Class MessageSpatial2D

Nested Relationships

Nested Types

Class Documentation

class MessageSpatial2D

2D Continuous spatial messaging functionality

User specifies the environment bounds and search radius When accessing messages, a search origin is specified A subset of messages, including those within radius of the search origin are returned The user must distance check that they fall within the search radius manually Unlike FLAMEGPU1, these spatial messages do not wrap over environment bounds.

class CDescription : public flamegpu::MessageBruteForce::CDescription

Subclassed by flamegpu::MessageSpatial2D::Description, flamegpu::MessageSpatial3D::CDescription

Public Functions

explicit CDescription(std::shared_ptr<Data> data)

CDescription

Constructor, creates an interface to the MessageData

Parameters:

data – Data store of this message’s data

explicit CDescription(std::shared_ptr<const Data> data)
CDescription(const CDescription &other_agent) = default

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

CDescription(CDescription &&other_agent) = default
CDescription &operator=(const CDescription &other_agent) = default

Assignment operator Assigns this interface to the same MessageData/ModelData

CDescription &operator=(CDescription &&other_agent) = default
bool operator==(const CDescription &rhs) const

Equality operator, checks whether message Description hierarchies are functionally the same

Note

Instead compare pointers if you wish to check that they are the same instance

Parameters:

rhs – right hand side

Returns:

True when messages are the same

bool operator!=(const CDescription &rhs) const

Equality operator, checks whether message Description hierarchies are functionally different

Note

Instead compare pointers if you wish to check that they are not the same instance

Parameters:

rhs – right hand side

Returns:

True when messages are not the same

float getRadius() const

Const accessors

float getMinX() const
float getMinY() const
float getMaxX() const
float getMaxY() const

Protected Functions

void setRadius(float r)

Accessors

void setMinX(float x)
void setMinY(float y)
void setMin(float x, float y)
void setMaxX(float x)
void setMaxY(float y)
void setMax(float x, float y)
class CUDAModelHandler : public flamegpu::MessageSpecialisationHandler

CUDA host side handler of spatial messages Allocates memory for and constructs PBM

Public Functions

explicit CUDAModelHandler(detail::CUDAMessage &a)

Constructor

Initialises metadata, decides PBM size etc

Parameters:

a – Parent CUDAMessage, used to access message settings, data ptrs etc

~CUDAModelHandler() override

Destructor Frees all alocated memory

virtual void init(detail::CUDAScatter &scatter, unsigned int streamId, cudaStream_t stream) override

Allocates memory for the constructed index. Sets data asthough message list is empty

Parameters:

  • scatter – Scatter instance and scan arrays to be used (CUDASimulation::singletons->scatter)

  • streamId – Index of stream specific structures used

  • stream – The CUDAStream to use for CUDA operations

virtual void buildIndex(detail::CUDAScatter &scatter, unsigned int streamId, cudaStream_t stream) override

Reconstructs the partition boundary matrix This should be called before reading newly output messages

Parameters:

  • scatter – Scatter instance and scan arrays to be used (CUDASimulation::singletons->scatter)

  • streamId – The stream index to use for accessing stream specific resources such as scan compaction arrays and buffers

  • stream – The CUDAStream to use for CUDA operations

virtual void allocateMetaDataDevicePtr(cudaStream_t stream) override

Allocates memory for the constructed index. The memory allocation is checked by build index.

virtual void freeMetaDataDevicePtr() override

Releases memory for the constructed index.

inline virtual const void *getMetaDataDevicePtr() const override

Returns a pointer to the metadata struct, this is required for reading the message data

struct Data : public flamegpu::MessageBruteForce::Data

Internal data representation of Spatial2D messages within model description hierarchy

See also

Description

Subclassed by flamegpu::MessageSpatial3D::Data

Public Functions

virtual ~Data() = default
virtual std::unique_ptr<MessageSpecialisationHandler> getSpecialisationHander(detail::CUDAMessage &owner) const override
virtual std::type_index getType() const override

Used internally to validate that the corresponding Message type is attached via the agent function shim.

