com.luciad.format.tiled3d.lpc

LuciadLightspeedClass TLcdPointCloudModelDecoder

java.lang.Object

com.luciad.format.tiled3d.lpc.TLcdPointCloudModelDecoder

All Implemented Interfaces:

ILcdModelDecoder

@LcdService(service=ILcdModelDecoder.class,
            priority=20000)
public final class TLcdPointCloudModelDecoder
extends Object
implements ILcdModelDecoder

This model decoder decodes point clouds in the Luciad point cloud file format (tilestore.lpc files).

Input files

File	Required	Entry point	Description
tilestore.lpc	x	x	Entry point of the point cloud dataset.
tiles	x		Directory containing the tile data.

Supported file transfer protocols

As random access to the data is required, this decoder only reads from files. So it can for example not read from an InputStream, from a http connection or from a file inside a jar file.

Model structure

• All models returned by this model decoder implement ILcd2DBoundsIndexedModel.
• The model descriptor is an ILcdDataModelDescriptor, but the elements in the model are not data objects. This allows you to still use the data model to access properties of individual points to build expressions for use in styling. Use ILcdDataModelDescriptor.getModelTypes() ()} to obtain the single data type that consists of the properties available in the point cloud data.

Model descriptor

• The type name of the model descriptor is "LuciadPC".

Model reference

• All models returned by this model decoder have a TLcdGeocentricReference.

Model elements

The model elements are bounded instances, of which the bounds can be retrieved using the ALcdBounds.fromDomainObject(Object) method.

Thread safety

• The decoded models are thread-safe for read access.

Sample code

Visualizing point cloud data sets on a Lightspeed view is done by using this model decoder and the TLsp3DTileLayerBuilder. It is not possible to visualize the data on a GXY view.

   String source = "tilestore.lpc";
   TLcdPointCloudModelDecoder modelDecoder = new TLcdPointCloudModelDecoder();
   if(modelDecoder.canDecodeSource(source)){
     ILcdModel model = modelDecoder.decode(source);
     ILspLayer layer = TLsp3DTileLayerBuilder.newBuilder().model(model).build();
   }
 

Since:

2018.0

Field Summary

Fields

Modifier and Type	Field and Description
static String	TYPE_NAME The type name for the decoded models.

Constructor Summary

Constructors

Constructor and Description
TLcdPointCloudModelDecoder()

Method Summary

Modifier and Type	Method and Description
boolean	canDecodeSource(String aSourceName) Checks whether this model decoder can decode the specified data source.
ILcdModel	decode(String aSourceName) Creates a new model from the given data source.
String	getDisplayName() Returns a short, displayable name for the format that is decoded by this ILcdModelDecoder.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.luciad.model.ILcdModelDecoder

canDecodeSource, decodeModelMetadata, decodeModelMetadata, decodeSource, discoverDataSources

Field Detail

TYPE_NAME

public static final String TYPE_NAME

The type name for the decoded models.

See Also:

Constant Field Values

Constructor Detail

TLcdPointCloudModelDecoder

public TLcdPointCloudModelDecoder()

Method Detail

getDisplayName

public String getDisplayName()

Description copied from interface: ILcdModelDecoder

Returns a short, displayable name for the format that is decoded by this ILcdModelDecoder.

Specified by:

getDisplayName in interface ILcdModelDecoder

Returns:

the displayable name of this ILcdModelDecoder.

canDecodeSource

public boolean canDecodeSource(String aSourceName)

Description copied from interface: ILcdModelDecoder

Checks whether this model decoder can decode the specified data source. It is acceptable for this method to return true for a source name while decode throws an exception for that same source name.

For performance reasons, we strongly recommend that this will only be a simple test. For example: check the file extension of a file, but not that the file exists or contains expected content.

Specified by:

canDecodeSource in interface ILcdModelDecoder

Parameters:

aSourceName - the data source to be verified; typically a file name or a URL.

Returns:

true if this decoder can likely decode the data specified by the source name, false otherwise.

See Also:

ILcdModelDecoder.decode(String), ILcdModelDecoder.decodeModelMetadata(String)

decode

public ILcdModel decode(String aSourceName)
                 throws IOException

Description copied from interface: ILcdModelDecoder

Creates a new model from the given data source.

Specified by:

decode in interface ILcdModelDecoder

Parameters:

aSourceName - the data source to be decoded; typically a file name or a URL.

Returns:

A model containing the decoded data. While null is allowed, implementors are advised to throw an error instead.

Throws:

IOException - for any exceptions caused by IO problems or invalid data. Since decoding invalid data almost always results in RunTimeExceptions (NullPointerException, IndexOutOfBoundsException, IllegalArgumentException, ...) on unexpected places, implementations are advised to catch RuntimeExceptions in their decode() method, and wrap them into an IOException, as illustrated in the code snippet below.

   public ILcdModel decode( String aSourceName ) throws IOException {
      try (InputStream input = fInputStreamFactory.createInputStream(aSourceName)) {
         // Perform decoding ...
      } catch (RuntimeException e) {
         throw new IOException(e);
      }
   }
 

InterruptedIOException - When the thread on which this method is called is interrupted: it is recommended to stop the decoding and throw an InterruptedIOException. This same exception can also be used if the decoder shows UI to the user, and the user cancels the decoding through the UI.

See Also:

ILcdModelDecoder.canDecodeSource(String)