m3g12
Class RobotSample

java.lang.Object
  javax.microedition.lcdui.Displayable
      javax.microedition.lcdui.Canvas
          javax.microedition.lcdui.game.GameCanvas
              m3g12.RobotSample

All Implemented Interfaces:

java.lang.Runnable, Sample

public class RobotSample
extends javax.microedition.lcdui.game.GameCanvas
implements Sample, java.lang.Runnable

Displays a walking robot that can be controlled with the game keys.

Author:

Claus Hoefele

Field Summary

private javax.microedition.m3g.AnimationController	controller The robot's animation controller.
private static int	DATA_DISTANCE State data index for walking distance.
private static int	DATA_DURATION State data index for animation duration.
private static int	DATA_FALSE_STATE State data index for next state if key was not pressed.
private static int	DATA_KEY State data index for key to move to the next state.
private static int	DATA_SPEED State data index for animation speed.
private static int	DATA_START State data index for animation start time.
private static int	DATA_TRUE_STATE State data index for next state if key was pressed.
private float	direction Current walking direction.
private javax.microedition.lcdui.Graphics	graphics 2D graphics singleton used for rendering.
private javax.microedition.m3g.Graphics3D	graphics3d 3D graphics singleton used for rendering.
private boolean	isRunning Flag for stopping the animation thread.
private static java.lang.String	M3G_FILE File that stores the scene graph.
private javax.microedition.m3g.SkinnedMesh	mesh Robot.
private javax.microedition.m3g.Group	position The robot's position.
private int	state Current state.
private static int[][]	STATE_DATA State data.
private static int	STATE_IDLE State index for idle state.
private static int	STATE_INVALID State index for invalid state.
private static int	STATE_STARTING State index for starting state.
private static int	STATE_STOPPING State index for stopping state.
private static int	STATE_WALKING State index for walking state.
private int	stateTime Time since last state update.
private javax.microedition.m3g.Transform	transform Helper object for transformation.
private static int	USER_ID_MESH User ID to find the mesh inside the scene graph.
private javax.microedition.m3g.World	world Object that represents the 3D world.

Fields inherited from class javax.microedition.lcdui.game.GameCanvas

DOWN_PRESSED, FIRE_PRESSED, GAME_A_PRESSED, GAME_B_PRESSED, GAME_C_PRESSED, GAME_D_PRESSED, LEFT_PRESSED, RIGHT_PRESSED, UP_PRESSED

Fields inherited from class javax.microedition.lcdui.Canvas

DOWN, FIRE, GAME_A, GAME_B, GAME_C, GAME_D, KEY_NUM0, KEY_NUM1, KEY_NUM2, KEY_NUM3, KEY_NUM4, KEY_NUM5, KEY_NUM6, KEY_NUM7, KEY_NUM8, KEY_NUM9, KEY_POUND, KEY_STAR, LEFT, RIGHT, UP

Constructor Summary

RobotSample()
Constructor.

Method Summary

private void	changeState(int state, int worldTime, int error) Changes state and updates the animation position.
void	destroy() Destroys the sample.
private void	drawMenu(javax.microedition.lcdui.Graphics graphics) Draws a menu for the current key assignments.
private int	getData(int index) Returns data for the current state.
void	init() Initializes the sample.
private void	process(int worldTime, int stateDelta) Checks for key presses and advances the state machine.
protected void	render(javax.microedition.lcdui.Graphics graphics) Renders the sample.
void	reset() Initializes the sample.
void	run() Animation loop.

Methods inherited from class javax.microedition.lcdui.game.GameCanvas

flushGraphics, flushGraphics, getGraphics, getKeyStates, paint

Methods inherited from class javax.microedition.lcdui.Canvas

getGameAction, getKeyCode, getKeyName, hasPointerEvents, hasPointerMotionEvents, hasRepeatEvents, hideNotify, isDoubleBuffered, keyPressed, keyReleased, keyRepeated, pointerDragged, pointerPressed, pointerReleased, repaint, repaint, serviceRepaints, setCommandListener, setFullScreenMode, showNotify, sizeChanged

Methods inherited from class javax.microedition.lcdui.Displayable

addCommand, getHeight, getTicker, getTitle, getWidth, isShown, removeCommand, setTicker, setTitle

Methods inherited from class java.lang.Object

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

Field Detail

M3G_FILE

private static final java.lang.String M3G_FILE

File that stores the scene graph.

