tracker: 3D Tiles / I3S

[ibgreen]

Continuing from #164

• I3SLoader: Support non-WGS84 coordinate systems #723

API cleanup

• Remove Tileset3D.options.headers (now supported by Tileset3D.options.loadOptions`) Tiles: options enhancements #1475

Tiles

• Normalize tile3d loaders protocol
• Handle region bounding boxes correctly
• Port region related classes to math.gl

3D Tiles

Sandbox to test tilesets in Cesium

Audit

• Tile3DLayer.loadOptions seems strange, see Improve point cloud examples by tuning screen space error #530. tilesetOptions would be more appropriate.

3d tiles deck.gl Example

• Add description field support to ion.js and example P1

3d-tiles module documentation

• Update documentation of Tileset3D class P0
• Update documentation of generic "3d-tiles loader category" P0

3d-tiles module tests

• Add render tests for 3d tiles P0
• Add traversal tests P0
• pointcloud: Enable Draco related unit tests Fix 3d point cloud Draco related tests #244 P1
• pointcloud: Enable all unit tests P1
• i3dm/b3dm: Enable all unit tests P1

glTF-based Tile parsing

• Fix async loading issue with ScenegraphLayer P0
• Fix ADDITIVE traversal (keep parent until children load) 3d-tiles: Traversal issues for REPLACEMENT tilesets (Disappearing tiles) #384 P0

deck.gl

• Feature: Support fixed frame Coordinate system in deck.gl P2
• Feature: Support unlit material in deck.gl

Full compliance with 3D tiles standard

• Styles (partially ported in WIP dir)
• Composite tiles (just render the subtiles)
• Hierarchical batch table (partially ported in live code)
• Support oct-encoded normals on GPU (need shader module)
• Vector tiles (Optional tile format)
• Geometry tiles (Optional tile format)

glTF THREE.js Example

• Refactor to build THREE.js geometries on onLoad
• Swap out custom traversal with loaders.gl traversal