Returns:

The std::type_index of the Message type which must be used.

virtual flamegpu::MessageSortingType getSortingType() const override

Return the sorting type for this message type

Public Members

float radius
float minX
float minY
float maxX
float maxY

Protected Functions

virtual Data *clone(const std::shared_ptr<const ModelData> &newParent) override
Data(std::shared_ptr<const ModelData> model, const Data &other)

Copy constructor This is unsafe, should only be used internally, use clone() instead

Data(std::shared_ptr<const ModelData> model, const std::string &message_name)

Data

Normal constructor, only to be called by ModelDescription

Friends

friend class ModelDescription
friend struct ModelData
class Description : public flamegpu::MessageSpatial2D::CDescription

User accessible interface to Spatial2D messages within mode description hierarchy

See also

Data

Public Functions

explicit Description(std::shared_ptr<Data> data)

Description

Constructor, creates an interface to the MessageData

Parameters:

data – Data store of this agent’s data

Description(const Description &other_message) = default

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

Description(Description &&other_message) = default
Description &operator=(const Description &other_message) = default

Assignment operator Assigns this interface to the same MessageData/ModelData

Description &operator=(Description &&other_message) = default
struct GridPos2D

Basic class to group 3 dimensional bin coordinates Would use glm::ivec3, but project does not currently have glm

Public Members

int x
int y
class In

This class is accessible via DeviceAPI.message_in if MessageSpatial3D is specified in FLAMEGPU_AGENT_FUNCTION It gives access to functionality for reading spatially partitioned messages

Public Functions

__device__ inline In(const void *_metadata)

Constructor Initialises member variables

Parameters:

_metadata – Reinterpreted as type MessageSpatial3D::MetaData

__device__ inline Filter operator()(const float x, const float y) const

Returns a Filter object which provides access to message iterator for iterating a subset of messages including those within the radius of the search origin

Note

This iterator may return messages outside of the search radius, so distance checking should be performed by the user

Parameters:

  • x – Search origin x coord

  • y – Search origin y coord

__device__ inline WrapFilter wrap(const float x, const float y) const

Returns a WrapFilter object which provides access to message iterator for iterating a subset of messages including those within the radius of the search origin

Note

Unlike the regular iterator, this iterator will not return messages outside of the search radius. The wrapped distance can be returned via WrapFilter::Message::distance()

Parameters:

  • x – Search origin x coord

  • y – Search origin y coord

__forceinline__ __device__ inline float radius() const

Returns the search radius of the message list defined in the model description

class Filter

This class is created when a search origin is provided to MessageSpatial2D::In::operator()(float, float) It provides iterator access to a subset of the full message list, according to the provided search origin

See also

MessageSpatial2D::In::operator()(float, float)

Public Functions

__device__ inline Filter(const MetaData *_metadata, float x, float y)

Constructor, takes the search parameters requried

Parameters:

  • _metadata – Pointer to message list metadata

  • x – Search origin x coord

  • y – Search origin y coord

__device__ inline iterator begin(void) const

Returns an iterator to the start of the message list subset about the search origin

__device__ inline iterator end(void) const

Returns an iterator to the position beyond the end of the message list subset

Note

This iterator is the same for all message list subsets

class iterator

Stock iterator for iterating MessageSpatial3D::In::Filter::Message objects

Public Functions

__device__ inline iterator(const Filter &parent, const int relative_cell_y, const int _cell_index_max, const int _cell_index)

Constructor This iterator is constructed by MessageSpatial2D::In::Filter::begin()(float, float)

See also

MessageSpatial2D::In::Operator()(float, float)

__device__ inline iterator(const Filter &parent)

False constructor Only used by Filter::end(), creates a null objct

__device__ inline iterator &operator++()

Moves to the next message (Prefix increment operator)

__device__ inline iterator operator++(int)

Moves to the next message (Postfix increment operator, returns value prior to increment)

