Class SymGrid

java.lang.Object

org.ddogleg.chainrule.sym.SymGrid

public class SymGrid
extends Object

A bilinear knot grid whose per-knot polynomials are conditional on a value: the composite behind the notation G(u; v), written G.at(u).of(v). One instance owns one parameter block, however many places it is read.

A read expands to two operators — weights at the pixel, then a polynomial blending the four surrounding knots — plus the hook that hands those knots' parameter slices to the polynomial once the pixel is known, and the Jacobian captures publishing them as columns. The hook and the captures arrive through SymExtension, so the graph builder needs no notion of a grid.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	SymGrid.Read	A read in progress: at(Sym) fixed the pixel, SymGrid.Read.of(Sym) fixes the conditioning value

Field Summary

Fields

Modifier and Type	Field	Description
final ConfigGridCoefND	config
final int	height
final Sym	knots	The knot coefficients, a Sym.param(String, int) terminal sized to the grid
final int	width

Constructor Summary

Constructors

Constructor	Description
SymGrid(String name, ConfigGridCoefND config, int width, int height)

Method Summary

Modifier and Type	Method	Description
SymGrid.Read	at(Sym pixel)	The field position the grid is read at, an expression producing a pixel

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

config

public final ConfigGridCoefND config

width

public final int width

height

public final int height

knots

public final Sym knots

The knot coefficients, a Sym.param(String, int) terminal sized to the grid

Constructor Details

SymGrid

public SymGrid(String name,
 ConfigGridCoefND config,
 int width,
 int height)

Method Details

at

public SymGrid.Read at(Sym pixel)

The field position the grid is read at, an expression producing a pixel