreeMap network_map = insert_node_tree_into_mf_network(network, tree, resources);
|
||||
Map<const fn::MFOutputSocket *, std::string> attribute_inputs = deduplicate_attribute_nodes(
|
||||
network, network_map, tree);
|
||||
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);
|
||||
|
||||
Map<std::string, Vector<const ParticleForce *>> forces_by_simulation = collect_forces(
|
||||
network_map, resources, attribute_inputs);
|
||||
|
||||
if (current_frame == 1) {
|
||||
reinitialize_empty_simulation_states(simulation_orig, tree);
|
||||
|
||||
RNG *rng = BLI_rng_new(0);
|
||||
|
||||
simulation_orig->current_frame = 1;
|
||||
LISTBASE_FOREACH (ParticleSimulationState *, state, &simulation_orig->states) {
|
||||
state->tot_particles = 1000;
|
||||
CustomData_realloc(&state->attributes, state->tot_particles);
|
||||
ensure_attributes_exist(state);
|
||||
|
||||
CustomDataAttributesRef custom_data_attributes{state->attributes,
|
||||
(uint)state->tot_particles};
|
||||
|
||||
fn::MutableAttributesRef attributes = custom_data_attributes;
|
||||
MutableSpan<float3> positions = attributes.get<float3>("Position");
|
||||
MutableSpan<float3> velocities = attributes.get<float3>("Velocity");
|
||||
MutableSpan<int32_t> ids = attributes.get<int32_t>("ID");
|
||||
|
||||
for (uint i : positions.index_range()) {
|
||||
positions[i] = {i / 100.0f, 0, 0};
|
||||
velocities[i] = {0, BLI_rng_get_float(rng) - 0.5f, BLI_rng_get_float(rng) - 0.5f};
|
||||
ids[i] = i;
|
||||
}
|
||||
}
|
||||
|
||||
BLI_rng_free(rng);
|
||||
|
||||
copy_states_to_cow(simulation_orig, simulation_cow);
|
||||
}
|
||||
else if (current_frame == simulation_orig->current_frame + 1) {
|
||||
update_simulation_state_list(simulation_orig, tree);
|
||||
float time_step = 1.0f / 24.0f;
|
||||
simulation_orig->current_frame = current_frame;
|
||||
|
||||
LISTBASE_FOREACH (ParticleSimulationState *, state, &simulation_orig->states) {
|
||||
ensure_attributes_exist(state);
|
||||
|
||||
CustomDataAttributesRef custom_data_attributes{state->attributes,
|
||||
(uint)state->tot_particles};
|
||||
|
||||
fn::MutableAttributesRef attributes = custom_data_attributes;
|
||||
MutableSpan<float3> positions = attributes.get<float3>("Position");
|
||||
MutableSpan<float3> velocities = attributes.get<float3>("Velocity");
|
||||
|
||||
Array<float3> force_vectors{(uint)state->tot_particles, {0, 0, 0}};
|
||||
Span<const ParticleForce *> forces = forces_by_simulation.lookup_as(state->head.name);
|
||||
for (const ParticleForce *force : forces) {
|
||||
force->add_force(attributes, force_vectors);
|
||||
}
|
||||
|
||||
for (uint i : positions.index_range()) {
|
||||
velocities[i] += force_vectors[i] * time_step;
|
||||
positions[i] += velocities[i] * time_step;
|
||||
}
|
||||
}
|
||||
|
||||
copy_states_to_cow(simulation_orig, simulation_cow);
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace blender::bke
|
||||
|
||||
void BKE_simulation_data_update(Depsgraph *depsgraph, Scene *scene, Simulation *simulation)
|
||||
{
|
||||
blender::bke::simulation_data_update(depsgraph, scene, simulation);
|
||||
blender::sim::update_simulation_in_depsgraph(depsgraph, scene, simulation);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -304,7 +304,6 @@ set(SRC
|
|||
)
|
||||
|
||||
set(LIB
|
||||
bf_blenkernel
|
||||
bf_functions
|
||||
bf_intern_sky
|
||||
)
|
||||
|
|
|
|||
|
|
@ -24,8 +24,11 @@ set(INC
|
|||
../blenkernel
|
||||
../blenlib
|
||||
../depsgraph
|
||||
../functions
|
||||