__device__ inline bool operator==(const iterator &rhs) const

Equality operator Compares message

__device__ inline bool operator!=(const iterator &rhs) const

Inequality operator Compares message

__device__ inline Message &operator*()

Dereferences the iterator to return the message object, for accessing variables

__device__ inline Message *operator->()

Dereferences the iterator to return the message object, for accessing variables

class Message

Provides access to a specific message Returned by the iterator

See also

In::Filter::iterator

Public Functions

__device__ inline Message(const Filter &parent, const int relative_cell_y, const int _cell_index_max, const int _cell_index)

Constructs a message and directly initialises all of it’s member variables

Note

See member variable documentation for their purposes

__device__ inline Message(const Filter &parent)

False minimal constructor used by iterator::end()

__device__ inline bool operator==(const Message &rhs) const

Equality operator Compares all internal member vars for equality

Note

Does not compare _parent

__device__ inline bool operator!=(const Message &rhs) const

This should only be called to compare against end() It has been modified to check for end of iteration with minimal instructions Therefore it does not even perform the equality operation

Note

Use operator==() if proper equality is required

__device__ inline Message &operator++()

Updates the message to return variables from the next message in the message list

Returns:

Returns itself

template<typename T, unsigned int N>
__device__ T getVariable(const char (&variable_name)[N]) const

Returns the value for the current message attached to the named variable

Parameters:

variable_name – Name of the variable

Template Parameters:

  • T – type of the variable

  • N – Length of variable name (this should be implicit if a string literal is passed to variable name)

Returns:

The specified variable, else 0x0 if an error occurs

template<typename T, flamegpu::size_type N, unsigned int M>
__device__ T getVariable(const char (&variable_name)[M], unsigned int index) const

Returns the specified variable array element from the current message attached to the named variable

Parameters:

  • variable_name – name used for accessing the variable, this value should be a string literal e.g. “foobar”

  • index – Index of the element within the variable array to return

Template Parameters:

  • T – Type of the message variable being accessed

  • N – The length of the array variable, as set within the model description hierarchy

  • M – Length of variable_name, this should always be implicit if passing a string literal

Throws:

  • exception::DeviceError – If name is not a valid variable within the agent (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

  • exception::DeviceError – If T is not the type of variable ‘name’ within the message (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

  • exception::DeviceError – If index is out of bounds for the variable array specified by name (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

class WrapFilter

This class is created when a search origin is provided to MessageSpatial2D::In::wrap()(float, float) It provides iterator access to a subset of the full message list, according to the provided search origin

See also

MessageSpatial2D::In::wrap()(float, float)

Public Functions

__device__ inline WrapFilter(const MetaData *_metadata, float x, float y)

Constructor, takes the search parameters requried

Parameters:

  • _metadata – Pointer to message list metadata

  • x – Search origin x coord

  • y – Search origin y coord

__device__ inline iterator begin(void) const

Returns an iterator to the start of the message list subset about the search origin

__device__ inline iterator end(void) const

Returns an iterator to the position beyond the end of the message list subset

Note

This iterator is the same for all message list subsets

class iterator

Stock iterator for iterating MessageSpatial3D::In::Filter::Message objects

Public Functions

__device__ inline iterator(const WrapFilter &parent, const int relative_cell_x, const int relative_cell_y, const int _cell_index_max, const int _cell_index)

Constructor This iterator is constructed by MessageSpatial2D::In::WrapFilter::begin()(float, float)

See also

MessageSpatial2D::In::wrap()(float, float)

__device__ inline iterator(const WrapFilter &parent)

False constructor Only used by WrapFilter::end(), creates a null object

__device__ inline iterator &operator++()

Moves to the next message (Prefix increment operator)

__device__ inline iterator operator++(int)

Moves to the next message (Postfix increment operator, returns value prior to increment)

__device__ inline bool operator==(const iterator &rhs) const

Equality operator Compares message

__device__ inline bool operator!=(const iterator &rhs) const

Inequality operator Compares message

__device__ inline Message &operator*()

Dereferences the iterator to return the message object, for accessing variables

__device__ inline Message *operator->()

Dereferences the iterator to return the message object, for accessing variables

class Message

Provides access to a specific message Returned by the iterator

See also

In::WrapFilter::iterator

Public Functions

__device__ inline Message(const WrapFilter &parent, const int relative_cell_x, const int relative_cell_y, const int _cell_index_max, const int _cell_index)

