org.j3d.terrain
Class AbstractTiledTerrainData

java.lang.Object
  org.j3d.terrain.AbstractTerrainData
      org.j3d.terrain.AbstractTiledTerrainData

All Implemented Interfaces:

HeightDataSource, TerrainData, TiledTerrainData

Direct Known Subclasses:

SimpleTiledTerrainData

public abstract class AbstractTiledTerrainData

extends AbstractTerrainData

implements TiledTerrainData

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.

Version:

$Revision: 1.4 $

Author:

Justin Couch

Field Summary

protected int	gridPointsPerTile The number of grid points per tile.
protected TextureTileGenerator	tileGenerator Reference to the currently set texture tile generator

Fields inherited from class org.j3d.terrain.AbstractTerrainData

colorAvailable, gridStepX, gridStepY, textureAvailable

Fields inherited from interface org.j3d.terrain.TerrainData

FREEFORM_DATA, STATIC_DATA, TILED_DATA

Constructor Summary

protected

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

Method Summary

protected int	convertGridToTileCoord(int grid) Convenience method to convert the grid coordinate to the tile that it belongs in.
protected int	convertTileToGridCoord(int tile) Convenience method to convert the tile coordinate to a grid coordinate
java.awt.image.BufferedImage	getTexture(int tileX, int tileY) Fetch the texture or part of a texture that can be applied to the sub-region of the overall object.
int	getTileSize() Get the number of grid points along one side of a single tile.
void	setTextureTileGenerator(TextureTileGenerator gen) Set the texture tile geneattor instance to the new value.

Methods inherited from class org.j3d.terrain.AbstractTerrainData

getGridXStep, getGridYStep, getSourceDataType, hasColor, hasTexture

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.TiledTerrainData

getTilesAvailableBounds, setActiveBounds

Methods inherited from interface org.j3d.terrain.TerrainData

getCoordinate, getCoordinate, getCoordinateWithColor, getCoordinateWithTexture, getGridXStep, getGridYStep, getHeightFromGrid, getSourceDataType, hasColor, hasTexture

Methods inherited from interface org.j3d.ui.navigation.HeightDataSource

getHeight

Field Detail

tileGenerator

protected TextureTileGenerator tileGenerator

Reference to the currently set texture tile generator

gridPointsPerTile

protected int gridPointsPerTile

The number of grid points per tile.

Constructor Detail

AbstractTiledTerrainData

protected AbstractTiledTerrainData()

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

Method Detail

getTileSize

public int getTileSize()

Get the number of grid points along one side of a single tile.

Specified by:

getTileSize in interface TiledTerrainData

Returns:

The number of points in the size if the grid

getTexture

public java.awt.image.BufferedImage getTexture(int tileX,
                                               int tileY)

Fetch the texture or part of a texture that can be applied to the sub-region of the overall object. This is to allow for texture tiling of very large texture images or terrain items. If there is no texture or no texture for that region, then this should return null.

Specified by:

getTexture in interface TiledTerrainData

Parameters:

tileX - the x coordinate of the tile number for the texture

tileY - the y coordinate of the tile number for the texture

Returns:

The texture object suitable for that bounds or null

setTextureTileGenerator

public void setTextureTileGenerator(TextureTileGenerator gen)

Set the texture tile geneattor instance to the new value. Setting a value of null will clear the current instance. Calling this method with a non-null generator instance does not automatically set the has texture flag.

Parameters:

gen - The new generator instance to use

convertTileToGridCoord

protected int convertTileToGridCoord(int tile)

Convenience method to convert the tile coordinate to a grid coordinate

Parameters:

tile - The tile coordinate

Returns:

The equivalent grid coordinate

convertGridToTileCoord

protected int convertGridToTileCoord(int grid)

Convenience method to convert the grid coordinate to the tile that it belongs in. If the point is exactly on the edge of a grid, the value returned is for the larger tile coordinate.

Parameters:

grid - The grid coordinate

Returns:

The equivalent grid coordinate