../imbuf
|
||||
../makesdna
|
||||
../makesrna
|
||||
../nodes
|
||||
../../../intern/guardedalloc
|
||||
)
|
||||
|
||||
|
|
@ -41,11 +44,15 @@ set(SRC
|
|||
intern/implicit.h
|
||||
intern/implicit_blender.c
|
||||
intern/implicit_eigen.cpp
|
||||
intern/simulation_update.cc
|
||||
|
||||
SIM_mass_spring.h
|
||||
SIM_simulation_update.hh
|
||||
)
|
||||
|
||||
set(LIB
|
||||
bf_blenkernel
|
||||
bf_nodes
|
||||
)
|
||||
|
||||
if(WITH_OPENMP_STATIC)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,32 @@
|
|||
/*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#ifndef __SIM_SIMULATION_UPDATE_HH__
|
||||
#define __SIM_SIMULATION_UPDATE_HH__
|
||||
|
||||
struct Depsgraph;
|
||||
struct Scene;
|
||||
struct Simulation;
|
||||
|
||||
namespace blender::sim {
|
||||
|
||||
void update_simulation_in_depsgraph(Depsgraph *depsgraph,
|
||||
Scene *scene_cow,
|
||||
Simulation *simulation_cow);
|
||||
|
||||
}
|
||||
|
||||
#endif /* __SIM_SIMULATION_UPDATE_HH__ */
|
||||
|
|
@ -0,0 +1,678 @@
|
|||
/*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#include "SIM_simulation_update.hh"
|
||||
|
||||
#include "BKE_customdata.h"
|
||||
#include "BKE_simulation.h"
|
||||
|
||||
#include "DNA_scene_types.h"
|
||||
#include "DNA_simulation_types.h"
|
||||
|
||||
#include "DEG_depsgraph_query.h"
|
||||
|
||||
#include "BLI_array.hh"
|
||||
#include "BLI_float3.hh"
|
||||
#include "BLI_listbase.h"
|
||||
#include "BLI_map.hh"
|
||||
#include "BLI_rand.h"
|
||||
#include "BLI_vector.hh"
|
||||
|
||||
#include "NOD_node_tree_multi_function.hh"
|
||||
|
||||
#include "FN_attributes_ref.hh"
|
||||
#include "FN_cpp_types.hh"
|
||||
#include "FN_multi_function_network_evaluation.hh"
|
||||
#include "FN_multi_function_network_optimization.hh"
|
||||
|
||||
extern "C" {
|
||||
void WM_clipboard_text_set(const char *buf, bool selection);
|
||||
}
|
||||
|
||||
namespace blender::sim {
|
||||
|
||||
static void ensure_attributes_exist(ParticleSimulationState *state)
|
||||
{
|
||||
if (CustomData_get_layer_named(&state->attributes, CD_PROP_FLOAT3, "Position") == nullptr) {
|
||||
CustomData_add_layer_named(
|
||||
&state->attributes, CD_PROP_FLOAT3, CD_CALLOC, nullptr, state->tot_particles, "Position");
|
||||
}
|
||||
if (CustomData_get_layer_named(&state->attributes, CD_PROP_FLOAT3, "Velocity") == nullptr) {
|
||||
CustomData_add_layer_named(
|
||||
&state->attributes, CD_PROP_FLOAT3, CD_CALLOC, nullptr, state->tot_particles, "Velocity");
|
||||
}
|
||||
if (CustomData_get_layer_named(&state->attributes, CD_PROP_INT32, "ID") == nullptr) {
|
||||
CustomData_add_layer_named(
|
||||
&state->attributes, CD_PROP_INT32, CD_CALLOC, nullptr, state->tot_particles, "ID");
|
||||
}
|
||||
}
|
||||
|
||||
static void copy_states_to_cow(Simulation *simulation_orig, Simulation *simulation_cow)
|
||||
{
|
||||
BKE_simulation_state_remove_all(simulation_cow);
|
||||
simulation_cow->current_frame = simulation_orig->current_frame;
|
||||
|
||||
LISTBASE_FOREACH (SimulationState *, state_orig, &simulation_orig->states) {
|
||||
switch ((eSimulationStateType)state_orig->type) {
|
||||
case SIM_STATE_TYPE_PARTICLES: {
|
||||
ParticleSimulationState *particle_state_orig = (ParticleSimulationState *)state_orig;
|
||||
ParticleSimulationState *particle_state_cow = (ParticleSimulationState *)
|
||||
BKE_simulation_state_add(simulation_cow, SIM_STATE_TYPE_PARTICLES, state_orig->name);
|
||||
particle_state_cow->tot_particles = particle_state_orig->tot_particles;
|
||||
