Hi All,
I need a little clarification about oriended box in TileSet definition.
Specs ( https://github.com/AnalyticalGraphicsInc/3dtiles/blob/master/schema/boundingVolume.schema.json ) says :
“box” : {
“type” : “array”,
“description” : “An array of 12 numbers that define an oriented bounding box in WGS84 coordinates.
The first three elements define the x, y, and z values for the center of the box.
The next three elements (with indices 3, 4, and 5) define the x axis direction and length.
The next three elements (indices 6, 7, and 8) define the y axis direction and length.
The last three elements (indices 9, 10, and 11) define the z axis direction and length.”,
“items” : {
“type” : “number”
},
“minItems” : 12,
“maxItems” : 12
},
``
I’m wondering what WGS84 coordinates does exactly mean :

Geographic/WGS84 : X & Y are Lon/Lat in radians and Z is a value in meters,

ECEF/WGS84 : X, Y and Z are ECEF coordinates in meters.

something else ?
Does anyone here can clarify ?
Thanks in advance,
KR,
Fred.