Class T3DSparseRealArray

Unit

SparseDataSets

Declaration

type T3DSparseRealArray = class(T3DSparsePointerArray)

Description

T3DSparseRealArray acts like a 3D array of real-numbers. It provides constant time access to its elements through the its Items property. However, when many of the elements are unassigned, it can use much less memory than an array.

Hierarchy

• TObject
• T3DSparsePointerArray
• T3DSparseRealArray

Overview

Fields

	FCount: NativeInt;
	FValues: array of double;
	FCached: Boolean;
	FTempFileName: string;
	FCleared: Boolean;

Methods

	function GetItems(const Layer, Row, Col: NativeInt): double;
	procedure SetItems(const Layer, Row, Col: NativeInt; const Value: double);
	procedure StoreData(Compressor: TStream);
	procedure Restore;
	procedure ReadData(DecompressionStream: TStream);
	procedure RemoveValue(const Layer, Row, Col: NativeInt);
	procedure Clear; override;
	constructor Create(Quantum: TSPAQuantum);
	destructor Destroy; override;
	procedure Cache;
	procedure CheckRestore;

Properties

property Items[constLayer,Row,Col:NativeInt]: double read GetItems write SetItems;

Description

Fields

	FCount: NativeInt;
FCount is the number of real numbers stored in T3DSparseRealArray.

	FValues: array of double;
FValues is an array of real numbers stored in T3DSparseRealArray

	FCached: Boolean;

	FTempFileName: string;

	FCleared: Boolean;

Methods

	function GetItems(const Layer, Row, Col: NativeInt): double;
See Items.

	procedure SetItems(const Layer, Row, Col: NativeInt; const Value: double);
See Items.

	procedure StoreData(Compressor: TStream);

	procedure Restore;

	procedure ReadData(DecompressionStream: TStream);

	procedure RemoveValue(const Layer, Row, Col: NativeInt);

	procedure Clear; override;
Clear removes all the members of T3DSparseRealArray.

	constructor Create(Quantum: TSPAQuantum);
Create creates an instance of T3DSparseRealArray.

	destructor Destroy; override;

	procedure Cache;

	procedure CheckRestore;

Properties

	property Items[constLayer,Row,Col:NativeInt]: double read GetItems write SetItems;
Items provides access to the real number stored at location Layer, Row, Col. Before reading Items, read IsValue to be sure that a number is stored at Layer, Row, Col.