CustomData_copy(&particle_state_orig->attributes,
|
||||
&particle_state_cow->attributes,
|
||||
CD_MASK_ALL,
|
||||
CD_DUPLICATE,
|
||||
particle_state_orig->tot_particles);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static Map<const fn::MFOutputSocket *, std::string> deduplicate_attribute_nodes(
|
||||
fn::MFNetwork &network,
|
||||
nodes::MFNetworkTreeMap &network_map,
|
||||
const nodes::DerivedNodeTree &tree)
|
||||
{
|
||||
Span<const nodes::DNode *> attribute_dnodes = tree.nodes_by_type(
|
||||
"SimulationNodeParticleAttribute");
|
||||
uint amount = attribute_dnodes.size();
|
||||
if (amount == 0) {
|
||||
return {};
|
||||
}
|
||||
|
||||
Vector<fn::MFInputSocket *> name_sockets;
|
||||
for (const nodes::DNode *dnode : attribute_dnodes) {
|
||||
fn::MFInputSocket &name_socket = network_map.lookup_dummy(dnode->input(0));
|
||||
name_sockets.append(&name_socket);
|
||||
}
|
||||
|
||||
fn::MFNetworkEvaluator network_fn{{}, name_sockets.as_span()};
|
||||
|
||||
fn::MFParamsBuilder params{network_fn, 1};
|
||||
|
||||
Array<std::string> attribute_names{amount, NoInitialization()};
|
||||
for (uint i : IndexRange(amount)) {
|
||||
params.add_uninitialized_single_output(
|
||||
fn::GMutableSpan(fn::CPPType_string, attribute_names.data() + i, 1));
|
||||
}
|
||||
|
||||
fn::MFContextBuilder context;
|
||||
/* Todo: Check that the names don't depend on dummy nodes. */
|
||||
network_fn.call({0}, params, context);
|
||||
|
||||
Map<std::pair<std::string, fn::MFDataType>, Vector<fn::MFNode *>>
|
||||
attribute_nodes_by_name_and_type;
|
||||
for (uint i : IndexRange(amount)) {
|
||||
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());
|
||||
}
|
||||
|
||||
Map<const fn::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;
|
||||
|
||||
fn::MFOutputSocket &new_attribute_socket = network.add_input(
|
||||
"Attribute '" + attribute_name + "'", data_type);
|
||||
for (fn::MFNode *node : nodes) {
|
||||
network.relink(node->output(0), new_attribute_socket);
|
||||
}
|
||||
network.remove(nodes);
|
||||
|
||||
attribute_inputs.add_new(&new_attribute_socket, attribute_name);
|
||||
}
|
||||
|
||||
return attribute_inputs;
|
||||
}
|
||||
|
||||
class CustomDataAttributesRef {
|
||||
private:
|
||||
Vector<void *> buffers_;
|
||||
uint size_;
|
||||
std::unique_ptr<fn::AttributesInfo> info_;
|
||||
|
||||
public:
|
||||
CustomDataAttributesRef(CustomData &custom_data, uint size)
|
||||
{
|
||||
fn::AttributesInfoBuilder builder;
|
||||
for (const CustomDataLayer &layer : Span(custom_data.layers, custom_data.totlayer)) {
|
||||
buffers_.append(layer.data);
|
||||
switch (layer.type) {
|
||||
case CD_PROP_INT32: {
|
||||
builder.add<int32_t>(layer.name, 0);
|
||||
break;
|
||||
}
|
||||
case CD_PROP_FLOAT3: {
|
||||
builder.add<float3>(layer.name, {0, 0, 0});
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
info_ = std::make_unique<fn::AttributesInfo>(builder);
|
||||
size_ = size;
|
||||
}
|
||||
|
||||
operator fn::MutableAttributesRef()
|
||||
{
|
||||
return fn::MutableAttributesRef(*info_, buffers_, size_);
|
||||
}
|
||||
|
||||
operator fn::AttributesRef() const
|
||||
{
|
||||
return fn::AttributesRef(*info_, buffers_, size_);
|
||||
}
|
||||
};
|
||||
|
||||
static std::string dnode_to_path(const nodes::DNode &dnode)
|
||||
{
|
||||
std::string path;
|
||||
for (const nodes::DParentNode *parent = dnode.parent(); parent; parent = parent->parent()) {
|
||||
path = parent->node_ref().name() + "/" + path;
|
||||
}
