org.deegree.rendering.r3d.multiresolution
Class MultiresolutionMesh

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

public class MultiresolutionMesh
extends Object

Implementation of a fragment based multiresolution model for massive triangle meshes (e.g. large terrain surfaces, but also suitable for free-form surfaces) based on the Batched Multi-Triangulation as described by Cignoni et al.

This class encapsulates the augmented multiresolution-DAG:

• nodes: each node corresponds to a modification (except the root and drain nodes)
• arcs: each arc describes the refinement of a certain region
• fragments: each fragment describes a certain region of the geometry at a certain LOD

Version:

$Revision$

Author:

Markus Schneider, last edited by: $Author$

See Also:

SelectiveRefinement, SpatialSelection, LODCriterion

Field Summary

Arc[]	arcs Contains all Arcs of the DAG, the array index corresponds to its id.
MeshFragment[]	fragments Contains all MeshFragments of the DAG, the array index corresponds to its id.
static String	FRAGMENTS_FILE_NAME Default name for the binary file that contains the mesh fragments.
static String	INDEX_FILE_NAME Default name for the binary index file that contains the multiresolution DAG.
Node[]	nodes Contains all Nodes of the DAG, the array index corresponds to its id.

Constructor Summary

MultiresolutionMesh(File dir, DirectByteBufferPool directBufferPool)
Creates a new MultiresolutionMesh by reading the fragment (FRAGMENTS_FILE_NAME) and index ( INDEX_FILE_NAME) blobs in the given directory.

MultiresolutionMesh(File mrIndex, File meshFragments, DirectByteBufferPool directBufferPool)
Creates a new MultiresolutionMesh by reading the specified fragment (FRAGMENTS_FILE_NAME) and index ( INDEX_FILE_NAME) blobs.

Method Summary

List<MeshFragment>	extractLOD(LODCriterion crit) Extracts the smallest LOD that satisfies the given LOD criterion.
List<MeshFragment>	extractLODFragment(LODCriterion crit, ViewFrustum roi) Extracts the smallest LOD fragment that satisfies the given LOD criterion .
double[][]	getBBox()

Methods inherited from class java.lang.Object

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

Field Detail

FRAGMENTS_FILE_NAME

public static final String FRAGMENTS_FILE_NAME

Default name for the binary file that contains the mesh fragments.

See Also:

Constant Field Values

INDEX_FILE_NAME

public static final String INDEX_FILE_NAME

Default name for the binary index file that contains the multiresolution DAG.

See Also:

Constant Field Values

nodes

public Node[] nodes

Contains all Nodes of the DAG, the array index corresponds to its id.

arcs

public Arc[] arcs

Contains all Arcs of the DAG, the array index corresponds to its id.

fragments

public MeshFragment[] fragments

Contains all MeshFragments of the DAG, the array index corresponds to its id.

Constructor Detail

MultiresolutionMesh

public MultiresolutionMesh(File dir,
                           DirectByteBufferPool directBufferPool)
                    throws IOException

Creates a new MultiresolutionMesh by reading the fragment (FRAGMENTS_FILE_NAME) and index ( INDEX_FILE_NAME) blobs in the given directory.

Parameters:

dir - directory that contains the fragment and index blobs to be read

Throws:

IOException

MultiresolutionMesh

public MultiresolutionMesh(File mrIndex,
                           File meshFragments,
                           DirectByteBufferPool directBufferPool)
                    throws IOException

Creates a new MultiresolutionMesh by reading the specified fragment (FRAGMENTS_FILE_NAME) and index ( INDEX_FILE_NAME) blobs.

Parameters:

mrIndex - index blob

meshFragments - fragment blob

Throws:

IOException

Method Detail

getBBox

public final double[][] getBBox()

Returns:

the domain of this multiresolution mesh as read from the first macro triangle fragment.

extractLOD

public List<MeshFragment> extractLOD(LODCriterion crit)

Extracts the smallest LOD that satisfies the given LOD criterion.

Parameters:

crit - criterion that the LOD must satisfies

Returns:

smallest LOD that satisfies the given LOD criterion

extractLODFragment

public List<MeshFragment> extractLODFragment(LODCriterion crit,
                                             ViewFrustum roi)

Extracts the smallest LOD fragment that satisfies the given LOD criterion .

Parameters:

crit - criterion that the LOD must satisfies

roi -

Returns:

smallest LOD that satisfies the given LOD criterion