Blender V4.5
Public Member Functions | Protected Attributes | List of all members
blender::fn::lazy_function::LazyFunction Class Referenceabstract

#include <FN_lazy_function.hh>

Inherited by blender::fn::lazy_function::GraphExecutor, blender::fn::lazy_function::tests::AddLazyFunction, blender::fn::lazy_function::tests::PartialEvaluationTestFunction, blender::fn::lazy_function::tests::StoreValueFunction, blender::nodes::LazyFunctionForBakeInputsUsage, blender::nodes::LazyFunctionForClosureZone, blender::nodes::LazyFunctionForEvaluateClosureNode, blender::nodes::LazyFunctionForExtractingReferenceSet, blender::nodes::LazyFunctionForForeachGeometryElementZone, blender::nodes::LazyFunctionForGeometryNode, blender::nodes::LazyFunctionForGizmoInputsUsage, blender::nodes::LazyFunctionForGizmoNode, blender::nodes::LazyFunctionForGroupNode, blender::nodes::LazyFunctionForImplicitConversion, blender::nodes::LazyFunctionForImplicitInput, blender::nodes::LazyFunctionForIndexSwitchSocketUsage, blender::nodes::LazyFunctionForJoinReferenceSets, blender::nodes::LazyFunctionForLogicalOr, blender::nodes::LazyFunctionForMultiFunctionNode, blender::nodes::LazyFunctionForMultiInput, blender::nodes::LazyFunctionForMutedNode, blender::nodes::LazyFunctionForReduceForeachGeometryElement, blender::nodes::LazyFunctionForRepeatZone, blender::nodes::LazyFunctionForRerouteNode, blender::nodes::LazyFunctionForSimulationInputsUsage, blender::nodes::LazyFunctionForSimulationZone, blender::nodes::LazyFunctionForSwitchSocketUsage, blender::nodes::LazyFunctionForUndefinedNode, blender::nodes::LazyFunctionForViewerInputUsage, blender::nodes::LazyFunctionForViewerNode, blender::nodes::node_geo_bake_cc::LazyFunctionForBakeNode, blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode, blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchNode, blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchSocketUsage, blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode, blender::nodes::node_geo_simulation_cc::sim_output_node::LazyFunctionForSimulationOutputNode, blender::nodes::node_geo_switch_cc::LazyFunctionForSwitchNode, and blender::nodes::node_geo_warning_cc::LazyFunctionForWarningNode.

Public Member Functions

virtual ~LazyFunction ()=default
 
virtual std::string name () const
 
virtual std::string input_name (int index) const
 
virtual std::string output_name (int index) const
 
virtual void * init_storage (LinearAllocator<> &allocator) const
 
virtual void destruct_storage (void *storage) const
 
virtual void possible_output_dependencies (int output_index, FunctionRef< void(Span< int >)> fn) const
 
bool always_used_inputs_available (const Params &params) const
 
bool allow_missing_requested_inputs () const
 
#LazyFunction Inline Methods
Span< Input > inputs () const
 
Span< Output > outputs () const
 
void execute (Params &params, const Context &context) const
 

Protected Attributes

const char * debug_name_ = "unknown"
 
Vector< Input > inputs_
 
Vector< Output > outputs_
 
bool allow_missing_requested_inputs_ = false
 

Detailed Description

A function that can compute outputs and request inputs lazily. For more details see the comment at the top of the file.

Definition at line 244 of file FN_lazy_function.hh.

Constructor & Destructor Documentation

◆ ~LazyFunction()

virtual blender::fn::lazy_function::LazyFunction::~LazyFunction ( )
virtualdefault

Member Function Documentation

◆ allow_missing_requested_inputs()

bool blender::fn::lazy_function::LazyFunction::allow_missing_requested_inputs ( ) const
inline

If true, the function can be executed even when some requested inputs are not available yet. This allows the function to make some progress and maybe to compute some outputs that are passed into this function again (lazy-function graphs may contain cycles as long as there aren't actually data dependencies).

Definition at line 311 of file FN_lazy_function.hh.

References allow_missing_requested_inputs_.