|
||||
path = path + dnode.name();
|
||||
return path;
|
||||
}
|
||||
|
||||
static void remove_unused_states(Simulation *simulation, const VectorSet<std::string> &state_names)
|
||||
{
|
||||
LISTBASE_FOREACH_MUTABLE (SimulationState *, state, &simulation->states) {
|
||||
if (!state_names.contains(state->name)) {
|
||||
BKE_simulation_state_remove(simulation, state);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void reset_states(Simulation *simulation)
|
||||
{
|
||||
LISTBASE_FOREACH (SimulationState *, state, &simulation->states) {
|
||||
switch ((eSimulationStateType)state->type) {
|
||||
case SIM_STATE_TYPE_PARTICLES: {
|
||||
ParticleSimulationState *particle_state = (ParticleSimulationState *)state;
|
||||
CustomData_free(&particle_state->attributes, particle_state->tot_particles);
|
||||
particle_state->tot_particles = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static SimulationState *try_find_state_by_name(Simulation *simulation, StringRef name)
|
||||
{
|
||||
LISTBASE_FOREACH (SimulationState *, state, &simulation->states) {
|
||||
if (state->name == name) {
|
||||
return state;
|
||||
}
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
static void add_missing_particle_states(Simulation *simulation, Span<std::string> state_names)
|
||||
{
|
||||
for (StringRefNull name : state_names) {
|
||||
SimulationState *state = try_find_state_by_name(simulation, name);
|
||||
if (state != nullptr) {
|
||||
BLI_assert(state->type == SIM_STATE_TYPE_PARTICLES);
|
||||
continue;
|
||||
}
|
||||
|
||||
BKE_simulation_state_add(simulation, SIM_STATE_TYPE_PARTICLES, name.c_str());
|
||||
}
|
||||
}
|
||||
|
||||
static void reinitialize_empty_simulation_states(Simulation *simulation,
|
||||
const nodes::DerivedNodeTree &tree)
|
||||
{
|
||||
VectorSet<std::string> state_names;
|
||||
for (const nodes::DNode *dnode : tree.nodes_by_type("SimulationNodeParticleSimulation")) {
|
||||
state_names.add(dnode_to_path(*dnode));
|
||||
}
|
||||
|
||||
remove_unused_states(simulation, state_names);
|
||||
reset_states(simulation);
|
||||
add_missing_particle_states(simulation, state_names);
|
||||
}
|
||||
|
||||
static void update_simulation_state_list(Simulation *simulation,
|
||||
const nodes::DerivedNodeTree &tree)
|
||||
{
|
||||
VectorSet<std::string> state_names;
|
||||
for (const nodes::DNode *dnode : tree.nodes_by_type("SimulationNodeParticleSimulation")) {
|
||||
state_names.add(dnode_to_path(*dnode));
|
||||
}
|
||||
|
||||
remove_unused_states(simulation, state_names);
|
||||
add_missing_particle_states(simulation, state_names);
|
||||
}
|
||||
|
||||
class ParticleFunctionInput {
|
||||
public:
|
||||
virtual ~ParticleFunctionInput() = default;
|
||||
virtual void add_input(fn::AttributesRef attributes,
|
||||
fn::MFParamsBuilder ¶ms,
|
||||
ResourceCollector &resources) const = 0;
|
||||
};
|
||||
|
||||
class ParticleFunction {
|
||||
private:
|
||||
const fn::MultiFunction *global_fn_;
|
||||
const fn::MultiFunction *per_particle_fn_;
|
||||
Array<const ParticleFunctionInput *> global_inputs_;
|
||||
Array<const ParticleFunctionInput *> per_particle_inputs_;
|
||||
Array<bool> output_is_global_;
|
||||
Vector<uint> global_output_indices_;
|
||||
Vector<uint> per_particle_output_indices_;
|
||||
Vector<fn::MFDataType> output_types_;
|
||||
Vector<StringRefNull> output_names_;
|
||||
|
||||
friend class ParticleFunctionEvaluator;
|
||||
|
||||
public:
|
||||
ParticleFunction(const fn::MultiFunction *global_fn,
