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Carter Anderson
535cf401cc
Part 2 of #23619 In **Bevy 0.19** we are landing a subset of Bevy's Next Generation Scene system (often known as BSN), which now lives in the `bevy_scene` / `bevy::scene` crate. However the old `bevy_scene` system still needs to stick around for a bit longer, as it provides some features that Bevy's Next Generation Scene system doesn't (yet!): 1. It is not _yet_ possible to write a World _to_ BSN, so the old system is still necessary for "round trip World serialization". 2. The GLTF scene loader has not yet been ported to BSN, so the old system is still necessary to spawn GLTF scenes in Bevy. For this reason, we have renamed the old `bevy_scene` crate to `bevy_world_serialization`. If you were referencing `bevy_scene::*` or `bevy::scene::*` types, rename those paths to `bevy_world_serialization::*` and `bevy::world_serialization::*` respectively. Additionally, to avoid confusion / conflicts with the new scene system, all "scene" terminology / types have been reframed as "world serialization": - `Scene` -> `WorldAsset` (as this was always just a World wrapper) - `SceneRoot` -> `WorldAssetRoot` - `DynamicScene` -> `DynamicWorld` - `DynamicScene::from_scene` -> `DynamicWorld::from_world_asset` - `DynamicSceneBuilder` -> `DynamicWorldBuilder` - `DynamicSceneRoot` -> `DynamicWorldRoot` - `SceneInstanceReady` -> `WorldInstanceReady` - `SceneLoader` -> `WorldAssetLoader` - `ScenePlugin` -> `WorldSerializationPlugin` - `SceneRootTemplate` -> `WorldAssetRootTemplate` - `SceneSpawner` -> `WorldInstanceSpawner` - `SceneFilter` -> `WorldFilter` - `SceneLoaderError` -> `WorldAssetLoaderError` - `SceneSpawnError` -> `WorldInstanceSpawnError` Note that I went with `bevy_world_serialization` over `bevy_ecs_serialization`, as that is what all of the internal features described themselves as. I think it is both more specific and does a better job of making itself decoupled from `bevy_ecs` proper.
Bistro Example
Download Amazon Lumberyard version of bistro from developer.nvidia.com (or see link below for processed glTF files with instancing)
Reexport BistroExterior.fbx and BistroInterior_Wine.fbx as GLTF files (in .gltf + .bin + textures format). Move the files into the respective bistro_exterior and bistro_interior_wine folders.
- Press 1, 2 or 3 for various camera positions.
- Press B for benchmark.
- Press to animate camera along path.
Run with texture compression while caching compressed images to disk for faster startup times:
cargo run -p bistro --release --features mipmap_generator/compress -- --cache
Options:
--no-gltf-lights disable glTF lights
--minimal disable bloom, AO, AA, shadows
--compress compress textures (if they are not already, requires
compress feature)
--low-quality-compression
if low_quality_compression is set, only 0.5 byte/px formats
will be used (BC1, BC4) unless the alpha channel is in use,
then BC3 will be used. When low quality is set, compression
is generally faster than CompressionSpeed::UltraFast and
CompressionSpeed is ignored.
--cache compressed texture cache (requires compress feature)
--count quantity of bistros
--spin spin the bistros and camera
--hide-frame-time don't show frame time
--deferred use deferred shading
--no-frustum-culling
disable all frustum culling. Stresses queuing and batching
as all mesh material entities in the scene are always drawn.
--no-automatic-batching
disable automatic batching. Skips batching resulting in
heavy stress on render pass draw command encoding.
--no-view-occlusion-culling
disable gpu occlusion culling for the camera
--no-shadow-occlusion-culling
disable gpu occlusion culling for the directional light
--no-indirect-drawing
disable indirect drawing.
--no-cpu-culling disable CPU culling.
--help, help display usage information
Alternate processed files with instancing (glTF files on discord):
- Fixed most of the metallic from fbx issue by using a script that makes everything dielectric unless it has metal in the name of the material
- Made the plants alpha clip instead of blend
- Setup the glassware/liquid materials correctly
- Mesh origins are at individual bounding box center instead of world origin
- Removed duplicate vertices (There were lots of odd cases, often making one instance not match another that would otherwise exactly match)
- Made the scene use instances (unique mesh count 3880 -> 1188)
- Removed 2 cases where duplicated meshes were overlapping
- Setup some of the interior/exterior lights with actual sources
- Setup some basic fake GI
- Use included scene HDRI for IBL