◆ always_used_inputs_available()

bool blender::fn::lazy_function::LazyFunction::always_used_inputs_available ( const Params & params) const

Utility to check that the guarantee by Input::usage is followed.

Definition at line 50 of file lazy_function.cc.

References allow_missing_requested_inputs_, inputs_, params, blender::fn::lazy_function::Input::usage, and blender::fn::lazy_function::Used.

Referenced by execute().

◆ destruct_storage()

void blender::fn::lazy_function::LazyFunction::destruct_storage ( void * storage) const
virtual

Destruct the storage created in init_storage.

Reimplemented in blender::fn::lazy_function::GraphExecutor, blender::nodes::LazyFunctionForEvaluateClosureNode, blender::nodes::LazyFunctionForForeachGeometryElementZone, blender::nodes::LazyFunctionForGroupNode, blender::nodes::LazyFunctionForRepeatZone, and blender::nodes::LazyFunctionForSimulationZone.

Definition at line 33 of file lazy_function.cc.

References BLI_assert, and UNUSED_VARS_NDEBUG.

Referenced by blender::nodes::LazyFunctionForGroupNode::destruct_storage(), blender::nodes::LazyFunctionForSimulationZone::destruct_storage(), blender::nodes::evaluate_closure_eagerly(), blender::nodes::execute_geometry_nodes_on_geometry(), and blender::fn::lazy_function::detail::execute_lazy_function_eagerly_impl().

◆ execute()

void blender::fn::lazy_function::LazyFunction::execute ( Params & params,
const Context & context ) const
inline

During execution the function retrieves inputs and sets outputs in params. For some functions, this method is called more than once. After execution, the function either has computed all required outputs or is waiting for more inputs.

Definition at line 338 of file FN_lazy_function.hh.

References always_used_inputs_available(), BLI_assert, and params.

Referenced by blender::nodes::evaluate_closure_eagerly(), blender::nodes::execute_geometry_nodes_on_geometry(), blender::nodes::LazyFunctionForGroupNode::execute_impl(), blender::nodes::LazyFunctionForSimulationZone::execute_impl(), blender::fn::lazy_function::detail::execute_lazy_function_eagerly_impl(), blender::nodes::ForeachGeometryElementNodeExecuteWrapper::execute_node(), and blender::nodes::RepeatBodyNodeExecuteWrapper::execute_node().

◆ init_storage()

void * blender::fn::lazy_function::LazyFunction::init_storage ( LinearAllocator<> & allocator) const
virtual

Allocates storage for this function. The storage will be passed to every call to execute. If the function does not keep track of any state, this does not have to be implemented.

Reimplemented in blender::fn::lazy_function::GraphExecutor, blender::nodes::LazyFunctionForEvaluateClosureNode, blender::nodes::LazyFunctionForForeachGeometryElementZone, blender::nodes::LazyFunctionForGroupNode, blender::nodes::LazyFunctionForRepeatZone, and blender::nodes::LazyFunctionForSimulationZone.

Definition at line 28 of file lazy_function.cc.

Referenced by blender::nodes::evaluate_closure_eagerly(), blender::nodes::execute_geometry_nodes_on_geometry(), blender::fn::lazy_function::detail::execute_lazy_function_eagerly_impl(), blender::nodes::LazyFunctionForGroupNode::init_storage(), and blender::nodes::LazyFunctionForSimulationZone::init_storage().

◆ input_name()

std::string blender::fn::lazy_function::LazyFunction::input_name ( int index) const
virtual

Reimplemented in blender::fn::lazy_function::GraphExecutor, blender::nodes::LazyFunctionForForeachGeometryElementZone, blender::nodes::LazyFunctionForGeometryNode, blender::nodes::LazyFunctionForGroupNode, blender::nodes::LazyFunctionForRepeatZone, and blender::nodes::LazyFunctionForSimulationZone.

Definition at line 18 of file lazy_function.cc.

References inputs_.

Referenced by blender::nodes::LazyFunctionForGroupNode::input_name(), blender::nodes::LazyFunctionForSimulationZone::input_name(), and blender::fn::lazy_function::Socket::name().

◆ inputs()

Span< Input > blender::fn::lazy_function::LazyFunction::inputs ( ) const
inline

Inputs of the function.