|
||||
const fn::MultiFunction *per_particle_fn,
|
||||
Span<const ParticleFunctionInput *> global_inputs,
|
||||
Span<const ParticleFunctionInput *> per_particle_inputs,
|
||||
Span<bool> output_is_global)
|
||||
: global_fn_(global_fn),
|
||||
per_particle_fn_(per_particle_fn),
|
||||
global_inputs_(global_inputs),
|
||||
per_particle_inputs_(per_particle_inputs),
|
||||
output_is_global_(output_is_global)
|
||||
{
|
||||
for (uint i : output_is_global_.index_range()) {
|
||||
if (output_is_global_[i]) {
|
||||
uint param_index = global_inputs_.size() + global_output_indices_.size();
|
||||
fn::MFParamType param_type = global_fn_->param_type(param_index);
|
||||
BLI_assert(param_type.is_output());
|
||||
output_types_.append(param_type.data_type());
|
||||
output_names_.append(global_fn_->param_name(param_index));
|
||||
global_output_indices_.append(i);
|
||||
}
|
||||
else {
|
||||
uint param_index = per_particle_inputs_.size() + per_particle_output_indices_.size();
|
||||
fn::MFParamType param_type = per_particle_fn_->param_type(param_index);
|
||||
BLI_assert(param_type.is_output());
|
||||
output_types_.append(param_type.data_type());
|
||||
output_names_.append(per_particle_fn_->param_name(param_index));
|
||||
per_particle_output_indices_.append(i);
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
class ParticleFunctionEvaluator {
|
||||
private:
|
||||
ResourceCollector resources_;
|
||||
const ParticleFunction &particle_fn_;
|
||||
IndexMask mask_;
|
||||
fn::MFContextBuilder global_context_;
|
||||
fn::MFContextBuilder per_particle_context_;
|
||||
fn::AttributesRef particle_attributes_;
|
||||
Vector<void *> outputs_;
|
||||
bool is_computed_ = false;
|
||||
|
||||
public:
|
||||
ParticleFunctionEvaluator(const ParticleFunction &particle_fn,
|
||||
IndexMask mask,
|
||||
fn::AttributesRef particle_attributes)
|
||||
: particle_fn_(particle_fn),
|
||||
mask_(mask),
|
||||
particle_attributes_(particle_attributes),
|
||||
outputs_(particle_fn_.output_types_.size(), nullptr)
|
||||
{
|
||||
}
|
||||
|
||||
~ParticleFunctionEvaluator()
|
||||
{
|
||||
for (uint output_index : outputs_.index_range()) {
|
||||
void *buffer = outputs_[output_index];
|
||||
fn::MFDataType data_type = particle_fn_.output_types_[output_index];
|
||||
BLI_assert(data_type.is_single()); /* For now. */
|
||||
const fn::CPPType &type = data_type.single_type();
|
||||
|
||||
if (particle_fn_.output_is_global_[output_index]) {
|
||||
type.destruct(buffer);
|
||||
}
|
||||
else {
|
||||
type.destruct_indices(outputs_[0], mask_);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void compute()
|
||||
{
|
||||
BLI_assert(!is_computed_);
|
||||
this->compute_globals();
|
||||
this->compute_per_particle();
|
||||
is_computed_ = true;
|
||||
}
|
||||
|
||||
template<typename T> fn::VSpan<T> get(uint output_index, StringRef expected_name) const
|
||||
{
|
||||
return this->get(output_index, expected_name).typed<T>();
|
||||
}
|
||||
|
||||
fn::GVSpan get(uint output_index, StringRef expected_name) const
|
||||
{
|
||||
#ifdef DEBUG
|
||||
StringRef real_name = particle_fn_.output_names_[output_index];
|
||||
BLI_assert(expected_name == real_name);
|
||||
BLI_assert(is_computed_);
|
||||
#endif
|
||||
UNUSED_VARS_NDEBUG(expected_name);
|
||||
const void *buffer = outputs_[output_index];
|
||||
const fn::CPPType &type = particle_fn_.output_types_[output_index].single_type();
|
||||
if (particle_fn_.output_is_global_[output_index]) {
|
||||