Constructs a message and directly initialises all of it’s member variables

Note

See member variable documentation for their purposes

__device__ inline Message(const WrapFilter &parent)

False minimal constructor used by iterator::end()

__device__ inline bool operator==(const Message &rhs) const

Equality operator Compares all internal member vars for equality

Note

Does not compare _parent

__device__ inline bool operator!=(const Message &rhs) const

This should only be called to compare against end() It has been modified to check for end of iteration with minimal instructions Therefore it does not even perform the equality operation

Note

Use operator==() if proper equality is required

__device__ inline Message &operator++()

Updates the message to return variables from the next message in the message list

Returns:

Returns itself

template<typename T, unsigned int N>
__device__ T getVariable(const char (&variable_name)[N]) const

Returns the value for the current message attached to the named variable

Parameters:

variable_name – Name of the variable

Template Parameters:

  • T – type of the variable

  • N – Length of variable name (this should be implicit if a string literal is passed to variable name)

Returns:

The specified variable, else 0x0 if an error occurs

template<typename T, flamegpu::size_type N, unsigned int M>
__device__ T getVariable(const char (&variable_name)[M], unsigned int index) const

Returns the specified variable array element from the current message attached to the named variable

Parameters:

  • variable_name – name used for accessing the variable, this value should be a string literal e.g. “foobar”

  • index – Index of the element within the variable array to return

Template Parameters:

  • T – Type of the message variable being accessed

  • N – The length of the array variable, as set within the model description hierarchy

  • M – Length of variable_name, this should always be implicit if passing a string literal

Throws:

  • exception::DeviceError – If name is not a valid variable within the agent (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

  • exception::DeviceError – If T is not the type of variable ‘name’ within the message (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

  • exception::DeviceError – If index is out of bounds for the variable array specified by name (flamegpu must be built with FLAMEGPU_SEATBELTS enabled for device error checking)

__device__ inline float getVirtualX() const

Returns the virtual x variable of the message, relative to the search origin This is the closest x coordinate the message would have, relative to the observer’s x coordinate in a wrapped environment

__device__ inline float getVirtualY() const

Returns the virtual y variable of the message, relative to the search origin This is the closest y coordinate the message would have, relative to the observer’s y coordinate in a wrapped environment

__device__ inline float getVirtualX(const float x1) const

Returns the virtual x variable of the message This is the closest x coordinate the message would have, relative to the observer’s x coordinate in a wrapped environment

Parameters:

x1 – The x coordinate of the observer

__device__ inline float getVirtualY(const float y1) const

Returns the virtual y variable of the message This is the closest y coordinate the message would have, relative to the observer’s y coordinate in a wrapped environment

Parameters:

y1 – The y coordinate of the observer

struct MetaData

MetaData required by spatial partitioning during message reads

Public Members

float min[2]

Minimum environment bounds

float max[2]

Maximum environment bounds

float radius

Search radius (also used as subdividision bin width)

unsigned int *PBM

Pointer to the partition boundary matrix in device memory The PBM is never stored on the host

unsigned int gridDim[2]

The number of subdividision bins in each dimensions

float environmentWidth[2]

max-lowerBound

class Out : public flamegpu::MessageBruteForce::Out

This class is accessible via DeviceAPI.message_out if MessageSpatial3D is specified in FLAMEGPU_AGENT_FUNCTION It gives access to functionality for outputting spatially partitioned messages

Public Functions

__device__ inline Out(const void*, unsigned int *scan_flag_messageOutput)

Constructer Initialises member variables

Parameters:

scan_flag_messageOutput – Scan flag array for optional message output

__device__ inline void setLocation(const float x, const float y) const

Sets the location for this agents message

Note

Convenience wrapper for setVariable()

Parameters:

  • x – Message x coord

  • y – Message y coord