Definition at line 328 of file FN_lazy_function.hh.

References inputs_.

Referenced by blender::fn::lazy_function::Graph::add_function(), blender::nodes::evaluate_closure_eagerly(), blender::nodes::execute_geometry_nodes_on_geometry(), blender::fn::lazy_function::execute_lazy_function_eagerly(), blender::nodes::LazyFunctionForGroupNode::LazyFunctionForGroupNode(), blender::nodes::LazyFunctionForSimulationZone::LazyFunctionForSimulationZone(), blender::fn::lazy_function::Params::set_input_unused(), blender::fn::lazy_function::Params::try_get_input_data_ptr(), and blender::fn::lazy_function::Params::try_get_input_data_ptr_or_request().

◆ name()

std::string blender::fn::lazy_function::LazyFunction::name ( ) const
virtual

Get a name of the function or an input or output. This is mainly used for debugging. These are virtual functions because the names are often not used outside of debugging workflows. This way the names are only generated when they are actually needed.

Reimplemented in blender::nodes::LazyFunctionForGroupNode.

Definition at line 13 of file lazy_function.cc.

References debug_name_.

Referenced by blender::nodes::LazyFunctionForReduceForeachGeometryElement::handle_generation_items_group(), and blender::fn::lazy_function::Node::name().

◆ output_name()

std::string blender::fn::lazy_function::LazyFunction::output_name ( int index) const
virtual

Reimplemented in blender::fn::lazy_function::GraphExecutor, blender::nodes::LazyFunctionForForeachGeometryElementZone, blender::nodes::LazyFunctionForGeometryNode, blender::nodes::LazyFunctionForGroupNode, blender::nodes::LazyFunctionForRepeatZone, and blender::nodes::LazyFunctionForSimulationZone.

Definition at line 23 of file lazy_function.cc.

References outputs_.

Referenced by blender::fn::lazy_function::Socket::name(), blender::nodes::LazyFunctionForGroupNode::output_name(), and blender::nodes::LazyFunctionForSimulationZone::output_name().

◆ outputs()

Span< Output > blender::fn::lazy_function::LazyFunction::outputs ( ) const
inline

Outputs of the function.

Definition at line 333 of file FN_lazy_function.hh.

References outputs_.

Referenced by blender::fn::lazy_function::Graph::add_function(), blender::nodes::evaluate_closure_eagerly(), blender::nodes::execute_geometry_nodes_on_geometry(), blender::fn::lazy_function::execute_lazy_function_eagerly(), blender::fn::lazy_function::Params::get_output_data_ptr(), blender::fn::lazy_function::Params::get_output_usage(), blender::nodes::LazyFunctionForGroupNode::LazyFunctionForGroupNode(), blender::nodes::LazyFunctionForSimulationZone::LazyFunctionForSimulationZone(), blender::fn::lazy_function::Params::output_set(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::output_simulation_state_copy(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::output_simulation_state_move(), and blender::fn::lazy_function::Params::output_was_set().

◆ possible_output_dependencies()

void blender::fn::lazy_function::LazyFunction::possible_output_dependencies ( int output_index,
FunctionRef< void(Span< int >)> fn ) const
virtual

Calls fn with the input indices that the given output_index may depend on. By default every output depends on every input.

Reimplemented in blender::fn::lazy_function::tests::PartialEvaluationTestFunction.

Definition at line 39 of file lazy_function.cc.

References indices, and inputs_.

Member Data Documentation

◆ allow_missing_requested_inputs_

bool blender::fn::lazy_function::LazyFunction::allow_missing_requested_inputs_ = false
protected

Allow executing the function even if previously requested values are not yet available.

Definition at line 252 of file FN_lazy_function.hh.

Referenced by allow_missing_requested_inputs(), always_used_inputs_available(), blender::fn::lazy_function::GraphExecutor::GraphExecutor(), and blender::fn::lazy_function::tests::PartialEvaluationTestFunction::PartialEvaluationTestFunction().

◆ debug_name_

const char* blender::fn::lazy_function::LazyFunction::debug_name_ = "unknown"
protected

Definition at line 246 of file FN_lazy_function.hh.