return fn::GVSpan::FromSingleWithMaxSize(type, buffer);
|
||||
}
|
||||
else {
|
||||
return fn::GVSpan(fn::GSpan(type, buffer, mask_.min_array_size()));
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
void compute_globals()
|
||||
{
|
||||
if (particle_fn_.global_fn_ == nullptr) {
|
||||
return;
|
||||
}
|
||||
|
||||
fn::MFParamsBuilder params(*particle_fn_.global_fn_, mask_.min_array_size());
|
||||
|
||||
/* Add input parameters. */
|
||||
for (const ParticleFunctionInput *input : particle_fn_.global_inputs_) {
|
||||
input->add_input(particle_attributes_, params, resources_);
|
||||
}
|
||||
|
||||
/* Add output parameters. */
|
||||
for (uint output_index : particle_fn_.global_output_indices_) {
|
||||
fn::MFDataType data_type = particle_fn_.output_types_[output_index];
|
||||
BLI_assert(data_type.is_single()); /* For now. */
|
||||
|
||||
const fn::CPPType &type = data_type.single_type();
|
||||
void *buffer = resources_.linear_allocator().allocate(type.size(), type.alignment());
|
||||
params.add_uninitialized_single_output(fn::GMutableSpan(type, buffer, 1));
|
||||
outputs_[output_index] = buffer;
|
||||
}
|
||||
|
||||
particle_fn_.global_fn_->call({0}, params, global_context_);
|
||||
}
|
||||
|
||||
void compute_per_particle()
|
||||
{
|
||||
if (particle_fn_.per_particle_fn_ == nullptr) {
|
||||
return;
|
||||
}
|
||||
|
||||
fn::MFParamsBuilder params(*particle_fn_.per_particle_fn_, mask_.min_array_size());
|
||||
|
||||
/* Add input parameters. */
|
||||
for (const ParticleFunctionInput *input : particle_fn_.per_particle_inputs_) {
|
||||
input->add_input(particle_attributes_, params, resources_);
|
||||
}
|
||||
|
||||
/* Add output parameters. */
|
||||
for (uint output_index : particle_fn_.per_particle_output_indices_) {
|
||||
fn::MFDataType data_type = particle_fn_.output_types_[output_index];
|
||||
BLI_assert(data_type.is_single()); /* For now. */
|
||||
|
||||
const fn::CPPType &type = data_type.single_type();
|
||||
void *buffer = resources_.linear_allocator().allocate(type.size() * mask_.min_array_size(),
|
||||
type.alignment());
|
||||
params.add_uninitialized_single_output(
|
||||
fn::GMutableSpan(type, buffer, mask_.min_array_size()));
|
||||
outputs_[output_index] = buffer;
|
||||
}
|
||||
|
||||
particle_fn_.per_particle_fn_->call(mask_, params, global_context_);
|
||||
}
|
||||
};
|
||||
|
||||
class ParticleAttributeInput : public ParticleFunctionInput {
|
||||
private:
|
||||
std::string attribute_name_;
|
||||
const fn::CPPType &attribute_type_;
|
||||
|
||||
public:
|
||||
ParticleAttributeInput(std::string attribute_name, const fn::CPPType &attribute_type)
|
||||
: attribute_name_(std::move(attribute_name)), attribute_type_(attribute_type)
|
||||
{
|
||||
}
|
||||
|
||||
void add_input(fn::AttributesRef attributes,
|
||||
fn::MFParamsBuilder ¶ms,
|
||||
ResourceCollector &UNUSED(resources)) const override
|
||||
{
|
||||
std::optional<fn::GSpan> span = 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_));
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
static const ParticleFunction *create_particle_function_for_inputs(
|
||||
Span<const fn::MFInputSocket *> sockets_to_compute,
|
||||
ResourceCollector &resources,
|
||||
const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
|
||||
{
|
||||
BLI_assert(sockets_to_compute.size() >= 1);
|
||||
const fn::MFNetwork &network = sockets_to_compute[0]->node().network();
|
||||
|
||||
VectorSet<const fn::MFOutputSocket *> dummy_deps;
|
||||
