m3g09
Class BillboardSample

java.lang.Object
  javax.microedition.lcdui.Displayable
      javax.microedition.lcdui.Canvas
          javax.microedition.lcdui.game.GameCanvas
              m3g09.BillboardSample

All Implemented Interfaces:

Sample

public class BillboardSample
extends javax.microedition.lcdui.game.GameCanvas
implements Sample

This sample displays a field of flowers to demonstrate two alternative billboard techniques: daisies and knotweeds use screen-aligned Sprite3Ds; tulips and irises use axis-aligned, textured quads.

Author:

Claus Hoefele

Field Summary

private javax.microedition.m3g.Group	alignNode Group used for alignment.
private javax.microedition.m3g.Group	cameraGroup Group that contains camera.
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 javax.microedition.m3g.World	world Root node of 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

BillboardSample()
Constructor.

Method Summary

private javax.microedition.m3g.Node	createGrass() Creates a patch of grass for the flower field.
private javax.microedition.m3g.Group	createSprite3D(int number) Creates a number of billboards using screen-aligned Sprite3Ds.
private javax.microedition.m3g.Group	createTexturedQuad(int number) Creates a number of billboards using axis-aligned, textured quads.
void	destroy() Destroys the sample.
private javax.microedition.m3g.Group	distribute(javax.microedition.m3g.Group group) Distributes the children of the given group randomly on the x-z plane.
private void	drawMenu(javax.microedition.lcdui.Graphics graphics) Draws a menu for the current key assignments.
void	init() Initializes the sample.
protected void	keyPressed(int keyCode) Handles key presses.
private void	render(javax.microedition.lcdui.Graphics graphics) Renders the sample.

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, 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

world

private javax.microedition.m3g.World world

Root node of world.

cameraGroup

private javax.microedition.m3g.Group cameraGroup

Group that contains camera.

alignNode

private javax.microedition.m3g.Group alignNode

Group used for alignment.

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

BillboardSample

public BillboardSample()

Constructor.

Method Detail

init

public void init()

Initializes the sample.

Specified by:

init in interface Sample

destroy

public void destroy()

Destroys the sample.

Specified by:

destroy in interface Sample

createGrass

private javax.microedition.m3g.Node createGrass()

Creates a patch of grass for the flower field.

Returns:

grass field.

createSprite3D

private javax.microedition.m3g.Group createSprite3D(int number)

Creates a number of billboards using screen-aligned Sprite3Ds.

Parameters:

number - number of billboards to create.

Returns:

Group node with billboards as children.

createTexturedQuad

private javax.microedition.m3g.Group createTexturedQuad(int number)

Creates a number of billboards using axis-aligned, textured quads.

Parameters:

number - number of billboards to create.

Returns:

Group node with billboards as children.

distribute

private javax.microedition.m3g.Group distribute(javax.microedition.m3g.Group group)

Distributes the children of the given group randomly on the x-z plane.

Parameters:

group - Group with children to distribute.

Returns:

same object as given as parameter.

render

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

Renders the sample.

Parameters:

graphics - graphics context for drawing.

keyPressed

protected void keyPressed(int keyCode)

Handles key presses.

Overrides:

keyPressed in class javax.microedition.lcdui.Canvas

Parameters:

keyCode - key code.

drawMenu

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

Draws a menu for the current key assignments.

Parameters:

graphics - graphics context for drawing.