Referenced by blender::fn::lazy_function::tests::AddLazyFunction::AddLazyFunction(), blender::fn::lazy_function::GraphExecutor::GraphExecutor(), blender::nodes::node_geo_bake_cc::LazyFunctionForBakeNode::LazyFunctionForBakeNode(), blender::nodes::LazyFunctionForClosureZone::LazyFunctionForClosureZone(), blender::nodes::LazyFunctionForEvaluateClosureNode::LazyFunctionForEvaluateClosureNode(), blender::nodes::LazyFunctionForForeachGeometryElementZone::LazyFunctionForForeachGeometryElementZone(), blender::nodes::LazyFunctionForGeometryNode::LazyFunctionForGeometryNode(), blender::nodes::LazyFunctionForImplicitConversion::LazyFunctionForImplicitConversion(), blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode::LazyFunctionForIndexSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchNode::LazyFunctionForMenuSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchSocketUsage::LazyFunctionForMenuSwitchSocketUsage(), blender::nodes::LazyFunctionForMultiFunctionNode::LazyFunctionForMultiFunctionNode(), blender::nodes::LazyFunctionForMultiInput::LazyFunctionForMultiInput(), blender::nodes::LazyFunctionForMutedNode::LazyFunctionForMutedNode(), blender::nodes::LazyFunctionForReduceForeachGeometryElement::LazyFunctionForReduceForeachGeometryElement(), blender::nodes::LazyFunctionForRepeatZone::LazyFunctionForRepeatZone(), blender::nodes::LazyFunctionForRerouteNode::LazyFunctionForRerouteNode(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::LazyFunctionForSimulationInputNode(), blender::nodes::node_geo_simulation_cc::sim_output_node::LazyFunctionForSimulationOutputNode::LazyFunctionForSimulationOutputNode(), blender::nodes::node_geo_switch_cc::LazyFunctionForSwitchNode::LazyFunctionForSwitchNode(), blender::nodes::LazyFunctionForUndefinedNode::LazyFunctionForUndefinedNode(), blender::nodes::node_geo_warning_cc::LazyFunctionForWarningNode::LazyFunctionForWarningNode(), name(), blender::fn::lazy_function::tests::PartialEvaluationTestFunction::PartialEvaluationTestFunction(), and blender::fn::lazy_function::tests::StoreValueFunction::StoreValueFunction().

◆ inputs_

Vector<Input> blender::fn::lazy_function::LazyFunction::inputs_
protected

Definition at line 247 of file FN_lazy_function.hh.

Referenced by blender::fn::lazy_function::Graph::add_function(), blender::fn::lazy_function::tests::AddLazyFunction::AddLazyFunction(), always_used_inputs_available(), blender::nodes::LazyFunctionForGeometryNode::execute_impl(), blender::nodes::LazyFunctionForMultiFunctionNode::execute_impl(), blender::nodes::LazyFunctionForMultiInput::execute_impl(), blender::nodes::LazyFunctionForRerouteNode::execute_impl(), blender::fn::lazy_function::GraphExecutor::GraphExecutor(), input_name(), blender::nodes::LazyFunctionForGeometryNode::input_name(), inputs(), blender::nodes::node_geo_bake_cc::LazyFunctionForBakeNode::LazyFunctionForBakeNode(), blender::nodes::LazyFunctionForClosureZone::LazyFunctionForClosureZone(), blender::nodes::LazyFunctionForEvaluateClosureNode::LazyFunctionForEvaluateClosureNode(), blender::nodes::LazyFunctionForForeachGeometryElementZone::LazyFunctionForForeachGeometryElementZone(), blender::nodes::LazyFunctionForGeometryNode::LazyFunctionForGeometryNode(), blender::nodes::LazyFunctionForImplicitConversion::LazyFunctionForImplicitConversion(), blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode::LazyFunctionForIndexSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchNode::LazyFunctionForMenuSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchSocketUsage::LazyFunctionForMenuSwitchSocketUsage(), blender::nodes::LazyFunctionForMultiFunctionNode::LazyFunctionForMultiFunctionNode(), blender::nodes::LazyFunctionForMultiInput::LazyFunctionForMultiInput(), blender::nodes::LazyFunctionForMutedNode::LazyFunctionForMutedNode(), blender::nodes::LazyFunctionForReduceForeachGeometryElement::LazyFunctionForReduceForeachGeometryElement(), blender::nodes::LazyFunctionForRepeatZone::LazyFunctionForRepeatZone(), blender::nodes::LazyFunctionForRerouteNode::LazyFunctionForRerouteNode(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::LazyFunctionForSimulationInputNode(), blender::nodes::node_geo_simulation_cc::sim_output_node::LazyFunctionForSimulationOutputNode::LazyFunctionForSimulationOutputNode(), blender::nodes::node_geo_switch_cc::LazyFunctionForSwitchNode::LazyFunctionForSwitchNode(), blender::nodes::node_geo_warning_cc::LazyFunctionForWarningNode::LazyFunctionForWarningNode(), blender::fn::lazy_function::tests::PartialEvaluationTestFunction::PartialEvaluationTestFunction(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::pass_through(), possible_output_dependencies(), blender::fn::lazy_function::tests::StoreValueFunction::StoreValueFunction(), and blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode::values_num().