VectorSet<const fn::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 = attribute_inputs.lookup_ptr(socket);
|
||||
if (attribute_name == nullptr) {
|
||||
return nullptr;
|
||||
}
|
||||
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>(
|
||||
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>(
|
||||
AT,
|
||||
nullptr,
|
||||
&per_particle_fn,
|
||||
Span<const ParticleFunctionInput *>(),
|
||||
per_particle_inputs.as_span(),
|
||||
output_is_global.as_span());
|
||||
|
||||
return &particle_fn;
|
||||
}
|
||||
|
||||
class ParticleForce {
|
||||
public:
|
||||
virtual ~ParticleForce() = default;
|
||||
virtual void add_force(fn::AttributesRef attributes,
|
||||
MutableSpan<float3> r_combined_force) const = 0;
|
||||
};
|
||||
|
||||
class ParticleFunctionForce : public ParticleForce {
|
||||
private:
|
||||
const ParticleFunction &particle_fn_;
|
||||
|
||||
public:
|
||||
ParticleFunctionForce(const ParticleFunction &particle_fn) : particle_fn_(particle_fn)
|
||||
{
|
||||
}
|
||||
|
||||
void add_force(fn::AttributesRef attributes, MutableSpan<float3> r_combined_force) const override
|
||||
{
|
||||
IndexMask mask = IndexRange(attributes.size());
|
||||
ParticleFunctionEvaluator evaluator{particle_fn_, mask, attributes};
|
||||
evaluator.compute();
|
||||
fn::VSpan<float3> forces = evaluator.get<float3>(0, "Force");
|
||||
for (uint i : mask) {
|
||||
r_combined_force[i] += forces[i];
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
static Vector<const ParticleForce *> create_forces_for_particle_simulation(
|
||||
const nodes::DNode &simulation_node,
|
||||
nodes::MFNetworkTreeMap &network_map,
|
||||
ResourceCollector &resources,
|
||||
const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
|
||||
{
|
||||
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();
|
||||
if (origin_node.idname() != "SimulationNodeForce") {
|
||||
continue;
|
||||
}
|
||||
|
||||
const fn::MFInputSocket &force_socket = network_map.lookup_dummy(
|
||||
origin_node.input(0, "Force"));
|
||||
|
||||
const ParticleFunction *particle_fn = create_particle_function_for_inputs(
|
||||
{&force_socket}, resources, attribute_inputs);
|
||||
|
||||
if (particle_fn == nullptr) {
|
||||
continue;
|
||||
}
|
||||
|
||||
const ParticleForce &force = resources.construct<ParticleFunctionForce>(AT, *particle_fn);
|
||||
forces.append(&force);
|
||||
}
|
||||
return forces;
|
||||
}
|
||||
|
||||
static Map<std::string, Vector<const ParticleForce *>> collect_forces(
|
||||
nodes::MFNetworkTreeMap &network_map,
|
||||
ResourceCollector &resources,
|
||||
const Map<const fn::MFOutputSocket *, std::string> &attribute_inputs)
|
||||
{
|
||||
Map<std::string, Vector<const ParticleForce *>> forces_by_simulation;
|
||||
for (const nodes::DNode *dnode :
|
||||
network_map.tree().nodes_by_type("SimulationNodeParticleSimulation")) {
|
||||
std::string name = dnode_to_path(*dnode);
|
||||
Vector<const ParticleForce *> forces = create_forces_for_particle_simulation(
|
||||
*dnode, network_map, resources, attribute_inputs);
|
||||
forces_by_simulation.add_new(std::move(name), std::move(forces));
|
||||
}
|
||||
return forces_by_simulation;
|
||||
}
|
||||
|
||||
void update_simulation_in_depsgraph(Depsgraph *depsgraph,
|
||||
Scene *scene_cow,
|
||||
Simulation *simulation_cow)
|
||||
{
|
||||
int current_frame = scene_cow->r.cfra;
|
||||
if (simulation_cow->current_frame == current_frame) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Below we modify the original state/cache. Only the active depsgraph is allowed to do that. */
