org.j3d.terrain

Class AbstractTerrainData

java.lang.Object

org.j3d.terrain.AbstractTerrainData

All Implemented Interfaces:

HeightDataSource, TerrainData

Direct Known Subclasses:

AbstractFreeFormTerrainData, AbstractStaticTerrainData, AbstractTiledTerrainData

public abstract class AbstractTerrainData
extends Object
implements TerrainData

An abstract representation of the base functionality for a TerrainData implementation.

This class provides a lot of the common functionality that all implementations will require. Good to save you typing. Does not allow you to directly extend this class. It is provided for basic common functionality that is extended by the more derived versions.

Version:

$Revision: 1.3 $

Author:

Justin Couch

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	colorAvailable Flag indicating if colour data is available from this dataset.
protected double	gridStepX The real world distance between each X (width) grid position
protected double	gridStepY The real world distance between each Y (depth) grid position
protected boolean	textureAvailable Flag indicating if texture data is available from this dataset.

Fields inherited from interface org.j3d.terrain.TerrainData

FREEFORM_DATA, STATIC_DATA, TILED_DATA

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractTerrainData(int dataType) Create a new instance.of this data class with all flags set to false.

Method Summary

Modifier and Type	Method and Description
double	getGridXStep() Get the real world distance between consecutive X values in the grid.
double	getGridYStep() Get the real world distance between consecutive Y values in the grid.
int	getSourceDataType() Get the type of terrain data that we are dealing with.
boolean	hasColor() Check to see if this terrain data has per-vertex colours.
boolean	hasTexture() Check to see if this terrain data has any texturing at all - either tiled or simple.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.j3d.terrain.TerrainData

getCoordinate, getCoordinate, getCoordinateWithColor, getCoordinateWithTexture, getHeightFromGrid

Methods inherited from interface org.j3d.geom.terrain.HeightDataSource

getHeight

Field Detail

colorAvailable

protected boolean colorAvailable

Flag indicating if colour data is available from this dataset.

textureAvailable

protected boolean textureAvailable

Flag indicating if texture data is available from this dataset.

gridStepX

protected double gridStepX

The real world distance between each X (width) grid position

gridStepY

protected double gridStepY

The real world distance between each Y (depth) grid position

Constructor Detail

AbstractTerrainData

protected AbstractTerrainData(int dataType)

Create a new instance.of this data class with all flags set to false.

Parameters:

dataType - The type of data that this instance represents

Method Detail

getSourceDataType

public int getSourceDataType()

Get the type of terrain data that we are dealing with. One of the constant types are returned. More efficient way of dealing with multiple types than using instanceof

Specified by:

getSourceDataType in interface TerrainData

Returns:

The type of data that this instance represents

hasColor

public boolean hasColor()

Check to see if this terrain data has per-vertex colours. Colour may be used with or separately from the texture data. This allows you to use colours to modulate the texture information if desired. Note that if you provide per-vertex colour information here, you need to be careful with the appearance information that gets set if you provide a custom appearance generator implementation that comes with the renderer-specific versions of this class.

Specified by:

hasColor in interface TerrainData

Returns:

true If per-vertex color is available

hasTexture

public boolean hasTexture()

Check to see if this terrain data has any texturing at all - either tiled or simple.

Specified by:

hasTexture in interface TerrainData

Returns:

true If a texture(s) is available

getGridXStep

public double getGridXStep()

Get the real world distance between consecutive X values in the grid.

Specified by:

getGridXStep in interface TerrainData

Returns:

The distance between each step of the grid

getGridYStep

public double getGridYStep()

Get the real world distance between consecutive Y values in the grid.

Specified by:

getGridYStep in interface TerrainData

Returns:

The distance between each step of the grid