batched-3d-tiles-demo
Demonstration of rendering 3d tiles with 3D Tiles Renderer using three.js BatchedMesh addon and now r159 core BatchedMesh object with multidraw:
The demo shows a use cased for three.js' BatchedMesh and WEBGL_multidraw_arrays extension that enables the drawing of a full 3D Tiles tileset in a single draw call by:
- allocating a maximum size index and vertex buffer length per geometry in the batched mesh.
- using a texture array to store all the active textures in the visible set.
- assigning overwriting geometry at an existing id with newly loaded geometry once it's no longer needed.
- toggling tile visibility based on tileset visibility.
Using WEBGL_multidraw_arrays enables:
- minimal unnecessary vertex drawing
- frustum culling
- draw order sorting