Class LayerDescription

• Defined in File LayerDescription.h

Inheritance Relationships

Base Type

• public flamegpu::CLayerDescription (Class CLayerDescription)

Class Documentation

class LayerDescription : public flamegpu::CLayerDescription

Within the model hierarchy, this class represents an execution layer for a FLAMEGPU model This class is used to configure which agent and host functions execute at a stage of the model’s execution

See also

ModelDescription::newLayer(const std::string&) For creating instances of this class

Public Functions

explicit LayerDescription(std::shared_ptr<LayerData> data)

Constructor, creates an interface to the LayerData Constructors

Parameters

data – Data store of this environment’s data

LayerDescription(const LayerDescription &other_layer) = default

Copy constructor Creates a new interface to the same LayerData/ModelData

LayerDescription(LayerDescription &&other_layer) = default

LayerDescription &operator=(const LayerDescription &other_layer) = default

Assignment operator Assigns this interface to the same LayerData/ModelData

LayerDescription &operator=(LayerDescription &&other_layer) = default

template<typename AgentFn>
void addAgentFunction(AgentFn a = AgentFn())

Adds an agent function to this layer The agent function will be called during this stage of model execution

See also

AgentDescription::newFunction(const std::string &, AgentFunction)

Note

The agent function must first be added to an Agent

Parameters

a – Agent function as defined using FLAMEGPU_AGENT_FUNCTION notation

Template Parameters

AgentFn – Struct containing agent function definition

Throws

• exception::InvalidAgentFunc – If the agent function does not exist within the model hierarchy

• exception::InvalidAgentFunc – If the agent function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

• exception::InvalidLayerMember – If the agent function outputs to a message list output to by an existing agent function of the layer

void addAgentFunction(const CAgentFunctionDescription &afd)

Adds an agent function to this layer The agent function will be called during this stage of model execution

Parameters

afd – Agent function description to execute during this layer

Throws

• exception::InvalidAgentFunc – If the agent function does not exist within the model hierarchy

• exception::InvalidAgentFunc – If the agent function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

• exception::InvalidLayerMember – If the agent function outputs to a message list output to by an existing agent function of the layer

• exception::InvalidLayerMember – If the agent function outputs an agent in the same agent state as an existing agent function’s input state (or vice versa)

void addAgentFunction(const AgentFunctionDescription &afd)

Adds an agent function to this layer The agent function will be called during this stage of model execution

Accessors

Note

This additional version is required, to stop the template form of this method being used

Parameters

afd – Agent function description to execute during this layer

Throws

• exception::InvalidAgentFunc – If the agent function does not exist within the model hierarchy

• exception::InvalidAgentFunc – If the agent function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

• exception::InvalidLayerMember – If the agent function outputs to a message list output to by an existing agent function of the layer

• exception::InvalidLayerMember – If the agent function outputs an agent in the same agent state as an existing agent function’s input state (or vice versa)

void addAgentFunction(const std::string &agentName, const std::string &functionName)

Adds an agent function to this layer The agent function will be called during this stage of model execution

Parameters

• agentName – Name of the agent which owns the function to execute during this layer

• functionName – Name of the agent function description to execute during this layer

Throws

• exception::InvalidAgentFunc – If the agent function does not exist within the model hierarchy

• exception::InvalidAgentFunc – If the agent function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

• exception::InvalidLayerMember – If the agent function outputs to a message list output to by an existing agent function of the layer

• exception::InvalidLayerMember – If the agent function outputs an agent in the same agent state as an existing agent function’s input state (or vice versa)

void addAgentFunction(const char *agentName, const char *functionName)

Adds an agent function to this layer The agent function will be called during this stage of model execution

Note

This version exists because the template overload was preventing implicit cast to std::string

Parameters

• agentName – Name of the agent which owns the function to execute during this layer

• functionName – Name of the agent function description to execute during this layer

Throws

• exception::InvalidAgentFunc – If the agent function does not exist within the model hierarchy

• exception::InvalidAgentFunc – If the agent function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

• exception::InvalidLayerMember – If the agent function outputs to a message list output to by an existing agent function of the layer

• exception::InvalidLayerMember – If the agent function outputs an agent in the same agent state as an existing agent function’s input state (or vice versa)

void addHostFunction(FLAMEGPU_HOST_FUNCTION_POINTER func_p)

Adds a host function to this layer The host function will be called during this stage of model execution

Note

There is no guarantee on the order in which multiple host functions in the same layer will be executed

Parameters

func_p – Function pointer to the host function declared using FLAMEGPU_HOST_FUNCTION notation

Throws

• exception::InvalidHostFunc – If the function has already been added to the layer

• exception::InvalidLayerMember – If the layer already contains a SubModel

void addSubModel(const std::string &name)

Adds a submodel to a layer If layer contains a submodel, it may contain nothing else

See also

addSubModel(const CSubModelDescription &)

Parameters

name – Name of the submodel (passed to ModelDescription::newSubModel() was called)

Throws

• exception::InvalidLayerMember – If the layer already contains any agent functions or host functions

• exception::InvalidSubModel – If the layer already contains a submodel

void addSubModel(const CSubModelDescription &submodel)

Adds a submodel to a layer If layer contains a submodel, it may contain nothing else

See also

addSubModel(const std::string &)

Parameters

submodel – SubModel description of the layer to be bound

Throws

• exception::InvalidLayerMember – If the layer already contains any agent functions or host functions

• exception::InvalidSubModel – If the layer already contains a submodel

void _addHostFunctionCallback(HostFunctionCallback *func_callback)

Adds a host function to this layer, similar to addHostFunction however the runnable function is encapsulated within an object which permits cross language support in swig. The host function will be called during this stage of model execution

Note

ONLY USED INTERNALLY AND BY PYTHON API - DO NOT CALL IN C++ BUILD

Parameters

func_callback – a Host function callback object

Throws

exception::InvalidHostFunc – If the function has already been added to the layer

AgentFunctionDescription AgentFunction(unsigned int index)

See also

LayerDescription::getAgentFunctionsCount()

Note

Functions are stored in a set, so order may change as new functions are added

Parameters

index – Index of the function to return

Throws

exception::OutOfBoundsException – When index exceeds number of agent functions in the layer

Returns

A mutable reference to the agent function at the provided index