Package com.jme3.scene.plugins.gltf

Class DracoMeshCompressionExtensionLoader

java.lang.Object

com.jme3.scene.plugins.gltf.DracoMeshCompressionExtensionLoader

All Implemented Interfaces:

ExtensionLoader

public class DracoMeshCompressionExtensionLoader
extends Object
implements ExtensionLoader

A class for handling the KHR_draco_mesh_compression extension when loading a glTF asset. It is registered as the handler for this extension in the glTF CustomContentManager. In the GltfLoader.readMeshPrimitives(int) method, the custom content handler will be called for each mesh primitive, and handle the KHR_draco_mesh_compression of the primitive by calling the handleExtension(com.jme3.scene.plugins.gltf.GltfLoader, java.lang.String, com.jme3.plugins.json.JsonElement, com.jme3.plugins.json.JsonElement, java.lang.Object) method of this class. TODO_DRACO Strictly speaking, the loader should ignore any attribute definitions when the draco extension is present. Right now, this is called after the mesh was already filled with the vertex buffers that have been created by the default loading process. See the check for "bufferViewIndex == null" in VertexBufferPopulator.

Constructor Summary

Constructors

Constructor	Description
DracoMeshCompressionExtensionLoader()

Method Summary

Modifier and Type	Method	Description
Object	handleExtension(GltfLoader loader, String parentName, com.jme3.plugins.json.JsonElement parent, com.jme3.plugins.json.JsonElement extension, Object input)	The parentName will be "primitive" The parent" will be the JSON element that represents the mesh primitive from the glTF JSON. The extension will be the JSON element that represents the KHR_draco_mesh_compression extension object. Handles a glTF extension.

Methods inherited from class java.lang.Object

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

Constructor Details

DracoMeshCompressionExtensionLoader

public DracoMeshCompressionExtensionLoader()

Method Details

handleExtension

public Object handleExtension(GltfLoader loader,
 String parentName,
 com.jme3.plugins.json.JsonElement parent,
 com.jme3.plugins.json.JsonElement extension,
 Object input)
                       throws IOException

• The parentName will be "primitive"
• The parent" will be the JSON element that represents the mesh primitive from the glTF JSON.
• The extension will be the JSON element that represents the KHR_draco_mesh_compression extension object.

Handles a glTF extension.

Specified by:

handleExtension in interface ExtensionLoader

Parameters:

loader - the GltfLoader with all the data structures

parentName - the name of the element being read

parent - the element being read

extension - the content of the extension found in the element being read

input - an object containing already loaded data from the element, probably a JME object

Returns:

An object of the same type as input, containing the data from the input object and the eventual additional data read from the extension

Throws:

IOException - for various error conditions