ca_reproduction_support.H File Reference

Internal helpers shared by the cellular-automata reproductions. More...

#include <algorithm>
#include <array>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <filesystem>
#include <fstream>
#include <istream>
#include <iterator>
#include <map>
#include <ostream>
#include <random>
#include <string>
#include <utility>
#include <vector>
#include <ah-errors.H>
#include <ca-png.H>
#include <ca-rng.H>
#include <ca-traits.H>
#include <tpl_ca_continuous_rules.H>
#include <tpl_ca_engine.H>
#include <tpl_ca_lattice.H>
#include <tpl_ca_neighborhood.H>
#include <tpl_ca_storage.H>
#include <tpl_ca_update_scheme.H>

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Classes
struct	Aleph::CA::Reproductions::Linear_Fit
	Least-squares result for a log-log histogram. More...
struct	Aleph::CA::Reproductions::Avalanche
	Avalanche measurements for one BTW grain drop. More...
class	Aleph::CA::Reproductions::BTW_Sandpile
	Deterministic open-boundary Bak-Tang-Wiesenfeld sandpile. More...
struct	Aleph::CA::Reproductions::Gray_Scott_Preset
	One named Gray-Scott parameter preset. More...
struct	Aleph::CA::Reproductions::Native_Png
	Decoded subset of the dependency-free native PNG format. More...

Namespaces
namespace	Aleph
	Main namespace for Aleph-w library functions.
namespace	Aleph::CA
namespace	Aleph::CA::Reproductions

Typedefs
using	Aleph::CA::Reproductions::Gray_Scott_Cell = Reaction_Diffusion_Cell< double >
using	Aleph::CA::Reproductions::Gray_Scott_Lattice = Lattice< Dense_Cell_Storage< Gray_Scott_Cell, 2 >, NeumannBoundary >

Functions
Linear_Fit	Aleph::CA::Reproductions::fit_log_log_histogram (const std::vector< std::size_t > &samples, const std::size_t min_value, const std::size_t max_value, const std::size_t bins, const double sample_weight_power=0.0)
	Fit a power-law exponent from logarithmically binned samples.
void	Aleph::CA::Reproductions::write_histogram_csv (const std::filesystem::path &path, const std::vector< std::size_t > &samples)
	Write an exact discrete histogram as CSV.
template<typename Lattice >
double	Aleph::CA::Reproductions::morans_i_binary (const Lattice &frame, const typename Lattice::state_type empty_state, const typename Lattice::state_type type_a, const typename Lattice::state_type type_b)
	Compute Moran's I for two occupied Schelling cell types.
Gray_Scott_Lattice	Aleph::CA::Reproductions::make_gray_scott_seed (const ca_size_t side, const std::uint64_t master_seed)
	Build the deterministic finite-amplitude Gray-Scott perturbation.
Gray_Scott_Lattice	Aleph::CA::Reproductions::run_gray_scott (const Gray_Scott_Preset &preset, const ca_size_t side, const std::size_t steps, const std::uint64_t master_seed)
	Run one Gray-Scott preset from the shared deterministic seed.
RGB8	Aleph::CA::Reproductions::gray_scott_rgb (const Gray_Scott_Cell &cell)
	Convert one Gray-Scott state to an RGB colour.
void	Aleph::CA::Reproductions::write_gray_scott_png (const std::filesystem::path &path, const Gray_Scott_Lattice &frame)
	Write a Gray-Scott frame as a native Aleph RGB PNG.
Native_Png	Aleph::CA::Reproductions::decode_native_png (std::istream &in)
	Decode a PNG emitted by Aleph::CA::write_png.
Native_Png	Aleph::CA::Reproductions::read_native_png (const std::filesystem::path &path)
	Read and decode a native Aleph PNG.
double	Aleph::CA::Reproductions::mean_channel_difference (const Native_Png &lhs, const Native_Png &rhs)
	Compute normalized mean absolute per-channel PNG difference.
template<typename F >
void	Aleph::CA::Reproductions::for_each_gosper_gun_cell (F &&visitor, const std::int64_t offset_x=0, const std::int64_t offset_y=0)
	Visit every live coordinate in the canonical Gosper gun.

Variables
constexpr std::array< Gray_Scott_Preset, 3 >	Aleph::CA::Reproductions::gray_scott_presets
	Canonical visual presets used by the weekly Gray-Scott reproduction.
constexpr std::array< std::array< std::int64_t, 2 >, 36 >	Aleph::CA::Reproductions::gosper_gun_cells
	Canonical 36-cell Gosper glider gun.

Detailed Description

Internal helpers shared by the cellular-automata reproductions.

This header is intentionally local to reproductions/: it is scientific tooling, not part of the installed Aleph API. The helpers keep the weekly reproductions and their reduced smoke tests on the same code paths.

Definition in file ca_reproduction_support.H.