Class In::VonNeumannFilter

Nested Relationships

This class is a nested type of Class MessageArray2D::In.

Nested Types

Class Documentation

class VonNeumannFilter

This class is created when a search origin is provided to MessageArray2D::In::vn(size_type, size_type, size_type = 1) It provides iterator access to a subset of the full message list, according to the provided search origin and radius The radius does not wrap the message list bounds

See also

MessageArray2D::In::vn(size_type, size_type, size_type)

Public Functions

__device__ inline VonNeumannFilter(const MetaData *_metadata, size_type x, size_type y, size_type _radius)

Constructor, takes the search parameters required

Parameters:

  • _metadata – Pointer to message list metadata

  • x – Search origin x coord

  • y – Search origin y coord

  • _radius – Search radius

__device__ inline VonNeumannFilter()

A null filter which always returns 0 messages

__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 VonNeumannFilter &parent, const int relative_x, const int relative_y)

Constructor This iterator is constructed by MessageArray2D::In::Filter::begin()(size_type, size_type, size_type)

See also

MessageArray2D::In::Operator()(size_type, size_type, size_type)

__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 VonNeumannFilter &parent, const int relative_x, const int relative_y)

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

Note

See member variable documentation for their purposes

__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

Inequality operator Returns inverse of equality operator

See also

operator==(const Message&)

__device__ inline Message &operator++()

Updates the message to return variables from the next cell in the Moore neighbourhood

Returns:

Returns itself

__device__ inline size_type getX() const

Returns x array index of message

__device__ inline size_type getY() const

Returns y array index of message

__device__ inline int getOffsetX() const

Returns the x array offset of message relative to the search origin

__device__ inline int getOffsetY() const

Returns the y array offset of message relative to the search origin

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)