A3DGE - Amateur 3D Game Engine

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Functions and Procedures

Class TStateMachine

Fields

Unit

Declaration

type TStateMachine = class(TObject)

Description

A State Machine implementation.

This object keeps track of the current states. It also calls the Enter and Leave state methods when current state changes.

To use this object create a TStateMachine object. Then assign the Current state and call the Update method to execute the state.

See also

TState: Base class for states.
TStateMachine.Current: Current state.
TStateMachine.Update: Execute Current and Global states.

Hierarchy

TObject
TStateMachine

Overview

Methods

	`procedure Update (aEntity: TObject);`
	`procedure SwapPreviousState;`

Properties

	`property Current: TState read fCurrentState write SetCurrentState;`
	`property Global: TState read fGlobalState write SetGlobalState;`

Description

Methods

procedure Update (aEntity: TObject);

Execute Current and Global states.

Parameters

aEntity: Object entity asociated with the state.

See also

TStateMachine.SwapPreviousState: Swap between Current and previous states.
TStateMachine.Current: Current state.
TStateMachine.Global: If assigned, it will be executed every time along with Current.

procedure SwapPreviousState;

Swap between Current and previous states.

See also

TStateMachine.Current: Current state.
TStateMachine.Global: If assigned, it will be executed every time along with Current.

Properties

property Current: TState read fCurrentState write SetCurrentState;

Current state.

Assigning this property will trigger the execution the Leave and Enter methods of the old and new state in the next call to Update.

See also

TStateMachine.Update: Execute Current and Global states.
TStateMachine.Global: If assigned, it will be executed every time along with Current.
TStateMachine.SwapPreviousState: Swap between Current and previous states.

property Global: TState read fGlobalState write SetGlobalState;

If assigned, it will be executed every time along with Current.

This state won't be affected by SwapPreviousState.

See also

TStateMachine.Current: Current state.
TStateMachine.SwapPreviousState: Swap between Current and previous states.

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