|
||||
if (!DEG_is_active(depsgraph)) {
|
||||
return;
|
||||
}
|
||||
|
||||
Simulation *simulation_orig = (Simulation *)DEG_get_original_id(&simulation_cow->id);
|
||||
|
||||
nodes::NodeTreeRefMap tree_refs;
|
||||
/* TODO: Use simulation_cow, but need to add depsgraph relations before that. */
|
||||
const nodes::DerivedNodeTree tree{simulation_orig->nodetree, tree_refs};
|
||||
fn::MFNetwork network;
|
||||
ResourceCollector resources;
|
||||
nodes::MFNetworkTreeMap network_map = insert_node_tree_into_mf_network(network, tree, resources);
|
||||
Map<const fn::MFOutputSocket *, std::string> attribute_inputs = deduplicate_attribute_nodes(
|
||||
network, network_map, tree);
|
||||
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);
|
||||
|
||||
Map<std::string, Vector<const ParticleForce *>> forces_by_simulation = collect_forces(
|
||||
network_map, resources, attribute_inputs);
|
||||
|
||||
if (current_frame == 1) {
|
||||
reinitialize_empty_simulation_states(simulation_orig, tree);
|
||||
|
||||
RNG *rng = BLI_rng_new(0);
|
||||
|
||||
simulation_orig->current_frame = 1;
|
||||
LISTBASE_FOREACH (ParticleSimulationState *, state, &simulation_orig->states) {
|
||||
state->tot_particles = 1000;
|
||||
CustomData_realloc(&state->attributes, state->tot_particles);
|
||||
ensure_attributes_exist(state);
|
||||
|
||||
CustomDataAttributesRef custom_data_attributes{state->attributes,
|
||||
(uint)state->tot_particles};
|
||||
|
||||
fn::MutableAttributesRef attributes = custom_data_attributes;
|
||||
MutableSpan<float3> positions = attributes.get<float3>("Position");
|
||||
MutableSpan<float3> velocities = attributes.get<float3>("Velocity");
|
||||
MutableSpan<int32_t> ids = attributes.get<int32_t>("ID");
|
||||
|
||||
for (uint i : positions.index_range()) {
|
||||
positions[i] = {i / 100.0f, 0, 0};
|
||||
velocities[i] = {0, BLI_rng_get_float(rng) - 0.5f, BLI_rng_get_float(rng) - 0.5f};
|
||||
ids[i] = i;
|
||||
}
|
||||
}
|
||||
|
||||
BLI_rng_free(rng);
|
||||
|
||||
copy_states_to_cow(simulation_orig, simulation_cow);
|
||||
}
|
||||
else if (current_frame == simulation_orig->current_frame + 1) {
|
||||
update_simulation_state_list(simulation_orig, tree);
|
||||
float time_step = 1.0f / 24.0f;
|
||||
simulation_orig->current_frame = current_frame;
|
||||
|
||||
LISTBASE_FOREACH (ParticleSimulationState *, state, &simulation_orig->states) {
|
||||
ensure_attributes_exist(state);
|
||||
|
||||
CustomDataAttributesRef custom_data_attributes{state->attributes,
|
||||
(uint)state->tot_particles};
|
||||
|
||||
fn::MutableAttributesRef attributes = custom_data_attributes;
|
||||
MutableSpan<float3> positions = attributes.get<float3>("Position");
|
||||
MutableSpan<float3> velocities = attributes.get<float3>("Velocity");
|
||||
|
||||
Array<float3> force_vectors{(uint)state->tot_particles, {0, 0, 0}};
|
||||
Span<const ParticleForce *> forces = forces_by_simulation.lookup_as(state->head.name);
|
||||
for (const ParticleForce *force : forces) {
|
||||
force->add_force(attributes, force_vectors);
|
||||
}
|
||||
|
||||
for (uint i : positions.index_range()) {
|
||||
velocities[i] += force_vectors[i] * time_step;
|
||||
positions[i] += velocities[i] * time_step;
|
||||
}
|
||||
}
|
||||
|
||||
copy_states_to_cow(simulation_orig, simulation_cow);
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace blender::sim
|
||||
Loading…
Reference in New Issue