org.deegree.rendering.r3d.multiresolution
Class MeshFragment

java.lang.Object
  org.deegree.rendering.r3d.multiresolution.MeshFragment

All Implemented Interfaces:

Comparable<MeshFragment>

public class MeshFragment
extends Object
implements Comparable<MeshFragment>

Encapsulates the bounding box and approximation error for a fragment of a MultiresolutionMesh and provides access to the actual geometry data.

Version:

$Revision$

Author:

Markus Schneider, last edited by: $Author$

Field Summary

float[][]	bbox The bbox of the frament
float	error The geometric error.
int	id the id of the mesh fragment
static int	SIZE Size of binary representation (in bytes).

Constructor Summary

MeshFragment(int id, ByteBuffer buffer, MeshFragmentDataReader patchReader)

Method Summary

boolean	canAllocateEnoughMemory()
int	compareTo(MeshFragment o)
long	getLastByteOffset()
long	getOffset()
MeshFragmentData	loadData() Retrieves the actual geometry data of the MeshFragment.
int	size()
static void	store(ByteBuffer target, float[][] bbox, float error, long blobPosition, int length) Save this fragment to the given byte buffer.
static void	store(ByteBuffer target, float minX, float minY, float minZ, float maxX, float maxY, float maxZ, float error, long blobPosition, int length) Save this fragment to the given ByteBuffer.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

SIZE

public static int SIZE

Size of binary representation (in bytes). NOTE: This is just the meta information of the patch, not the geometry data.

id

public final int id

the id of the mesh fragment

bbox

public final float[][] bbox

The bbox of the frament

error

public final float error

The geometric error.

Constructor Detail

MeshFragment

MeshFragment(int id,
             ByteBuffer buffer,
             MeshFragmentDataReader patchReader)

Method Detail

getOffset

public long getOffset()

Returns:

offset of in the file.

getLastByteOffset

public long getLastByteOffset()

Returns:

the last byte position.

loadData

public MeshFragmentData loadData()
                          throws IOException

Retrieves the actual geometry data of the MeshFragment.

NOTE: Calling this method usually involves I/O and memory allocation operations and the caller should probably incorporate caching mechanisms to reduce the number of calls.

Returns:

the actual geometry data of the fragment

Throws:

IOException

store

public static void store(ByteBuffer target,
                         float minX,
                         float minY,
                         float minZ,
                         float maxX,
                         float maxY,
                         float maxZ,
                         float error,
                         long blobPosition,
                         int length)

Save this fragment to the given ByteBuffer.

Parameters:

target -

minX -

minY -

minZ -

maxX -

maxY -

maxZ -

error -

blobPosition -

length -

store

public static void store(ByteBuffer target,
                         float[][] bbox,
                         float error,
                         long blobPosition,
                         int length)

Save this fragment to the given byte buffer.

Parameters:

target -

bbox -

error -

blobPosition -

length -

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(MeshFragment o)

Specified by:

compareTo in interface Comparable<MeshFragment>

size

public int size()

Returns:

the size in bytes of this mesh fragment

canAllocateEnoughMemory

public boolean canAllocateEnoughMemory()

Returns:

true if the used direct buffer pool can allocate enough direct memory for the given data.