Elements

DFT element primitives: fields, kernels, stimuli, noise, and couplings. More...

Collaboration diagram for Elements:

Modules
	Activation Functions
	Pointwise nonlinearities applied to neural field activation.

Classes
class	dnf_composer::element::AsymmetricGaussKernel
	Spatially shifted Gaussian kernel that induces directional peak drift. More...
struct	dnf_composer::element::AsymmetricGaussKernelParameters
	Parameters for an asymmetric (shifted) Gaussian convolution kernel. More...
class	dnf_composer::element::BoostStimulus
	Spatially uniform (homogeneous) input stimulus. More...
struct	dnf_composer::element::BoostStimulusParameters
	Parameters for a spatially homogeneous boost stimulus. More...
class	dnf_composer::element::Collapse
	Collapses a 2D input field to a 1D output by reducing along one axis. More...
struct	dnf_composer::element::CollapseParameters
	Parameters for a Collapse (2D -> 1D) element. More...
class	dnf_composer::element::CorrelatedNormalNoise
	Spatially correlated Gaussian noise source — cedar-compatible. More...
struct	dnf_composer::element::CorrelatedNormalNoiseParameters
	Parameters for a spatially correlated Gaussian noise source. More...
class	dnf_composer::element::Element
	Abstract base class for all simulation elements. More...
class	dnf_composer::element::ElementFactory
	Factory that creates concrete Element objects from type labels and parameters. More...
class	dnf_composer::element::Expand
	Expands a 1D input field to a 2D output by broadcasting along one axis. More...
struct	dnf_composer::element::ExpandParameters
	Parameters for an Expand (1D -> 2D) element. More...
class	dnf_composer::element::FieldCoupling
	Full-matrix learned coupling between two neural fields. More...
struct	dnf_composer::element::FieldCouplingParameters
	Parameters for a learned full-matrix field coupling. More...
struct	dnf_composer::element::GaussCoupling
	A single sparse Gaussian point-coupling between two spatial locations. More...
class	dnf_composer::element::GaussFieldCoupling
	Sparse Gaussian field coupling with a fixed, user-defined projection. More...
struct	dnf_composer::element::GaussFieldCouplingParameters
	Parameters for a sparse Gaussian field coupling (fixed projection). More...
class	dnf_composer::element::GaussKernel
	Gaussian convolution kernel providing local excitation and optional global inhibition. More...
struct	dnf_composer::element::GaussKernelParameters
	Parameters for a Gaussian lateral interaction kernel. More...
class	dnf_composer::element::GaussStimulus
	Localized Gaussian input stimulus applied to a neural field. More...
struct	dnf_composer::element::GaussStimulusParameters
	Parameters for a Gaussian-shaped external stimulus. More...
class	dnf_composer::element::Kernel
	Abstract base class for all convolution-based interaction kernels. More...
class	dnf_composer::element::MemoryTrace
	Persistent spatial memory that accumulates and decays field activity. More...
class	dnf_composer::element::MemoryTrace2D
	Persistent 2D spatial memory that accumulates and decays field activity. More...
struct	dnf_composer::element::MemoryTrace2DParameters
	Parameters governing MemoryTrace2D build-up and decay dynamics. More...
struct	dnf_composer::element::MemoryTraceParameters
	Parameters governing MemoryTrace build-up and decay dynamics. More...
class	dnf_composer::element::MexicanHatKernel
	Difference-of-Gaussians convolution kernel for DFT lateral interactions. More...
struct	dnf_composer::element::MexicanHatKernelParameters
	Parameters for a Mexican-hat lateral interaction kernel. More...
class	dnf_composer::element::NeuralField
	Continuous attractor neural field — the core DFT building block. More...
struct	dnf_composer::element::NeuralFieldBump
	Describes a single activation bump (peak) in a neural field. More...
struct	dnf_composer::element::NeuralFieldParameters
	Parameters that govern a NeuralField's dynamics. More...
struct	dnf_composer::element::NeuralFieldState
	Snapshot of a neural field's observable state. More...
class	dnf_composer::element::NormalNoise
	Additive Gaussian noise source for neural fields. More...
struct	dnf_composer::element::NormalNoiseParameters
	Parameters for an additive normal-noise input. More...
class	dnf_composer::element::OscillatoryKernel
	Damped-cosine convolution kernel for oscillatory field dynamics. More...
struct	dnf_composer::element::OscillatoryKernelParameters
	Parameters for an oscillatory (damped-cosine) convolution kernel. More...
class	dnf_composer::element::Resize
	Resamples a 1D input field of size N to this element's output size M. More...
class	dnf_composer::element::Resize2D
	Resamples a 2D input field of size (Nx x Ny) to this element's output size (Mx x My). More...
struct	dnf_composer::element::Resize2DParameters
	Parameters for a 2D Resize element. More...
struct	dnf_composer::element::ResizeParameters
	Parameters for a 1D Resize element. More...

Enumerations
enum class	dnf_composer::element::CompressionType : int { dnf_composer::element::CompressionType::SUM , dnf_composer::element::CompressionType::AVERAGE , dnf_composer::element::CompressionType::MAXIMUM , dnf_composer::element::CompressionType::MINIMUM }
	Reduction applied when collapsing one axis of a 2D field to 1D. More...
enum class	dnf_composer::element::InterpolationMethod : int { dnf_composer::element::InterpolationMethod::LINEAR , dnf_composer::element::InterpolationMethod::NEAREST , dnf_composer::element::InterpolationMethod::CUBIC }
	Interpolation method used when resampling an input field to a new size. More...
enum class	dnf_composer::LearningRule : int { dnf_composer::LearningRule::HEBB , dnf_composer::LearningRule::OJA , dnf_composer::LearningRule::DELTA }
	Selects the synaptic weight update rule used by FieldCoupling. More...
enum class	dnf_composer::element::ProjectionAxis : int { dnf_composer::element::ProjectionAxis::X , dnf_composer::element::ProjectionAxis::Y }
	Spatial axis a projection acts on. More...

Detailed Description

DFT element primitives: fields, kernels, stimuli, noise, and couplings.

Enumeration Type Documentation

CompressionType

enum class dnf_composer::element::CompressionType : int

strong

Reduction applied when collapsing one axis of a 2D field to 1D.

Enumerator
SUM	Sum along the collapsed axis.
AVERAGE	Mean along the collapsed axis.
MAXIMUM	Maximum along the collapsed axis.
MINIMUM	Minimum along the collapsed axis.

InterpolationMethod

enum class dnf_composer::element::InterpolationMethod : int

strong

Interpolation method used when resampling an input field to a new size.

Enumerator
LINEAR	Piecewise linear interpolation.
NEAREST	Nearest-neighbour sampling.
CUBIC	Catmull-Rom cubic spline interpolation.

LearningRule

enum class dnf_composer::LearningRule : int

strong

Selects the synaptic weight update rule used by FieldCoupling.

Enumerator
HEBB	Classic Hebbian: Δw ∝ pre × post.
OJA	Oja's rule: Hebbian with weight-decay for stability.
DELTA	Delta rule: error-driven weight updates.

ProjectionAxis

enum class dnf_composer::element::ProjectionAxis : int

strong

Spatial axis a projection acts on.

Enumerator
X	The x-axis.
Y	The y-axis.