See Also:

Constant Field Values

USER_ID_MESH

private static final int USER_ID_MESH

User ID to find the mesh inside the scene graph.

See Also:

Constant Field Values

STATE_INVALID

private static final int STATE_INVALID

State index for invalid state.

See Also:

Constant Field Values

STATE_IDLE

private static final int STATE_IDLE

State index for idle state.

See Also:

Constant Field Values

STATE_STARTING

private static final int STATE_STARTING

State index for starting state.

See Also:

Constant Field Values

STATE_WALKING

private static final int STATE_WALKING

State index for walking state.

See Also:

Constant Field Values

STATE_STOPPING

private static final int STATE_STOPPING

State index for stopping state.

See Also:

Constant Field Values

STATE_DATA

private static final int[][] STATE_DATA

State data. Contains start time of animation, duration, speed, key assignment, true state, false state, and walking distance.

DATA_START

private static final int DATA_START

State data index for animation start time.

See Also:

Constant Field Values

DATA_DURATION

private static final int DATA_DURATION

State data index for animation duration.

See Also:

Constant Field Values

DATA_SPEED

private static final int DATA_SPEED

State data index for animation speed.

See Also:

Constant Field Values

DATA_KEY

private static final int DATA_KEY

State data index for key to move to the next state.

See Also:

Constant Field Values

DATA_TRUE_STATE

private static final int DATA_TRUE_STATE

State data index for next state if key was pressed.

See Also:

Constant Field Values

DATA_FALSE_STATE

private static final int DATA_FALSE_STATE

State data index for next state if key was not pressed.

See Also:

Constant Field Values

DATA_DISTANCE

private static final int DATA_DISTANCE

State data index for walking distance.

See Also:

Constant Field Values

stateTime

private int stateTime

Time since last state update.

state

private int state

Current state.

world

private javax.microedition.m3g.World world

Object that represents the 3D world.

mesh

private javax.microedition.m3g.SkinnedMesh mesh

Robot.

controller

private javax.microedition.m3g.AnimationController controller

The robot's animation controller.

position

private javax.microedition.m3g.Group position

The robot's position.

direction

private float direction

Current walking direction.

transform

private javax.microedition.m3g.Transform transform

Helper object for transformation.

isRunning

private boolean isRunning

Flag for stopping the animation thread.

graphics3d

private javax.microedition.m3g.Graphics3D graphics3d

3D graphics singleton used for rendering.

graphics

private javax.microedition.lcdui.Graphics graphics

2D graphics singleton used for rendering.

Constructor Detail

RobotSample

public RobotSample()

Constructor.

Method Detail

init

public void init()

Initializes the sample.

Specified by:

init in interface Sample

reset

public void reset()

Initializes the sample.

destroy

public void destroy()

Destroys the sample.

Specified by:

destroy in interface Sample

run

public void run()

Animation loop.

Specified by:

run in interface java.lang.Runnable

getData

private int getData(int index)

Returns data for the current state.

Parameters:

index - type of state data.

Returns:

data.

changeState

private void changeState(int state,
                         int worldTime,
                         int error)

Changes state and updates the animation position.

Parameters:

state - new state.

worldTime - current world time.

error - delta between the animation start and current world time.

process

private void process(int worldTime,
                     int stateDelta)

Checks for key presses and advances the state machine.

Parameters:

worldTime - current world time.

stateDelta - time since last state change.

render

protected void render(javax.microedition.lcdui.Graphics graphics)

Renders the sample.

Parameters:

graphics - graphics context for drawing.

drawMenu

private void drawMenu(javax.microedition.lcdui.Graphics graphics)

Draws a menu for the current key assignments.

Parameters:

graphics - graphics context for drawing.