m3g05
Class ModelTransformationsSample

java.lang.Object
  javax.microedition.lcdui.Displayable
      javax.microedition.lcdui.Canvas
          javax.microedition.lcdui.game.GameCanvas
              m3g05.ModelTransformationsSample

All Implemented Interfaces:

Sample

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

Sample displaying a cube that can be transformed interactively.

Author:

Claus Hoefele

Field Summary

private int	currentTransformation Current transformation.
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.Mesh	mesh Mesh for display.
private javax.microedition.m3g.Transform	meshTransform The mesh's transformation.
private boolean	rotateBeforeTransform Flag for swapping order of rotation and translation.
private float	rotX Current rotation value.
private float	rotY Current rotation value.
private float	rotZ Current rotation value.
private float	scaleX Current scale value.
private float	scaleY Current scale value.
private float	scaleZ Current scale value.
private float[]	shearTransform Current shear matrix.
private static int	TRANSFORMATION_ROTATE Indicates rotation.
private static int	TRANSFORMATION_SCALE Indicates scaling.
private static int	TRANSFORMATION_SHEAR Indicates shearing.
private static int	TRANSFORMATION_TRANSLATE Indicates translation.
private static int	TRANSFORMATION_X_AXIS Indicates transformation along x axis.
private static int	TRANSFORMATION_Y_AXIS Indicates transformation along y axis.
private static int	TRANSFORMATION_Z_AXIS Indicates transformation along z axis.
private float	transX Current translation value.
private float	transY Current translation value.
private float	transZ Current translation value.

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

ModelTransformationsSample()
Constructor.

Method Summary

void	destroy() Destroys the sample.
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.
private void	setTransformationValues(int transformation, int axis, boolean positiveDirection) Updates the current transformation values.
private void	transform(javax.microedition.m3g.Transform transform) Applies the current transformation values to the given Transform object.

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

rotX

private float rotX

Current rotation value.

rotY

private float rotY

Current rotation value.

rotZ

private float rotZ

Current rotation value.

transX

private float transX

Current translation value.

transY

private float transY

Current translation value.

transZ

private float transZ

Current translation value.

scaleX

private float scaleX

Current scale value.

scaleY

private float scaleY

Current scale value.

scaleZ

private float scaleZ

Current scale value.

shearTransform

private float[] shearTransform

Current shear matrix.

rotateBeforeTransform

private boolean rotateBeforeTransform

Flag for swapping order of rotation and translation.

mesh

private javax.microedition.m3g.Mesh mesh

Mesh for display.

meshTransform

private javax.microedition.m3g.Transform meshTransform

The mesh's transformation.

TRANSFORMATION_X_AXIS

private static final int TRANSFORMATION_X_AXIS

Indicates transformation along x axis.

See Also:

Constant Field Values

TRANSFORMATION_Y_AXIS

private static final int TRANSFORMATION_Y_AXIS

Indicates transformation along y axis.

See Also:

Constant Field Values

TRANSFORMATION_Z_AXIS

private static final int TRANSFORMATION_Z_AXIS

Indicates transformation along z axis.

See Also:

Constant Field Values

TRANSFORMATION_TRANSLATE

private static final int TRANSFORMATION_TRANSLATE

Indicates translation.

See Also:

Constant Field Values

TRANSFORMATION_ROTATE

private static final int TRANSFORMATION_ROTATE

Indicates rotation.

See Also:

Constant Field Values

TRANSFORMATION_SCALE

private static final int TRANSFORMATION_SCALE

Indicates scaling.

See Also:

Constant Field Values

TRANSFORMATION_SHEAR

private static final int TRANSFORMATION_SHEAR

Indicates shearing.

See Also:

Constant Field Values

currentTransformation

private int currentTransformation

Current transformation.

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

ModelTransformationsSample

public ModelTransformationsSample()

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

render

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

Renders the sample.

Parameters:

graphics - graphics context for rendering.

transform

private void transform(javax.microedition.m3g.Transform transform)

Applies the current transformation values to the given Transform object.

Parameters:

transform - Transform object

keyPressed

protected void keyPressed(int keyCode)

Handles key presses.

Overrides:

keyPressed in class javax.microedition.lcdui.Canvas

Parameters:

keyCode - key code.

setTransformationValues

private void setTransformationValues(int transformation,
                                     int axis,
                                     boolean positiveDirection)

Updates the current transformation values.

Parameters:

transformation - type of transformation.

axis - axis of translation.

positiveDirection - true for increasing, false for decreasing value.

drawMenu

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

Draws a menu for the current key assignments.

Parameters:

graphics - graphics context for drawing.