◆ outputs_

Vector<Output> blender::fn::lazy_function::LazyFunction::outputs_
protected

Definition at line 248 of file FN_lazy_function.hh.

Referenced by blender::fn::lazy_function::tests::AddLazyFunction::AddLazyFunction(), blender::nodes::LazyFunctionForMultiFunctionNode::execute_impl(), blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode::execute_single(), blender::nodes::node_geo_switch_cc::LazyFunctionForSwitchNode::execute_single(), blender::fn::lazy_function::GraphExecutor::GraphExecutor(), blender::nodes::node_geo_bake_cc::LazyFunctionForBakeNode::LazyFunctionForBakeNode(), blender::nodes::LazyFunctionForClosureZone::LazyFunctionForClosureZone(), blender::nodes::LazyFunctionForEvaluateClosureNode::LazyFunctionForEvaluateClosureNode(), blender::nodes::LazyFunctionForForeachGeometryElementZone::LazyFunctionForForeachGeometryElementZone(), blender::nodes::LazyFunctionForGeometryNode::LazyFunctionForGeometryNode(), blender::nodes::LazyFunctionForImplicitConversion::LazyFunctionForImplicitConversion(), blender::nodes::node_geo_index_switch_cc::LazyFunctionForIndexSwitchNode::LazyFunctionForIndexSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchNode::LazyFunctionForMenuSwitchNode(), blender::nodes::node_geo_menu_switch_cc::LazyFunctionForMenuSwitchSocketUsage::LazyFunctionForMenuSwitchSocketUsage(), blender::nodes::LazyFunctionForMultiFunctionNode::LazyFunctionForMultiFunctionNode(), blender::nodes::LazyFunctionForMultiInput::LazyFunctionForMultiInput(), blender::nodes::LazyFunctionForMutedNode::LazyFunctionForMutedNode(), blender::nodes::LazyFunctionForReduceForeachGeometryElement::LazyFunctionForReduceForeachGeometryElement(), blender::nodes::LazyFunctionForRepeatZone::LazyFunctionForRepeatZone(), blender::nodes::LazyFunctionForRerouteNode::LazyFunctionForRerouteNode(), blender::nodes::node_geo_simulation_cc::sim_input_node::LazyFunctionForSimulationInputNode::LazyFunctionForSimulationInputNode(), blender::nodes::node_geo_simulation_cc::sim_output_node::LazyFunctionForSimulationOutputNode::LazyFunctionForSimulationOutputNode(), blender::nodes::node_geo_switch_cc::LazyFunctionForSwitchNode::LazyFunctionForSwitchNode(), blender::nodes::LazyFunctionForUndefinedNode::LazyFunctionForUndefinedNode(), blender::nodes::node_geo_warning_cc::LazyFunctionForWarningNode::LazyFunctionForWarningNode(), output_name(), blender::nodes::LazyFunctionForGeometryNode::output_name(), outputs(), and blender::fn::lazy_function::tests::PartialEvaluationTestFunction::PartialEvaluationTestFunction().

The documentation for this class was generated from the following files:
Generated on Fri Apr 3 2026 06:33:18 for Blender by  doxygen 1.11.0