Package io.goobi.viewer.model.media.voyager

Class GltfBoundingBoxReader

java.lang.Object

io.goobi.viewer.model.media.voyager.GltfBoundingBoxReader

public final class GltfBoundingBoxReader
extends Object

Reads the axis-aligned bounding box center of a GLTF 2.0 or GLB 3D model without a dedicated GLTF library.

The GLTF 2.0 specification requires that every vertex-position accessor carries min and max arrays. This class extracts those values directly from the JSON metadata, making binary buffer parsing unnecessary.

All methods are static; this class is not meant to be instantiated.

Method Summary

Modifier and Type	Method	Description
static double[][]	computeBounds(Path gltfFile)	Returns the axis-aligned bounding box of all meshes in the given GLTF or GLB file.
static double[]	computeCenter(Path gltfFile)	Computes the bounding-box centre of all meshes in the given GLTF or GLB file.

Methods inherited from class java.lang.Object

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

Method Details

computeBounds

public static double[][] computeBounds(Path gltfFile)
                                throws IOException

Returns the axis-aligned bounding box of all meshes in the given GLTF or GLB file.

Parameters:

gltfFile - path to a .gltf or .glb file

Returns:

double[2][3] where [0] is the global min and [1] is the global max; both are [0,0,0] if no POSITION accessor min/max data is found

Throws:

IOException - if the file cannot be read

computeCenter

public static double[] computeCenter(Path gltfFile)
                              throws IOException

Computes the bounding-box centre of all meshes in the given GLTF or GLB file.

Parameters:

gltfFile - path to a .gltf or .glb file

Returns:

double[3] with [x, y, z] of the centre; [0, 0, 0] if no POSITION accessor min/max data is found

Throws:

IOException - if the file cannot be read