* Implement grid-based world origin snapping in View
Implement a grid-based world origin snapping system in View to avoid
per-frame transform updates in the future. This will allow to
improve CPU performance and to enable future caching of acceleration
structures like BVH.
The feature is protected by the 'view.enable_grid_based_world_origin'
feature flag. The grid size can be set
manually via View::setGridSize or calculated automatically as 10%
of the camera's far plane distance.
A 50% hysteresis ratio is applied to prevent rapid origin flipping
near grid edges.
Exposed the new API to Java and JavaScript bindings and added
unit tests in filament_test.cpp.
BUGS=[504726278]
* Refine grid-based world origin snapping implementation
Refine the grid-based world origin snapping in View with several
improvements:
1. Support Orthographic Projections:
Calculate automatic grid size using projection matrix elements,
working for both perspective and ortho without assuming positive
near plane.
2. Stable Automatic Grid Size:
Only update effective grid size when a position snap occurs.
This prevents instability when frustum scale changes smoothly.
3. Immediate Manual Override:
Force an immediate snap when user manually changes grid size.
Added test cases for ortho and auto-grid size in filament_test.cpp.
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